Signed-off-by: Samuel Pitoiset <[email protected]>
---
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 bf4fe3d8c64..54d91649614 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -1982,7 +1982,12 @@ ac_build_umsb(struct ac_llvm_context *ctx,
/* The HW returns the last bit index from MSB, but TGSI/NIR wants
* the index from LSB. Invert it by doing "31 - msb". */
msb = LLVMBuildSub(ctx->builder, highest_bit, msb, "");
- msb = LLVMBuildTruncOrBitCast(ctx->builder, msb, ctx->i32, "");
+
+ if (bitsize == 64) {
+ msb = LLVMBuildTrunc(ctx->builder, msb, ctx->i32, "");
+ } else if (bitsize == 16) {
+ msb = LLVMBuildSExt(ctx->builder, msb, ctx->i32, "");
+ }
/* check for zero */
return LLVMBuildSelect(ctx->builder,
--
2.21.0
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