--- /dev/null
+ /*
+ * Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
+ * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2011 Bryan Cain
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+ /**
+ * \file glsl_to_tgsi.cpp
+ *
+ * Translate GLSL IR to TGSI.
+ */
+
+ #include <stdio.h>
+ #include "main/compiler.h"
+ #include "ir.h"
+ #include "ir_visitor.h"
+ #include "ir_print_visitor.h"
+ #include "ir_expression_flattening.h"
+ #include "glsl_types.h"
+ #include "glsl_parser_extras.h"
+ #include "../glsl/program.h"
+ #include "ir_optimization.h"
+ #include "ast.h"
+
+ extern "C" {
+ #include "main/mtypes.h"
+ #include "main/shaderapi.h"
+ #include "main/shaderobj.h"
+ #include "main/uniforms.h"
+ #include "program/hash_table.h"
+ #include "program/prog_instruction.h"
+ #include "program/prog_optimize.h"
+ #include "program/prog_print.h"
+ #include "program/program.h"
+ #include "program/prog_uniform.h"
+ #include "program/prog_parameter.h"
+ #include "program/sampler.h"
+
+ #include "pipe/p_compiler.h"
+ #include "pipe/p_context.h"
+ #include "pipe/p_screen.h"
+ #include "pipe/p_shader_tokens.h"
+ #include "pipe/p_state.h"
+ #include "util/u_math.h"
+ #include "tgsi/tgsi_ureg.h"
+ #include "tgsi/tgsi_info.h"
+ #include "st_context.h"
+ #include "st_program.h"
+ #include "st_glsl_to_tgsi.h"
+ #include "st_mesa_to_tgsi.h"
+ }
+
+ #define PROGRAM_IMMEDIATE PROGRAM_FILE_MAX
+ #define PROGRAM_ANY_CONST ((1 << PROGRAM_LOCAL_PARAM) | \
+ (1 << PROGRAM_ENV_PARAM) | \
+ (1 << PROGRAM_STATE_VAR) | \
+ (1 << PROGRAM_NAMED_PARAM) | \
+ (1 << PROGRAM_CONSTANT) | \
+ (1 << PROGRAM_UNIFORM))
+
+ #define MAX_TEMPS 4096
+
+ class st_src_reg;
+ class st_dst_reg;
+
+ static int swizzle_for_size(int size);
+
+ /**
+ * This struct is a corresponding struct to TGSI ureg_src.
+ */
+ class st_src_reg {
+ public:
+ st_src_reg(gl_register_file file, int index, const glsl_type *type)
+ {
+ this->file = file;
+ this->index = index;
+ if (type && (type->is_scalar() || type->is_vector() || type->is_matrix()))
+ this->swizzle = swizzle_for_size(type->vector_elements);
+ else
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->type = type ? type->base_type : GLSL_TYPE_ERROR;
+ this->reladdr = NULL;
+ }
+
+ st_src_reg(gl_register_file file, int index, int type)
+ {
+ this->type = type;
+ this->file = file;
+ this->index = index;
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->reladdr = NULL;
+ }
+
+ st_src_reg()
+ {
+ this->type = GLSL_TYPE_ERROR;
+ this->file = PROGRAM_UNDEFINED;
+ this->index = 0;
+ this->swizzle = 0;
+ this->negate = 0;
+ this->reladdr = NULL;
+ }
+
+ explicit st_src_reg(st_dst_reg reg);
+
+ gl_register_file file; /**< PROGRAM_* from Mesa */
+ int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
+ GLuint swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
+ int negate; /**< NEGATE_XYZW mask from mesa */
+ int type; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+ /** Register index should be offset by the integer in this reg. */
+ st_src_reg *reladdr;
+ };
+
+ class st_dst_reg {
+ public:
+ st_dst_reg(gl_register_file file, int writemask, int type)
+ {
+ this->file = file;
+ this->index = 0;
+ this->writemask = writemask;
+ this->cond_mask = COND_TR;
+ this->reladdr = NULL;
+ this->type = type;
+ }
+
+ st_dst_reg()
+ {
+ this->type = GLSL_TYPE_ERROR;
+ this->file = PROGRAM_UNDEFINED;
+ this->index = 0;
+ this->writemask = 0;
+ this->cond_mask = COND_TR;
+ this->reladdr = NULL;
+ }
+
+ explicit st_dst_reg(st_src_reg reg);
+
+ gl_register_file file; /**< PROGRAM_* from Mesa */
+ int index; /**< temporary index, VERT_ATTRIB_*, FRAG_ATTRIB_*, etc. */
+ int writemask; /**< Bitfield of WRITEMASK_[XYZW] */
+ GLuint cond_mask:4;
+ int type; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+ /** Register index should be offset by the integer in this reg. */
+ st_src_reg *reladdr;
+ };
+
+ st_src_reg::st_src_reg(st_dst_reg reg)
+ {
+ this->type = reg.type;
+ this->file = reg.file;
+ this->index = reg.index;
+ this->swizzle = SWIZZLE_XYZW;
+ this->negate = 0;
+ this->reladdr = reg.reladdr;
+ }
+
+ st_dst_reg::st_dst_reg(st_src_reg reg)
+ {
+ this->type = reg.type;
+ this->file = reg.file;
+ this->index = reg.index;
+ this->writemask = WRITEMASK_XYZW;
+ this->cond_mask = COND_TR;
+ this->reladdr = reg.reladdr;
+ }
+
+ class glsl_to_tgsi_instruction : public exec_node {
+ public:
+ /* Callers of this ralloc-based new need not call delete. It's
+ * easier to just ralloc_free 'ctx' (or any of its ancestors). */
+ static void* operator new(size_t size, void *ctx)
+ {
+ void *node;
+
+ node = rzalloc_size(ctx, size);
+ assert(node != NULL);
+
+ return node;
+ }
+
+ unsigned op;
+ st_dst_reg dst;
+ st_src_reg src[3];
+ /** Pointer to the ir source this tree came from for debugging */
+ ir_instruction *ir;
+ GLboolean cond_update;
+ bool saturate;
+ int sampler; /**< sampler index */
+ int tex_target; /**< One of TEXTURE_*_INDEX */
+ GLboolean tex_shadow;
+ int dead_mask; /**< Used in dead code elimination */
+
+ class function_entry *function; /* Set on TGSI_OPCODE_CAL or TGSI_OPCODE_BGNSUB */
+ };
+
+ class variable_storage : public exec_node {
+ public:
+ variable_storage(ir_variable *var, gl_register_file file, int index)
+ : file(file), index(index), var(var)
+ {
+ /* empty */
+ }
+
+ gl_register_file file;
+ int index;
+ ir_variable *var; /* variable that maps to this, if any */
+ };
+
+ class immediate_storage : public exec_node {
+ public:
+ immediate_storage(gl_constant_value *values, int size, int type)
+ {
+ memcpy(this->values, values, size * sizeof(gl_constant_value));
+ this->size = size;
+ this->type = type;
+ }
+
+ gl_constant_value values[4];
+ int size; /**< Number of components (1-4) */
+ int type; /**< GL_FLOAT, GL_INT, GL_BOOL, or GL_UNSIGNED_INT */
+ };
+
+ class function_entry : public exec_node {
+ public:
+ ir_function_signature *sig;
+
+ /**
+ * identifier of this function signature used by the program.
+ *
+ * At the point that TGSI instructions for function calls are
+ * generated, we don't know the address of the first instruction of
+ * the function body. So we make the BranchTarget that is called a
+ * small integer and rewrite them during set_branchtargets().
+ */
+ int sig_id;
+
+ /**
+ * Pointer to first instruction of the function body.
+ *
+ * Set during function body emits after main() is processed.
+ */
+ glsl_to_tgsi_instruction *bgn_inst;
+
+ /**
+ * Index of the first instruction of the function body in actual TGSI.
+ *
+ * Set after conversion from glsl_to_tgsi_instruction to TGSI.
+ */
+ int inst;
+
+ /** Storage for the return value. */
+ st_src_reg return_reg;
+ };
+
+ class glsl_to_tgsi_visitor : public ir_visitor {
+ public:
+ glsl_to_tgsi_visitor();
+ ~glsl_to_tgsi_visitor();
+
+ function_entry *current_function;
+
+ struct gl_context *ctx;
+ struct gl_program *prog;
+ struct gl_shader_program *shader_program;
+ struct gl_shader_compiler_options *options;
+
+ int next_temp;
+
+ int num_address_regs;
+ int samplers_used;
+ bool indirect_addr_temps;
+ bool indirect_addr_consts;
+
+ int glsl_version;
+
+ variable_storage *find_variable_storage(ir_variable *var);
+
+ int add_constant(gl_register_file file, gl_constant_value values[4],
+ int size, int datatype, GLuint *swizzle_out);
+
+ function_entry *get_function_signature(ir_function_signature *sig);
+
+ st_src_reg get_temp(const glsl_type *type);
+ void reladdr_to_temp(ir_instruction *ir, st_src_reg *reg, int *num_reladdr);
+
+ st_src_reg st_src_reg_for_float(float val);
+ st_src_reg st_src_reg_for_int(int val);
+ st_src_reg st_src_reg_for_type(int type, int val);
+
+ /**
+ * \name Visit methods
+ *
+ * As typical for the visitor pattern, there must be one \c visit method for
+ * each concrete subclass of \c ir_instruction. Virtual base classes within
+ * the hierarchy should not have \c visit methods.
+ */
+ /*@{*/
+ virtual void visit(ir_variable *);
+ virtual void visit(ir_loop *);
+ virtual void visit(ir_loop_jump *);
+ virtual void visit(ir_function_signature *);
+ virtual void visit(ir_function *);
+ virtual void visit(ir_expression *);
+ virtual void visit(ir_swizzle *);
+ virtual void visit(ir_dereference_variable *);
+ virtual void visit(ir_dereference_array *);
+ virtual void visit(ir_dereference_record *);
+ virtual void visit(ir_assignment *);
+ virtual void visit(ir_constant *);
+ virtual void visit(ir_call *);
+ virtual void visit(ir_return *);
+ virtual void visit(ir_discard *);
+ virtual void visit(ir_texture *);
+ virtual void visit(ir_if *);
+ /*@}*/
+
+ st_src_reg result;
+
+ /** List of variable_storage */
+ exec_list variables;
+
+ /** List of immediate_storage */
+ exec_list immediates;
+ int num_immediates;
+
+ /** List of function_entry */
+ exec_list function_signatures;
+ int next_signature_id;
+
+ /** List of glsl_to_tgsi_instruction */
+ exec_list instructions;
+
+ glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op);
+
+ glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0);
+
+ glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0, st_src_reg src1);
+
+ glsl_to_tgsi_instruction *emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ st_src_reg src0, st_src_reg src1, st_src_reg src2);
+
+ unsigned get_opcode(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ st_src_reg src0, st_src_reg src1);
+
+ /**
+ * Emit the correct dot-product instruction for the type of arguments
+ */
+ void emit_dp(ir_instruction *ir,
+ st_dst_reg dst,
+ st_src_reg src0,
+ st_src_reg src1,
+ unsigned elements);
+
+ void emit_scalar(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0);
+
+ void emit_scalar(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0, st_src_reg src1);
+
+ void emit_arl(ir_instruction *ir, st_dst_reg dst, st_src_reg src0);
+
+ void emit_scs(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, const st_src_reg &src);
+
+ GLboolean try_emit_mad(ir_expression *ir,
+ int mul_operand);
+ GLboolean try_emit_sat(ir_expression *ir);
+
+ void emit_swz(ir_expression *ir);
+
+ bool process_move_condition(ir_rvalue *ir);
+
+ void remove_output_reads(gl_register_file type);
+ void simplify_cmp(void);
+
+ void rename_temp_register(int index, int new_index);
+ int get_first_temp_read(int index);
+ int get_first_temp_write(int index);
+ int get_last_temp_read(int index);
+ int get_last_temp_write(int index);
+
+ void copy_propagate(void);
+ void eliminate_dead_code(void);
+ int eliminate_dead_code_advanced(void);
+ void merge_registers(void);
+ void renumber_registers(void);
+
+ void *mem_ctx;
+ };
+
+ static st_src_reg undef_src = st_src_reg(PROGRAM_UNDEFINED, 0, GLSL_TYPE_ERROR);
+
+ static st_dst_reg undef_dst = st_dst_reg(PROGRAM_UNDEFINED, SWIZZLE_NOOP, GLSL_TYPE_ERROR);
+
+ static st_dst_reg address_reg = st_dst_reg(PROGRAM_ADDRESS, WRITEMASK_X, GLSL_TYPE_FLOAT);
+
+ static void
+ fail_link(struct gl_shader_program *prog, const char *fmt, ...) PRINTFLIKE(2, 3);
+
+ static void
+ fail_link(struct gl_shader_program *prog, const char *fmt, ...)
+ {
+ va_list args;
+ va_start(args, fmt);
+ ralloc_vasprintf_append(&prog->InfoLog, fmt, args);
+ va_end(args);
+
+ prog->LinkStatus = GL_FALSE;
+ }
+
+ static int
+ swizzle_for_size(int size)
+ {
+ int size_swizzles[4] = {
+ MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X),
+ MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y),
+ MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z),
+ MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W),
+ };
+
+ assert((size >= 1) && (size <= 4));
+ return size_swizzles[size - 1];
+ }
+
+ static bool
+ is_tex_instruction(unsigned opcode)
+ {
+ const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode);
+ return info->is_tex;
+ }
+
+ static unsigned
+ num_inst_dst_regs(unsigned opcode)
+ {
+ const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode);
+ return info->num_dst;
+ }
+
+ static unsigned
+ num_inst_src_regs(unsigned opcode)
+ {
+ const tgsi_opcode_info* info = tgsi_get_opcode_info(opcode);
+ return info->is_tex ? info->num_src - 1 : info->num_src;
+ }
+
+ glsl_to_tgsi_instruction *
+ glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ st_src_reg src0, st_src_reg src1, st_src_reg src2)
+ {
+ glsl_to_tgsi_instruction *inst = new(mem_ctx) glsl_to_tgsi_instruction();
+ int num_reladdr = 0, i;
+
+ op = get_opcode(ir, op, dst, src0, src1);
+
+ /* If we have to do relative addressing, we want to load the ARL
+ * reg directly for one of the regs, and preload the other reladdr
+ * sources into temps.
+ */
+ num_reladdr += dst.reladdr != NULL;
+ num_reladdr += src0.reladdr != NULL;
+ num_reladdr += src1.reladdr != NULL;
+ num_reladdr += src2.reladdr != NULL;
+
+ reladdr_to_temp(ir, &src2, &num_reladdr);
+ reladdr_to_temp(ir, &src1, &num_reladdr);
+ reladdr_to_temp(ir, &src0, &num_reladdr);
+
+ if (dst.reladdr) {
+ emit_arl(ir, address_reg, *dst.reladdr);
+ num_reladdr--;
+ }
+ assert(num_reladdr == 0);
+
+ inst->op = op;
+ inst->dst = dst;
+ inst->src[0] = src0;
+ inst->src[1] = src1;
+ inst->src[2] = src2;
+ inst->ir = ir;
+ inst->dead_mask = 0;
+
+ inst->function = NULL;
+
+ if (op == TGSI_OPCODE_ARL)
+ this->num_address_regs = 1;
+
+ /* Update indirect addressing status used by TGSI */
+ if (dst.reladdr) {
+ switch(dst.file) {
+ case PROGRAM_TEMPORARY:
+ this->indirect_addr_temps = true;
+ break;
+ case PROGRAM_LOCAL_PARAM:
+ case PROGRAM_ENV_PARAM:
+ case PROGRAM_STATE_VAR:
+ case PROGRAM_NAMED_PARAM:
+ case PROGRAM_CONSTANT:
+ case PROGRAM_UNIFORM:
+ this->indirect_addr_consts = true;
+ break;
+ case PROGRAM_IMMEDIATE:
+ assert(!"immediates should not have indirect addressing");
+ break;
+ default:
+ break;
+ }
+ }
+ else {
+ for (i=0; i<3; i++) {
+ if(inst->src[i].reladdr) {
+ switch(inst->src[i].file) {
+ case PROGRAM_TEMPORARY:
+ this->indirect_addr_temps = true;
+ break;
+ case PROGRAM_LOCAL_PARAM:
+ case PROGRAM_ENV_PARAM:
+ case PROGRAM_STATE_VAR:
+ case PROGRAM_NAMED_PARAM:
+ case PROGRAM_CONSTANT:
+ case PROGRAM_UNIFORM:
+ this->indirect_addr_consts = true;
+ break;
+ case PROGRAM_IMMEDIATE:
+ assert(!"immediates should not have indirect addressing");
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+
+ this->instructions.push_tail(inst);
+
+ return inst;
+ }
+
+
+ glsl_to_tgsi_instruction *
+ glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0, st_src_reg src1)
+ {
+ return emit(ir, op, dst, src0, src1, undef_src);
+ }
+
+ glsl_to_tgsi_instruction *
+ glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0)
+ {
+ assert(dst.writemask != 0);
+ return emit(ir, op, dst, src0, undef_src, undef_src);
+ }
+
+ glsl_to_tgsi_instruction *
+ glsl_to_tgsi_visitor::emit(ir_instruction *ir, unsigned op)
+ {
+ return emit(ir, op, undef_dst, undef_src, undef_src, undef_src);
+ }
+
+ /**
+ * Determines whether to use an integer, unsigned integer, or float opcode
+ * based on the operands and input opcode, then emits the result.
+ *
+ * TODO: type checking for remaining TGSI opcodes
+ */
+ unsigned
+ glsl_to_tgsi_visitor::get_opcode(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ st_src_reg src0, st_src_reg src1)
+ {
+ int type = GLSL_TYPE_FLOAT;
+
+ if (src0.type == GLSL_TYPE_FLOAT || src1.type == GLSL_TYPE_FLOAT)
+ type = GLSL_TYPE_FLOAT;
+ else if (glsl_version >= 130)
+ type = src0.type;
+
+ #define case4(c, f, i, u) \
+ case TGSI_OPCODE_##c: \
+ if (type == GLSL_TYPE_INT) op = TGSI_OPCODE_##i; \
+ else if (type == GLSL_TYPE_UINT) op = TGSI_OPCODE_##u; \
+ else op = TGSI_OPCODE_##f; \
+ break;
+ #define case3(f, i, u) case4(f, f, i, u)
+ #define case2fi(f, i) case4(f, f, i, i)
+ #define case2iu(i, u) case4(i, LAST, i, u)
+
+ switch(op) {
+ case2fi(ADD, UADD);
+ case2fi(MUL, UMUL);
+ case2fi(MAD, UMAD);
+ case3(DIV, IDIV, UDIV);
+ case3(MAX, IMAX, UMAX);
+ case3(MIN, IMIN, UMIN);
+ case2iu(MOD, UMOD);
+
+ case2fi(SEQ, USEQ);
+ case2fi(SNE, USNE);
+ case3(SGE, ISGE, USGE);
+ case3(SLT, ISLT, USLT);
+
+ case2iu(SHL, SHL);
+ case2iu(ISHR, USHR);
+ case2iu(NOT, NOT);
+ case2iu(AND, AND);
+ case2iu(OR, OR);
+ case2iu(XOR, XOR);
+
+ default: break;
+ }
+
+ assert(op != TGSI_OPCODE_LAST);
+ return op;
+ }
+
+ void
+ glsl_to_tgsi_visitor::emit_dp(ir_instruction *ir,
+ st_dst_reg dst, st_src_reg src0, st_src_reg src1,
+ unsigned elements)
+ {
+ static const unsigned dot_opcodes[] = {
+ TGSI_OPCODE_DP2, TGSI_OPCODE_DP3, TGSI_OPCODE_DP4
+ };
+
+ emit(ir, dot_opcodes[elements - 2], dst, src0, src1);
+ }
+
+ /**
+ * Emits TGSI scalar opcodes to produce unique answers across channels.
+ *
+ * Some TGSI opcodes are scalar-only, like ARB_fp/vp. The src X
+ * channel determines the result across all channels. So to do a vec4
+ * of this operation, we want to emit a scalar per source channel used
+ * to produce dest channels.
+ */
+ void
+ glsl_to_tgsi_visitor::emit_scalar(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ st_src_reg orig_src0, st_src_reg orig_src1)
+ {
+ int i, j;
+ int done_mask = ~dst.writemask;
+
+ /* TGSI RCP is a scalar operation splatting results to all channels,
+ * like ARB_fp/vp. So emit as many RCPs as necessary to cover our
+ * dst channels.
+ */
+ for (i = 0; i < 4; i++) {
+ GLuint this_mask = (1 << i);
+ glsl_to_tgsi_instruction *inst;
+ st_src_reg src0 = orig_src0;
+ st_src_reg src1 = orig_src1;
+
+ if (done_mask & this_mask)
+ continue;
+
+ GLuint src0_swiz = GET_SWZ(src0.swizzle, i);
+ GLuint src1_swiz = GET_SWZ(src1.swizzle, i);
+ for (j = i + 1; j < 4; j++) {
+ /* If there is another enabled component in the destination that is
+ * derived from the same inputs, generate its value on this pass as
+ * well.
