aeabi_div0.c revision ab6cdf0a219f3d52f6b2b943cae03f6e9859c678 
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 * §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 */
30extern unsigned char declaration;
31
32#if defined(__ARM_EABI__)
33int __attribute__((weak)) __attribute__((visibility("hidden")))
34__aeabi_idiv0(int return_value) {
35  return return_value;
36}
37
38long long __attribute__((weak)) __attribute__((visibility("hidden")))
39__aeabi_ldiv0(long long return_value) {
40  return return_value;
41}
42#endif
43
44