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radeon/ac: use llvm.amdgcn.sffbh intrinsic instead of AMDGPU.flbit.i32

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Use the newer intrinsic.

Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2017-02-16 03:46:16 +00:00
parent e933331cd7
commit 4617ad07e0
1 changed files with 2 additions and 1 deletions
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3
src/amd/common/ac_llvm_build.c
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@ -769,7 +769,8 @@ ac_emit_imsb(struct ac_llvm_context *ctx,
LLVMValueRef arg,
LLVMTypeRef dst_type)
{
LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, "llvm.AMDGPU.flbit.i32",
const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" : "llvm.amdgcn.sffbh";
LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, intr_name,
dst_type, &arg, 1,
AC_FUNC_ATTR_READNONE);