+ */
+ if (!(done_mask & (1 << j)) &&
+ GET_SWZ(src0.swizzle, j) == src0_swiz &&
+ GET_SWZ(src1.swizzle, j) == src1_swiz) {
+ this_mask |= (1 << j);
+ }
+ }
+ src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
+ src0_swiz, src0_swiz);
+ src1.swizzle = MAKE_SWIZZLE4(src1_swiz, src1_swiz,
+ src1_swiz, src1_swiz);
+
+ inst = emit(ir, op, dst, src0, src1);
+ inst->dst.writemask = this_mask;
+ done_mask |= this_mask;
+ }
+ }
+
+ void
+ glsl_to_tgsi_visitor::emit_scalar(ir_instruction *ir, unsigned op,
+ st_dst_reg dst, st_src_reg src0)
+ {
+ st_src_reg undef = undef_src;
+
+ undef.swizzle = SWIZZLE_XXXX;
+
+ emit_scalar(ir, op, dst, src0, undef);
+ }
+
+ void
+ glsl_to_tgsi_visitor::emit_arl(ir_instruction *ir,
+ st_dst_reg dst, st_src_reg src0)
+ {
+ st_src_reg tmp = get_temp(glsl_type::float_type);
+
+ if (src0.type == GLSL_TYPE_INT)
+ emit(NULL, TGSI_OPCODE_I2F, st_dst_reg(tmp), src0);
+ else if (src0.type == GLSL_TYPE_UINT)
+ emit(NULL, TGSI_OPCODE_U2F, st_dst_reg(tmp), src0);
+ else
+ tmp = src0;
+
+ emit(NULL, TGSI_OPCODE_ARL, dst, tmp);
+ }
+
+ /**
+ * Emit an TGSI_OPCODE_SCS instruction
+ *
+ * The \c SCS opcode functions a bit differently than the other TGSI opcodes.
+ * Instead of splatting its result across all four components of the
+ * destination, it writes one value to the \c x component and another value to
+ * the \c y component.
+ *
+ * \param ir IR instruction being processed
+ * \param op Either \c TGSI_OPCODE_SIN or \c TGSI_OPCODE_COS depending
+ * on which value is desired.
+ * \param dst Destination register
+ * \param src Source register
+ */
+ void
+ glsl_to_tgsi_visitor::emit_scs(ir_instruction *ir, unsigned op,
+ st_dst_reg dst,
+ const st_src_reg &src)
+ {
+ /* Vertex programs cannot use the SCS opcode.
+ */
+ if (this->prog->Target == GL_VERTEX_PROGRAM_ARB) {
+ emit_scalar(ir, op, dst, src);
+ return;
+ }
+
+ const unsigned component = (op == TGSI_OPCODE_SIN) ? 0 : 1;
+ const unsigned scs_mask = (1U << component);
+ int done_mask = ~dst.writemask;
+ st_src_reg tmp;
+
+ assert(op == TGSI_OPCODE_SIN || op == TGSI_OPCODE_COS);
+
+ /* If there are compnents in the destination that differ from the component
+ * that will be written by the SCS instrution, we'll need a temporary.
+ */
+ if (scs_mask != unsigned(dst.writemask)) {
+ tmp = get_temp(glsl_type::vec4_type);
+ }
+
+ for (unsigned i = 0; i < 4; i++) {
+ unsigned this_mask = (1U << i);
+ st_src_reg src0 = src;
+
+ if ((done_mask & this_mask) != 0)
+ continue;
+
+ /* The source swizzle specified which component of the source generates
+ * sine / cosine for the current component in the destination. The SCS
+ * instruction requires that this value be swizzle to the X component.
+ * Replace the current swizzle with a swizzle that puts the source in
+ * the X component.
+ */
+ unsigned src0_swiz = GET_SWZ(src.swizzle, i);
+
+ src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
+ src0_swiz, src0_swiz);
+ for (unsigned j = i + 1; j < 4; j++) {
+ /* If there is another enabled component in the destination that is
+ * derived from the same inputs, generate its value on this pass as
+ * well.
+ */
+ if (!(done_mask & (1 << j)) &&
+ GET_SWZ(src0.swizzle, j) == src0_swiz) {
+ this_mask |= (1 << j);
+ }
+ }
+
+ if (this_mask != scs_mask) {
+ glsl_to_tgsi_instruction *inst;
+ st_dst_reg tmp_dst = st_dst_reg(tmp);
+
+ /* Emit the SCS instruction.
+ */
+ inst = emit(ir, TGSI_OPCODE_SCS, tmp_dst, src0);
+ inst->dst.writemask = scs_mask;
+
+ /* Move the result of the SCS instruction to the desired location in
+ * the destination.
+ */
+ tmp.swizzle = MAKE_SWIZZLE4(component, component,
+ component, component);
+ inst = emit(ir, TGSI_OPCODE_SCS, dst, tmp);
+ inst->dst.writemask = this_mask;
+ } else {
+ /* Emit the SCS instruction to write directly to the destination.
+ */
+ glsl_to_tgsi_instruction *inst = emit(ir, TGSI_OPCODE_SCS, dst, src0);
+ inst->dst.writemask = scs_mask;
+ }
+
+ done_mask |= this_mask;
+ }
+ }
+
+ int
+ glsl_to_tgsi_visitor::add_constant(gl_register_file file,
+ gl_constant_value values[4], int size, int datatype,
+ GLuint *swizzle_out)
+ {
+ if (file == PROGRAM_CONSTANT) {
+ return _mesa_add_typed_unnamed_constant(this->prog->Parameters, values,
+ size, datatype, swizzle_out);
+ } else {
+ int index = 0;
+ immediate_storage *entry;
+ assert(file == PROGRAM_IMMEDIATE);
+
+ /* Search immediate storage to see if we already have an identical
+ * immediate that we can use instead of adding a duplicate entry.
+ */
+ foreach_iter(exec_list_iterator, iter, this->immediates) {
+ entry = (immediate_storage *)iter.get();
+
+ if (entry->size == size &&
+ entry->type == datatype &&
+ !memcmp(entry->values, values, size * sizeof(gl_constant_value))) {
+ return index;
+ }
+ index++;
+ }
+
+ /* Add this immediate to the list. */
+ entry = new(mem_ctx) immediate_storage(values, size, datatype);
+ this->immediates.push_tail(entry);
+ this->num_immediates++;
+ return index;
+ }
+ }
+
+ struct st_src_reg
+ glsl_to_tgsi_visitor::st_src_reg_for_float(float val)
+ {
+ st_src_reg src(PROGRAM_IMMEDIATE, -1, GLSL_TYPE_FLOAT);
+ union gl_constant_value uval;
+
+ uval.f = val;
+ src.index = add_constant(src.file, &uval, 1, GL_FLOAT, &src.swizzle);
+
+ return src;
+ }
+
+ struct st_src_reg
+ glsl_to_tgsi_visitor::st_src_reg_for_int(int val)
+ {
+ st_src_reg src(PROGRAM_IMMEDIATE, -1, GLSL_TYPE_INT);
+ union gl_constant_value uval;
+
+ assert(glsl_version >= 130);
+
+ uval.i = val;
+ src.index = add_constant(src.file, &uval, 1, GL_INT, &src.swizzle);
+
+ return src;
+ }
+
+ struct st_src_reg
+ glsl_to_tgsi_visitor::st_src_reg_for_type(int type, int val)
+ {
+ if (glsl_version >= 130)
+ return type == GLSL_TYPE_FLOAT ? st_src_reg_for_float(val) :
+ st_src_reg_for_int(val);
+ else
+ return st_src_reg_for_float(val);
+ }
+
+ static int
+ type_size(const struct glsl_type *type)
+ {
+ unsigned int i;
+ int size;
+
+ switch (type->base_type) {
+ case GLSL_TYPE_UINT:
+ case GLSL_TYPE_INT:
+ case GLSL_TYPE_FLOAT:
+ case GLSL_TYPE_BOOL:
+ if (type->is_matrix()) {
+ return type->matrix_columns;
+ } else {
+ /* Regardless of size of vector, it gets a vec4. This is bad
+ * packing for things like floats, but otherwise arrays become a
+ * mess. Hopefully a later pass over the code can pack scalars
+ * down if appropriate.
+ */
+ return 1;
+ }
+ case GLSL_TYPE_ARRAY:
+ assert(type->length > 0);
+ return type_size(type->fields.array) * type->length;
+ case GLSL_TYPE_STRUCT:
+ size = 0;
+ for (i = 0; i < type->length; i++) {
+ size += type_size(type->fields.structure[i].type);
+ }
+ return size;
+ case GLSL_TYPE_SAMPLER:
+ /* Samplers take up one slot in UNIFORMS[], but they're baked in
+ * at link time.
+ */
+ return 1;
+ default:
+ assert(0);
+ return 0;
+ }
+ }
+
+ /**
+ * In the initial pass of codegen, we assign temporary numbers to
+ * intermediate results. (not SSA -- variable assignments will reuse
+ * storage).
+ */
+ st_src_reg
+ glsl_to_tgsi_visitor::get_temp(const glsl_type *type)
+ {
+ st_src_reg src;
+ int swizzle[4];
+ int i;
+
+ src.type = glsl_version >= 130 ? type->base_type : GLSL_TYPE_FLOAT;
+ src.file = PROGRAM_TEMPORARY;
+ src.index = next_temp;
+ src.reladdr = NULL;
+ next_temp += type_size(type);
+
+ if (type->is_array() || type->is_record()) {
+ src.swizzle = SWIZZLE_NOOP;
+ } else {
+ for (i = 0; i < type->vector_elements; i++)
+ swizzle[i] = i;
+ for (; i < 4; i++)
+ swizzle[i] = type->vector_elements - 1;
+ src.swizzle = MAKE_SWIZZLE4(swizzle[0], swizzle[1],
+ swizzle[2], swizzle[3]);
+ }
+ src.negate = 0;
+
+ return src;
+ }
+
+ variable_storage *
+ glsl_to_tgsi_visitor::find_variable_storage(ir_variable *var)
+ {
+
+ variable_storage *entry;
+
+ foreach_iter(exec_list_iterator, iter, this->variables) {
+ entry = (variable_storage *)iter.get();
+
+ if (entry->var == var)
+ return entry;
+ }
+
+ return NULL;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_variable *ir)
+ {
+ if (strcmp(ir->name, "gl_FragCoord") == 0) {
+ struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+
+ fp->OriginUpperLeft = ir->origin_upper_left;
+ fp->PixelCenterInteger = ir->pixel_center_integer;
+
+ } else if (strcmp(ir->name, "gl_FragDepth") == 0) {
+ struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+ switch (ir->depth_layout) {
+ case ir_depth_layout_none:
+ fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_NONE;
+ break;
+ case ir_depth_layout_any:
+ fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_ANY;
+ break;
+ case ir_depth_layout_greater:
+ fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_GREATER;
+ break;
+ case ir_depth_layout_less:
+ fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_LESS;
+ break;
+ case ir_depth_layout_unchanged:
+ fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_UNCHANGED;
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ }
+
+ if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) {
+ unsigned int i;
+ const ir_state_slot *const slots = ir->state_slots;
+ assert(ir->state_slots != NULL);
+
+ /* Check if this statevar's setup in the STATE file exactly
+ * matches how we'll want to reference it as a
+ * struct/array/whatever. If not, then we need to move it into
+ * temporary storage and hope that it'll get copy-propagated
+ * out.
+ */
+ for (i = 0; i < ir->num_state_slots; i++) {
+ if (slots[i].swizzle != SWIZZLE_XYZW) {
+ break;
+ }
+ }
+
+ struct variable_storage *storage;
+ st_dst_reg dst;
+ if (i == ir->num_state_slots) {
+ /* We'll set the index later. */
+ storage = new(mem_ctx) variable_storage(ir, PROGRAM_STATE_VAR, -1);
+ this->variables.push_tail(storage);
+
+ dst = undef_dst;
+ } else {
+ /* The variable_storage constructor allocates slots based on the size
+ * of the type. However, this had better match the number of state
+ * elements that we're going to copy into the new temporary.
+ */
+ assert((int) ir->num_state_slots == type_size(ir->type));
+
+ storage = new(mem_ctx) variable_storage(ir, PROGRAM_TEMPORARY,
+ this->next_temp);
+ this->variables.push_tail(storage);
+ this->next_temp += type_size(ir->type);
+
+ dst = st_dst_reg(st_src_reg(PROGRAM_TEMPORARY, storage->index,
+ glsl_version >= 130 ? ir->type->base_type : GLSL_TYPE_FLOAT));
+ }
+
+
+ for (unsigned int i = 0; i < ir->num_state_slots; i++) {
+ int index = _mesa_add_state_reference(this->prog->Parameters,
+ (gl_state_index *)slots[i].tokens);
+
+ if (storage->file == PROGRAM_STATE_VAR) {
+ if (storage->index == -1) {
+ storage->index = index;
+ } else {
+ assert(index == storage->index + (int)i);
+ }
+ } else {
+ st_src_reg src(PROGRAM_STATE_VAR, index,
+ glsl_version >= 130 ? ir->type->base_type : GLSL_TYPE_FLOAT);
+ src.swizzle = slots[i].swizzle;
+ emit(ir, TGSI_OPCODE_MOV, dst, src);
+ /* even a float takes up a whole vec4 reg in a struct/array. */
+ dst.index++;
+ }
+ }
+
+ if (storage->file == PROGRAM_TEMPORARY &&
+ dst.index != storage->index + (int) ir->num_state_slots) {
+ fail_link(this->shader_program,
+ "failed to load builtin uniform `%s' (%d/%d regs loaded)\n",
+ ir->name, dst.index - storage->index,
+ type_size(ir->type));
+ }
+ }
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_loop *ir)
+ {
+ ir_dereference_variable *counter = NULL;
+
+ if (ir->counter != NULL)
+ counter = new(ir) ir_dereference_variable(ir->counter);
+
+ if (ir->from != NULL) {
+ assert(ir->counter != NULL);
+
+ ir_assignment *a = new(ir) ir_assignment(counter, ir->from, NULL);
+
+ a->accept(this);
+ delete a;
+ }
+
+ emit(NULL, TGSI_OPCODE_BGNLOOP);
+
+ if (ir->to) {
+ ir_expression *e =
+ new(ir) ir_expression(ir->cmp, glsl_type::bool_type,
+ counter, ir->to);
+ ir_if *if_stmt = new(ir) ir_if(e);
+
+ ir_loop_jump *brk = new(ir) ir_loop_jump(ir_loop_jump::jump_break);
+
+ if_stmt->then_instructions.push_tail(brk);
+
+ if_stmt->accept(this);
+
+ delete if_stmt;
+ delete e;
+ delete brk;
+ }
+
+ visit_exec_list(&ir->body_instructions, this);
+
+ if (ir->increment) {
+ ir_expression *e =
+ new(ir) ir_expression(ir_binop_add, counter->type,
+ counter, ir->increment);
+
+ ir_assignment *a = new(ir) ir_assignment(counter, e, NULL);
+
+ a->accept(this);
+ delete a;
+ delete e;
+ }
+
+ emit(NULL, TGSI_OPCODE_ENDLOOP);
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_loop_jump *ir)
+ {
+ switch (ir->mode) {
+ case ir_loop_jump::jump_break:
+ emit(NULL, TGSI_OPCODE_BRK);
+ break;
+ case ir_loop_jump::jump_continue:
+ emit(NULL, TGSI_OPCODE_CONT);
+ break;
+ }
+ }
+
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_function_signature *ir)
+ {
+ assert(0);
+ (void)ir;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_function *ir)
+ {
+ /* Ignore function bodies other than main() -- we shouldn't see calls to
+ * them since they should all be inlined before we get to glsl_to_tgsi.
+ */
+ if (strcmp(ir->name, "main") == 0) {
+ const ir_function_signature *sig;
+ exec_list empty;
+
+ sig = ir->matching_signature(&empty);
+
+ assert(sig);
+
+ foreach_iter(exec_list_iterator, iter, sig->body) {
+ ir_instruction *ir = (ir_instruction *)iter.get();
+
+ ir->accept(this);
+ }
+ }
+ }
+
+ GLboolean
+ glsl_to_tgsi_visitor::try_emit_mad(ir_expression *ir, int mul_operand)
+ {
+ int nonmul_operand = 1 - mul_operand;
+ st_src_reg a, b, c;
+ st_dst_reg result_dst;
+
+ ir_expression *expr = ir->operands[mul_operand]->as_expression();
+ if (!expr || expr->operation != ir_binop_mul)
+ return false;
+
+ expr->operands[0]->accept(this);
+ a = this->result;
+ expr->operands[1]->accept(this);
+ b = this->result;
+ ir->operands[nonmul_operand]->accept(this);
+ c = this->result;
+
+ this->result = get_temp(ir->type);
+ result_dst = st_dst_reg(this->result);
+ result_dst.writemask = (1 << ir->type->vector_elements) - 1;
+ emit(ir, TGSI_OPCODE_MAD, result_dst, a, b, c);
+
+ return true;
+ }
+
+ GLboolean
+ glsl_to_tgsi_visitor::try_emit_sat(ir_expression *ir)
+ {
+ /* Saturates were only introduced to vertex programs in
+ * NV_vertex_program3, so don't give them to drivers in the VP.
+ */
+ if (this->prog->Target == GL_VERTEX_PROGRAM_ARB)
+ return false;
+
+ ir_rvalue *sat_src = ir->as_rvalue_to_saturate();
+ if (!sat_src)
+ return false;
+
+ sat_src->accept(this);
+ st_src_reg src = this->result;
+
+ this->result = get_temp(ir->type);
+ st_dst_reg result_dst = st_dst_reg(this->result);
+ result_dst.writemask = (1 << ir->type->vector_elements) - 1;
+ glsl_to_tgsi_instruction *inst;
+ inst = emit(ir, TGSI_OPCODE_MOV, result_dst, src);
+ inst->saturate = true;
+
+ return true;
+ }
+
+ void
+ glsl_to_tgsi_visitor::reladdr_to_temp(ir_instruction *ir,
+ st_src_reg *reg, int *num_reladdr)
+ {
+ if (!reg->reladdr)
+ return;
+
+ emit_arl(ir, address_reg, *reg->reladdr);
+
+ if (*num_reladdr != 1) {
+ st_src_reg temp = get_temp(glsl_type::vec4_type);
+
+ emit(ir, TGSI_OPCODE_MOV, st_dst_reg(temp), *reg);
+ *reg = temp;
+ }
+
+ (*num_reladdr)--;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_expression *ir)
+ {
+ unsigned int operand;
+ st_src_reg op[Elements(ir->operands)];
+ st_src_reg result_src;
+ st_dst_reg result_dst;
+
+ /* Quick peephole: Emit MAD(a, b, c) instead of ADD(MUL(a, b), c)
+ */
+ if (ir->operation == ir_binop_add) {
+ if (try_emit_mad(ir, 1))
+ return;
+ if (try_emit_mad(ir, 0))
+ return;
+ }
+ if (try_emit_sat(ir))
+ return;
+
+ if (ir->operation == ir_quadop_vector)
+ assert(!"ir_quadop_vector should have been lowered");
+
+ for (operand = 0; operand < ir->get_num_operands(); operand++) {
+ this->result.file = PROGRAM_UNDEFINED;
+ ir->operands[operand]->accept(this);
+ if (this->result.file == PROGRAM_UNDEFINED) {
+ ir_print_visitor v;
+ printf("Failed to get tree for expression operand:\n");
+ ir->operands[operand]->accept(&v);
+ exit(1);
+ }
+ op[operand] = this->result;
+
+ /* Matrix expression operands should have been broken down to vector
+ * operations already.
+ */
+ assert(!ir->operands[operand]->type->is_matrix());
+ }
+
+ int vector_elements = ir->operands[0]->type->vector_elements;
+ if (ir->operands[1]) {
+ vector_elements = MAX2(vector_elements,
+ ir->operands[1]->type->vector_elements);
+ }
+
+ this->result.file = PROGRAM_UNDEFINED;
+
+ /* Storage for our result. Ideally for an assignment we'd be using
+ * the actual storage for the result here, instead.
+ */
+ result_src = get_temp(ir->type);
+ /* convenience for the emit functions below. */
+ result_dst = st_dst_reg(result_src);
+ /* Limit writes to the channels that will be used by result_src later.
+ * This does limit this temp's use as a temporary for multi-instruction
+ * sequences.
