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Diffstat (limited to 'contrib/compiler-rt/lib/subvsi3.c')
-rw-r--r-- | contrib/compiler-rt/lib/subvsi3.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/subvsi3.c b/contrib/compiler-rt/lib/subvsi3.c new file mode 100644 index 0000000..ce39c81 --- /dev/null +++ b/contrib/compiler-rt/lib/subvsi3.c @@ -0,0 +1,37 @@ +/* ===-- subvsi3.c - Implement __subvsi3 -----------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __subvsi3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" +#include <stdlib.h> + +/* Returns: a - b */ + +/* Effects: aborts if a - b overflows */ + +si_int +__subvsi3(si_int a, si_int b) +{ + si_int s = a - b; + if (b >= 0) + { + if (s > a) + compilerrt_abort(); + } + else + { + if (s <= a) + compilerrt_abort(); + } + return s; +} |