ac: add 8-bit and 16-bit supports to get_reduction_identity()

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

diff --git a/src/amd/llvm/ac_llvm_build.c b/src/amd/llvm/ac_llvm_build.c
index 241cbba2dc8464f5b30eb95781e7a42be1db4ad5..641587051b8452a6da06c5f449bb7c3bfd7ec4bf 100644 (file)
--- a/src/amd/llvm/ac_llvm_build.c
+++ b/src/amd/llvm/ac_llvm_build.c
@@ -3904,7 +3904,39 @@ ac_build_set_inactive(struct ac_llvm_context *ctx, LLVMValueRef src,
 static LLVMValueRef
 get_reduction_identity(struct ac_llvm_context *ctx, nir_op op, unsigned type_size)
 {
-       if (type_size == 4) {
+       if (type_size == 1) {
+               switch (op) {
+               case nir_op_iadd: return ctx->i8_0;
+               case nir_op_imul: return ctx->i8_1;
+               case nir_op_imin: return LLVMConstInt(ctx->i8, INT8_MAX, 0);
+               case nir_op_umin: return LLVMConstInt(ctx->i8, UINT8_MAX, 0);
+               case nir_op_imax: return LLVMConstInt(ctx->i8, INT8_MIN, 0);
+               case nir_op_umax: return ctx->i8_0;
+               case nir_op_iand: return LLVMConstInt(ctx->i8, -1, 0);
+               case nir_op_ior: return ctx->i8_0;
+               case nir_op_ixor: return ctx->i8_0;
+               default:
+                       unreachable("bad reduction intrinsic");
+               }
+       } else if (type_size == 2) {
+               switch (op) {
+               case nir_op_iadd: return ctx->i16_0;
+               case nir_op_fadd: return ctx->f16_0;
+               case nir_op_imul: return ctx->i16_1;
+               case nir_op_fmul: return ctx->f16_1;
+               case nir_op_imin: return LLVMConstInt(ctx->i16, INT16_MAX, 0);
+               case nir_op_umin: return LLVMConstInt(ctx->i16, UINT16_MAX, 0);
+               case nir_op_fmin: return LLVMConstReal(ctx->f16, INFINITY);
+               case nir_op_imax: return LLVMConstInt(ctx->i16, INT16_MIN, 0);
+               case nir_op_umax: return ctx->i16_0;
+               case nir_op_fmax: return LLVMConstReal(ctx->f16, -INFINITY);
+               case nir_op_iand: return LLVMConstInt(ctx->i16, -1, 0);
+               case nir_op_ior: return ctx->i16_0;
+               case nir_op_ixor: return ctx->i16_0;
+               default:
+                       unreachable("bad reduction intrinsic");
+               }
+       } else if (type_size == 4) {
                switch (op) {
                case nir_op_iadd: return ctx->i32_0;
                case nir_op_fadd: return ctx->f32_0;