41 lines
902 B
C
41 lines
902 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 dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. 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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#include "int_lib.h"
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#ifdef CRT_HAS_128BIT
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/* Returns: a - b */
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/* Effects: aborts if a - b overflows */
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COMPILER_RT_ABI ti_int
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__subvti3(ti_int a, ti_int b)
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{
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ti_int s = (tu_int) a - (tu_int) 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 /* CRT_HAS_128BIT */
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