compiler-rt/lib/builtins/arm/aeabi_div0.c

   1 //===-- aeabi_div0.c - ARM Runtime ABI support routines for compiler-rt ---===//
   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 division by zero helper routines as specified by the
  10 // Run-time ABI for the ARM Architecture.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 // RTABI 4.3.2 - Division by zero
  15 //
  16 // The *div0 functions:
  17 // - Return the value passed to them as a parameter
  18 // - Or, return a fixed value defined by the execution environment (such as 0)
  19 // - Or, raise a signal (often SIGFPE) or throw an exception, and do not return
  20 //
  21 // An application may provide its own implementations of the *div0 functions to
  22 // for a particular behaviour from the *div and *divmod functions called out of
  23 // line.
  24
  25 #include "../int_lib.h"
  26
  27 // provide an unused declaration to pacify pendantic compilation
  28 extern unsigned char declaration;
  29
  30 #if defined(__ARM_EABI__)
  31 AEABI_RTABI int __attribute__((weak)) __attribute__((visibility("hidden")))
  32 __aeabi_idiv0(int return_value) {
  33   return return_value;
  34 }
  35
  36 AEABI_RTABI long long __attribute__((weak))
  37 __attribute__((visibility("hidden"))) __aeabi_ldiv0(long long return_value) {
  38   return return_value;
  39 }
  40 #endif