Mesa (master): gallivm: Use SSE4.1' s BLENDV instructions for lp_build_select().
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Tue Jul 6 10:55:35 UTC 2010
Module: Mesa
Branch: master
Commit: 88b6abfba5e95866877dd3939ae43c6dfd71422c
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=88b6abfba5e95866877dd3939ae43c6dfd71422c
Author: José Fonseca <jfonseca at vmware.com>
Date: Mon Jun 14 16:23:13 2010 +0100
gallivm: Use SSE4.1's BLENDV instructions for lp_build_select().
---
src/gallium/auxiliary/gallivm/lp_bld_logic.c | 41 ++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_logic.c b/src/gallium/auxiliary/gallivm/lp_bld_logic.c
index 7f41764..39854e4 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_logic.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_logic.c
@@ -34,6 +34,7 @@
#include "util/u_cpu_detect.h"
+#include "util/u_memory.h"
#include "util/u_debug.h"
#include "lp_bld_type.h"
@@ -382,6 +383,46 @@ lp_build_select(struct lp_build_context *bld,
mask = LLVMBuildTrunc(bld->builder, mask, LLVMInt1Type(), "");
res = LLVMBuildSelect(bld->builder, mask, a, b, "");
}
+ else if (util_cpu_caps.has_sse4_1 &&
+ type.width * type.length == 128 &&
+ !LLVMIsConstant(a) &&
+ !LLVMIsConstant(b) &&
+ !LLVMIsConstant(mask)) {
+ const char *intrinsic;
+ LLVMTypeRef arg_type;
+ LLVMValueRef args[3];
+
+ if (type.width == 64) {
+ intrinsic = "llvm.x86.sse41.blendvpd";
+ arg_type = LLVMVectorType(LLVMDoubleType(), 2);
+ } else if (type.width == 32) {
+ intrinsic = "llvm.x86.sse41.blendvps";
+ arg_type = LLVMVectorType(LLVMFloatType(), 4);
+ } else {
+ intrinsic = "llvm.x86.sse41.pblendvb";
+ arg_type = LLVMVectorType(LLVMInt8Type(), 16);
+ }
+
+ if (arg_type != bld->int_vec_type) {
+ mask = LLVMBuildBitCast(bld->builder, mask, arg_type, "");
+ }
+
+ if (arg_type != bld->vec_type) {
+ a = LLVMBuildBitCast(bld->builder, a, arg_type, "");
+ b = LLVMBuildBitCast(bld->builder, b, arg_type, "");
+ }
+
+ args[0] = b;
+ args[1] = a;
+ args[2] = mask;
+
+ res = lp_build_intrinsic(bld->builder, intrinsic,
+ arg_type, args, Elements(args));
+
+ if (arg_type != bld->vec_type) {
+ res = LLVMBuildBitCast(bld->builder, res, bld->vec_type, "");
+ }
+ }
else {
if(type.floating) {
LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
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