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

/* ===-- aeabi_div0.c - ARM Runtime ABI support routines for compiler-rt ---===
 *
 *                     The LLVM Compiler Infrastructure
 *
 * This file is dual licensed under the MIT and the University of Illinois Open
 * Source Licenses. See LICENSE.TXT for details.
 *
 * ===----------------------------------------------------------------------===
 *
 * This file implements the division by zero helper routines as specified by the
 * Run-time ABI for the ARM Architecture.
 *
 * ===----------------------------------------------------------------------===
 */

/*
 * §4.3.2 - Division by zero
 *
 * The *div0 functions:
 * - Return the value passed to them as a parameter
 * - Or, return a fixed value defined by the execution environment (such as 0)
 * - Or, raise a signal (often SIGFPE) or throw an exception, and do not return
 *
 * An application may provide its own implementations of the *div0 functions to
 * for a particular behaviour from the *div and *divmod functions called out of
 * line.
 */

/* provide an unused declaration to pacify pendantic compilation */
extern unsigned char declaration;

#if defined(__ARM_EABI__)
int __attribute__((weak)) __attribute__((visibility("hidden")))
__aeabi_idiv0(int return_value) {
  return return_value;
}

long long __attribute__((weak)) __attribute__((visibility("hidden")))
__aeabi_ldiv0(long long return_value) {
  return return_value;
}
#endif