diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/h8300/lib/memset.S | |
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/h8300/lib/memset.S')
| -rw-r--r-- | arch/h8300/lib/memset.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/h8300/lib/memset.S b/arch/h8300/lib/memset.S new file mode 100644 index 00000000000..59abdf9485a --- /dev/null +++ b/arch/h8300/lib/memset.S @@ -0,0 +1,61 @@ +/* memset.S */ + +#include <asm/linkage.h> + +#if defined(__H8300H__) + .h8300h +#endif +#if defined(__H8300S__) + .h8300s +#endif + .text + +.global SYMBOL_NAME(memset) + +;;void *memset(*ptr, int c, size_t count) +;; ptr = er0 +;; c = er1(r1l) +;; count = er2 +SYMBOL_NAME_LABEL(memset) + btst #0,r0l + beq 2f + + ;; odd address +1: + mov.b r1l,@er0 + adds #1,er0 + dec.l #1,er2 + beq 6f + + ;; even address +2: + mov.l er2,er3 + cmp.l #4,er2 + blo 4f + ;; count>=4 -> count/4 +#if defined(__H8300H__) + shlr.l er2 + shlr.l er2 +#endif +#if defined(__H8300S__) + shlr.l #2,er2 +#endif + ;; byte -> long + mov.b r1l,r1h + mov.w r1,e1 +3: + mov.l er1,@er0 + adds #4,er0 + dec.l #1,er2 + bne 3b +4: + ;; count % 4 + and.b #3,r3l + beq 6f +5: + mov.b r1l,@er0 + adds #1,er0 + dec.b r3l + bne 5b +6: + rts |