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llvmpipe: Better abs for floating points.

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This commit is contained in:
José Fonseca
2009-09-07 14:53:15 +01:00
parent e4c76c02f7
commit 1127201088
1 changed files with 17 additions and 6 deletions
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src/gallium/drivers/llvmpipe/lp_bld_arit.c
+17 -6
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@@ -591,20 +591,31 @@ lp_build_abs(struct lp_build_context *bld,
LLVMValueRef a)
{
const union lp_type type = bld->type;
LLVMTypeRef vec_type = lp_build_vec_type(type);
if(!type.sign)
return a;
/* XXX: is this really necessary? */
if(type.floating) {
/* Mask out the sign bit */
LLVMTypeRef int_vec_type = lp_build_int_vec_type(type);
LLVMValueRef mask = lp_build_int_const_scalar(type, ((unsigned long long)1 << type.width) - 1);
a = LLVMBuildBitCast(bld->builder, a, int_vec_type, "");
a = LLVMBuildAnd(bld->builder, a, mask, "");
a = LLVMBuildBitCast(bld->builder, a, vec_type, "");
return a;
}
#if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
if(!type.floating && type.width*type.length == 128) {
LLVMTypeRef vec_type = lp_build_vec_type(type);
if(type.width == 8)
if(type.width*type.length == 128) {
switch(type.width) {
case 8:
return lp_build_intrinsic_unary(bld->builder, "llvm.x86.ssse3.pabs.b.128", vec_type, a);
if(type.width == 16)
case 16:
return lp_build_intrinsic_unary(bld->builder, "llvm.x86.ssse3.pabs.w.128", vec_type, a);
if(type.width == 32)
case 32:
return lp_build_intrinsic_unary(bld->builder, "llvm.x86.ssse3.pabs.d.128", vec_type, a);
}
}
#endif