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r600g/llvm: Undefines unrequired texture coord values

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This is a port of "r600g:mask unused source components for SAMPLE"
patch from Vadim Girlin.
This commit is contained in:
Vincent Lejeune 2013-04-30 15:58:00 +02:00
parent c4150123aa
commit b42fe195a2
1 changed files with 28 additions and 1 deletions
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29
src/gallium/drivers/r600/r600_llvm.c
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@ -429,9 +429,36 @@ static void llvm_emit_tex(
}
}
if (emit_data->inst->Instruction.Opcode == TGSI_OPCODE_TEX) {
LLVMValueRef Vector[4] = {
LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
lp_build_const_int32(gallivm, 0), ""),
LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
lp_build_const_int32(gallivm, 1), ""),
LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
lp_build_const_int32(gallivm, 2), ""),
LLVMBuildExtractElement(gallivm->builder, emit_data->args[0],
lp_build_const_int32(gallivm, 3), ""),
};
switch (emit_data->inst->Texture.Texture) {
case TGSI_TEXTURE_2D:
case TGSI_TEXTURE_RECT:
Vector[2] = Vector[3] = LLVMGetUndef(bld_base->base.elem_type);
break;
case TGSI_TEXTURE_1D:
Vector[1] = Vector[2] = Vector[3] = LLVMGetUndef(bld_base->base.elem_type);
break;
default:
break;
}
args[0] = lp_build_gather_values(gallivm, Vector, 4);
} else {
args[0] = emit_data->args[0];
}
assert(emit_data->arg_count + 2 <= Elements(args));
for (c = 0; c < emit_data->arg_count; ++c)
for (c = 1; c < emit_data->arg_count; ++c)
args[c] = emit_data->args[c];
sampler_src = emit_data->inst->Instruction.NumSrcRegs-1;