diff options
Diffstat (limited to 'lib/negvsi2.c')
-rw-r--r-- | lib/negvsi2.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/negvsi2.c b/lib/negvsi2.c new file mode 100644 index 000000000..7e42655e6 --- /dev/null +++ b/lib/negvsi2.c @@ -0,0 +1,28 @@ +//===-- negvsi2.c - Implement __negvsi2 -----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements __negvsi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" +#include <stdlib.h> + +// Returns: -a + +// Effects: aborts if -a overflows + +si_int +__negvsi2(si_int a) +{ + const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT)-1); + if (a == MIN) + abort(); + return -a; +} |