+ */
+ result_dst.writemask = (1 << ir->type->vector_elements) - 1;
+
+ switch (ir->operation) {
+ case ir_unop_logic_not:
+ emit(ir, TGSI_OPCODE_SEQ, result_dst, op[0], st_src_reg_for_type(result_dst.type, 0));
+ break;
+ case ir_unop_neg:
+ assert(result_dst.type == GLSL_TYPE_FLOAT || result_dst.type == GLSL_TYPE_INT);
+ if (result_dst.type == GLSL_TYPE_INT)
+ emit(ir, TGSI_OPCODE_INEG, result_dst, op[0]);
+ else {
+ op[0].negate = ~op[0].negate;
+ result_src = op[0];
+ }
+ break;
+ case ir_unop_abs:
+ assert(result_dst.type == GLSL_TYPE_FLOAT);
+ emit(ir, TGSI_OPCODE_ABS, result_dst, op[0]);
+ break;
+ case ir_unop_sign:
+ emit(ir, TGSI_OPCODE_SSG, result_dst, op[0]);
+ break;
+ case ir_unop_rcp:
+ emit_scalar(ir, TGSI_OPCODE_RCP, result_dst, op[0]);
+ break;
+
+ case ir_unop_exp2:
+ emit_scalar(ir, TGSI_OPCODE_EX2, result_dst, op[0]);
+ break;
+ case ir_unop_exp:
+ case ir_unop_log:
+ assert(!"not reached: should be handled by ir_explog_to_explog2");
+ break;
+ case ir_unop_log2:
+ emit_scalar(ir, TGSI_OPCODE_LG2, result_dst, op[0]);
+ break;
+ case ir_unop_sin:
+ emit_scalar(ir, TGSI_OPCODE_SIN, result_dst, op[0]);
+ break;
+ case ir_unop_cos:
+ emit_scalar(ir, TGSI_OPCODE_COS, result_dst, op[0]);
+ break;
+ case ir_unop_sin_reduced:
+ emit_scs(ir, TGSI_OPCODE_SIN, result_dst, op[0]);
+ break;
+ case ir_unop_cos_reduced:
+ emit_scs(ir, TGSI_OPCODE_COS, result_dst, op[0]);
+ break;
+
+ case ir_unop_dFdx:
+ emit(ir, TGSI_OPCODE_DDX, result_dst, op[0]);
+ break;
+ case ir_unop_dFdy:
+ op[0].negate = ~op[0].negate;
+ emit(ir, TGSI_OPCODE_DDY, result_dst, op[0]);
+ break;
+
+ case ir_unop_noise: {
+ /* At some point, a motivated person could add a better
+ * implementation of noise. Currently not even the nvidia
+ * binary drivers do anything more than this. In any case, the
+ * place to do this is in the GL state tracker, not the poor
+ * driver.
+ */
+ emit(ir, TGSI_OPCODE_MOV, result_dst, st_src_reg_for_float(0.5));
+ break;
+ }
+
+ case ir_binop_add:
+ emit(ir, TGSI_OPCODE_ADD, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_sub:
+ emit(ir, TGSI_OPCODE_SUB, result_dst, op[0], op[1]);
+ break;
+
+ case ir_binop_mul:
+ emit(ir, TGSI_OPCODE_MUL, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_div:
+ if (result_dst.type == GLSL_TYPE_FLOAT)
+ assert(!"not reached: should be handled by ir_div_to_mul_rcp");
+ else
+ emit(ir, TGSI_OPCODE_DIV, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_mod:
+ if (result_dst.type == GLSL_TYPE_FLOAT)
+ assert(!"ir_binop_mod should have been converted to b * fract(a/b)");
+ else
+ emit(ir, TGSI_OPCODE_MOD, result_dst, op[0], op[1]);
+ break;
+
+ case ir_binop_less:
+ emit(ir, TGSI_OPCODE_SLT, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_greater:
+ emit(ir, TGSI_OPCODE_SGT, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_lequal:
+ emit(ir, TGSI_OPCODE_SLE, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_gequal:
+ emit(ir, TGSI_OPCODE_SGE, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_equal:
+ emit(ir, TGSI_OPCODE_SEQ, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_nequal:
+ emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_all_equal:
+ /* "==" operator producing a scalar boolean. */
+ if (ir->operands[0]->type->is_vector() ||
+ ir->operands[1]->type->is_vector()) {
+ st_src_reg temp = get_temp(glsl_version >= 130 ?
+ glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) :
+ glsl_type::vec4_type);
+ assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+ emit(ir, TGSI_OPCODE_SNE, st_dst_reg(temp), op[0], op[1]);
+ emit_dp(ir, result_dst, temp, temp, vector_elements);
+ emit(ir, TGSI_OPCODE_SEQ, result_dst, result_src, st_src_reg_for_float(0.0));
+ } else {
+ emit(ir, TGSI_OPCODE_SEQ, result_dst, op[0], op[1]);
+ }
+ break;
+ case ir_binop_any_nequal:
+ /* "!=" operator producing a scalar boolean. */
+ if (ir->operands[0]->type->is_vector() ||
+ ir->operands[1]->type->is_vector()) {
+ st_src_reg temp = get_temp(glsl_version >= 130 ?
+ glsl_type::get_instance(ir->operands[0]->type->base_type, 4, 1) :
+ glsl_type::vec4_type);
+ assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
+ emit(ir, TGSI_OPCODE_SNE, st_dst_reg(temp), op[0], op[1]);
+ emit_dp(ir, result_dst, temp, temp, vector_elements);
+ emit(ir, TGSI_OPCODE_SNE, result_dst, result_src, st_src_reg_for_float(0.0));
+ } else {
+ emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]);
+ }
+ break;
+
+ case ir_unop_any:
+ assert(ir->operands[0]->type->is_vector());
+ emit_dp(ir, result_dst, op[0], op[0],
+ ir->operands[0]->type->vector_elements);
+ emit(ir, TGSI_OPCODE_SNE, result_dst, result_src, st_src_reg_for_float(0.0));
+ break;
+
+ case ir_binop_logic_xor:
+ emit(ir, TGSI_OPCODE_SNE, result_dst, op[0], op[1]);
+ break;
+
+ case ir_binop_logic_or:
+ /* This could be a saturated add and skip the SNE. */
+ emit(ir, TGSI_OPCODE_ADD, result_dst, op[0], op[1]);
+ emit(ir, TGSI_OPCODE_SNE, result_dst, result_src, st_src_reg_for_float(0.0));
+ break;
+
+ case ir_binop_logic_and:
+ /* the bool args are stored as float 0.0 or 1.0, so "mul" gives us "and". */
+ emit(ir, TGSI_OPCODE_MUL, result_dst, op[0], op[1]);
+ break;
+
+ case ir_binop_dot:
+ assert(ir->operands[0]->type->is_vector());
+ assert(ir->operands[0]->type == ir->operands[1]->type);
+ emit_dp(ir, result_dst, op[0], op[1],
+ ir->operands[0]->type->vector_elements);
+ break;
+
+ case ir_unop_sqrt:
+ /* sqrt(x) = x * rsq(x). */
+ emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]);
+ emit(ir, TGSI_OPCODE_MUL, result_dst, result_src, op[0]);
+ /* For incoming channels <= 0, set the result to 0. */
+ op[0].negate = ~op[0].negate;
+ emit(ir, TGSI_OPCODE_CMP, result_dst,
+ op[0], result_src, st_src_reg_for_float(0.0));
+ break;
+ case ir_unop_rsq:
+ emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]);
+ break;
+ case ir_unop_i2f:
+ case ir_unop_b2f:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_I2F, result_dst, op[0]);
+ break;
+ }
++ case ir_unop_i2u:
++ case ir_unop_u2i:
++ /* Converting between signed and unsigned integers is a no-op. */
+ case ir_unop_b2i:
+ /* Booleans are stored as integers (or floats in GLSL 1.20 and lower). */
+ result_src = op[0];
+ break;
+ case ir_unop_f2i:
+ if (glsl_version >= 130)
+ emit(ir, TGSI_OPCODE_F2I, result_dst, op[0]);
+ else
+ emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]);
+ break;
+ case ir_unop_f2b:
+ case ir_unop_i2b:
+ emit(ir, TGSI_OPCODE_SNE, result_dst, op[0],
+ st_src_reg_for_type(result_dst.type, 0));
+ break;
+ case ir_unop_trunc:
+ emit(ir, TGSI_OPCODE_TRUNC, result_dst, op[0]);
+ break;
+ case ir_unop_ceil:
+ op[0].negate = ~op[0].negate;
+ emit(ir, TGSI_OPCODE_FLR, result_dst, op[0]);
+ result_src.negate = ~result_src.negate;
+ break;
+ case ir_unop_floor:
+ emit(ir, TGSI_OPCODE_FLR, result_dst, op[0]);
+ break;
+ case ir_unop_fract:
+ emit(ir, TGSI_OPCODE_FRC, result_dst, op[0]);
+ break;
+
+ case ir_binop_min:
+ emit(ir, TGSI_OPCODE_MIN, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_max:
+ emit(ir, TGSI_OPCODE_MAX, result_dst, op[0], op[1]);
+ break;
+ case ir_binop_pow:
+ emit_scalar(ir, TGSI_OPCODE_POW, result_dst, op[0], op[1]);
+ break;
+
+ case ir_unop_bit_not:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_NOT, result_dst, op[0]);
+ break;
+ }
+ case ir_unop_u2f:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_U2F, result_dst, op[0]);
+ break;
+ }
+ case ir_binop_lshift:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_SHL, result_dst, op[0]);
+ break;
+ }
+ case ir_binop_rshift:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_ISHR, result_dst, op[0]);
+ break;
+ }
+ case ir_binop_bit_and:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_AND, result_dst, op[0]);
+ break;
+ }
+ case ir_binop_bit_xor:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_XOR, result_dst, op[0]);
+ break;
+ }
+ case ir_binop_bit_or:
+ if (glsl_version >= 130) {
+ emit(ir, TGSI_OPCODE_OR, result_dst, op[0]);
+ break;
+ }
+ case ir_unop_round_even:
+ assert(!"GLSL 1.30 features unsupported");
+ break;
+
+ case ir_quadop_vector:
+ /* This operation should have already been handled.
+ */
+ assert(!"Should not get here.");
+ break;
+ }
+
+ this->result = result_src;
+ }
+
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_swizzle *ir)
+ {
+ st_src_reg src;
+ int i;
+ int swizzle[4];
+
+ /* Note that this is only swizzles in expressions, not those on the left
+ * hand side of an assignment, which do write masking. See ir_assignment
+ * for that.
+ */
+
+ ir->val->accept(this);
+ src = this->result;
+ assert(src.file != PROGRAM_UNDEFINED);
+
+ for (i = 0; i < 4; i++) {
+ if (i < ir->type->vector_elements) {
+ switch (i) {
+ case 0:
+ swizzle[i] = GET_SWZ(src.swizzle, ir->mask.x);
+ break;
+ case 1:
+ swizzle[i] = GET_SWZ(src.swizzle, ir->mask.y);
+ break;
+ case 2:
+ swizzle[i] = GET_SWZ(src.swizzle, ir->mask.z);
+ break;
+ case 3:
+ swizzle[i] = GET_SWZ(src.swizzle, ir->mask.w);
+ break;
+ }
+ } else {
+ /* If the type is smaller than a vec4, replicate the last
+ * channel out.
+ */
+ swizzle[i] = swizzle[ir->type->vector_elements - 1];
+ }
+ }
+
+ src.swizzle = MAKE_SWIZZLE4(swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
+
+ this->result = src;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_dereference_variable *ir)
+ {
+ variable_storage *entry = find_variable_storage(ir->var);
+ ir_variable *var = ir->var;
+
+ if (!entry) {
+ switch (var->mode) {
+ case ir_var_uniform:
+ entry = new(mem_ctx) variable_storage(var, PROGRAM_UNIFORM,
+ var->location);
+ this->variables.push_tail(entry);
+ break;
+ case ir_var_in:
+ case ir_var_inout:
+ /* The linker assigns locations for varyings and attributes,
+ * including deprecated builtins (like gl_Color), user-assign
+ * generic attributes (glBindVertexLocation), and
+ * user-defined varyings.
+ *
+ * FINISHME: We would hit this path for function arguments. Fix!
+ */
+ assert(var->location != -1);
+ entry = new(mem_ctx) variable_storage(var,
+ PROGRAM_INPUT,
+ var->location);
+ if (this->prog->Target == GL_VERTEX_PROGRAM_ARB &&
+ var->location >= VERT_ATTRIB_GENERIC0) {
+ _mesa_add_attribute(this->prog->Attributes,
+ var->name,
+ _mesa_sizeof_glsl_type(var->type->gl_type),
+ var->type->gl_type,
+ var->location - VERT_ATTRIB_GENERIC0);
+ }
+ break;
+ case ir_var_out:
+ assert(var->location != -1);
+ entry = new(mem_ctx) variable_storage(var,
+ PROGRAM_OUTPUT,
+ var->location);
+ break;
+ case ir_var_system_value:
+ entry = new(mem_ctx) variable_storage(var,
+ PROGRAM_SYSTEM_VALUE,
+ var->location);
+ break;
+ case ir_var_auto:
+ case ir_var_temporary:
+ entry = new(mem_ctx) variable_storage(var, PROGRAM_TEMPORARY,
+ this->next_temp);
+ this->variables.push_tail(entry);
+
+ next_temp += type_size(var->type);
+ break;
+ }
+
+ if (!entry) {
+ printf("Failed to make storage for %s\n", var->name);
+ exit(1);
+ }
+ }
+
+ this->result = st_src_reg(entry->file, entry->index, var->type);
+ if (glsl_version <= 120)
+ this->result.type = GLSL_TYPE_FLOAT;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_dereference_array *ir)
+ {
+ ir_constant *index;
+ st_src_reg src;
+ int element_size = type_size(ir->type);
+
+ index = ir->array_index->constant_expression_value();
+
+ ir->array->accept(this);
+ src = this->result;
+
+ if (index) {
+ src.index += index->value.i[0] * element_size;
+ } else {
+ st_src_reg array_base = this->result;
+ /* Variable index array dereference. It eats the "vec4" of the
+ * base of the array and an index that offsets the TGSI register
+ * index.
+ */
+ ir->array_index->accept(this);
+
+ st_src_reg index_reg;
+
+ if (element_size == 1) {
+ index_reg = this->result;
+ } else {
+ index_reg = get_temp(glsl_type::float_type);
+
+ emit(ir, TGSI_OPCODE_MUL, st_dst_reg(index_reg),
+ this->result, st_src_reg_for_float(element_size));
+ }
+
+ /* If there was already a relative address register involved, add the
+ * new and the old together to get the new offset.
+ */
+ if (src.reladdr != NULL) {
+ st_src_reg accum_reg = get_temp(glsl_type::float_type);
+
+ emit(ir, TGSI_OPCODE_ADD, st_dst_reg(accum_reg),
+ index_reg, *src.reladdr);
+
+ index_reg = accum_reg;
+ }
+
+ src.reladdr = ralloc(mem_ctx, st_src_reg);
+ memcpy(src.reladdr, &index_reg, sizeof(index_reg));
+ }
+
+ /* If the type is smaller than a vec4, replicate the last channel out. */
+ if (ir->type->is_scalar() || ir->type->is_vector())
+ src.swizzle = swizzle_for_size(ir->type->vector_elements);
+ else
+ src.swizzle = SWIZZLE_NOOP;
+
+ this->result = src;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_dereference_record *ir)
+ {
+ unsigned int i;
+ const glsl_type *struct_type = ir->record->type;
+ int offset = 0;
+
+ ir->record->accept(this);
+
+ for (i = 0; i < struct_type->length; i++) {
+ if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0)
+ break;
+ offset += type_size(struct_type->fields.structure[i].type);
+ }
+
+ /* If the type is smaller than a vec4, replicate the last channel out. */
+ if (ir->type->is_scalar() || ir->type->is_vector())
+ this->result.swizzle = swizzle_for_size(ir->type->vector_elements);
+ else
+ this->result.swizzle = SWIZZLE_NOOP;
+
+ this->result.index += offset;
+ }
+
+ /**
+ * We want to be careful in assignment setup to hit the actual storage
+ * instead of potentially using a temporary like we might with the
+ * ir_dereference handler.
+ */
+ static st_dst_reg
+ get_assignment_lhs(ir_dereference *ir, glsl_to_tgsi_visitor *v)
+ {
+ /* The LHS must be a dereference. If the LHS is a variable indexed array
+ * access of a vector, it must be separated into a series conditional moves
+ * before reaching this point (see ir_vec_index_to_cond_assign).
+ */
+ assert(ir->as_dereference());
+ ir_dereference_array *deref_array = ir->as_dereference_array();
+ if (deref_array) {
+ assert(!deref_array->array->type->is_vector());
+ }
+
+ /* Use the rvalue deref handler for the most part. We'll ignore
+ * swizzles in it and write swizzles using writemask, though.
+ */
+ ir->accept(v);
+ return st_dst_reg(v->result);
+ }
+
+ /**
+ * Process the condition of a conditional assignment
+ *
+ * Examines the condition of a conditional assignment to generate the optimal
+ * first operand of a \c CMP instruction. If the condition is a relational
+ * operator with 0 (e.g., \c ir_binop_less), the value being compared will be
+ * used as the source for the \c CMP instruction. Otherwise the comparison
+ * is processed to a boolean result, and the boolean result is used as the
+ * operand to the CMP instruction.
+ */
+ bool
+ glsl_to_tgsi_visitor::process_move_condition(ir_rvalue *ir)
+ {
+ ir_rvalue *src_ir = ir;
+ bool negate = true;
+ bool switch_order = false;
+
+ ir_expression *const expr = ir->as_expression();
+ if ((expr != NULL) && (expr->get_num_operands() == 2)) {
+ bool zero_on_left = false;
+
+ if (expr->operands[0]->is_zero()) {
+ src_ir = expr->operands[1];
+ zero_on_left = true;
+ } else if (expr->operands[1]->is_zero()) {
+ src_ir = expr->operands[0];
+ zero_on_left = false;
+ }
+
+ /* a is - 0 + - 0 +
+ * (a < 0) T F F ( a < 0) T F F
+ * (0 < a) F F T (-a < 0) F F T
+ * (a <= 0) T T F (-a < 0) F F T (swap order of other operands)
+ * (0 <= a) F T T ( a < 0) T F F (swap order of other operands)
+ * (a > 0) F F T (-a < 0) F F T
+ * (0 > a) T F F ( a < 0) T F F
+ * (a >= 0) F T T ( a < 0) T F F (swap order of other operands)
+ * (0 >= a) T T F (-a < 0) F F T (swap order of other operands)
+ *
+ * Note that exchanging the order of 0 and 'a' in the comparison simply
+ * means that the value of 'a' should be negated.
+ */
+ if (src_ir != ir) {
+ switch (expr->operation) {
+ case ir_binop_less:
+ switch_order = false;
+ negate = zero_on_left;
+ break;
+
+ case ir_binop_greater:
+ switch_order = false;
+ negate = !zero_on_left;
+ break;
+
+ case ir_binop_lequal:
+ switch_order = true;
+ negate = !zero_on_left;
+ break;
+
+ case ir_binop_gequal:
+ switch_order = true;
+ negate = zero_on_left;
+ break;
+
+ default:
+ /* This isn't the right kind of comparison afterall, so make sure
+ * the whole condition is visited.
+ */
+ src_ir = ir;
+ break;
+ }
+ }
+ }
+
+ src_ir->accept(this);
+
+ /* We use the TGSI_OPCODE_CMP (a < 0 ? b : c) for conditional moves, and the
+ * condition we produced is 0.0 or 1.0. By flipping the sign, we can
+ * choose which value TGSI_OPCODE_CMP produces without an extra instruction
+ * computing the condition.
+ */
+ if (negate)
+ this->result.negate = ~this->result.negate;
+
+ return switch_order;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_assignment *ir)
+ {
+ st_dst_reg l;
+ st_src_reg r;
+ int i;
+
+ ir->rhs->accept(this);
+ r = this->result;
+
+ l = get_assignment_lhs(ir->lhs, this);
+
+ /* FINISHME: This should really set to the correct maximal writemask for each
+ * FINISHME: component written (in the loops below). This case can only
+ * FINISHME: occur for matrices, arrays, and structures.
+ */
+ if (ir->write_mask == 0) {
+ assert(!ir->lhs->type->is_scalar() && !ir->lhs->type->is_vector());
+ l.writemask = WRITEMASK_XYZW;
+ } else if (ir->lhs->type->is_scalar() &&
+ ir->lhs->variable_referenced()->mode == ir_var_out) {
+ /* FINISHME: This hack makes writing to gl_FragDepth, which lives in the
+ * FINISHME: W component of fragment shader output zero, work correctly.
+ */
+ l.writemask = WRITEMASK_XYZW;
+ } else {
+ int swizzles[4];
+ int first_enabled_chan = 0;
+ int rhs_chan = 0;
+
+ l.writemask = ir->write_mask;
+
+ for (int i = 0; i < 4; i++) {
+ if (l.writemask & (1 << i)) {
+ first_enabled_chan = GET_SWZ(r.swizzle, i);
+ break;
+ }
+ }
+
+ /* Swizzle a small RHS vector into the channels being written.
+ *
+ * glsl ir treats write_mask as dictating how many channels are
+ * present on the RHS while TGSI treats write_mask as just
+ * showing which channels of the vec4 RHS get written.
+ */
+ for (int i = 0; i < 4; i++) {
+ if (l.writemask & (1 << i))
+ swizzles[i] = GET_SWZ(r.swizzle, rhs_chan++);
+ else
+ swizzles[i] = first_enabled_chan;
+ }
+ r.swizzle = MAKE_SWIZZLE4(swizzles[0], swizzles[1],
+ swizzles[2], swizzles[3]);
+ }
+
+ assert(l.file != PROGRAM_UNDEFINED);
+ assert(r.file != PROGRAM_UNDEFINED);
+
+ if (ir->condition) {
+ const bool switch_order = this->process_move_condition(ir->condition);
+ st_src_reg condition = this->result;
+
+ for (i = 0; i < type_size(ir->lhs->type); i++) {
+ st_src_reg l_src = st_src_reg(l);
+ l_src.swizzle = swizzle_for_size(ir->lhs->type->vector_elements);
+
+ if (switch_order) {
+ emit(ir, TGSI_OPCODE_CMP, l, condition, l_src, r);
+ } else {
+ emit(ir, TGSI_OPCODE_CMP, l, condition, r, l_src);
+ }
+
+ l.index++;
+ r.index++;
+ }
+ } else if (ir->rhs->as_expression() &&
+ this->instructions.get_tail() &&
+ ir->rhs == ((glsl_to_tgsi_instruction *)this->instructions.get_tail())->ir &&
+ type_size(ir->lhs->type) == 1) {
+ /* To avoid emitting an extra MOV when assigning an expression to a
+ * variable, emit the last instruction of the expression again, but
+ * replace the destination register with the target of the assignment.
