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mesa: initial support for GLSL struct/array comparisons

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This commit is contained in:
Brian Paul
2008-07-21 17:18:22 -06:00
parent c9a7ee2d00
commit ec9c79a7dd
1 changed files with 58 additions and 15 deletions
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73
src/mesa/shader/slang/slang_emit.c
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@@ -696,29 +696,72 @@ emit_compare(slang_emit_info *emitInfo, slang_ir_node *n)
}
}
else {
/* size > 4, struct compare */
#if 0
/* size > 4, struct or array compare.
* XXX this won't work reliably for structs with padding!!
*/
GLint i, num = (n->Children[0]->Store->Size + 3) / 4;
/*printf("BEGIN COMPARE size %d\n", num);*/
slang_ir_storage accTemp;
if (!n->Store) {
if (!alloc_temp_storage(emitInfo, n, 4))
return NULL;
}
accTemp.Size = 4;
accTemp.File = PROGRAM_TEMPORARY;
if (!_slang_alloc_temp(emitInfo->vt, &accTemp)) {
return NULL;
/* out of temps */
}
for (i = 0; i < num; i++) {
inst = new_instruction(emitInfo, opcode);
/* SNE t0, left[i], right[i] */
inst = new_instruction(emitInfo, OPCODE_SNE);
inst->SrcReg[0].File = n->Children[0]->Store->File;
inst->SrcReg[0].Index = n->Children[0]->Store->Index + i;
inst->SrcReg[1].File = n->Children[1]->Store->File;
inst->SrcReg[1].Index = n->Children[1]->Store->Index + i;
inst->DstReg.File = n->Store->File;
inst->DstReg.Index = n->Store->Index;
inst->CondUpdate = 1; /* update cond code */
if (i > 0) {
inst->DstReg.CondMask = COND_NE; /* update if !=0 */
if (i == 0) {
inst->DstReg.File = accTemp.File;
inst->DstReg.Index = accTemp.Index;
inst->Comment = _mesa_strdup("Begin struct/array comparison");
}
else {
inst->DstReg.File = n->Store->File;
inst->DstReg.Index = n->Store->Index;
}
if (i > 0) {
/* ADD accTemp, accTemp, temp; # like logical-OR */
inst = new_instruction(emitInfo, OPCODE_ADD);
inst->SrcReg[0].File = accTemp.File;
inst->SrcReg[0].Index = accTemp.Index;
inst->SrcReg[1].File = n->Store->File;
inst->SrcReg[1].Index = n->Store->Index;
inst->DstReg.File = accTemp.File;
inst->DstReg.Index = accTemp.Index;
}
/*_mesa_print_instruction(inst);*/
}
storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
#endif
_mesa_problem(NULL, "struct comparison not implemented yet");
inst = NULL;
/* compute accTemp.x || accTemp.y || accTemp.z || accTemp.w with DOT4 */
inst = new_instruction(emitInfo, OPCODE_DP4);
inst->SrcReg[0].File = accTemp.File;
inst->SrcReg[0].Index = accTemp.Index;
inst->SrcReg[1].File = accTemp.File;
inst->SrcReg[1].Index = accTemp.Index;
inst->DstReg.File = n->Store->File;
inst->DstReg.Index = n->Store->Index;
inst->Comment = _mesa_strdup("End struct/array comparison");
if (n->Opcode == IR_EQUAL) {
/* compute tmp.x = !tmp.x via tmp.x = (tmp.x == 0) */
inst = new_instruction(emitInfo, OPCODE_SEQ);
storage_to_src_reg(&inst->SrcReg[0], n->Store);
constant_to_src_reg(&inst->SrcReg[1], 0.0, emitInfo);
storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
inst->Comment = _mesa_strdup("Invert true/false");
}
_slang_free_temp(emitInfo->vt, &accTemp);
}
/* free temps */