[Mesa-dev] [PATCH 4/4] radeon/ac: use llvm.amdgcn.sffbh intrinsic instead of AMDGPU.flbit.i32

[Marek Olšák]

For 1, 3, 4:

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Thu, Feb 16, 2017 at 4:48 AM, Dave Airlie <airlied at gmail.com> wrote:
> From: Dave Airlie <airlied at redhat.com>
>
> Use the newer intrinsic.
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>
> ---
>  src/amd/common/ac_llvm_build.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
> index 180fd24..dda2c0b 100644
> --- a/src/amd/common/ac_llvm_build.c
> +++ b/src/amd/common/ac_llvm_build.c
> @@ -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);
>
> --
> 2.7.4
>
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