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| author | Scott Wood <scottwood@freescale.com> | 2014-04-07 23:49:35 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-04-07 23:49:35 (GMT) |
| commit | 62b8c978ee6b8d135d9e7953221de58000dba986 (patch) | |
| tree | 683b04b2e627f6710c22c151b23c8cc9a165315e /arch/h8300/lib/memset.S | |
| parent | 78fd82238d0e5716578c326404184a27ba67fd6e (diff) | |
| download | linux-fsl-qoriq-62b8c978ee6b8d135d9e7953221de58000dba986.tar.xz | |
Rewind v3.13-rc3+ (78fd82238d0e5716) to v3.12
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 0000000..4549a64 --- /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 _memset + +;;void *memset(*ptr, int c, size_t count) +;; ptr = er0 +;; c = er1(r1l) +;; count = er2 +_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 |