From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Wed, 26 Feb 2020 14:09:40 +0000 (+0100)
Subject: ac/llvm: fix 16-bit fmed3 on GFX8 and older gens
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=30ac733680c3dfbfd1300c5498dd1b0c0a680905;p=mesa.git

ac/llvm: fix 16-bit fmed3 on GFX8 and older gens

16-bit med3 is only supported on GFX9+.

Fixes dEQP-VK.spirv_assembly.instruction.amd_trinary_minmax.mid3.f16.*.

Fixes: d6a07732c9c ("ac: use llvm.amdgcn.fmed3 intrinsic for nir_op_fmed3")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3962>
---

diff --git a/src/amd/llvm/ac_llvm_build.c b/src/amd/llvm/ac_llvm_build.c
index db7964d6aa9..116abf942c2 100644
--- a/src/amd/llvm/ac_llvm_build.c
+++ b/src/amd/llvm/ac_llvm_build.c
@@ -2725,8 +2725,10 @@ LLVMValueRef ac_build_fmed3(struct ac_llvm_context *ctx, LLVMValueRef src0,
 {
 	LLVMValueRef result;
 
-	if (bitsize == 64) {
-		/* Lower 64-bit fmed because LLVM doesn't expose an intrinsic. */
+	if (bitsize == 64 || (bitsize == 16 && ctx->chip_class <= GFX8)) {
+		/* Lower 64-bit fmed because LLVM doesn't expose an intrinsic,
+		 * or lower 16-bit fmed because it's only supported on GFX9+.
+		 */
 		LLVMValueRef min1, min2, max1;
 
 		min1 = ac_build_fmin(ctx, src0, src1);