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//===-- subvti3.c - Implement __subvti3 -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements __subvti3 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#ifdef CRT_HAS_128BIT
// Returns: a - b
// Effects: aborts if a - b overflows
COMPILER_RT_ABI ti_int __subvti3(ti_int a, ti_int b) {
ti_int s = (tu_int)a - (tu_int)b;
if (b >= 0) {
if (s > a)
compilerrt_abort();
} else {
if (s <= a)
compilerrt_abort();
}
return s;
}
#endif // CRT_HAS_128BIT
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