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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 08:02:35 +1030 |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 08:02:35 +1030 |
commit | 33edcf133ba93ecba2e4b6472e97b689895d805c (patch) | |
tree | 327d7a20acef64005e7c5ccbfa1265be28aeb6ac /arch/sh/lib/ashrdi3.c | |
parent | be4d638c1597580ed2294d899d9f1a2cd10e462c (diff) | |
parent | 3c92ec8ae91ecf59d88c798301833d7cf83f2179 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'arch/sh/lib/ashrdi3.c')
-rw-r--r-- | arch/sh/lib/ashrdi3.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/sh/lib/ashrdi3.c b/arch/sh/lib/ashrdi3.c new file mode 100644 index 00000000000..c884a912b66 --- /dev/null +++ b/arch/sh/lib/ashrdi3.c @@ -0,0 +1,31 @@ +#include <linux/module.h> + +#include "libgcc.h" + +long long __ashrdi3(long long u, word_type b) +{ + DWunion uu, w; + word_type bm; + + if (b == 0) + return u; + + uu.ll = u; + bm = 32 - b; + + if (bm <= 0) { + /* w.s.high = 1..1 or 0..0 */ + w.s.high = + uu.s.high >> 31; + w.s.low = uu.s.high >> -bm; + } else { + const unsigned int carries = (unsigned int) uu.s.high << bm; + + w.s.high = uu.s.high >> b; + w.s.low = ((unsigned int) uu.s.low >> b) | carries; + } + + return w.ll; +} + +EXPORT_SYMBOL(__ashrdi3); |