+ * Dead code elimination will remove the original instruction.
+ */
+ glsl_to_tgsi_instruction *inst;
+ inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail();
+ emit(ir, inst->op, l, inst->src[0], inst->src[1], inst->src[2]);
+ } else {
+ for (i = 0; i < type_size(ir->lhs->type); i++) {
+ emit(ir, TGSI_OPCODE_MOV, l, r);
+ l.index++;
+ r.index++;
+ }
+ }
+ }
+
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_constant *ir)
+ {
+ st_src_reg src;
+ GLfloat stack_vals[4] = { 0 };
+ gl_constant_value *values = (gl_constant_value *) stack_vals;
+ GLenum gl_type = GL_NONE;
+ unsigned int i;
+ static int in_array = 0;
+ gl_register_file file = in_array ? PROGRAM_CONSTANT : PROGRAM_IMMEDIATE;
+
+ /* Unfortunately, 4 floats is all we can get into
+ * _mesa_add_typed_unnamed_constant. So, make a temp to store an
+ * aggregate constant and move each constant value into it. If we
+ * get lucky, copy propagation will eliminate the extra moves.
+ */
+ if (ir->type->base_type == GLSL_TYPE_STRUCT) {
+ st_src_reg temp_base = get_temp(ir->type);
+ st_dst_reg temp = st_dst_reg(temp_base);
+
+ foreach_iter(exec_list_iterator, iter, ir->components) {
+ ir_constant *field_value = (ir_constant *)iter.get();
+ int size = type_size(field_value->type);
+
+ assert(size > 0);
+
+ field_value->accept(this);
+ src = this->result;
+
+ for (i = 0; i < (unsigned int)size; i++) {
+ emit(ir, TGSI_OPCODE_MOV, temp, src);
+
+ src.index++;
+ temp.index++;
+ }
+ }
+ this->result = temp_base;
+ return;
+ }
+
+ if (ir->type->is_array()) {
+ st_src_reg temp_base = get_temp(ir->type);
+ st_dst_reg temp = st_dst_reg(temp_base);
+ int size = type_size(ir->type->fields.array);
+
+ assert(size > 0);
+ in_array++;
+
+ for (i = 0; i < ir->type->length; i++) {
+ ir->array_elements[i]->accept(this);
+ src = this->result;
+ for (int j = 0; j < size; j++) {
+ emit(ir, TGSI_OPCODE_MOV, temp, src);
+
+ src.index++;
+ temp.index++;
+ }
+ }
+ this->result = temp_base;
+ in_array--;
+ return;
+ }
+
+ if (ir->type->is_matrix()) {
+ st_src_reg mat = get_temp(ir->type);
+ st_dst_reg mat_column = st_dst_reg(mat);
+
+ for (i = 0; i < ir->type->matrix_columns; i++) {
+ assert(ir->type->base_type == GLSL_TYPE_FLOAT);
+ values = (gl_constant_value *) &ir->value.f[i * ir->type->vector_elements];
+
+ src = st_src_reg(file, -1, ir->type->base_type);
+ src.index = add_constant(file,
+ values,
+ ir->type->vector_elements,
+ GL_FLOAT,
+ &src.swizzle);
+ emit(ir, TGSI_OPCODE_MOV, mat_column, src);
+
+ mat_column.index++;
+ }
+
+ this->result = mat;
+ return;
+ }
+
+ switch (ir->type->base_type) {
+ case GLSL_TYPE_FLOAT:
+ gl_type = GL_FLOAT;
+ for (i = 0; i < ir->type->vector_elements; i++) {
+ values[i].f = ir->value.f[i];
+ }
+ break;
+ case GLSL_TYPE_UINT:
+ gl_type = glsl_version >= 130 ? GL_UNSIGNED_INT : GL_FLOAT;
+ for (i = 0; i < ir->type->vector_elements; i++) {
+ if (glsl_version >= 130)
+ values[i].u = ir->value.u[i];
+ else
+ values[i].f = ir->value.u[i];
+ }
+ break;
+ case GLSL_TYPE_INT:
+ gl_type = glsl_version >= 130 ? GL_INT : GL_FLOAT;
+ for (i = 0; i < ir->type->vector_elements; i++) {
+ if (glsl_version >= 130)
+ values[i].i = ir->value.i[i];
+ else
+ values[i].f = ir->value.i[i];
+ }
+ break;
+ case GLSL_TYPE_BOOL:
+ gl_type = glsl_version >= 130 ? GL_BOOL : GL_FLOAT;
+ for (i = 0; i < ir->type->vector_elements; i++) {
+ if (glsl_version >= 130)
+ values[i].b = ir->value.b[i];
+ else
+ values[i].f = ir->value.b[i];
+ }
+ break;
+ default:
+ assert(!"Non-float/uint/int/bool constant");
+ }
+
+ this->result = st_src_reg(file, -1, ir->type);
+ this->result.index = add_constant(file,
+ values,
+ ir->type->vector_elements,
+ gl_type,
+ &this->result.swizzle);
+ }
+
+ function_entry *
+ glsl_to_tgsi_visitor::get_function_signature(ir_function_signature *sig)
+ {
+ function_entry *entry;
+
+ foreach_iter(exec_list_iterator, iter, this->function_signatures) {
+ entry = (function_entry *)iter.get();
+
+ if (entry->sig == sig)
+ return entry;
+ }
+
+ entry = ralloc(mem_ctx, function_entry);
+ entry->sig = sig;
+ entry->sig_id = this->next_signature_id++;
+ entry->bgn_inst = NULL;
+
+ /* Allocate storage for all the parameters. */
+ foreach_iter(exec_list_iterator, iter, sig->parameters) {
+ ir_variable *param = (ir_variable *)iter.get();
+ variable_storage *storage;
+
+ storage = find_variable_storage(param);
+ assert(!storage);
+
+ storage = new(mem_ctx) variable_storage(param, PROGRAM_TEMPORARY,
+ this->next_temp);
+ this->variables.push_tail(storage);
+
+ this->next_temp += type_size(param->type);
+ }
+
+ if (!sig->return_type->is_void()) {
+ entry->return_reg = get_temp(sig->return_type);
+ } else {
+ entry->return_reg = undef_src;
+ }
+
+ this->function_signatures.push_tail(entry);
+ return entry;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_call *ir)
+ {
+ glsl_to_tgsi_instruction *call_inst;
+ ir_function_signature *sig = ir->get_callee();
+ function_entry *entry = get_function_signature(sig);
+ int i;
+
+ /* Process in parameters. */
+ exec_list_iterator sig_iter = sig->parameters.iterator();
+ foreach_iter(exec_list_iterator, iter, *ir) {
+ ir_rvalue *param_rval = (ir_rvalue *)iter.get();
+ ir_variable *param = (ir_variable *)sig_iter.get();
+
+ if (param->mode == ir_var_in ||
+ param->mode == ir_var_inout) {
+ variable_storage *storage = find_variable_storage(param);
+ assert(storage);
+
+ param_rval->accept(this);
+ st_src_reg r = this->result;
+
+ st_dst_reg l;
+ l.file = storage->file;
+ l.index = storage->index;
+ l.reladdr = NULL;
+ l.writemask = WRITEMASK_XYZW;
+ l.cond_mask = COND_TR;
+
+ for (i = 0; i < type_size(param->type); i++) {
+ emit(ir, TGSI_OPCODE_MOV, l, r);
+ l.index++;
+ r.index++;
+ }
+ }
+
+ sig_iter.next();
+ }
+ assert(!sig_iter.has_next());
+
+ /* Emit call instruction */
+ call_inst = emit(ir, TGSI_OPCODE_CAL);
+ call_inst->function = entry;
+
+ /* Process out parameters. */
+ sig_iter = sig->parameters.iterator();
+ foreach_iter(exec_list_iterator, iter, *ir) {
+ ir_rvalue *param_rval = (ir_rvalue *)iter.get();
+ ir_variable *param = (ir_variable *)sig_iter.get();
+
+ if (param->mode == ir_var_out ||
+ param->mode == ir_var_inout) {
+ variable_storage *storage = find_variable_storage(param);
+ assert(storage);
+
+ st_src_reg r;
+ r.file = storage->file;
+ r.index = storage->index;
+ r.reladdr = NULL;
+ r.swizzle = SWIZZLE_NOOP;
+ r.negate = 0;
+
+ param_rval->accept(this);
+ st_dst_reg l = st_dst_reg(this->result);
+
+ for (i = 0; i < type_size(param->type); i++) {
+ emit(ir, TGSI_OPCODE_MOV, l, r);
+ l.index++;
+ r.index++;
+ }
+ }
+
+ sig_iter.next();
+ }
+ assert(!sig_iter.has_next());
+
+ /* Process return value. */
+ this->result = entry->return_reg;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_texture *ir)
+ {
+ st_src_reg result_src, coord, lod_info, projector, dx, dy;
+ st_dst_reg result_dst, coord_dst;
+ glsl_to_tgsi_instruction *inst = NULL;
+ unsigned opcode = TGSI_OPCODE_NOP;
+
+ ir->coordinate->accept(this);
+
+ /* Put our coords in a temp. We'll need to modify them for shadow,
+ * projection, or LOD, so the only case we'd use it as is is if
+ * we're doing plain old texturing. The optimization passes on
+ * glsl_to_tgsi_visitor should handle cleaning up our mess in that case.
+ */
+ coord = get_temp(glsl_type::vec4_type);
+ coord_dst = st_dst_reg(coord);
+ emit(ir, TGSI_OPCODE_MOV, coord_dst, this->result);
+
+ if (ir->projector) {
+ ir->projector->accept(this);
+ projector = this->result;
+ }
+
+ /* Storage for our result. Ideally for an assignment we'd be using
+ * the actual storage for the result here, instead.
+ */
+ result_src = get_temp(glsl_type::vec4_type);
+ result_dst = st_dst_reg(result_src);
+
+ switch (ir->op) {
+ case ir_tex:
+ opcode = TGSI_OPCODE_TEX;
+ break;
+ case ir_txb:
+ opcode = TGSI_OPCODE_TXB;
+ ir->lod_info.bias->accept(this);
+ lod_info = this->result;
+ break;
+ case ir_txl:
+ opcode = TGSI_OPCODE_TXL;
+ ir->lod_info.lod->accept(this);
+ lod_info = this->result;
+ break;
+ case ir_txd:
+ opcode = TGSI_OPCODE_TXD;
+ ir->lod_info.grad.dPdx->accept(this);
+ dx = this->result;
+ ir->lod_info.grad.dPdy->accept(this);
+ dy = this->result;
+ break;
+ case ir_txf: /* TODO: use TGSI_OPCODE_TXF here */
+ assert(!"GLSL 1.30 features unsupported");
+ break;
+ }
+
+ if (ir->projector) {
+ if (opcode == TGSI_OPCODE_TEX) {
+ /* Slot the projector in as the last component of the coord. */
+ coord_dst.writemask = WRITEMASK_W;
+ emit(ir, TGSI_OPCODE_MOV, coord_dst, projector);
+ coord_dst.writemask = WRITEMASK_XYZW;
+ opcode = TGSI_OPCODE_TXP;
+ } else {
+ st_src_reg coord_w = coord;
+ coord_w.swizzle = SWIZZLE_WWWW;
+
+ /* For the other TEX opcodes there's no projective version
+ * since the last slot is taken up by LOD info. Do the
+ * projective divide now.
+ */
+ coord_dst.writemask = WRITEMASK_W;
+ emit(ir, TGSI_OPCODE_RCP, coord_dst, projector);
+
+ /* In the case where we have to project the coordinates "by hand,"
+ * the shadow comparator value must also be projected.
+ */
+ st_src_reg tmp_src = coord;
+ if (ir->shadow_comparitor) {
+ /* Slot the shadow value in as the second to last component of the
+ * coord.
+ */
+ ir->shadow_comparitor->accept(this);
+
+ tmp_src = get_temp(glsl_type::vec4_type);
+ st_dst_reg tmp_dst = st_dst_reg(tmp_src);
+
+ tmp_dst.writemask = WRITEMASK_Z;
+ emit(ir, TGSI_OPCODE_MOV, tmp_dst, this->result);
+
+ tmp_dst.writemask = WRITEMASK_XY;
+ emit(ir, TGSI_OPCODE_MOV, tmp_dst, coord);
+ }
+
+ coord_dst.writemask = WRITEMASK_XYZ;
+ emit(ir, TGSI_OPCODE_MUL, coord_dst, tmp_src, coord_w);
+
+ coord_dst.writemask = WRITEMASK_XYZW;
+ coord.swizzle = SWIZZLE_XYZW;
+ }
+ }
+
+ /* If projection is done and the opcode is not TGSI_OPCODE_TXP, then the shadow
+ * comparator was put in the correct place (and projected) by the code,
+ * above, that handles by-hand projection.
+ */
+ if (ir->shadow_comparitor && (!ir->projector || opcode == TGSI_OPCODE_TXP)) {
+ /* Slot the shadow value in as the second to last component of the
+ * coord.
+ */
+ ir->shadow_comparitor->accept(this);
+ coord_dst.writemask = WRITEMASK_Z;
+ emit(ir, TGSI_OPCODE_MOV, coord_dst, this->result);
+ coord_dst.writemask = WRITEMASK_XYZW;
+ }
+
+ if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXB) {
+ /* TGSI stores LOD or LOD bias in the last channel of the coords. */
+ coord_dst.writemask = WRITEMASK_W;
+ emit(ir, TGSI_OPCODE_MOV, coord_dst, lod_info);
+ coord_dst.writemask = WRITEMASK_XYZW;
+ }
+
+ if (opcode == TGSI_OPCODE_TXD)
+ inst = emit(ir, opcode, result_dst, coord, dx, dy);
+ else
+ inst = emit(ir, opcode, result_dst, coord);
+
+ if (ir->shadow_comparitor)
+ inst->tex_shadow = GL_TRUE;
+
+ inst->sampler = _mesa_get_sampler_uniform_value(ir->sampler,
+ this->shader_program,
+ this->prog);
+
+ const glsl_type *sampler_type = ir->sampler->type;
+
+ switch (sampler_type->sampler_dimensionality) {
+ case GLSL_SAMPLER_DIM_1D:
+ inst->tex_target = (sampler_type->sampler_array)
+ ? TEXTURE_1D_ARRAY_INDEX : TEXTURE_1D_INDEX;
+ break;
+ case GLSL_SAMPLER_DIM_2D:
+ inst->tex_target = (sampler_type->sampler_array)
+ ? TEXTURE_2D_ARRAY_INDEX : TEXTURE_2D_INDEX;
+ break;
+ case GLSL_SAMPLER_DIM_3D:
+ inst->tex_target = TEXTURE_3D_INDEX;
+ break;
+ case GLSL_SAMPLER_DIM_CUBE:
+ inst->tex_target = TEXTURE_CUBE_INDEX;
+ break;
+ case GLSL_SAMPLER_DIM_RECT:
+ inst->tex_target = TEXTURE_RECT_INDEX;
+ break;
+ case GLSL_SAMPLER_DIM_BUF:
+ assert(!"FINISHME: Implement ARB_texture_buffer_object");
+ break;
+ default:
+ assert(!"Should not get here.");
+ }
+
+ this->result = result_src;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_return *ir)
+ {
+ if (ir->get_value()) {
+ st_dst_reg l;
+ int i;
+
+ assert(current_function);
+
+ ir->get_value()->accept(this);
+ st_src_reg r = this->result;
+
+ l = st_dst_reg(current_function->return_reg);
+
+ for (i = 0; i < type_size(current_function->sig->return_type); i++) {
+ emit(ir, TGSI_OPCODE_MOV, l, r);
+ l.index++;
+ r.index++;
+ }
+ }
+
+ emit(ir, TGSI_OPCODE_RET);
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_discard *ir)
+ {
+ struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
+
+ if (ir->condition) {
+ ir->condition->accept(this);
+ this->result.negate = ~this->result.negate;
+ emit(ir, TGSI_OPCODE_KIL, undef_dst, this->result);
+ } else {
+ emit(ir, TGSI_OPCODE_KILP);
+ }
+
+ fp->UsesKill = GL_TRUE;
+ }
+
+ void
+ glsl_to_tgsi_visitor::visit(ir_if *ir)
+ {
+ glsl_to_tgsi_instruction *cond_inst, *if_inst, *else_inst = NULL;
+ glsl_to_tgsi_instruction *prev_inst;
+
+ prev_inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail();
+
+ ir->condition->accept(this);
+ assert(this->result.file != PROGRAM_UNDEFINED);
+
+ if (this->options->EmitCondCodes) {
+ cond_inst = (glsl_to_tgsi_instruction *)this->instructions.get_tail();
+
+ /* See if we actually generated any instruction for generating
+ * the condition. If not, then cook up a move to a temp so we
+ * have something to set cond_update on.
+ */
+ if (cond_inst == prev_inst) {
+ st_src_reg temp = get_temp(glsl_type::bool_type);
+ cond_inst = emit(ir->condition, TGSI_OPCODE_MOV, st_dst_reg(temp), result);
+ }
+ cond_inst->cond_update = GL_TRUE;
+
+ if_inst = emit(ir->condition, TGSI_OPCODE_IF);
+ if_inst->dst.cond_mask = COND_NE;
+ } else {
+ if_inst = emit(ir->condition, TGSI_OPCODE_IF, undef_dst, this->result);
+ }
+
+ this->instructions.push_tail(if_inst);
+
+ visit_exec_list(&ir->then_instructions, this);
+
+ if (!ir->else_instructions.is_empty()) {
+ else_inst = emit(ir->condition, TGSI_OPCODE_ELSE);
+ visit_exec_list(&ir->else_instructions, this);
+ }
+
+ if_inst = emit(ir->condition, TGSI_OPCODE_ENDIF);
+ }
+
+ glsl_to_tgsi_visitor::glsl_to_tgsi_visitor()
+ {
+ result.file = PROGRAM_UNDEFINED;
+ next_temp = 1;
+ next_signature_id = 1;
+ num_immediates = 0;
+ current_function = NULL;
+ num_address_regs = 0;
+ indirect_addr_temps = false;
+ indirect_addr_consts = false;
+ mem_ctx = ralloc_context(NULL);
+ }
+
+ glsl_to_tgsi_visitor::~glsl_to_tgsi_visitor()
+ {
+ ralloc_free(mem_ctx);
+ }
+
+ extern "C" void free_glsl_to_tgsi_visitor(glsl_to_tgsi_visitor *v)
+ {
+ delete v;
+ }
+
+
+ /**
+ * Count resources used by the given gpu program (number of texture
+ * samplers, etc).
+ */
+ static void
+ count_resources(glsl_to_tgsi_visitor *v, gl_program *prog)
+ {
+ v->samplers_used = 0;
+
+ foreach_iter(exec_list_iterator, iter, v->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ if (is_tex_instruction(inst->op)) {
+ v->samplers_used |= 1 << inst->sampler;
+
+ prog->SamplerTargets[inst->sampler] =
+ (gl_texture_index)inst->tex_target;
+ if (inst->tex_shadow) {
+ prog->ShadowSamplers |= 1 << inst->sampler;
+ }
+ }
+ }
+
+ prog->SamplersUsed = v->samplers_used;
+ _mesa_update_shader_textures_used(prog);
+ }
+
+
+ /**
+ * Check if the given vertex/fragment/shader program is within the
+ * resource limits of the context (number of texture units, etc).
+ * If any of those checks fail, record a linker error.
+ *
+ * XXX more checks are needed...
+ */
+ static void
+ check_resources(const struct gl_context *ctx,
+ struct gl_shader_program *shader_program,
+ glsl_to_tgsi_visitor *prog,
+ struct gl_program *proginfo)
+ {
+ switch (proginfo->Target) {
+ case GL_VERTEX_PROGRAM_ARB:
+ if (_mesa_bitcount(prog->samplers_used) >
+ ctx->Const.MaxVertexTextureImageUnits) {
+ fail_link(shader_program, "Too many vertex shader texture samplers");
+ }
+ if (proginfo->Parameters->NumParameters > MAX_UNIFORMS) {
+ fail_link(shader_program, "Too many vertex shader constants");
+ }
+ break;
+ case MESA_GEOMETRY_PROGRAM:
+ if (_mesa_bitcount(prog->samplers_used) >
+ ctx->Const.MaxGeometryTextureImageUnits) {
+ fail_link(shader_program, "Too many geometry shader texture samplers");
+ }
+ if (proginfo->Parameters->NumParameters >
+ MAX_GEOMETRY_UNIFORM_COMPONENTS / 4) {
+ fail_link(shader_program, "Too many geometry shader constants");
+ }
+ break;
+ case GL_FRAGMENT_PROGRAM_ARB:
+ if (_mesa_bitcount(prog->samplers_used) >
+ ctx->Const.MaxTextureImageUnits) {
+ fail_link(shader_program, "Too many fragment shader texture samplers");
+ }
+ if (proginfo->Parameters->NumParameters > MAX_UNIFORMS) {
+ fail_link(shader_program, "Too many fragment shader constants");
+ }
+ break;
+ default:
+ _mesa_problem(ctx, "unexpected program type in check_resources()");
+ }
+ }
+
+
+
+ struct uniform_sort {
+ struct gl_uniform *u;
+ int pos;
+ };
+
+ /* The shader_program->Uniforms list is almost sorted in increasing
+ * uniform->{Frag,Vert}Pos locations, but not quite when there are
+ * uniforms shared between targets. We need to add parameters in
+ * increasing order for the targets.
