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25 * \file prog_parameter_layout.c
26 * \brief Helper functions to layout storage for program parameters
28 * \author Ian Romanick <ian.d.romanick@intel.com>
31 #include "main/compiler.h"
32 #include "main/mtypes.h"
33 #include "prog_parameter.h"
34 #include "prog_parameter_layout.h"
35 #include "prog_instruction.h"
36 #include "program_parser.h"
39 _mesa_combine_swizzles(unsigned base, unsigned applied)
44 for (i = 0; i < 4; i++) {
45 const unsigned s = GET_SWZ(applied, i);
47 swiz |= ((s <= SWIZZLE_W) ? GET_SWZ(base, s) : s) << (i * 3);
55 * Copy indirect access array from one parameter list to another
57 * \param src Parameter array copied from
58 * \param dst Parameter array copied to
59 * \param first Index of first element in \c src to copy
60 * \param count Number of elements to copy
63 * The location in \c dst of the first element copied from \c src on
64 * success. -1 on failure.
67 * This function assumes that there is already enough space available in
68 * \c dst to hold all of the elements that will be copied over.
71 copy_indirect_accessed_array(struct gl_program_parameter_list *src,
72 struct gl_program_parameter_list *dst,
73 unsigned first, unsigned count)
75 const int base = dst->NumParameters;
78 for (i = first; i < (first + count); i++) {
79 struct gl_program_parameter *curr = & src->Parameters[i];
81 if (curr->Type == PROGRAM_CONSTANT) {
82 j = dst->NumParameters;
84 for (j = 0; j < dst->NumParameters; j++) {
85 if (memcmp(dst->Parameters[j].StateIndexes, curr->StateIndexes,
86 sizeof(curr->StateIndexes)) == 0) {
92 assert(j == dst->NumParameters);
94 /* copy src parameter [i] to dest parameter [j] */
95 memcpy(& dst->Parameters[j], curr,
96 sizeof(dst->Parameters[j]));
97 memcpy(dst->ParameterValues[j], src->ParameterValues[i],
100 /* Pointer to the string name was copied. Null-out src param name
101 * to prevent double free later.
105 dst->NumParameters++;
114 * \return GL_TRUE for success, GL_FALSE for failure
117 _mesa_layout_parameters(struct asm_parser_state *state)
119 struct gl_program_parameter_list *layout;
120 struct asm_instruction *inst;
124 _mesa_new_parameter_list_sized(state->prog->Parameters->NumParameters);
126 /* PASS 1: Move any parameters that are accessed indirectly from the
127 * original parameter list to the new parameter list.
129 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
130 for (i = 0; i < 3; i++) {
131 if (inst->SrcReg[i].Base.RelAddr) {
132 /* Only attempt to add the to the new parameter list once.
134 if (!inst->SrcReg[i].Symbol->pass1_done) {
135 const int new_begin =
136 copy_indirect_accessed_array(state->prog->Parameters, layout,
137 inst->SrcReg[i].Symbol->param_binding_begin,
138 inst->SrcReg[i].Symbol->param_binding_length);
144 inst->SrcReg[i].Symbol->param_binding_begin = new_begin;
145 inst->SrcReg[i].Symbol->pass1_done = 1;
148 /* Previously the Index was just the offset from the parameter
149 * array. Now that the base of the parameter array is known, the
150 * index can be updated to its actual value.
152 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
153 inst->Base.SrcReg[i].Index +=
154 inst->SrcReg[i].Symbol->param_binding_begin;
159 /* PASS 2: Move any parameters that are not accessed indirectly from the
160 * original parameter list to the new parameter list.
162 for (inst = state->inst_head; inst != NULL; inst = inst->next) {
163 for (i = 0; i < 3; i++) {
164 const struct gl_program_parameter *p;
165 const int idx = inst->SrcReg[i].Base.Index;
166 unsigned swizzle = SWIZZLE_NOOP;
168 /* All relative addressed operands were processed on the first
169 * pass. Just skip them here.
171 if (inst->SrcReg[i].Base.RelAddr) {
175 if ((inst->SrcReg[i].Base.File <= PROGRAM_VARYING )
176 || (inst->SrcReg[i].Base.File >= PROGRAM_WRITE_ONLY)) {
180 inst->Base.SrcReg[i] = inst->SrcReg[i].Base;
181 p = & state->prog->Parameters->Parameters[idx];
184 case PROGRAM_CONSTANT: {
185 const float *const v =
186 state->prog->Parameters->ParameterValues[idx];
188 inst->Base.SrcReg[i].Index =
189 _mesa_add_unnamed_constant(layout, v, p->Size, & swizzle);
191 inst->Base.SrcReg[i].Swizzle =
192 _mesa_combine_swizzles(swizzle, inst->Base.SrcReg[i].Swizzle);
196 case PROGRAM_STATE_VAR:
197 inst->Base.SrcReg[i].Index =
198 _mesa_add_state_reference(layout, p->StateIndexes);
205 inst->SrcReg[i].Base.File = p->Type;
206 inst->Base.SrcReg[i].File = p->Type;
210 layout->StateFlags = state->prog->Parameters->StateFlags;
211 _mesa_free_parameter_list(state->prog->Parameters);
212 state->prog->Parameters = layout;