contrib/llvm-project/compiler-rt/lib/builtins/arm/sync_fetch_and_sub_4.S

   1 //===-- sync_fetch_and_sub_4.S - ------------------------------------------===//
   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 //
   9 // This file implements the __sync_fetch_and_sub_4 function for the ARM
  10 // architecture.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "sync-ops.h"
  15
  16 // "subs" is 2 bytes shorter than "sub".
  17 #define sub_4(rD, rN, rM)  sub rD, rN, rM
  18
  19 SYNC_OP_4(sub_4)
  20
  21 NO_EXEC_STACK_DIRECTIVE
  22