+ */
+ static int
+ sort_uniforms(const void *a, const void *b)
+ {
+ struct uniform_sort *u1 = (struct uniform_sort *)a;
+ struct uniform_sort *u2 = (struct uniform_sort *)b;
+
+ return u1->pos - u2->pos;
+ }
+
+ /* Add the uniforms to the parameters. The linker chose locations
+ * in our parameters lists (which weren't created yet), which the
+ * uniforms code will use to poke values into our parameters list
+ * when uniforms are updated.
+ */
+ static void
+ add_uniforms_to_parameters_list(struct gl_shader_program *shader_program,
+ struct gl_shader *shader,
+ struct gl_program *prog)
+ {
+ unsigned int i;
+ unsigned int next_sampler = 0, num_uniforms = 0;
+ struct uniform_sort *sorted_uniforms;
+
+ sorted_uniforms = ralloc_array(NULL, struct uniform_sort,
+ shader_program->Uniforms->NumUniforms);
+
+ for (i = 0; i < shader_program->Uniforms->NumUniforms; i++) {
+ struct gl_uniform *uniform = shader_program->Uniforms->Uniforms + i;
+ int parameter_index = -1;
+
+ switch (shader->Type) {
+ case GL_VERTEX_SHADER:
+ parameter_index = uniform->VertPos;
+ break;
+ case GL_FRAGMENT_SHADER:
+ parameter_index = uniform->FragPos;
+ break;
+ case GL_GEOMETRY_SHADER:
+ parameter_index = uniform->GeomPos;
+ break;
+ }
+
+ /* Only add uniforms used in our target. */
+ if (parameter_index != -1) {
+ sorted_uniforms[num_uniforms].pos = parameter_index;
+ sorted_uniforms[num_uniforms].u = uniform;
+ num_uniforms++;
+ }
+ }
+
+ qsort(sorted_uniforms, num_uniforms, sizeof(struct uniform_sort),
+ sort_uniforms);
+
+ for (i = 0; i < num_uniforms; i++) {
+ struct gl_uniform *uniform = sorted_uniforms[i].u;
+ int parameter_index = sorted_uniforms[i].pos;
+ const glsl_type *type = uniform->Type;
+ unsigned int size;
+
+ if (type->is_vector() ||
+ type->is_scalar()) {
+ size = type->vector_elements;
+ } else {
+ size = type_size(type) * 4;
+ }
+
+ gl_register_file file;
+ if (type->is_sampler() ||
+ (type->is_array() && type->fields.array->is_sampler())) {
+ file = PROGRAM_SAMPLER;
+ } else {
+ file = PROGRAM_UNIFORM;
+ }
+
+ GLint index = _mesa_lookup_parameter_index(prog->Parameters, -1,
+ uniform->Name);
+
+ if (index < 0) {
+ index = _mesa_add_parameter(prog->Parameters, file,
+ uniform->Name, size, type->gl_type,
+ NULL, NULL, 0x0);
+
+ /* Sampler uniform values are stored in prog->SamplerUnits,
+ * and the entry in that array is selected by this index we
+ * store in ParameterValues[].
+ */
+ if (file == PROGRAM_SAMPLER) {
+ for (unsigned int j = 0; j < size / 4; j++)
+ prog->Parameters->ParameterValues[index + j][0].f = next_sampler++;
+ }
+
+ /* The location chosen in the Parameters list here (returned
+ * from _mesa_add_uniform) has to match what the linker chose.
+ */
+ if (index != parameter_index) {
+ fail_link(shader_program, "Allocation of uniform `%s' to target "
+ "failed (%d vs %d)\n",
+ uniform->Name, index, parameter_index);
+ }
+ }
+ }
+
+ ralloc_free(sorted_uniforms);
+ }
+
+ static void
+ set_uniform_initializer(struct gl_context *ctx, void *mem_ctx,
+ struct gl_shader_program *shader_program,
+ const char *name, const glsl_type *type,
+ ir_constant *val)
+ {
+ if (type->is_record()) {
+ ir_constant *field_constant;
+
+ field_constant = (ir_constant *)val->components.get_head();
+
+ for (unsigned int i = 0; i < type->length; i++) {
+ const glsl_type *field_type = type->fields.structure[i].type;
+ const char *field_name = ralloc_asprintf(mem_ctx, "%s.%s", name,
+ type->fields.structure[i].name);
+ set_uniform_initializer(ctx, mem_ctx, shader_program, field_name,
+ field_type, field_constant);
+ field_constant = (ir_constant *)field_constant->next;
+ }
+ return;
+ }
+
+ int loc = _mesa_get_uniform_location(ctx, shader_program, name);
+
+ if (loc == -1) {
+ fail_link(shader_program,
+ "Couldn't find uniform for initializer %s\n", name);
+ return;
+ }
+
+ for (unsigned int i = 0; i < (type->is_array() ? type->length : 1); i++) {
+ ir_constant *element;
+ const glsl_type *element_type;
+ if (type->is_array()) {
+ element = val->array_elements[i];
+ element_type = type->fields.array;
+ } else {
+ element = val;
+ element_type = type;
+ }
+
+ void *values;
+
+ if (element_type->base_type == GLSL_TYPE_BOOL) {
+ int *conv = ralloc_array(mem_ctx, int, element_type->components());
+ for (unsigned int j = 0; j < element_type->components(); j++) {
+ conv[j] = element->value.b[j];
+ }
+ values = (void *)conv;
+ element_type = glsl_type::get_instance(GLSL_TYPE_INT,
+ element_type->vector_elements,
+ 1);
+ } else {
+ values = &element->value;
+ }
+
+ if (element_type->is_matrix()) {
+ _mesa_uniform_matrix(ctx, shader_program,
+ element_type->matrix_columns,
+ element_type->vector_elements,
+ loc, 1, GL_FALSE, (GLfloat *)values);
+ loc += element_type->matrix_columns;
+ } else {
+ _mesa_uniform(ctx, shader_program, loc, element_type->matrix_columns,
+ values, element_type->gl_type);
+ loc += type_size(element_type);
+ }
+ }
+ }
+
+ static void
+ set_uniform_initializers(struct gl_context *ctx,
+ struct gl_shader_program *shader_program)
+ {
+ void *mem_ctx = NULL;
+
+ for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {
+ struct gl_shader *shader = shader_program->_LinkedShaders[i];
+
+ if (shader == NULL)
+ continue;
+
+ foreach_iter(exec_list_iterator, iter, *shader->ir) {
+ ir_instruction *ir = (ir_instruction *)iter.get();
+ ir_variable *var = ir->as_variable();
+
+ if (!var || var->mode != ir_var_uniform || !var->constant_value)
+ continue;
+
+ if (!mem_ctx)
+ mem_ctx = ralloc_context(NULL);
+
+ set_uniform_initializer(ctx, mem_ctx, shader_program, var->name,
+ var->type, var->constant_value);
+ }
+ }
+
+ ralloc_free(mem_ctx);
+ }
+
+ /*
+ * Scan/rewrite program to remove reads of custom (output) registers.
+ * The passed type has to be either PROGRAM_OUTPUT or PROGRAM_VARYING
+ * (for vertex shaders).
+ * In GLSL shaders, varying vars can be read and written.
+ * On some hardware, trying to read an output register causes trouble.
+ * So, rewrite the program to use a temporary register in this case.
+ *
+ * Based on _mesa_remove_output_reads from programopt.c.
+ */
+ void
+ glsl_to_tgsi_visitor::remove_output_reads(gl_register_file type)
+ {
+ GLuint i;
+ GLint outputMap[VERT_RESULT_MAX];
+ GLint outputTypes[VERT_RESULT_MAX];
+ GLuint numVaryingReads = 0;
+ GLboolean usedTemps[MAX_TEMPS];
+ GLuint firstTemp = 0;
+
+ _mesa_find_used_registers(prog, PROGRAM_TEMPORARY,
+ usedTemps, MAX_TEMPS);
+
+ assert(type == PROGRAM_VARYING || type == PROGRAM_OUTPUT);
+ assert(prog->Target == GL_VERTEX_PROGRAM_ARB || type != PROGRAM_VARYING);
+
+ for (i = 0; i < VERT_RESULT_MAX; i++)
+ outputMap[i] = -1;
+
+ /* look for instructions which read from varying vars */
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ const GLuint numSrc = num_inst_src_regs(inst->op);
+ GLuint j;
+ for (j = 0; j < numSrc; j++) {
+ if (inst->src[j].file == type) {
+ /* replace the read with a temp reg */
+ const GLuint var = inst->src[j].index;
+ if (outputMap[var] == -1) {
+ numVaryingReads++;
+ outputMap[var] = _mesa_find_free_register(usedTemps,
+ MAX_TEMPS,
+ firstTemp);
+ outputTypes[var] = inst->src[j].type;
+ firstTemp = outputMap[var] + 1;
+ }
+ inst->src[j].file = PROGRAM_TEMPORARY;
+ inst->src[j].index = outputMap[var];
+ }
+ }
+ }
+
+ if (numVaryingReads == 0)
+ return; /* nothing to be done */
+
+ /* look for instructions which write to the varying vars identified above */
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ if (inst->dst.file == type && outputMap[inst->dst.index] >= 0) {
+ /* change inst to write to the temp reg, instead of the varying */
+ inst->dst.file = PROGRAM_TEMPORARY;
+ inst->dst.index = outputMap[inst->dst.index];
+ }
+ }
+
+ /* insert new MOV instructions at the end */
+ for (i = 0; i < VERT_RESULT_MAX; i++) {
+ if (outputMap[i] >= 0) {
+ /* MOV VAR[i], TEMP[tmp]; */
+ st_src_reg src = st_src_reg(PROGRAM_TEMPORARY, outputMap[i], outputTypes[i]);
+ st_dst_reg dst = st_dst_reg(type, WRITEMASK_XYZW, outputTypes[i]);
+ dst.index = i;
+ this->emit(NULL, TGSI_OPCODE_MOV, dst, src);
+ }
+ }
+ }
+
+ /**
+ * Returns the mask of channels (bitmask of WRITEMASK_X,Y,Z,W) which
+ * are read from the given src in this instruction
+ */
+ static int
+ get_src_arg_mask(st_dst_reg dst, st_src_reg src)
+ {
+ int read_mask = 0, comp;
+
+ /* Now, given the src swizzle and the written channels, find which
+ * components are actually read
+ */
+ for (comp = 0; comp < 4; ++comp) {
+ const unsigned coord = GET_SWZ(src.swizzle, comp);
+ ASSERT(coord < 4);
+ if (dst.writemask & (1 << comp) && coord <= SWIZZLE_W)
+ read_mask |= 1 << coord;
+ }
+
+ return read_mask;
+ }
+
+ /**
+ * This pass replaces CMP T0, T1 T2 T0 with MOV T0, T2 when the CMP
+ * instruction is the first instruction to write to register T0. There are
+ * several lowering passes done in GLSL IR (e.g. branches and
+ * relative addressing) that create a large number of conditional assignments
+ * that ir_to_mesa converts to CMP instructions like the one mentioned above.
+ *
+ * Here is why this conversion is safe:
+ * CMP T0, T1 T2 T0 can be expanded to:
+ * if (T1 < 0.0)
+ * MOV T0, T2;
+ * else
+ * MOV T0, T0;
+ *
+ * If (T1 < 0.0) evaluates to true then our replacement MOV T0, T2 is the same
+ * as the original program. If (T1 < 0.0) evaluates to false, executing
+ * MOV T0, T0 will store a garbage value in T0 since T0 is uninitialized.
+ * Therefore, it doesn't matter that we are replacing MOV T0, T0 with MOV T0, T2
+ * because any instruction that was going to read from T0 after this was going
+ * to read a garbage value anyway.
+ */
+ void
+ glsl_to_tgsi_visitor::simplify_cmp(void)
+ {
+ unsigned tempWrites[MAX_TEMPS];
+ unsigned outputWrites[MAX_PROGRAM_OUTPUTS];
+
+ memset(tempWrites, 0, sizeof(tempWrites));
+ memset(outputWrites, 0, sizeof(outputWrites));
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ unsigned prevWriteMask = 0;
+
+ /* Give up if we encounter relative addressing or flow control. */
+ if (inst->dst.reladdr ||
+ tgsi_get_opcode_info(inst->op)->is_branch ||
+ inst->op == TGSI_OPCODE_BGNSUB ||
+ inst->op == TGSI_OPCODE_CONT ||
+ inst->op == TGSI_OPCODE_END ||
+ inst->op == TGSI_OPCODE_ENDSUB ||
+ inst->op == TGSI_OPCODE_RET) {
+ return;
+ }
+
+ if (inst->dst.file == PROGRAM_OUTPUT) {
+ assert(inst->dst.index < MAX_PROGRAM_OUTPUTS);
+ prevWriteMask = outputWrites[inst->dst.index];
+ outputWrites[inst->dst.index] |= inst->dst.writemask;
+ } else if (inst->dst.file == PROGRAM_TEMPORARY) {
+ assert(inst->dst.index < MAX_TEMPS);
+ prevWriteMask = tempWrites[inst->dst.index];
+ tempWrites[inst->dst.index] |= inst->dst.writemask;
+ }
+
+ /* For a CMP to be considered a conditional write, the destination
+ * register and source register two must be the same. */
+ if (inst->op == TGSI_OPCODE_CMP
+ && !(inst->dst.writemask & prevWriteMask)
+ && inst->src[2].file == inst->dst.file
+ && inst->src[2].index == inst->dst.index
+ && inst->dst.writemask == get_src_arg_mask(inst->dst, inst->src[2])) {
+
+ inst->op = TGSI_OPCODE_MOV;
+ inst->src[0] = inst->src[1];
+ }
+ }
+ }
+
+ /* Replaces all references to a temporary register index with another index. */
+ void
+ glsl_to_tgsi_visitor::rename_temp_register(int index, int new_index)
+ {
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ unsigned j;
+
+ for (j=0; j < num_inst_src_regs(inst->op); j++) {
+ if (inst->src[j].file == PROGRAM_TEMPORARY &&
+ inst->src[j].index == index) {
+ inst->src[j].index = new_index;
+ }
+ }
+
+ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index) {
+ inst->dst.index = new_index;
+ }
+ }
+ }
+
+ int
+ glsl_to_tgsi_visitor::get_first_temp_read(int index)
+ {
+ int depth = 0; /* loop depth */
+ int loop_start = -1; /* index of the first active BGNLOOP (if any) */
+ unsigned i = 0, j;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ for (j=0; j < num_inst_src_regs(inst->op); j++) {
+ if (inst->src[j].file == PROGRAM_TEMPORARY &&
+ inst->src[j].index == index) {
+ return (depth == 0) ? i : loop_start;
+ }
+ }
+
+ if (inst->op == TGSI_OPCODE_BGNLOOP) {
+ if(depth++ == 0)
+ loop_start = i;
+ } else if (inst->op == TGSI_OPCODE_ENDLOOP) {
+ if (--depth == 0)
+ loop_start = -1;
+ }
+ assert(depth >= 0);
+
+ i++;
+ }
+
+ return -1;
+ }
+
+ int
+ glsl_to_tgsi_visitor::get_first_temp_write(int index)
+ {
+ int depth = 0; /* loop depth */
+ int loop_start = -1; /* index of the first active BGNLOOP (if any) */
+ int i = 0;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index) {
+ return (depth == 0) ? i : loop_start;
+ }
+
+ if (inst->op == TGSI_OPCODE_BGNLOOP) {
+ if(depth++ == 0)
+ loop_start = i;
+ } else if (inst->op == TGSI_OPCODE_ENDLOOP) {
+ if (--depth == 0)
+ loop_start = -1;
+ }
+ assert(depth >= 0);
+
+ i++;
+ }
+
+ return -1;
+ }
+
+ int
+ glsl_to_tgsi_visitor::get_last_temp_read(int index)
+ {
+ int depth = 0; /* loop depth */
+ int last = -1; /* index of last instruction that reads the temporary */
+ unsigned i = 0, j;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ for (j=0; j < num_inst_src_regs(inst->op); j++) {
+ if (inst->src[j].file == PROGRAM_TEMPORARY &&
+ inst->src[j].index == index) {
+ last = (depth == 0) ? i : -2;
+ }
+ }
+
+ if (inst->op == TGSI_OPCODE_BGNLOOP)
+ depth++;
+ else if (inst->op == TGSI_OPCODE_ENDLOOP)
+ if (--depth == 0 && last == -2)
+ last = i;
+ assert(depth >= 0);
+
+ i++;
+ }
+
+ assert(last >= -1);
+ return last;
+ }
+
+ int
+ glsl_to_tgsi_visitor::get_last_temp_write(int index)
+ {
+ int depth = 0; /* loop depth */
+ int last = -1; /* index of last instruction that writes to the temporary */
+ int i = 0;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == index)
+ last = (depth == 0) ? i : -2;
+
+ if (inst->op == TGSI_OPCODE_BGNLOOP)
+ depth++;
+ else if (inst->op == TGSI_OPCODE_ENDLOOP)
+ if (--depth == 0 && last == -2)
+ last = i;
+ assert(depth >= 0);
+
+ i++;
+ }
+
+ assert(last >= -1);
+ return last;
+ }
+
+ /*
+ * On a basic block basis, tracks available PROGRAM_TEMPORARY register
+ * channels for copy propagation and updates following instructions to
+ * use the original versions.
+ *
+ * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
+ * will occur. As an example, a TXP production before this pass:
+ *
+ * 0: MOV TEMP[1], INPUT[4].xyyy;
+ * 1: MOV TEMP[1].w, INPUT[4].wwww;
+ * 2: TXP TEMP[2], TEMP[1], texture[0], 2D;
+ *
+ * and after:
+ *
+ * 0: MOV TEMP[1], INPUT[4].xyyy;
+ * 1: MOV TEMP[1].w, INPUT[4].wwww;
+ * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
+ *
+ * which allows for dead code elimination on TEMP[1]'s writes.
+ */
+ void
+ glsl_to_tgsi_visitor::copy_propagate(void)
+ {
+ glsl_to_tgsi_instruction **acp = rzalloc_array(mem_ctx,
+ glsl_to_tgsi_instruction *,
+ this->next_temp * 4);
+ int *acp_level = rzalloc_array(mem_ctx, int, this->next_temp * 4);
+ int level = 0;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ assert(inst->dst.file != PROGRAM_TEMPORARY
+ || inst->dst.index < this->next_temp);
+
+ /* First, do any copy propagation possible into the src regs. */
+ for (int r = 0; r < 3; r++) {
+ glsl_to_tgsi_instruction *first = NULL;
+ bool good = true;
+ int acp_base = inst->src[r].index * 4;
+
+ if (inst->src[r].file != PROGRAM_TEMPORARY ||
+ inst->src[r].reladdr)
+ continue;
+
+ /* See if we can find entries in the ACP consisting of MOVs
+ * from the same src register for all the swizzled channels
+ * of this src register reference.
+ */
+ for (int i = 0; i < 4; i++) {
+ int src_chan = GET_SWZ(inst->src[r].swizzle, i);
+ glsl_to_tgsi_instruction *copy_chan = acp[acp_base + src_chan];
+
+ if (!copy_chan) {
+ good = false;
+ break;
+ }
+
+ assert(acp_level[acp_base + src_chan] <= level);
+
+ if (!first) {
+ first = copy_chan;
+ } else {
+ if (first->src[0].file != copy_chan->src[0].file ||
+ first->src[0].index != copy_chan->src[0].index) {
+ good = false;
+ break;
+ }
+ }
+ }
+
+ if (good) {
+ /* We've now validated that we can copy-propagate to
+ * replace this src register reference. Do it.
+ */
+ inst->src[r].file = first->src[0].file;
+ inst->src[r].index = first->src[0].index;
+
+ int swizzle = 0;
+ for (int i = 0; i < 4; i++) {
+ int src_chan = GET_SWZ(inst->src[r].swizzle, i);
+ glsl_to_tgsi_instruction *copy_inst = acp[acp_base + src_chan];
+ swizzle |= (GET_SWZ(copy_inst->src[0].swizzle, src_chan) <<
+ (3 * i));
+ }
+ inst->src[r].swizzle = swizzle;
+ }
+ }
+
+ switch (inst->op) {
+ case TGSI_OPCODE_BGNLOOP:
+ case TGSI_OPCODE_ENDLOOP:
+ /* End of a basic block, clear the ACP entirely. */
+ memset(acp, 0, sizeof(*acp) * this->next_temp * 4);
+ break;
+
+ case TGSI_OPCODE_IF:
+ ++level;
+ break;
+
+ case TGSI_OPCODE_ENDIF:
+ case TGSI_OPCODE_ELSE:
+ /* Clear all channels written inside the block from the ACP, but
+ * leaving those that were not touched.
