| Daniel Dunbar | b3a6901 | 2009-06-26 16:47:03 +0000 | [diff] [blame^] | 1 | //===-- addvdi3.c - Implement __addvdi3 -----------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements __addvdi3 for the compiler_rt library. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "int_lib.h" |
| 15 | #include <stdlib.h> |
| 16 | |
| 17 | // Returns: a + b |
| 18 | |
| 19 | // Effects: aborts if a + b overflows |
| 20 | |
| 21 | di_int |
| 22 | __addvdi3(di_int a, di_int b) |
| 23 | { |
| 24 | di_int s = a + b; |
| 25 | if (b >= 0) |
| 26 | { |
| 27 | if (s < a) |
| 28 | abort(); |
| 29 | } |
| 30 | else |
| 31 | { |
| 32 | if (s >= a) |
| 33 | abort(); |
| 34 | } |
| 35 | return s; |
| 36 | } |