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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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