[Mesa-dev] [PATCH 3/6] ac: add 8-bit support to ac_find_lsb()

[Samuel Pitoiset]

Signed-off-by: Samuel Pitoiset <samuel.pitoi...@gmail.com>
---
 src/amd/common/ac_llvm_build.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 6d26ab31a66..f8d28a59cfe 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -2931,6 +2931,11 @@ LLVMValueRef ac_find_lsb(struct ac_llvm_context *ctx,
                type = ctx->i16;
                zero = ctx->i16_0;
                break;
+       case 8:
+               intrin_name = "llvm.cttz.i8";
+               type = ctx->i8;
+               zero = ctx->i8_0;
+               break;
        default:
                unreachable(!"invalid bitsize");
        }
@@ -2956,7 +2961,7 @@ LLVMValueRef ac_find_lsb(struct ac_llvm_context *ctx,
 
        if (src0_bitsize == 64) {
                lsb = LLVMBuildTrunc(ctx->builder, lsb, ctx->i32, "");
-       } else if (src0_bitsize == 16) {
+       } else if (src0_bitsize < 32) {
                lsb = LLVMBuildSExt(ctx->builder, lsb, ctx->i32, "");
        }
 
-- 
2.21.0

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