diff options
Diffstat (limited to 'lib/addvsi3.c')
-rw-r--r-- | lib/addvsi3.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/addvsi3.c b/lib/addvsi3.c new file mode 100644 index 000000000..0eb10c242 --- /dev/null +++ b/lib/addvsi3.c @@ -0,0 +1,36 @@ +//===-- addvsi3.c - Implement __addvsi3 -----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements __addvsi3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" +#include <stdlib.h> + +// Returns: a + b + +// Effects: aborts if a + b overflows + +si_int +__addvsi3(si_int a, si_int b) +{ + si_int s = a + b; + if (b >= 0) + { + if (s < a) + abort(); + } + else + { + if (s >= a) + abort(); + } + return s; +} |