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/* ===-- 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 */ |