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Diffstat (limited to 'compiler-rt/lib/builtins/negvsi2.c')
-rw-r--r-- | compiler-rt/lib/builtins/negvsi2.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/negvsi2.c b/compiler-rt/lib/builtins/negvsi2.c new file mode 100644 index 000000000000..cccdee6dc5e5 --- /dev/null +++ b/compiler-rt/lib/builtins/negvsi2.c @@ -0,0 +1,24 @@ +//===-- negvsi2.c - Implement __negvsi2 -----------------------------------===// +// +// 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 __negvsi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +// Returns: -a + +// Effects: aborts if -a overflows + +COMPILER_RT_ABI si_int __negvsi2(si_int a) { + const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1); + if (a == MIN) + compilerrt_abort(); + return -a; +} |