| 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 |
|---|
| 41 | |
|---|
