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ac/llvm: use min+max instead of AMDGPU.clamp on LLVM 5.0

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It selects v_med3_f32, which has the same rate & size.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2017-02-16 22:52:53 +01:00
parent 660b55e6d9
commit 675ef9c0c7
1 changed files with 17 additions and 0 deletions
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17
src/amd/common/ac_llvm_build.c
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@ -817,6 +817,23 @@ ac_emit_umsb(struct ac_llvm_context *ctx,
LLVMValueRef ac_emit_clamp(struct ac_llvm_context *ctx, LLVMValueRef value)
{
if (HAVE_LLVM >= 0x0500) {
LLVMValueRef max[2] = {
value,
LLVMConstReal(ctx->f32, 0),
};
LLVMValueRef min[2] = {
LLVMConstReal(ctx->f32, 1),
};
min[1] = ac_emit_llvm_intrinsic(ctx, "llvm.maxnum.f32",
ctx->f32, max, 2,
AC_FUNC_ATTR_READNONE);
return ac_emit_llvm_intrinsic(ctx, "llvm.minnum.f32",
ctx->f32, min, 2,
AC_FUNC_ATTR_READNONE);
}
const char *intr = HAVE_LLVM >= 0x0308 ? "llvm.AMDGPU.clamp." :
"llvm.AMDIL.clamp.";
LLVMValueRef args[3] = {