2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "cairo-drm-intel-brw-eu.h"
40 /* How does predicate control work when execution_size != 8? Do I
41 * need to test/set for 0xffff when execution_size is 16?
43 void brw_set_predicate_control_flag_value( struct brw_compile *p, uint32_t value )
45 p->current->header.predicate_control = BRW_PREDICATE_NONE;
48 if (value != p->flag_value) {
49 brw_push_insn_state(p);
50 brw_MOV(p, brw_flag_reg(), brw_imm_uw(value));
51 p->flag_value = value;
52 brw_pop_insn_state(p);
55 p->current->header.predicate_control = BRW_PREDICATE_NORMAL;
59 void brw_set_predicate_control( struct brw_compile *p, uint32_t pc )
61 p->current->header.predicate_control = pc;
64 void brw_set_conditionalmod( struct brw_compile *p, uint32_t conditional )
66 p->current->header.destreg__conditonalmod = conditional;
69 void brw_set_access_mode( struct brw_compile *p, uint32_t access_mode )
71 p->current->header.access_mode = access_mode;
74 void brw_set_compression_control( struct brw_compile *p, int compression_control )
76 p->current->header.compression_control = compression_control;
79 void brw_set_mask_control( struct brw_compile *p, uint32_t value )
81 p->current->header.mask_control = value;
84 void brw_set_saturate( struct brw_compile *p, uint32_t value )
86 p->current->header.saturate = value;
89 void brw_push_insn_state( struct brw_compile *p )
91 assert(p->current != &p->stack[BRW_EU_MAX_INSN_STACK-1]);
92 memcpy(p->current+1, p->current, sizeof(struct brw_instruction));
96 void brw_pop_insn_state( struct brw_compile *p )
98 assert(p->current != p->stack);
102 /************************************************************************/
104 brw_compile_init (struct brw_compile *p,
108 p->current = p->stack;
109 memset (p->current, 0, sizeof (p->current[0]));
114 brw_set_mask_control (p, BRW_MASK_ENABLE); /* what does this do? */
115 brw_set_saturate (p, 0);
116 brw_set_compression_control (p, BRW_COMPRESSION_NONE);
117 brw_set_predicate_control_flag_value (p, 0xff);
121 brw_get_program (struct brw_compile *p,
124 *sz = p->nr_insn * sizeof (struct brw_instruction);
125 return (const uint32_t *)p->store;
131 * Subroutine calls require special attention.
132 * Mesa instructions may be expanded into multiple hardware instructions
133 * so the prog_instruction::BranchTarget field can't be used as an index
134 * into the hardware instructions.
136 * The BranchTarget field isn't needed, however. Mesa's GLSL compiler
137 * emits CAL and BGNSUB instructions with labels that can be used to map
138 * subroutine calls to actual subroutine code blocks.
140 * The structures and function here implement patching of CAL instructions
141 * so they jump to the right subroutine code...
146 * For each OPCODE_BGNSUB we create one of these.
148 struct brw_glsl_label
150 const char *name; /*< the label string */
151 uint32_t position; /*< the position of the brw instruction for this label */
152 struct brw_glsl_label *next; /*< next in linked list */
157 * For each OPCODE_CAL we create one of these.
161 uint32_t call_inst_pos; /*< location of the CAL instruction */
162 const char *sub_name; /*< name of subroutine to call */
163 struct brw_glsl_call *next; /*< next in linked list */
168 * Called for each OPCODE_BGNSUB.
171 brw_save_label(struct brw_compile *c, const char *name, uint32_t position)
173 struct brw_glsl_label *label = calloc(1, sizeof *label);
175 label->position = position;
176 label->next = c->first_label;
177 c->first_label = label;
182 * Called for each OPCODE_CAL.
185 brw_save_call(struct brw_compile *c, const char *name, uint32_t call_pos)
187 struct brw_glsl_call *call = calloc(1, sizeof *call);
188 call->call_inst_pos = call_pos;
189 call->sub_name = name;
190 call->next = c->first_call;
191 c->first_call = call;
196 * Lookup a label, return label's position/offset.
199 brw_lookup_label(struct brw_compile *c, const char *name)
201 const struct brw_glsl_label *label;
202 for (label = c->first_label; label; label = label->next) {
203 if (strcmp(name, label->name) == 0) {
204 return label->position;
207 abort(); /* should never happen */
213 * When we're done generating code, this function is called to resolve
217 brw_resolve_cals(struct brw_compile *c)
219 const struct brw_glsl_call *call;
221 for (call = c->first_call; call; call = call->next) {
222 const uint32_t sub_loc = brw_lookup_label(c, call->sub_name);
223 struct brw_instruction *brw_call_inst = &c->store[call->call_inst_pos];
224 struct brw_instruction *brw_sub_inst = &c->store[sub_loc];
225 int32_t offset = brw_sub_inst - brw_call_inst;
227 /* patch brw_inst1 to point to brw_inst2 */
228 brw_set_src1(brw_call_inst, brw_imm_d(offset * 16));
231 /* free linked list of calls */
233 struct brw_glsl_call *call, *next;
234 for (call = c->first_call; call; call = next) {
238 c->first_call = NULL;
241 /* free linked list of labels */
243 struct brw_glsl_label *label, *next;
244 for (label = c->first_label; label; label = next) {
248 c->first_label = NULL;