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Diffstat (limited to 'contrib/compiler-rt/lib/negvti2.c')
-rw-r--r-- | contrib/compiler-rt/lib/negvti2.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/negvti2.c b/contrib/compiler-rt/lib/negvti2.c new file mode 100644 index 0000000..d56e1e3 --- /dev/null +++ b/contrib/compiler-rt/lib/negvti2.c @@ -0,0 +1,33 @@ +/*===-- negvti2.c - Implement __negvti2 -----------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + *===----------------------------------------------------------------------=== + * + *This file implements __negvti2 for the compiler_rt library. + * + *===----------------------------------------------------------------------=== + */ + +#if __x86_64 + +#include "int_lib.h" +#include <stdlib.h> + +/* Returns: -a */ + +/* Effects: aborts if -a overflows */ + +ti_int +__negvti2(ti_int a) +{ + const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT)-1); + if (a == MIN) + compilerrt_abort(); + return -a; +} + +#endif |