f287008791
- Fiddling with abort directly is annoying given the way we use system includes, although it would be nice to fix this so we could make sure calling abort directly is verboten. llvm-svn: 100014
42 lines
858 B
C
42 lines
858 B
C
/* ===-- subvti3.c - Implement __subvti3 -----------------------------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is distributed under the University of Illinois Open Source
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* License. See LICENSE.TXT for details.
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __subvti3 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#if __x86_64
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#include "int_lib.h"
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#include <stdlib.h>
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/* Returns: a - b */
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/* Effects: aborts if a - b overflows */
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ti_int
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__subvti3(ti_int a, ti_int b)
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{
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ti_int s = a - b;
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if (b >= 0)
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{
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if (s > a)
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compilerrt_abort();
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}
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else
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{
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if (s <= a)
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compilerrt_abort();
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}
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return s;
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}
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#endif /* __x86_64 */
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