[Mesa-dev] [PATCH v2 30/41] ac/nir: make ac_build_bitfield_reverse work on all bit sizes

[Rhys Perry]

Signed-off-by: Rhys Perry <pendingchao...@gmail.com>
---
 src/amd/common/ac_llvm_build.c | 26 ++++++--------------------
 1 file changed, 6 insertions(+), 20 deletions(-)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 46738faea9d..dff369aae7f 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -2100,28 +2100,14 @@ LLVMValueRef ac_build_bit_count(struct ac_llvm_context 
*ctx, LLVMValueRef src0)
 LLVMValueRef ac_build_bitfield_reverse(struct ac_llvm_context *ctx,
                                       LLVMValueRef src0)
 {
-       LLVMValueRef result;
-       unsigned bitsize;
-
-       bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0));
+       unsigned bitsize = ac_get_elem_bits(ctx, LLVMTypeOf(src0));
 
-       switch (bitsize) {
-       case 32:
-               result = ac_build_intrinsic(ctx, "llvm.bitreverse.i32", 
ctx->i32,
-                                           (LLVMValueRef []) { src0 }, 1,
-                                           AC_FUNC_ATTR_READNONE);
-               break;
-       case 16:
-               result = ac_build_intrinsic(ctx, "llvm.bitreverse.i16", 
ctx->i16,
-                                           (LLVMValueRef []) { src0 }, 1,
-                                           AC_FUNC_ATTR_READNONE);
-               break;
-       default:
-               unreachable(!"invalid bitsize");
-               break;
-       }
+       char name[64];
+       snprintf(name, sizeof(name), "llvm.bitreverse.i%d", bitsize);
 
-       return result;
+       return ac_build_intrinsic(ctx, name, LLVMTypeOf(src0),
+                                 (LLVMValueRef []) { src0 }, 1,
+                                 AC_FUNC_ATTR_READNONE);
 }
 
 #define AC_EXP_TARGET          0
-- 
2.20.1

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