1 //===- AArch64GlobalISelUtils.h ----------------------------------*- C++ -*-==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file APIs for AArch64-specific helper functions used in the GlobalISel
9 /// pipeline.
10 //===----------------------------------------------------------------------===//
11 
12 #ifndef LLVM_LIB_TARGET_AARCH64_GISEL_AARCH64GLOBALISELUTILS_H
13 #define LLVM_LIB_TARGET_AARCH64_GISEL_AARCH64GLOBALISELUTILS_H
14 
15 #include <cstdint>
16 
17 namespace llvm {
18 namespace AArch64GISelUtils {
19 
20 /// \returns true if \p C is a legal immediate operand for an arithmetic
21 /// instruction.
isLegalArithImmed(const uint64_t C)22 constexpr bool isLegalArithImmed(const uint64_t C) {
23   return (C >> 12 == 0) || ((C & 0xFFFULL) == 0 && C >> 24 == 0);
24 }
25 
26 } // namespace AArch64GISelUtils
27 } // namespace llvm
28 
29 #endif
30