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/* ===-- subvdi3.c - Implement __subvdi3 -----------------------------------===
*
* 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 __subvdi3 for the compiler_rt library.
*
* ===----------------------------------------------------------------------===
*/
#include "int_lib.h"
/* Returns: a - b */
/* Effects: aborts if a - b overflows */
COMPILER_RT_ABI di_int
__subvdi3(di_int a, di_int b)
{
di_int s = (du_int) a - (du_int) b;
if (b >= 0)
{
if (s > a)
compilerrt_abort();
}
else
{
if (s <= a)
compilerrt_abort();
}
return s;
}
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