diff options
Diffstat (limited to 'src/llvm_backend_proc.cpp')
| -rw-r--r-- | src/llvm_backend_proc.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/llvm_backend_proc.cpp b/src/llvm_backend_proc.cpp index dbdc51078..c433334d1 100644 --- a/src/llvm_backend_proc.cpp +++ b/src/llvm_backend_proc.cpp @@ -1353,6 +1353,41 @@ lbValue lb_build_builtin_simd_proc(lbProcedure *p, Ast *expr, TypeAndValue const return res; } + case BuiltinProc_simd_rotate_left: + case BuiltinProc_simd_rotate_right: + { + + i64 count = get_array_type_count(arg0.type); + GB_ASSERT(is_power_of_two(count)); + BigInt bi_count = {}; + big_int_from_i64(&bi_count, count); + + TypeAndValue const &tv = ce->args[1]->tav; + ExactValue val = exact_value_to_integer(tv.value); + GB_ASSERT(val.kind == ExactValue_Integer); + BigInt *bi = &val.value_integer; + if (builtin_id == BuiltinProc_simd_rotate_right) { + big_int_neg(bi, bi); + } + big_int_rem(bi, bi, &bi_count); + big_int_dealloc(&bi_count); + + i64 left = big_int_to_i64(bi); + + LLVMValueRef *values = gb_alloc_array(temporary_allocator(), LLVMValueRef, count); + LLVMTypeRef llvm_u32 = lb_type(m, t_u32); + for (i64 i = 0; i < count; i++) { + u64 idx = cast(u64)(i+left) & cast(u64)(count-1); + values[i] = LLVMConstInt(llvm_u32, idx, false); + } + LLVMValueRef mask = LLVMConstVector(values, cast(unsigned)count); + + LLVMValueRef v = arg0.value; + res.value = LLVMBuildShuffleVector(p->builder, v, v, mask, ""); + return res; + } + + case BuiltinProc_simd_add_sat: case BuiltinProc_simd_sub_sat: { |