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author | Ed Schouten <ed@FreeBSD.org> | 2010-10-21 19:02:02 +0000 |
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committer | Ed Schouten <ed@FreeBSD.org> | 2010-10-21 19:02:02 +0000 |
commit | 217b614317dad692116a3a06fe94ea8f61a59edb (patch) | |
tree | 4cfe2eee875a959effca0881df14c079103447fa /lib/subvsi3.c | |
download | src-217b614317dad692116a3a06fe94ea8f61a59edb.tar.gz src-217b614317dad692116a3a06fe94ea8f61a59edb.zip |
Notes
Diffstat (limited to 'lib/subvsi3.c')
-rw-r--r-- | lib/subvsi3.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/subvsi3.c b/lib/subvsi3.c new file mode 100644 index 000000000000..ce39c815b86e --- /dev/null +++ b/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; +} |