+ */
+ for (int r = 0; r < this->next_temp; r++) {
+ for (int c = 0; c < 4; c++) {
+ if (!acp[4 * r + c])
+ continue;
+
+ if (acp_level[4 * r + c] >= level)
+ acp[4 * r + c] = NULL;
+ }
+ }
+ if (inst->op == TGSI_OPCODE_ENDIF)
+ --level;
+ break;
+
+ default:
+ /* Continuing the block, clear any written channels from
+ * the ACP.
+ */
+ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.reladdr) {
+ /* Any temporary might be written, so no copy propagation
+ * across this instruction.
+ */
+ memset(acp, 0, sizeof(*acp) * this->next_temp * 4);
+ } else if (inst->dst.file == PROGRAM_OUTPUT &&
+ inst->dst.reladdr) {
+ /* Any output might be written, so no copy propagation
+ * from outputs across this instruction.
+ */
+ for (int r = 0; r < this->next_temp; r++) {
+ for (int c = 0; c < 4; c++) {
+ if (!acp[4 * r + c])
+ continue;
+
+ if (acp[4 * r + c]->src[0].file == PROGRAM_OUTPUT)
+ acp[4 * r + c] = NULL;
+ }
+ }
+ } else if (inst->dst.file == PROGRAM_TEMPORARY ||
+ inst->dst.file == PROGRAM_OUTPUT) {
+ /* Clear where it's used as dst. */
+ if (inst->dst.file == PROGRAM_TEMPORARY) {
+ for (int c = 0; c < 4; c++) {
+ if (inst->dst.writemask & (1 << c)) {
+ acp[4 * inst->dst.index + c] = NULL;
+ }
+ }
+ }
+
+ /* Clear where it's used as src. */
+ for (int r = 0; r < this->next_temp; r++) {
+ for (int c = 0; c < 4; c++) {
+ if (!acp[4 * r + c])
+ continue;
+
+ int src_chan = GET_SWZ(acp[4 * r + c]->src[0].swizzle, c);
+
+ if (acp[4 * r + c]->src[0].file == inst->dst.file &&
+ acp[4 * r + c]->src[0].index == inst->dst.index &&
+ inst->dst.writemask & (1 << src_chan))
+ {
+ acp[4 * r + c] = NULL;
+ }
+ }
+ }
+ }
+ break;
+ }
+
+ /* If this is a copy, add it to the ACP. */
+ if (inst->op == TGSI_OPCODE_MOV &&
+ inst->dst.file == PROGRAM_TEMPORARY &&
+ !inst->dst.reladdr &&
+ !inst->saturate &&
+ !inst->src[0].reladdr &&
+ !inst->src[0].negate) {
+ for (int i = 0; i < 4; i++) {
+ if (inst->dst.writemask & (1 << i)) {
+ acp[4 * inst->dst.index + i] = inst;
+ acp_level[4 * inst->dst.index + i] = level;
+ }
+ }
+ }
+ }
+
+ ralloc_free(acp_level);
+ ralloc_free(acp);
+ }
+
+ /*
+ * Tracks available PROGRAM_TEMPORARY registers for dead code elimination.
+ *
+ * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
+ * will occur. As an example, a TXP production after copy propagation but
+ * before this pass:
+ *
+ * 0: MOV TEMP[1], INPUT[4].xyyy;
+ * 1: MOV TEMP[1].w, INPUT[4].wwww;
+ * 2: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
+ *
+ * and after this pass:
+ *
+ * 0: TXP TEMP[2], INPUT[4].xyyw, texture[0], 2D;
+ *
+ * FIXME: assumes that all functions are inlined (no support for BGNSUB/ENDSUB)
+ * FIXME: doesn't eliminate all dead code inside of loops; it steps around them
+ */
+ void
+ glsl_to_tgsi_visitor::eliminate_dead_code(void)
+ {
+ int i;
+
+ for (i=0; i < this->next_temp; i++) {
+ int last_read = get_last_temp_read(i);
+ int j = 0;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ if (inst->dst.file == PROGRAM_TEMPORARY && inst->dst.index == i &&
+ j > last_read)
+ {
+ iter.remove();
+ delete inst;
+ }
+
+ j++;
+ }
+ }
+ }
+
+ /*
+ * On a basic block basis, tracks available PROGRAM_TEMPORARY registers for dead
+ * code elimination. This is less primitive than eliminate_dead_code(), as it
+ * is per-channel and can detect consecutive writes without a read between them
+ * as dead code. However, there is some dead code that can be eliminated by
+ * eliminate_dead_code() but not this function - for example, this function
+ * cannot eliminate an instruction writing to a register that is never read and
+ * is the only instruction writing to that register.
+ *
+ * The glsl_to_tgsi_visitor lazily produces code assuming that this pass
+ * will occur.
+ */
+ int
+ glsl_to_tgsi_visitor::eliminate_dead_code_advanced(void)
+ {
+ glsl_to_tgsi_instruction **writes = rzalloc_array(mem_ctx,
+ glsl_to_tgsi_instruction *,
+ this->next_temp * 4);
+ int *write_level = rzalloc_array(mem_ctx, int, this->next_temp * 4);
+ int level = 0;
+ int removed = 0;
+
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ assert(inst->dst.file != PROGRAM_TEMPORARY
+ || inst->dst.index < this->next_temp);
+
+ switch (inst->op) {
+ case TGSI_OPCODE_BGNLOOP:
+ case TGSI_OPCODE_ENDLOOP:
+ /* End of a basic block, clear the write array entirely.
+ * FIXME: This keeps us from killing dead code when the writes are
+ * on either side of a loop, even when the register isn't touched
+ * inside the loop.
+ */
+ memset(writes, 0, sizeof(*writes) * this->next_temp * 4);
+ break;
+
+ case TGSI_OPCODE_ENDIF:
+ --level;
+ break;
+
+ case TGSI_OPCODE_ELSE:
+ /* Clear all channels written inside the preceding if block from the
+ * write array, but leave those that were not touched.
+ *
+ * FIXME: This destroys opportunities to remove dead code inside of
+ * IF blocks that are followed by an ELSE block.
+ */
+ for (int r = 0; r < this->next_temp; r++) {
+ for (int c = 0; c < 4; c++) {
+ if (!writes[4 * r + c])
+ continue;
+
+ if (write_level[4 * r + c] >= level)
+ writes[4 * r + c] = NULL;
+ }
+ }
+ break;
+
+ case TGSI_OPCODE_IF:
+ ++level;
+ /* fallthrough to default case to mark the condition as read */
+
+ default:
+ /* Continuing the block, clear any channels from the write array that
+ * are read by this instruction.
+ */
+ for (int i = 0; i < 4; i++) {
+ if (inst->src[i].file == PROGRAM_TEMPORARY && inst->src[i].reladdr){
+ /* Any temporary might be read, so no dead code elimination
+ * across this instruction.
+ */
+ memset(writes, 0, sizeof(*writes) * this->next_temp * 4);
+ } else if (inst->src[i].file == PROGRAM_TEMPORARY) {
+ /* Clear where it's used as src. */
+ int src_chans = 1 << GET_SWZ(inst->src[i].swizzle, 0);
+ src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 1);
+ src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 2);
+ src_chans |= 1 << GET_SWZ(inst->src[i].swizzle, 3);
+
+ for (int c = 0; c < 4; c++) {
+ if (src_chans & (1 << c)) {
+ writes[4 * inst->src[i].index + c] = NULL;
+ }
+ }
+ }
+ }
+ break;
+ }
+
+ /* If this instruction writes to a temporary, add it to the write array.
+ * If there is already an instruction in the write array for one or more
+ * of the channels, flag that channel write as dead.
+ */
+ if (inst->dst.file == PROGRAM_TEMPORARY &&
+ !inst->dst.reladdr &&
+ !inst->saturate) {
+ for (int c = 0; c < 4; c++) {
+ if (inst->dst.writemask & (1 << c)) {
+ if (writes[4 * inst->dst.index + c]) {
+ if (write_level[4 * inst->dst.index + c] < level)
+ continue;
+ else
+ writes[4 * inst->dst.index + c]->dead_mask |= (1 << c);
+ }
+ writes[4 * inst->dst.index + c] = inst;
+ write_level[4 * inst->dst.index + c] = level;
+ }
+ }
+ }
+ }
+
+ /* Anything still in the write array at this point is dead code. */
+ for (int r = 0; r < this->next_temp; r++) {
+ for (int c = 0; c < 4; c++) {
+ glsl_to_tgsi_instruction *inst = writes[4 * r + c];
+ if (inst)
+ inst->dead_mask |= (1 << c);
+ }
+ }
+
+ /* Now actually remove the instructions that are completely dead and update
+ * the writemask of other instructions with dead channels.
+ */
+ foreach_iter(exec_list_iterator, iter, this->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+
+ if (!inst->dead_mask || !inst->dst.writemask)
+ continue;
+ else if (inst->dead_mask == inst->dst.writemask) {
+ iter.remove();
+ delete inst;
+ removed++;
+ } else
+ inst->dst.writemask &= ~(inst->dead_mask);
+ }
+
+ ralloc_free(write_level);
+ ralloc_free(writes);
+
+ return removed;
+ }
+
+ /* Merges temporary registers together where possible to reduce the number of
+ * registers needed to run a program.
+ *
+ * Produces optimal code only after copy propagation and dead code elimination
+ * have been run. */
+ void
+ glsl_to_tgsi_visitor::merge_registers(void)
+ {
+ int *last_reads = rzalloc_array(mem_ctx, int, this->next_temp);
+ int *first_writes = rzalloc_array(mem_ctx, int, this->next_temp);
+ int i, j;
+
+ /* Read the indices of the last read and first write to each temp register
+ * into an array so that we don't have to traverse the instruction list as
+ * much. */
+ for (i=0; i < this->next_temp; i++) {
+ last_reads[i] = get_last_temp_read(i);
+ first_writes[i] = get_first_temp_write(i);
+ }
+
+ /* Start looking for registers with non-overlapping usages that can be
+ * merged together. */
+ for (i=0; i < this->next_temp; i++) {
+ /* Don't touch unused registers. */
+ if (last_reads[i] < 0 || first_writes[i] < 0) continue;
+
+ for (j=0; j < this->next_temp; j++) {
+ /* Don't touch unused registers. */
+ if (last_reads[j] < 0 || first_writes[j] < 0) continue;
+
+ /* We can merge the two registers if the first write to j is after or
+ * in the same instruction as the last read from i. Note that the
+ * register at index i will always be used earlier or at the same time
+ * as the register at index j. */
+ if (first_writes[i] <= first_writes[j] &&
+ last_reads[i] <= first_writes[j])
+ {
+ rename_temp_register(j, i); /* Replace all references to j with i.*/
+
+ /* Update the first_writes and last_reads arrays with the new
+ * values for the merged register index, and mark the newly unused
+ * register index as such. */
+ last_reads[i] = last_reads[j];
+ first_writes[j] = -1;
+ last_reads[j] = -1;
+ }
+ }
+ }
+
+ ralloc_free(last_reads);
+ ralloc_free(first_writes);
+ }
+
+ /* Reassign indices to temporary registers by reusing unused indices created
+ * by optimization passes. */
+ void
+ glsl_to_tgsi_visitor::renumber_registers(void)
+ {
+ int i = 0;
+ int new_index = 0;
+
+ for (i=0; i < this->next_temp; i++) {
+ if (get_first_temp_read(i) < 0) continue;
+ if (i != new_index)
+ rename_temp_register(i, new_index);
+ new_index++;
+ }
+
+ this->next_temp = new_index;
+ }
+
+ /**
+ * Returns a fragment program which implements the current pixel transfer ops.
+ * Based on get_pixel_transfer_program in st_atom_pixeltransfer.c.
+ */
+ extern "C" void
+ get_pixel_transfer_visitor(struct st_fragment_program *fp,
+ glsl_to_tgsi_visitor *original,
+ int scale_and_bias, int pixel_maps)
+ {
+ glsl_to_tgsi_visitor *v = new glsl_to_tgsi_visitor();
+ struct st_context *st = st_context(original->ctx);
+ struct gl_program *prog = &fp->Base.Base;
+ struct gl_program_parameter_list *params = _mesa_new_parameter_list();
+ st_src_reg coord, src0;
+ st_dst_reg dst0;
+ glsl_to_tgsi_instruction *inst;
+
+ /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
+ v->ctx = original->ctx;
+ v->prog = prog;
+ v->glsl_version = original->glsl_version;
+ v->options = original->options;
+ v->next_temp = original->next_temp;
+ v->num_address_regs = original->num_address_regs;
+ v->samplers_used = prog->SamplersUsed = original->samplers_used;
+ v->indirect_addr_temps = original->indirect_addr_temps;
+ v->indirect_addr_consts = original->indirect_addr_consts;
+ memcpy(&v->immediates, &original->immediates, sizeof(v->immediates));
+
+ /*
+ * Get initial pixel color from the texture.
+ * TEX colorTemp, fragment.texcoord[0], texture[0], 2D;
+ */
+ coord = st_src_reg(PROGRAM_INPUT, FRAG_ATTRIB_TEX0, glsl_type::vec2_type);
+ src0 = v->get_temp(glsl_type::vec4_type);
+ dst0 = st_dst_reg(src0);
+ inst = v->emit(NULL, TGSI_OPCODE_TEX, dst0, coord);
+ inst->sampler = 0;
+ inst->tex_target = TEXTURE_2D_INDEX;
+
+ prog->InputsRead |= (1 << FRAG_ATTRIB_TEX0);
+ prog->SamplersUsed |= (1 << 0); /* mark sampler 0 as used */
+ v->samplers_used |= (1 << 0);
+
+ if (scale_and_bias) {
+ static const gl_state_index scale_state[STATE_LENGTH] =
+ { STATE_INTERNAL, STATE_PT_SCALE,
+ (gl_state_index) 0, (gl_state_index) 0, (gl_state_index) 0 };
+ static const gl_state_index bias_state[STATE_LENGTH] =
+ { STATE_INTERNAL, STATE_PT_BIAS,
+ (gl_state_index) 0, (gl_state_index) 0, (gl_state_index) 0 };
+ GLint scale_p, bias_p;
+ st_src_reg scale, bias;
+
+ scale_p = _mesa_add_state_reference(params, scale_state);
+ bias_p = _mesa_add_state_reference(params, bias_state);
+
+ /* MAD colorTemp, colorTemp, scale, bias; */
+ scale = st_src_reg(PROGRAM_STATE_VAR, scale_p, GLSL_TYPE_FLOAT);
+ bias = st_src_reg(PROGRAM_STATE_VAR, bias_p, GLSL_TYPE_FLOAT);
+ inst = v->emit(NULL, TGSI_OPCODE_MAD, dst0, src0, scale, bias);
+ }
+
+ if (pixel_maps) {
+ st_src_reg temp = v->get_temp(glsl_type::vec4_type);
+ st_dst_reg temp_dst = st_dst_reg(temp);
+
+ assert(st->pixel_xfer.pixelmap_texture);
+
+ /* With a little effort, we can do four pixel map look-ups with
+ * two TEX instructions:
+ */
+
+ /* TEX temp.rg, colorTemp.rgba, texture[1], 2D; */
+ temp_dst.writemask = WRITEMASK_XY; /* write R,G */
+ inst = v->emit(NULL, TGSI_OPCODE_TEX, temp_dst, src0);
+ inst->sampler = 1;
+ inst->tex_target = TEXTURE_2D_INDEX;
+
+ /* TEX temp.ba, colorTemp.baba, texture[1], 2D; */
+ src0.swizzle = MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W, SWIZZLE_Z, SWIZZLE_W);
+ temp_dst.writemask = WRITEMASK_ZW; /* write B,A */
+ inst = v->emit(NULL, TGSI_OPCODE_TEX, temp_dst, src0);
+ inst->sampler = 1;
+ inst->tex_target = TEXTURE_2D_INDEX;
+
+ prog->SamplersUsed |= (1 << 1); /* mark sampler 1 as used */
+ v->samplers_used |= (1 << 1);
+
+ /* MOV colorTemp, temp; */
+ inst = v->emit(NULL, TGSI_OPCODE_MOV, dst0, temp);
+ }
+
+ /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
+ * new visitor. */
+ foreach_iter(exec_list_iterator, iter, original->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ st_src_reg src_regs[3];
+
+ if (inst->dst.file == PROGRAM_OUTPUT)
+ prog->OutputsWritten |= BITFIELD64_BIT(inst->dst.index);
+
+ for (int i=0; i<3; i++) {
+ src_regs[i] = inst->src[i];
+ if (src_regs[i].file == PROGRAM_INPUT &&
+ src_regs[i].index == FRAG_ATTRIB_COL0)
+ {
+ src_regs[i].file = PROGRAM_TEMPORARY;
+ src_regs[i].index = src0.index;
+ }
+ else if (src_regs[i].file == PROGRAM_INPUT)
+ prog->InputsRead |= (1 << src_regs[i].index);
+ }
+
+ v->emit(NULL, inst->op, inst->dst, src_regs[0], src_regs[1], src_regs[2]);
+ }
+
+ /* Make modifications to fragment program info. */
+ prog->Parameters = _mesa_combine_parameter_lists(params,
+ original->prog->Parameters);
+ prog->Attributes = _mesa_clone_parameter_list(original->prog->Attributes);
+ prog->Varying = _mesa_clone_parameter_list(original->prog->Varying);
+ _mesa_free_parameter_list(params);
+ count_resources(v, prog);
+ fp->glsl_to_tgsi = v;
+ }
+
+ /**
+ * Make fragment program for glBitmap:
+ * Sample the texture and kill the fragment if the bit is 0.
+ * This program will be combined with the user's fragment program.
+ *
+ * Based on make_bitmap_fragment_program in st_cb_bitmap.c.
+ */
+ extern "C" void
+ get_bitmap_visitor(struct st_fragment_program *fp,
+ glsl_to_tgsi_visitor *original, int samplerIndex)
+ {
+ glsl_to_tgsi_visitor *v = new glsl_to_tgsi_visitor();
+ struct st_context *st = st_context(original->ctx);
+ struct gl_program *prog = &fp->Base.Base;
+ st_src_reg coord, src0;
+ st_dst_reg dst0;
+ glsl_to_tgsi_instruction *inst;
+
+ /* Copy attributes of the glsl_to_tgsi_visitor in the original shader. */
+ v->ctx = original->ctx;
+ v->prog = prog;
+ v->glsl_version = original->glsl_version;
+ v->options = original->options;
+ v->next_temp = original->next_temp;
+ v->num_address_regs = original->num_address_regs;
+ v->samplers_used = prog->SamplersUsed = original->samplers_used;
+ v->indirect_addr_temps = original->indirect_addr_temps;
+ v->indirect_addr_consts = original->indirect_addr_consts;
+ memcpy(&v->immediates, &original->immediates, sizeof(v->immediates));
+
+ /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
+ coord = st_src_reg(PROGRAM_INPUT, FRAG_ATTRIB_TEX0, glsl_type::vec2_type);
+ src0 = v->get_temp(glsl_type::vec4_type);
+ dst0 = st_dst_reg(src0);
+ inst = v->emit(NULL, TGSI_OPCODE_TEX, dst0, coord);
+ inst->sampler = samplerIndex;
+ inst->tex_target = TEXTURE_2D_INDEX;
+
+ prog->InputsRead |= (1 << FRAG_ATTRIB_TEX0);
+ prog->SamplersUsed |= (1 << samplerIndex); /* mark sampler as used */
+ v->samplers_used |= (1 << samplerIndex);
+
+ /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
+ src0.negate = NEGATE_XYZW;
+ if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM)
+ src0.swizzle = SWIZZLE_XXXX;
+ inst = v->emit(NULL, TGSI_OPCODE_KIL, undef_dst, src0);
+
+ /* Now copy the instructions from the original glsl_to_tgsi_visitor into the
+ * new visitor. */
+ foreach_iter(exec_list_iterator, iter, original->instructions) {
+ glsl_to_tgsi_instruction *inst = (glsl_to_tgsi_instruction *)iter.get();
+ st_src_reg src_regs[3];
+
+ if (inst->dst.file == PROGRAM_OUTPUT)
+ prog->OutputsWritten |= BITFIELD64_BIT(inst->dst.index);
+
+ for (int i=0; i<3; i++) {
+ src_regs[i] = inst->src[i];
+ if (src_regs[i].file == PROGRAM_INPUT)
+ prog->InputsRead |= (1 << src_regs[i].index);
+ }
+
+ v->emit(NULL, inst->op, inst->dst, src_regs[0], src_regs[1], src_regs[2]);
+ }
+
+ /* Make modifications to fragment program info. */
+ prog->Parameters = _mesa_clone_parameter_list(original->prog->Parameters);
+ prog->Attributes = _mesa_clone_parameter_list(original->prog->Attributes);
+ prog->Varying = _mesa_clone_parameter_list(original->prog->Varying);
+ count_resources(v, prog);
+ fp->glsl_to_tgsi = v;
+ }
+
+ /* ------------------------- TGSI conversion stuff -------------------------- */
+ struct label {
+ unsigned branch_target;
+ unsigned token;
+ };
+
+ /**
+ * Intermediate state used during shader translation.
