radeon/ac: use llvm.amdgcn.sffbh intrinsic instead of AMDGPU.flbit.i32
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>
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@ -769,7 +769,8 @@ ac_emit_imsb(struct ac_llvm_context *ctx,
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LLVMValueRef arg,
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LLVMTypeRef dst_type)
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{
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LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, "llvm.AMDGPU.flbit.i32",
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const char *intr_name = (HAVE_LLVM < 0x0400) ? "llvm.AMDGPU.flbit.i32" : "llvm.amdgcn.sffbh";
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LLVMValueRef msb = ac_emit_llvm_intrinsic(ctx, intr_name,
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dst_type, &arg, 1,
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AC_FUNC_ATTR_READNONE);
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