/* ===-- subvsi3.c - Implement __subvsi3 -----------------------------------===
|
*
|
* 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 __subvsi3 for the compiler_rt library.
|
*
|
* ===----------------------------------------------------------------------===
|
*/
|
|
#include "int_lib.h"
|
|
/* Returns: a - b */
|
|
/* Effects: aborts if a - b overflows */
|
|
COMPILER_RT_ABI si_int
|
__subvsi3(si_int a, si_int b)
|
{
|
si_int s = (su_int) a - (su_int) b;
|
if (b >= 0)
|
{
|
if (s > a)
|
compilerrt_abort();
|
}
|
else
|
{
|
if (s <= a)
|
compilerrt_abort();
|
}
|
return s;
|
}
|
