ac/nir: fix nir_op_b2f16

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index f2d5275..3d2f738 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -322,10 +322,16 @@ static LLVMValueRef emit_b2f(struct ac_llvm_context *ctx,
                                           "");
        result = LLVMBuildBitCast(ctx->builder, result, ctx->f32, "");
 
-       if (bitsize == 32)
+       switch (bitsize) {
+       case 16:
+               return LLVMBuildFPTrunc(ctx->builder, result, ctx->f16, "");
+       case 32:
                return result;
-
-       return LLVMBuildFPExt(ctx->builder, result, ctx->f64, "");
+       case 64:
+               return LLVMBuildFPExt(ctx->builder, result, ctx->f64, "");
+       default:
+               unreachable("Unsupported bit size.");
+       }
 }
 
 static LLVMValueRef emit_f2b(struct ac_llvm_context *ctx,