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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/v850/lib/memset.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2v2.6.12-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/v850/lib/memset.c')
-rw-r--r-- | arch/v850/lib/memset.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/v850/lib/memset.c b/arch/v850/lib/memset.c new file mode 100644 index 000000000000..d1b2ad821b15 --- /dev/null +++ b/arch/v850/lib/memset.c @@ -0,0 +1,68 @@ +/* + * arch/v850/lib/memset.c -- Memory initialization + * + * Copyright (C) 2001,02,04 NEC Corporation + * Copyright (C) 2001,02,04 Miles Bader <miles@gnu.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * Written by Miles Bader <miles@gnu.org> + */ + +#include <linux/types.h> + +void *memset (void *dst, int val, __kernel_size_t count) +{ + if (count) { + register unsigned loop; + register void *ptr asm ("ep") = dst; + + /* replicate VAL into a long. */ + val &= 0xff; + val |= val << 8; + val |= val << 16; + + /* copy initial unaligned bytes. */ + if ((long)ptr & 1) { + *(char *)ptr = val; + ptr = (void *)((char *)ptr + 1); + count--; + } + if (count > 2 && ((long)ptr & 2)) { + *(short *)ptr = val; + ptr = (void *)((short *)ptr + 1); + count -= 2; + } + + /* 32-byte copying loop. */ + for (loop = count / 32; loop; loop--) { + asm ("sst.w %0, 0[ep]; sst.w %0, 4[ep];" + "sst.w %0, 8[ep]; sst.w %0, 12[ep];" + "sst.w %0, 16[ep]; sst.w %0, 20[ep];" + "sst.w %0, 24[ep]; sst.w %0, 28[ep]" + :: "r" (val) : "memory"); + ptr += 32; + } + count %= 32; + + /* long copying loop. */ + for (loop = count / 4; loop; loop--) { + *(long *)ptr = val; + ptr = (void *)((long *)ptr + 1); + } + count %= 4; + + /* finish up with any trailing bytes. */ + if (count & 2) { + *(short *)ptr = val; + ptr = (void *)((short *)ptr + 1); + } + if (count & 1) { + *(char *)ptr = val; + } + } + + return dst; +} |