+ */
+ struct st_translate {
+ struct ureg_program *ureg;
+
+ struct ureg_dst temps[MAX_TEMPS];
+ struct ureg_src *constants;
+ struct ureg_src *immediates;
+ struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS];
+ struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
+ struct ureg_dst address[1];
+ struct ureg_src samplers[PIPE_MAX_SAMPLERS];
+ struct ureg_src systemValues[SYSTEM_VALUE_MAX];
+
+ /* Extra info for handling point size clamping in vertex shader */
+ struct ureg_dst pointSizeResult; /**< Actual point size output register */
+ struct ureg_src pointSizeConst; /**< Point size range constant register */
+ GLint pointSizeOutIndex; /**< Temp point size output register */
+ GLboolean prevInstWrotePointSize;
+
+ const GLuint *inputMapping;
+ const GLuint *outputMapping;
+
+ /* For every instruction that contains a label (eg CALL), keep
+ * details so that we can go back afterwards and emit the correct
+ * tgsi instruction number for each label.
+ */
+ struct label *labels;
+ unsigned labels_size;
+ unsigned labels_count;
+
+ /* Keep a record of the tgsi instruction number that each mesa
+ * instruction starts at, will be used to fix up labels after
+ * translation.
+ */
+ unsigned *insn;
+ unsigned insn_size;
+ unsigned insn_count;
+
+ unsigned procType; /**< TGSI_PROCESSOR_VERTEX/FRAGMENT */
+
+ boolean error;
+ };
+
+ /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
+ static unsigned mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = {
+ TGSI_SEMANTIC_FACE,
+ TGSI_SEMANTIC_INSTANCEID
+ };
+
+ /**
+ * Make note of a branch to a label in the TGSI code.
+ * After we've emitted all instructions, we'll go over the list
+ * of labels built here and patch the TGSI code with the actual
+ * location of each label.
+ */
+ static unsigned *get_label(struct st_translate *t, unsigned branch_target)
+ {
+ unsigned i;
+
+ if (t->labels_count + 1 >= t->labels_size) {
+ t->labels_size = 1 << (util_logbase2(t->labels_size) + 1);
+ t->labels = (struct label *)realloc(t->labels,
+ t->labels_size * sizeof(struct label));
+ if (t->labels == NULL) {
+ static unsigned dummy;
+ t->error = TRUE;
+ return &dummy;
+ }
+ }
+
+ i = t->labels_count++;
+ t->labels[i].branch_target = branch_target;
+ return &t->labels[i].token;
+ }
+
+ /**
+ * Called prior to emitting the TGSI code for each instruction.
+ * Allocate additional space for instructions if needed.
+ * Update the insn[] array so the next glsl_to_tgsi_instruction points to
+ * the next TGSI instruction.
+ */
+ static void set_insn_start(struct st_translate *t, unsigned start)
+ {
+ if (t->insn_count + 1 >= t->insn_size) {
+ t->insn_size = 1 << (util_logbase2(t->insn_size) + 1);
+ t->insn = (unsigned *)realloc(t->insn, t->insn_size * sizeof(t->insn[0]));
+ if (t->insn == NULL) {
+ t->error = TRUE;
+ return;
+ }
+ }
+
+ t->insn[t->insn_count++] = start;
+ }
+
+ /**
+ * Map a glsl_to_tgsi constant/immediate to a TGSI immediate.
+ */
+ static struct ureg_src
+ emit_immediate(struct st_translate *t,
+ gl_constant_value values[4],
+ int type, int size)
+ {
+ struct ureg_program *ureg = t->ureg;
+
+ switch(type)
+ {
+ case GL_FLOAT:
+ return ureg_DECL_immediate(ureg, &values[0].f, size);
+ case GL_INT:
+ return ureg_DECL_immediate_int(ureg, &values[0].i, size);
+ case GL_UNSIGNED_INT:
+ case GL_BOOL:
+ return ureg_DECL_immediate_uint(ureg, &values[0].u, size);
+ default:
+ assert(!"should not get here - type must be float, int, uint, or bool");
+ return ureg_src_undef();
+ }
+ }
+
+ /**
+ * Map a glsl_to_tgsi dst register to a TGSI ureg_dst register.
+ */
+ static struct ureg_dst
+ dst_register(struct st_translate *t,
+ gl_register_file file,
+ GLuint index)
+ {
+ switch(file) {
+ case PROGRAM_UNDEFINED:
+ return ureg_dst_undef();
+
+ case PROGRAM_TEMPORARY:
+ if (ureg_dst_is_undef(t->temps[index]))
+ t->temps[index] = ureg_DECL_temporary(t->ureg);
+
+ return t->temps[index];
+
+ case PROGRAM_OUTPUT:
+ if (t->procType == TGSI_PROCESSOR_VERTEX && index == VERT_RESULT_PSIZ)
+ t->prevInstWrotePointSize = GL_TRUE;
+
+ if (t->procType == TGSI_PROCESSOR_VERTEX)
+ assert(index < VERT_RESULT_MAX);
+ else if (t->procType == TGSI_PROCESSOR_FRAGMENT)
+ assert(index < FRAG_RESULT_MAX);
+ else
+ assert(index < GEOM_RESULT_MAX);
+
+ assert(t->outputMapping[index] < Elements(t->outputs));
+
+ return t->outputs[t->outputMapping[index]];
+
+ case PROGRAM_ADDRESS:
+ return t->address[index];
+
+ default:
+ assert(!"unknown dst register file");
+ return ureg_dst_undef();
+ }
+ }
+
+ /**
+ * Map a glsl_to_tgsi src register to a TGSI ureg_src register.
+ */
+ static struct ureg_src
+ src_register(struct st_translate *t,
+ gl_register_file file,
+ GLuint index)
+ {
+ switch(file) {
+ case PROGRAM_UNDEFINED:
+ return ureg_src_undef();
+
+ case PROGRAM_TEMPORARY:
+ assert(index >= 0);
+ assert(index < Elements(t->temps));
+ if (ureg_dst_is_undef(t->temps[index]))
+ t->temps[index] = ureg_DECL_temporary(t->ureg);
+ return ureg_src(t->temps[index]);
+
+ case PROGRAM_NAMED_PARAM:
+ case PROGRAM_ENV_PARAM:
+ case PROGRAM_LOCAL_PARAM:
+ case PROGRAM_UNIFORM:
+ assert(index >= 0);
+ return t->constants[index];
+ case PROGRAM_STATE_VAR:
+ case PROGRAM_CONSTANT: /* ie, immediate */
+ if (index < 0)
+ return ureg_DECL_constant(t->ureg, 0);
+ else
+ return t->constants[index];
+
+ case PROGRAM_IMMEDIATE:
+ return t->immediates[index];
+
+ case PROGRAM_INPUT:
+ assert(t->inputMapping[index] < Elements(t->inputs));
+ return t->inputs[t->inputMapping[index]];
+
+ case PROGRAM_OUTPUT:
+ assert(t->outputMapping[index] < Elements(t->outputs));
+ return ureg_src(t->outputs[t->outputMapping[index]]); /* not needed? */
+
+ case PROGRAM_ADDRESS:
+ return ureg_src(t->address[index]);
+
+ case PROGRAM_SYSTEM_VALUE:
+ assert(index < Elements(t->systemValues));
+ return t->systemValues[index];
+
+ default:
+ assert(!"unknown src register file");
+ return ureg_src_undef();
+ }
+ }
+
+ /**
+ * Create a TGSI ureg_dst register from an st_dst_reg.
+ */
+ static struct ureg_dst
+ translate_dst(struct st_translate *t,
+ const st_dst_reg *dst_reg,
+ bool saturate)
+ {
+ struct ureg_dst dst = dst_register(t,
+ dst_reg->file,
+ dst_reg->index);
+
+ dst = ureg_writemask(dst, dst_reg->writemask);
+
+ if (saturate)
+ dst = ureg_saturate(dst);
+
+ if (dst_reg->reladdr != NULL)
+ dst = ureg_dst_indirect(dst, ureg_src(t->address[0]));
+
+ return dst;
+ }
+
+ /**
+ * Create a TGSI ureg_src register from an st_src_reg.
+ */
+ static struct ureg_src
+ translate_src(struct st_translate *t, const st_src_reg *src_reg)
+ {
+ struct ureg_src src = src_register(t, src_reg->file, src_reg->index);
+
+ src = ureg_swizzle(src,
+ GET_SWZ(src_reg->swizzle, 0) & 0x3,
+ GET_SWZ(src_reg->swizzle, 1) & 0x3,
+ GET_SWZ(src_reg->swizzle, 2) & 0x3,
+ GET_SWZ(src_reg->swizzle, 3) & 0x3);
+
+ if ((src_reg->negate & 0xf) == NEGATE_XYZW)
+ src = ureg_negate(src);
+
+ if (src_reg->reladdr != NULL) {
+ /* Normally ureg_src_indirect() would be used here, but a stupid compiler
+ * bug in g++ makes ureg_src_indirect (an inline C function) erroneously
+ * set the bit for src.Negate. So we have to do the operation manually
+ * here to work around the compiler's problems. */
+ /*src = ureg_src_indirect(src, ureg_src(t->address[0]));*/
+ struct ureg_src addr = ureg_src(t->address[0]);
+ src.Indirect = 1;
+ src.IndirectFile = addr.File;
+ src.IndirectIndex = addr.Index;
+ src.IndirectSwizzle = addr.SwizzleX;
+
+ if (src_reg->file != PROGRAM_INPUT &&
+ src_reg->file != PROGRAM_OUTPUT) {
+ /* If src_reg->index was negative, it was set to zero in
+ * src_register(). Reassign it now. But don't do this
+ * for input/output regs since they get remapped while
+ * const buffers don't.
+ */
+ src.Index = src_reg->index;
+ }
+ }
+
+ return src;
+ }
+
+ static void
+ compile_tgsi_instruction(struct st_translate *t,
+ const struct glsl_to_tgsi_instruction *inst)
+ {
+ struct ureg_program *ureg = t->ureg;
+ GLuint i;
+ struct ureg_dst dst[1];
+ struct ureg_src src[4];
+ unsigned num_dst;
+ unsigned num_src;
+
+ num_dst = num_inst_dst_regs(inst->op);
+ num_src = num_inst_src_regs(inst->op);
+
+ if (num_dst)
+ dst[0] = translate_dst(t,
+ &inst->dst,
+ inst->saturate);
+
+ for (i = 0; i < num_src; i++)
+ src[i] = translate_src(t, &inst->src[i]);
+
+ switch(inst->op) {
+ case TGSI_OPCODE_BGNLOOP:
+ case TGSI_OPCODE_CAL:
+ case TGSI_OPCODE_ELSE:
+ case TGSI_OPCODE_ENDLOOP:
+ case TGSI_OPCODE_IF:
+ assert(num_dst == 0);
+ ureg_label_insn(ureg,
+ inst->op,
+ src, num_src,
+ get_label(t,
+ inst->op == TGSI_OPCODE_CAL ? inst->function->sig_id : 0));
+ return;
+
+ case TGSI_OPCODE_TEX:
+ case TGSI_OPCODE_TXB:
+ case TGSI_OPCODE_TXD:
+ case TGSI_OPCODE_TXL:
+ case TGSI_OPCODE_TXP:
+ src[num_src++] = t->samplers[inst->sampler];
+ ureg_tex_insn(ureg,
+ inst->op,
+ dst, num_dst,
+ translate_texture_target(inst->tex_target, inst->tex_shadow),
+ src, num_src);
+ return;
+
+ case TGSI_OPCODE_SCS:
+ dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XY);
+ ureg_insn(ureg, inst->op, dst, num_dst, src, num_src);
+ break;
+
+ default:
+ ureg_insn(ureg,
+ inst->op,
+ dst, num_dst,
+ src, num_src);
+ break;
+ }
+ }
+
+ /**
+ * Emit the TGSI instructions to adjust the WPOS pixel center convention
+ * Basically, add (adjX, adjY) to the fragment position.
+ */
+ static void
+ emit_adjusted_wpos(struct st_translate *t,
+ const struct gl_program *program,
+ float adjX, float adjY)
+ {
+ struct ureg_program *ureg = t->ureg;
+ struct ureg_dst wpos_temp = ureg_DECL_temporary(ureg);
+ struct ureg_src wpos_input = t->inputs[t->inputMapping[FRAG_ATTRIB_WPOS]];
+
+ /* Note that we bias X and Y and pass Z and W through unchanged.
+ * The shader might also use gl_FragCoord.w and .z.
+ */
+ ureg_ADD(ureg, wpos_temp, wpos_input,
+ ureg_imm4f(ureg, adjX, adjY, 0.0f, 0.0f));
+
+ t->inputs[t->inputMapping[FRAG_ATTRIB_WPOS]] = ureg_src(wpos_temp);
+ }
+
+
+ /**
+ * Emit the TGSI instructions for inverting the WPOS y coordinate.
+ * This code is unavoidable because it also depends on whether
+ * a FBO is bound (STATE_FB_WPOS_Y_TRANSFORM).
+ */
+ static void
+ emit_wpos_inversion(struct st_translate *t,
+ const struct gl_program *program,
+ bool invert)
+ {
+ struct ureg_program *ureg = t->ureg;
+
+ /* Fragment program uses fragment position input.
+ * Need to replace instances of INPUT[WPOS] with temp T
+ * where T = INPUT[WPOS] by y is inverted.
+ */
+ static const gl_state_index wposTransformState[STATE_LENGTH]
+ = { STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM,
+ (gl_state_index)0, (gl_state_index)0, (gl_state_index)0 };
+
+ /* XXX: note we are modifying the incoming shader here! Need to
+ * do this before emitting the constant decls below, or this
+ * will be missed:
+ */
+ unsigned wposTransConst = _mesa_add_state_reference(program->Parameters,
+ wposTransformState);
+
+ struct ureg_src wpostrans = ureg_DECL_constant(ureg, wposTransConst);
+ struct ureg_dst wpos_temp;
+ struct ureg_src wpos_input = t->inputs[t->inputMapping[FRAG_ATTRIB_WPOS]];
+
+ /* MOV wpos_temp, input[wpos]
+ */
+ if (wpos_input.File == TGSI_FILE_TEMPORARY)
+ wpos_temp = ureg_dst(wpos_input);
+ else {
+ wpos_temp = ureg_DECL_temporary(ureg);
+ ureg_MOV(ureg, wpos_temp, wpos_input);
+ }
+
+ if (invert) {
+ /* MAD wpos_temp.y, wpos_input, wpostrans.xxxx, wpostrans.yyyy
+ */
+ ureg_MAD(ureg,
+ ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y),
+ wpos_input,
+ ureg_scalar(wpostrans, 0),
+ ureg_scalar(wpostrans, 1));
+ } else {
+ /* MAD wpos_temp.y, wpos_input, wpostrans.zzzz, wpostrans.wwww
+ */
+ ureg_MAD(ureg,
+ ureg_writemask(wpos_temp, TGSI_WRITEMASK_Y),
+ wpos_input,
+ ureg_scalar(wpostrans, 2),
+ ureg_scalar(wpostrans, 3));
+ }
+
+ /* Use wpos_temp as position input from here on:
+ */
+ t->inputs[t->inputMapping[FRAG_ATTRIB_WPOS]] = ureg_src(wpos_temp);
+ }
+
+
+ /**
+ * Emit fragment position/ooordinate code.
+ */
+ static void
+ emit_wpos(struct st_context *st,
+ struct st_translate *t,
+ const struct gl_program *program,
+ struct ureg_program *ureg)
+ {
+ const struct gl_fragment_program *fp =
+ (const struct gl_fragment_program *) program;
+ struct pipe_screen *pscreen = st->pipe->screen;
+ boolean invert = FALSE;
+
+ if (fp->OriginUpperLeft) {
+ /* Fragment shader wants origin in upper-left */
+ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT)) {
+ /* the driver supports upper-left origin */
+ }
+ else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT)) {
+ /* the driver supports lower-left origin, need to invert Y */
+ ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT);
+ invert = TRUE;
+ }
+ else
+ assert(0);
+ }
+ else {
+ /* Fragment shader wants origin in lower-left */
+ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT))
+ /* the driver supports lower-left origin */
+ ureg_property_fs_coord_origin(ureg, TGSI_FS_COORD_ORIGIN_LOWER_LEFT);
+ else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT))
+ /* the driver supports upper-left origin, need to invert Y */
+ invert = TRUE;
+ else
+ assert(0);
+ }
+
+ if (fp->PixelCenterInteger) {
+ /* Fragment shader wants pixel center integer */
+ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER))
+ /* the driver supports pixel center integer */
+ ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER);
+ else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER))
+ /* the driver supports pixel center half integer, need to bias X,Y */
+ emit_adjusted_wpos(t, program, 0.5f, invert ? 0.5f : -0.5f);
+ else
+ assert(0);
+ }
+ else {
+ /* Fragment shader wants pixel center half integer */
+ if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER)) {
+ /* the driver supports pixel center half integer */
+ }
+ else if (pscreen->get_param(pscreen, PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER)) {
+ /* the driver supports pixel center integer, need to bias X,Y */
+ ureg_property_fs_coord_pixel_center(ureg, TGSI_FS_COORD_PIXEL_CENTER_INTEGER);
+ emit_adjusted_wpos(t, program, 0.5f, invert ? -0.5f : 0.5f);
+ }
+ else
+ assert(0);
+ }
+
+ /* we invert after adjustment so that we avoid the MOV to temporary,
+ * and reuse the adjustment ADD instead */
+ emit_wpos_inversion(t, program, invert);
+ }
+
+ /**
+ * OpenGL's fragment gl_FrontFace input is 1 for front-facing, 0 for back.
+ * TGSI uses +1 for front, -1 for back.
+ * This function converts the TGSI value to the GL value. Simply clamping/
+ * saturating the value to [0,1] does the job.
+ */
+ static void
+ emit_face_var(struct st_translate *t)
+ {
+ struct ureg_program *ureg = t->ureg;
+ struct ureg_dst face_temp = ureg_DECL_temporary(ureg);
+ struct ureg_src face_input = t->inputs[t->inputMapping[FRAG_ATTRIB_FACE]];
+
+ /* MOV_SAT face_temp, input[face] */
+ face_temp = ureg_saturate(face_temp);
+ ureg_MOV(ureg, face_temp, face_input);
+
+ /* Use face_temp as face input from here on: */
+ t->inputs[t->inputMapping[FRAG_ATTRIB_FACE]] = ureg_src(face_temp);
+ }
+
+ static void
+ emit_edgeflags(struct st_translate *t)
+ {
+ struct ureg_program *ureg = t->ureg;
+ struct ureg_dst edge_dst = t->outputs[t->outputMapping[VERT_RESULT_EDGE]];
+ struct ureg_src edge_src = t->inputs[t->inputMapping[VERT_ATTRIB_EDGEFLAG]];
+
+ ureg_MOV(ureg, edge_dst, edge_src);
+ }
+
+ /**
+ * Translate intermediate IR (glsl_to_tgsi_instruction) to TGSI format.
+ * \param program the program to translate
+ * \param numInputs number of input registers used
+ * \param inputMapping maps Mesa fragment program inputs to TGSI generic
+ * input indexes
+ * \param inputSemanticName the TGSI_SEMANTIC flag for each input
+ * \param inputSemanticIndex the semantic index (ex: which texcoord) for
+ * each input
+ * \param interpMode the TGSI_INTERPOLATE_LINEAR/PERSP mode for each input
+ * \param numOutputs number of output registers used
+ * \param outputMapping maps Mesa fragment program outputs to TGSI
+ * generic outputs
+ * \param outputSemanticName the TGSI_SEMANTIC flag for each output
+ * \param outputSemanticIndex the semantic index (ex: which texcoord) for
+ * each output
+ *
+ * \return PIPE_OK or PIPE_ERROR_OUT_OF_MEMORY
+ */
+ extern "C" enum pipe_error
+ st_translate_program(
+ struct gl_context *ctx,
+ uint procType,
+ struct ureg_program *ureg,
+ glsl_to_tgsi_visitor *program,
+ const struct gl_program *proginfo,
+ GLuint numInputs,
+ const GLuint inputMapping[],
+ const ubyte inputSemanticName[],
+ const ubyte inputSemanticIndex[],
+ const GLuint interpMode[],
+ GLuint numOutputs,
+ const GLuint outputMapping[],
+ const ubyte outputSemanticName[],
+ const ubyte outputSemanticIndex[],
+ boolean passthrough_edgeflags)
+ {
+ struct st_translate translate, *t;
+ unsigned i;
+ enum pipe_error ret = PIPE_OK;
+
+ assert(numInputs <= Elements(t->inputs));
+ assert(numOutputs <= Elements(t->outputs));
+
+ t = &translate;
+ memset(t, 0, sizeof *t);
+
+ t->procType = procType;
+ t->inputMapping = inputMapping;
+ t->outputMapping = outputMapping;
+ t->ureg = ureg;
+ t->pointSizeOutIndex = -1;
+ t->prevInstWrotePointSize = GL_FALSE;
+
+ /*
+ * Declare input attributes.
