From: Dave Airlie <airlied@redhat.com>
Date: Thu, 16 Feb 2017 03:46:16 +0000 (+0000)
Subject: radeon/ac: use llvm.amdgcn.sffbh intrinsic instead of AMDGPU.flbit.i32
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4617ad07e066c70950a1ace34ab62b6209db8836;p=mesa.git

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>
---

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 180fd2414a5..dda2c0b9421 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);