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author | Daniel Dunbar <daniel@zuster.org> | 2009-06-26 16:47:03 +0000 |
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committer | Daniel Dunbar <daniel@zuster.org> | 2009-06-26 16:47:03 +0000 |
commit | b3a6901e66f55b35aa9e01bcb24134e6a65ea004 (patch) | |
tree | 4d57d73575ea3f7e30bf430920d6e96fa2a369c1 /lib/negvdi2.c | |
parent | 8cbe163cba77c772621f89ddb33793ac170b1fa2 (diff) |
Initial import of compiler-rt.
-
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@74292 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/negvdi2.c')
-rw-r--r-- | lib/negvdi2.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/negvdi2.c b/lib/negvdi2.c new file mode 100644 index 000000000..eb9f6e916 --- /dev/null +++ b/lib/negvdi2.c @@ -0,0 +1,28 @@ +//===-- negvdi2.c - Implement __negvdi2 -----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements __negvdi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" +#include <stdlib.h> + +// Returns: -a + +// Effects: aborts if -a overflows + +di_int +__negvdi2(di_int a) +{ + const di_int MIN = (di_int)1 << ((int)(sizeof(di_int) * CHAR_BIT)-1); + if (a == MIN) + abort(); + return -a; +} |