+ */
+ if (procType == TGSI_PROCESSOR_FRAGMENT) {
+ for (i = 0; i < numInputs; i++) {
+ t->inputs[i] = ureg_DECL_fs_input(ureg,
+ inputSemanticName[i],
+ inputSemanticIndex[i],
+ interpMode[i]);
+ }
+
+ if (proginfo->InputsRead & FRAG_BIT_WPOS) {
+ /* Must do this after setting up t->inputs, and before
+ * emitting constant references, below:
+ */
+ emit_wpos(st_context(ctx), t, proginfo, ureg);
+ }
+
+ if (proginfo->InputsRead & FRAG_BIT_FACE)
+ emit_face_var(t);
+
+ /*
+ * Declare output attributes.
+ */
+ for (i = 0; i < numOutputs; i++) {
+ switch (outputSemanticName[i]) {
+ case TGSI_SEMANTIC_POSITION:
+ t->outputs[i] = ureg_DECL_output(ureg,
+ TGSI_SEMANTIC_POSITION, /* Z/Depth */
+ outputSemanticIndex[i]);
+ t->outputs[i] = ureg_writemask(t->outputs[i], TGSI_WRITEMASK_Z);
+ break;
+ case TGSI_SEMANTIC_STENCIL:
+ t->outputs[i] = ureg_DECL_output(ureg,
+ TGSI_SEMANTIC_STENCIL, /* Stencil */
+ outputSemanticIndex[i]);
+ t->outputs[i] = ureg_writemask(t->outputs[i], TGSI_WRITEMASK_Y);
+ break;
+ case TGSI_SEMANTIC_COLOR:
+ t->outputs[i] = ureg_DECL_output(ureg,
+ TGSI_SEMANTIC_COLOR,
+ outputSemanticIndex[i]);
+ break;
+ default:
+ assert(!"fragment shader outputs must be POSITION/STENCIL/COLOR");
+ return PIPE_ERROR_BAD_INPUT;
+ }
+ }
+ }
+ else if (procType == TGSI_PROCESSOR_GEOMETRY) {
+ for (i = 0; i < numInputs; i++) {
+ t->inputs[i] = ureg_DECL_gs_input(ureg,
+ i,
+ inputSemanticName[i],
+ inputSemanticIndex[i]);
+ }
+
+ for (i = 0; i < numOutputs; i++) {
+ t->outputs[i] = ureg_DECL_output(ureg,
+ outputSemanticName[i],
+ outputSemanticIndex[i]);
+ }
+ }
+ else {
+ assert(procType == TGSI_PROCESSOR_VERTEX);
+
+ for (i = 0; i < numInputs; i++) {
+ t->inputs[i] = ureg_DECL_vs_input(ureg, i);
+ }
+
+ for (i = 0; i < numOutputs; i++) {
+ t->outputs[i] = ureg_DECL_output(ureg,
+ outputSemanticName[i],
+ outputSemanticIndex[i]);
+ if ((outputSemanticName[i] == TGSI_SEMANTIC_PSIZE) && proginfo->Id) {
+ /* Writing to the point size result register requires special
+ * handling to implement clamping.
+ */
+ static const gl_state_index pointSizeClampState[STATE_LENGTH]
+ = { STATE_INTERNAL, STATE_POINT_SIZE_IMPL_CLAMP, (gl_state_index)0, (gl_state_index)0, (gl_state_index)0 };
+ /* XXX: note we are modifying the incoming shader here! Need to
+ * do this before emitting the constant decls below, or this
+ * will be missed.
+ */
+ unsigned pointSizeClampConst =
+ _mesa_add_state_reference(proginfo->Parameters,
+ pointSizeClampState);
+ struct ureg_dst psizregtemp = ureg_DECL_temporary(ureg);
+ t->pointSizeConst = ureg_DECL_constant(ureg, pointSizeClampConst);
+ t->pointSizeResult = t->outputs[i];
+ t->pointSizeOutIndex = i;
+ t->outputs[i] = psizregtemp;
+ }
+ }
+ if (passthrough_edgeflags)
+ emit_edgeflags(t);
+ }
+
+ /* Declare address register.
+ */
+ if (program->num_address_regs > 0) {
+ assert(program->num_address_regs == 1);
+ t->address[0] = ureg_DECL_address(ureg);
+ }
+
+ /* Declare misc input registers
+ */
+ {
+ GLbitfield sysInputs = proginfo->SystemValuesRead;
+ unsigned numSys = 0;
+ for (i = 0; sysInputs; i++) {
+ if (sysInputs & (1 << i)) {
+ unsigned semName = mesa_sysval_to_semantic[i];
+ t->systemValues[i] = ureg_DECL_system_value(ureg, numSys, semName, 0);
+ numSys++;
+ sysInputs &= ~(1 << i);
+ }
+ }
+ }
+
+ if (program->indirect_addr_temps) {
+ /* If temps are accessed with indirect addressing, declare temporaries
+ * in sequential order. Else, we declare them on demand elsewhere.
+ * (Note: the number of temporaries is equal to program->next_temp)
+ */
+ for (i = 0; i < (unsigned)program->next_temp; i++) {
+ /* XXX use TGSI_FILE_TEMPORARY_ARRAY when it's supported by ureg */
+ t->temps[i] = ureg_DECL_temporary(t->ureg);
+ }
+ }
+
+ /* Emit constants and uniforms. TGSI uses a single index space for these,
+ * so we put all the translated regs in t->constants.
+ */
+ if (proginfo->Parameters) {
+ t->constants = (struct ureg_src *)CALLOC(proginfo->Parameters->NumParameters * sizeof(t->constants[0]));
+ if (t->constants == NULL) {
+ ret = PIPE_ERROR_OUT_OF_MEMORY;
+ goto out;
+ }
+
+ for (i = 0; i < proginfo->Parameters->NumParameters; i++) {
+ switch (proginfo->Parameters->Parameters[i].Type) {
+ case PROGRAM_ENV_PARAM:
+ case PROGRAM_LOCAL_PARAM:
+ case PROGRAM_STATE_VAR:
+ case PROGRAM_NAMED_PARAM:
+ case PROGRAM_UNIFORM:
+ t->constants[i] = ureg_DECL_constant(ureg, i);
+ break;
+
+ /* Emit immediates for PROGRAM_CONSTANT only when there's no indirect
+ * addressing of the const buffer.
+ * FIXME: Be smarter and recognize param arrays:
+ * indirect addressing is only valid within the referenced
+ * array.
+ */
+ case PROGRAM_CONSTANT:
+ if (program->indirect_addr_consts)
+ t->constants[i] = ureg_DECL_constant(ureg, i);
+ else
+ t->constants[i] = emit_immediate(t,
+ proginfo->Parameters->ParameterValues[i],
+ proginfo->Parameters->Parameters[i].DataType,
+ 4);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ /* Emit immediate values.
+ */
+ t->immediates = (struct ureg_src *)CALLOC(program->num_immediates * sizeof(struct ureg_src));
+ if (t->immediates == NULL) {
+ ret = PIPE_ERROR_OUT_OF_MEMORY;
+ goto out;
+ }
+ i = 0;
+ foreach_iter(exec_list_iterator, iter, program->immediates) {
+ immediate_storage *imm = (immediate_storage *)iter.get();
+ t->immediates[i++] = emit_immediate(t, imm->values, imm->type, imm->size);
+ }
+
+ /* texture samplers */
+ for (i = 0; i < ctx->Const.MaxTextureImageUnits; i++) {
+ if (program->samplers_used & (1 << i)) {
+ t->samplers[i] = ureg_DECL_sampler(ureg, i);
+ }
+ }
+
+ /* Emit each instruction in turn:
+ */
+ foreach_iter(exec_list_iterator, iter, program->instructions) {
+ set_insn_start(t, ureg_get_instruction_number(ureg));
+ compile_tgsi_instruction(t, (glsl_to_tgsi_instruction *)iter.get());
+
+ if (t->prevInstWrotePointSize && proginfo->Id) {
+ /* The previous instruction wrote to the (fake) vertex point size
+ * result register. Now we need to clamp that value to the min/max
+ * point size range, putting the result into the real point size
+ * register.
+ * Note that we can't do this easily at the end of program due to
+ * possible early return.
+ */
+ set_insn_start(t, ureg_get_instruction_number(ureg));
+ ureg_MAX(t->ureg,
+ ureg_writemask(t->outputs[t->pointSizeOutIndex], WRITEMASK_X),
+ ureg_src(t->outputs[t->pointSizeOutIndex]),
+ ureg_swizzle(t->pointSizeConst, 1,1,1,1));
+ ureg_MIN(t->ureg, ureg_writemask(t->pointSizeResult, WRITEMASK_X),
+ ureg_src(t->outputs[t->pointSizeOutIndex]),
+ ureg_swizzle(t->pointSizeConst, 2,2,2,2));
+ }
+ t->prevInstWrotePointSize = GL_FALSE;
+ }
+
+ /* Fix up all emitted labels:
+ */
+ for (i = 0; i < t->labels_count; i++) {
+ ureg_fixup_label(ureg, t->labels[i].token,
+ t->insn[t->labels[i].branch_target]);
+ }
+
+ out:
+ FREE(t->insn);
+ FREE(t->labels);
+ FREE(t->constants);
+ FREE(t->immediates);
+
+ if (t->error) {
+ debug_printf("%s: translate error flag set\n", __FUNCTION__);
+ }
+
+ return ret;
+ }
+ /* ----------------------------- End TGSI code ------------------------------ */
+
+ /**
+ * Convert a shader's GLSL IR into a Mesa gl_program, although without
+ * generating Mesa IR.
+ */
+ static struct gl_program *
+ get_mesa_program(struct gl_context *ctx,
+ struct gl_shader_program *shader_program,
+ struct gl_shader *shader)
+ {
+ glsl_to_tgsi_visitor* v = new glsl_to_tgsi_visitor();
+ struct gl_program *prog;
+ GLenum target;
+ const char *target_string;
+ bool progress;
+ struct gl_shader_compiler_options *options =
+ &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(shader->Type)];
+
+ switch (shader->Type) {
+ case GL_VERTEX_SHADER:
+ target = GL_VERTEX_PROGRAM_ARB;
+ target_string = "vertex";
+ break;
+ case GL_FRAGMENT_SHADER:
+ target = GL_FRAGMENT_PROGRAM_ARB;
+ target_string = "fragment";
+ break;
+ case GL_GEOMETRY_SHADER:
+ target = GL_GEOMETRY_PROGRAM_NV;
+ target_string = "geometry";
+ break;
+ default:
+ assert(!"should not be reached");
+ return NULL;
+ }
+
+ validate_ir_tree(shader->ir);
+
+ prog = ctx->Driver.NewProgram(ctx, target, shader_program->Name);
+ if (!prog)
+ return NULL;
+ prog->Parameters = _mesa_new_parameter_list();
+ prog->Varying = _mesa_new_parameter_list();
+ prog->Attributes = _mesa_new_parameter_list();
+ v->ctx = ctx;
+ v->prog = prog;
+ v->shader_program = shader_program;
+ v->options = options;
+ v->glsl_version = ctx->Const.GLSLVersion;
+
+ add_uniforms_to_parameters_list(shader_program, shader, prog);
+
+ /* Emit intermediate IR for main(). */
+ visit_exec_list(shader->ir, v);
+
+ /* Now emit bodies for any functions that were used. */
+ do {
+ progress = GL_FALSE;
+
+ foreach_iter(exec_list_iterator, iter, v->function_signatures) {
+ function_entry *entry = (function_entry *)iter.get();
+
+ if (!entry->bgn_inst) {
+ v->current_function = entry;
+
+ entry->bgn_inst = v->emit(NULL, TGSI_OPCODE_BGNSUB);
+ entry->bgn_inst->function = entry;
+
+ visit_exec_list(&entry->sig->body, v);
+
+ glsl_to_tgsi_instruction *last;
+ last = (glsl_to_tgsi_instruction *)v->instructions.get_tail();
+ if (last->op != TGSI_OPCODE_RET)
+ v->emit(NULL, TGSI_OPCODE_RET);
+
+ glsl_to_tgsi_instruction *end;
+ end = v->emit(NULL, TGSI_OPCODE_ENDSUB);
+ end->function = entry;
+
+ progress = GL_TRUE;
+ }
+ }
+ } while (progress);
+
+ #if 0
+ /* Print out some information (for debugging purposes) used by the
+ * optimization passes. */
+ for (i=0; i < v->next_temp; i++) {
+ int fr = v->get_first_temp_read(i);
+ int fw = v->get_first_temp_write(i);
+ int lr = v->get_last_temp_read(i);
+ int lw = v->get_last_temp_write(i);
+
+ printf("Temp %d: FR=%3d FW=%3d LR=%3d LW=%3d\n", i, fr, fw, lr, lw);
+ assert(fw <= fr);
+ }
+ #endif
+
+ /* Remove reads to output registers, and to varyings in vertex shaders. */
+ v->remove_output_reads(PROGRAM_OUTPUT);
+ if (target == GL_VERTEX_PROGRAM_ARB)
+ v->remove_output_reads(PROGRAM_VARYING);
+
+ /* Perform optimizations on the instructions in the glsl_to_tgsi_visitor. */
+ v->simplify_cmp();
+ v->copy_propagate();
+ while (v->eliminate_dead_code_advanced());
+
+ /* FIXME: These passes to optimize temporary registers don't work when there
+ * is indirect addressing of the temporary register space. We need proper
+ * array support so that we don't have to give up these passes in every
+ * shader that uses arrays.
+ */
+ if (!v->indirect_addr_temps) {
+ v->eliminate_dead_code();
+ v->merge_registers();
+ v->renumber_registers();
+ }
+
+ /* Write the END instruction. */
+ v->emit(NULL, TGSI_OPCODE_END);
+
+ if (ctx->Shader.Flags & GLSL_DUMP) {
+ printf("\n");
+ printf("GLSL IR for linked %s program %d:\n", target_string,
+ shader_program->Name);
+ _mesa_print_ir(shader->ir, NULL);
+ printf("\n");
+ printf("\n");
+ }
+
+ prog->Instructions = NULL;
+ prog->NumInstructions = 0;
+
+ do_set_program_inouts(shader->ir, prog);
+ count_resources(v, prog);
+
+ check_resources(ctx, shader_program, v, prog);
+
+ _mesa_reference_program(ctx, &shader->Program, prog);
+
+ struct st_vertex_program *stvp;
+ struct st_fragment_program *stfp;
+ struct st_geometry_program *stgp;
+
+ switch (shader->Type) {
+ case GL_VERTEX_SHADER:
+ stvp = (struct st_vertex_program *)prog;
+ stvp->glsl_to_tgsi = v;
+ break;
+ case GL_FRAGMENT_SHADER:
+ stfp = (struct st_fragment_program *)prog;
+ stfp->glsl_to_tgsi = v;
+ break;
+ case GL_GEOMETRY_SHADER:
+ stgp = (struct st_geometry_program *)prog;
+ stgp->glsl_to_tgsi = v;
+ break;
+ default:
+ assert(!"should not be reached");
+ return NULL;
+ }
+
+ return prog;
+ }
+
+ extern "C" {
+
+ struct gl_shader *
+ st_new_shader(struct gl_context *ctx, GLuint name, GLuint type)
+ {
+ struct gl_shader *shader;
+ assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER ||
+ type == GL_GEOMETRY_SHADER_ARB);
+ shader = rzalloc(NULL, struct gl_shader);
+ if (shader) {
+ shader->Type = type;
+ shader->Name = name;
+ _mesa_init_shader(ctx, shader);
+ }
+ return shader;
+ }
+
+ struct gl_shader_program *
+ st_new_shader_program(struct gl_context *ctx, GLuint name)
+ {
+ struct gl_shader_program *shProg;
+ shProg = rzalloc(NULL, struct gl_shader_program);
+ if (shProg) {
+ shProg->Name = name;
+ _mesa_init_shader_program(ctx, shProg);
+ }
+ return shProg;
+ }
+
+ /**
+ * Link a shader.
+ * Called via ctx->Driver.LinkShader()
+ * This actually involves converting GLSL IR into an intermediate TGSI-like IR
+ * with code lowering and other optimizations.
+ */
+ GLboolean
+ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
+ {
+ assert(prog->LinkStatus);
+
+ for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {
+ if (prog->_LinkedShaders[i] == NULL)
+ continue;
+
+ bool progress;
+ exec_list *ir = prog->_LinkedShaders[i]->ir;
+ const struct gl_shader_compiler_options *options =
+ &ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(prog->_LinkedShaders[i]->Type)];
+
+ do {
+ progress = false;
+
+ /* Lowering */
+ do_mat_op_to_vec(ir);
+ lower_instructions(ir, (MOD_TO_FRACT | DIV_TO_MUL_RCP | EXP_TO_EXP2
+ | LOG_TO_LOG2
+ | ((options->EmitNoPow) ? POW_TO_EXP2 : 0)));
+
+ progress = do_lower_jumps(ir, true, true, options->EmitNoMainReturn, options->EmitNoCont, options->EmitNoLoops) || progress;
+
+ progress = do_common_optimization(ir, true, options->MaxUnrollIterations) || progress;
+
+ progress = lower_quadop_vector(ir, false) || progress;
+
+ if (options->EmitNoIfs) {
+ progress = lower_discard(ir) || progress;
+ progress = lower_if_to_cond_assign(ir) || progress;
+ }
+
+ if (options->EmitNoNoise)
+ progress = lower_noise(ir) || progress;
+
+ /* If there are forms of indirect addressing that the driver
+ * cannot handle, perform the lowering pass.
+ */
+ if (options->EmitNoIndirectInput || options->EmitNoIndirectOutput
+ || options->EmitNoIndirectTemp || options->EmitNoIndirectUniform)
+ progress =
+ lower_variable_index_to_cond_assign(ir,
+ options->EmitNoIndirectInput,
+ options->EmitNoIndirectOutput,
+ options->EmitNoIndirectTemp,
+ options->EmitNoIndirectUniform)
+ || progress;
+
+ progress = do_vec_index_to_cond_assign(ir) || progress;
+ } while (progress);
+
+ validate_ir_tree(ir);
+ }
+
+ for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) {
+ struct gl_program *linked_prog;
+
+ if (prog->_LinkedShaders[i] == NULL)
+ continue;
+
+ linked_prog = get_mesa_program(ctx, prog, prog->_LinkedShaders[i]);
+
+ if (linked_prog) {
+ bool ok = true;
+
+ switch (prog->_LinkedShaders[i]->Type) {
+ case GL_VERTEX_SHADER:
+ _mesa_reference_vertprog(ctx, &prog->VertexProgram,
+ (struct gl_vertex_program *)linked_prog);
+ ok = ctx->Driver.ProgramStringNotify(ctx, GL_VERTEX_PROGRAM_ARB,
+ linked_prog);
+ break;
+ case GL_FRAGMENT_SHADER:
+ _mesa_reference_fragprog(ctx, &prog->FragmentProgram,
+ (struct gl_fragment_program *)linked_prog);
+ ok = ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_PROGRAM_ARB,
+ linked_prog);
+ break;
+ case GL_GEOMETRY_SHADER:
+ _mesa_reference_geomprog(ctx, &prog->GeometryProgram,
+ (struct gl_geometry_program *)linked_prog);
+ ok = ctx->Driver.ProgramStringNotify(ctx, GL_GEOMETRY_PROGRAM_NV,
+ linked_prog);
+ break;
+ }
+ if (!ok) {
+ return GL_FALSE;
+ }
+ }
+
+ _mesa_reference_program(ctx, &linked_prog, NULL);
+ }
+
+ return GL_TRUE;
+ }
+
+
+ /**
+ * Link a GLSL shader program. Called via glLinkProgram().
+ */
+ void
+ st_glsl_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
+ {
+ unsigned int i;
+
+ _mesa_clear_shader_program_data(ctx, prog);
+
+ prog->LinkStatus = GL_TRUE;
+
+ for (i = 0; i < prog->NumShaders; i++) {
+ if (!prog->Shaders[i]->CompileStatus) {
+ fail_link(prog, "linking with uncompiled shader");
+ prog->LinkStatus = GL_FALSE;
+ }
+ }
+
+ prog->Varying = _mesa_new_parameter_list();
+ _mesa_reference_vertprog(ctx, &prog->VertexProgram, NULL);
+ _mesa_reference_fragprog(ctx, &prog->FragmentProgram, NULL);
+ _mesa_reference_geomprog(ctx, &prog->GeometryProgram, NULL);
+
+ if (prog->LinkStatus) {
+ link_shaders(ctx, prog);
+ }
+
+ if (prog->LinkStatus) {
+ if (!ctx->Driver.LinkShader(ctx, prog)) {
+ prog->LinkStatus = GL_FALSE;
+ }
+ }
+
+ set_uniform_initializers(ctx, prog);
+
+ if (ctx->Shader.Flags & GLSL_DUMP) {
+ if (!prog->LinkStatus) {
+ printf("GLSL shader program %d failed to link\n", prog->Name);
+ }
+
+ if (prog->InfoLog && prog->InfoLog[0] != 0) {
+ printf("GLSL shader program %d info log:\n", prog->Name);
+ printf("%s\n", prog->InfoLog);
+ }
+ }
+ }
+
+ } /* extern "C" */
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