forked from OSchip/llvm-project
36 lines
870 B
C
36 lines
870 B
C
/* ===-- subvdi3.c - Implement __subvdi3 -----------------------------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __subvdi3 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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/* Returns: a - b */
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/* Effects: aborts if a - b overflows */
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COMPILER_RT_ABI di_int
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__subvdi3(di_int a, di_int b)
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{
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di_int s = (du_int) a - (du_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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