30 lines
819 B
C
30 lines
819 B
C
//===-- subvsi3.c - Implement __subvsi3 -----------------------------------===//
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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 __subvsi3 for the compiler_rt library.
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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 si_int __subvsi3(si_int a, si_int b) {
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si_int s = (su_int)a - (su_int)b;
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if (b >= 0) {
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if (s > a)
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compilerrt_abort();
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} else {
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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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