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

   1 /* ===-- aeabi_div0.c - ARM Runtime ABI support routines for compiler-rt ---===
   2  *
   3  *                     The LLVM Compiler Infrastructure
   4  *
   5  * This file is dual licensed under the MIT and the University of Illinois Open
   6  * Source Licenses. See LICENSE.TXT for details.
   7  *
   8  * ===----------------------------------------------------------------------===
   9  *
  10  * This file implements the division by zero helper routines as specified by the
  11  * Run-time ABI for the ARM Architecture.
  12  *
  13  * ===----------------------------------------------------------------------===
  14  */
  15
  16 /*
  17  * RTABI 4.3.2 - Division by zero
  18  *
  19  * The *div0 functions:
  20  * - Return the value passed to them as a parameter
  21  * - Or, return a fixed value defined by the execution environment (such as 0)
  22  * - Or, raise a signal (often SIGFPE) or throw an exception, and do not return
  23  *
  24  * An application may provide its own implementations of the *div0 functions to
  25  * for a particular behaviour from the *div and *divmod functions called out of
  26  * line.
  27  */
  28
  29 /* provide an unused declaration to pacify pendantic compilation */
  30 extern unsigned char declaration;
  31
  32 #if defined(__ARM_EABI__)
  33 int __attribute__((weak)) __attribute__((visibility("hidden")))
  34 __aeabi_idiv0(int return_value) {
  35   return return_value;
  36 }
  37
  38 long long __attribute__((weak)) __attribute__((visibility("hidden")))
  39 __aeabi_ldiv0(long long return_value) {
  40   return return_value;
  41 }
  42 #endif
  43