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i965: initial code for loops in vertex programs

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This commit is contained in:
Brian Paul
2009-06-18 09:26:18 -06:00
parent fd7d764514
commit e90d6a3cbf
1 changed files with 38 additions and 2 deletions
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src/mesa/drivers/dri/i965/brw_vs_emit.c
+38 -2
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@@ -1184,12 +1184,13 @@ post_vs_emit( struct brw_vs_compile *c,
void brw_vs_emit(struct brw_vs_compile *c )
{
#define MAX_IF_DEPTH 32
#define MAX_LOOP_DEPTH 32
struct brw_compile *p = &c->func;
const GLuint nr_insns = c->vp->program.Base.NumInstructions;
GLuint insn, if_depth = 0;
GLuint insn, if_depth = 0, loop_depth = 0;
GLuint end_offset = 0;
struct brw_instruction *end_inst, *last_inst;
struct brw_instruction *if_inst[MAX_IF_DEPTH];
struct brw_instruction *if_inst[MAX_IF_DEPTH], *loop_inst[MAX_LOOP_DEPTH];
const struct brw_indirect stack_index = brw_indirect(0, 0);
GLuint index;
GLuint file;
@@ -1391,6 +1392,41 @@ void brw_vs_emit(struct brw_vs_compile *c )
assert(if_depth > 0);
brw_ENDIF(p, if_inst[--if_depth]);
break;
#if 0
case OPCODE_BGNLOOP:
loop_inst[loop_depth++] = brw_DO(p, BRW_EXECUTE_8);
break;
case OPCODE_BRK:
brw_BREAK(p);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
break;
case OPCODE_CONT:
brw_CONT(p);
brw_set_predicate_control(p, BRW_PREDICATE_NONE);
break;
case OPCODE_ENDLOOP:
{
struct brw_instruction *inst0, *inst1;
loop_depth--;
inst0 = inst1 = brw_WHILE(p, loop_inst[loop_depth]);
/* patch all the BREAK/CONT instructions from last BEGINLOOP */
while (inst0 > loop_inst[loop_depth]) {
inst0--;
if (inst0->header.opcode == BRW_OPCODE_BREAK) {
inst0->bits3.if_else.jump_count = inst1 - inst0 + 1;
inst0->bits3.if_else.pop_count = 0;
}
else if (inst0->header.opcode == BRW_OPCODE_CONTINUE) {
inst0->bits3.if_else.jump_count = inst1 - inst0;
inst0->bits3.if_else.pop_count = 0;
}
}
}
break;
#else
(void) loop_inst;
(void) loop_depth;
#endif
case OPCODE_BRA:
brw_set_predicate_control(p, BRW_PREDICATE_NORMAL);
brw_ADD(p, brw_ip_reg(), brw_ip_reg(), brw_imm_d(1*16));