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Diffstat (limited to 'contrib/compiler-rt/lib/builtins/negvsi2.c')
-rw-r--r-- | contrib/compiler-rt/lib/builtins/negvsi2.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/builtins/negvsi2.c b/contrib/compiler-rt/lib/builtins/negvsi2.c new file mode 100644 index 000000000000..b9e93fef06c5 --- /dev/null +++ b/contrib/compiler-rt/lib/builtins/negvsi2.c @@ -0,0 +1,28 @@ +/* ===-- negvsi2.c - Implement __negvsi2 -----------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is dual licensed under the MIT and the University of Illinois Open + * Source Licenses. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * 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; +} |