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Diffstat (limited to 'contrib/compiler-rt/lib/subvdi3.c')
-rw-r--r-- | contrib/compiler-rt/lib/subvdi3.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/subvdi3.c b/contrib/compiler-rt/lib/subvdi3.c new file mode 100644 index 000000000000..0f1f924effc7 --- /dev/null +++ b/contrib/compiler-rt/lib/subvdi3.c @@ -0,0 +1,36 @@ +/* ===-- subvdi3.c - Implement __subvdi3 -----------------------------------=== + * + * 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 __subvdi3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" + +/* Returns: a - b */ + +/* Effects: aborts if a - b overflows */ + +COMPILER_RT_ABI di_int +__subvdi3(di_int a, di_int b) +{ + di_int s = a - b; + if (b >= 0) + { + if (s > a) + compilerrt_abort(); + } + else + { + if (s <= a) + compilerrt_abort(); + } + return s; +} |