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ec9a8c8b10
The code in {add,sub}v.i3 routines does not trap when it should, because
it performs the actual add/subtract operation in signed arithmetic,
rather than unsigned.
Patch by Francois-Xavie Coudert!
llvm-svn: 221826
41 lines
909 B
C
41 lines
909 B
C
/* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
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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 __addvti3 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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__addvti3(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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