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| author | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
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| committer | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
| commit | 870837e3e92f721a44db51308f2b900d928fb04f (patch) | |
| tree | 9f851f7f6da4a4d9010d26bf17881d3bc5320f2b /contrib/compiler-rt/lib/moddi3.c | |
| parent | a1b6fa69a6f674978270e402b8bba6552e152066 (diff) | |
| parent | 653bb6745595746d04ad4acacaaab66caaaeb69b (diff) | |
| download | FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.zip FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.tar.gz | |
Import libcompiler_rt into HEAD and add Makefiles.
Obtained from: user/ed/compiler-rt
Diffstat (limited to 'contrib/compiler-rt/lib/moddi3.c')
| -rw-r--r-- | contrib/compiler-rt/lib/moddi3.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/moddi3.c b/contrib/compiler-rt/lib/moddi3.c new file mode 100644 index 0000000..4533555 --- /dev/null +++ b/contrib/compiler-rt/lib/moddi3.c @@ -0,0 +1,32 @@ +/*===-- moddi3.c - Implement __moddi3 -------------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __moddi3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" + +du_int __udivmoddi4(du_int a, du_int b, du_int* rem); + +/* Returns: a % b */ + +di_int +__moddi3(di_int a, di_int b) +{ + const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; + di_int s = b >> bits_in_dword_m1; /* s = b < 0 ? -1 : 0 */ + b = (b ^ s) - s; /* negate if s == -1 */ + s = a >> bits_in_dword_m1; /* s = a < 0 ? -1 : 0 */ + a = (a ^ s) - s; /* negate if s == -1 */ + di_int r; + __udivmoddi4(a, b, (du_int*)&r); + return (r ^ s) - s; /* negate if s == -1 */ +} |
