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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/lib/memset.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68k/lib/memset.c')
-rw-r--r-- | arch/m68k/lib/memset.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/m68k/lib/memset.c b/arch/m68k/lib/memset.c new file mode 100644 index 0000000..d55fdb2 --- /dev/null +++ b/arch/m68k/lib/memset.c @@ -0,0 +1,68 @@ +#include <linux/types.h> + +void * memset(void * s, int c, size_t count) +{ + void *xs = s; + size_t temp, temp1; + + if (!count) + return xs; + c &= 0xff; + c |= c << 8; + c |= c << 16; + if ((long) s & 1) + { + char *cs = s; + *cs++ = c; + s = cs; + count--; + } + if (count > 2 && (long) s & 2) + { + short *ss = s; + *ss++ = c; + s = ss; + count -= 2; + } + temp = count >> 2; + if (temp) + { + long *ls = s; + + __asm__ __volatile__("movel %1,%2\n\t" + "andw #7,%2\n\t" + "lsrl #3,%1\n\t" + "negw %2\n\t" + "jmp %%pc@(2f,%2:w:2)\n\t" + "1:\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "movel %3,%0@+\n\t" + "2:\t" + "dbra %1,1b\n\t" + "clrw %1\n\t" + "subql #1,%1\n\t" + "jpl 1b\n\t" + : "=a" (ls), "=d" (temp), "=&d" (temp1) + : "d" (c), "0" (ls), "1" (temp) + ); + s = ls; + } + if (count & 2) + { + short *ss = s; + *ss++ = c; + s = ss; + } + if (count & 1) + { + char *cs = s; + *cs = c; + } + return xs; +} |