diff options
Diffstat (limited to 'arch/h8300/lib/strncpy.S')
| -rw-r--r-- | arch/h8300/lib/strncpy.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/h8300/lib/strncpy.S b/arch/h8300/lib/strncpy.S new file mode 100644 index 000000000..8b65d7c47 --- /dev/null +++ b/arch/h8300/lib/strncpy.S @@ -0,0 +1,35 @@ +;;; SPDX-License-Identifier: GPL-2.0 +;;; strncpy.S + +#include <asm/linkage.h> + + .text +.global strncpy_from_user + +;;; long strncpy_from_user(void *to, void *from, size_t n) +strncpy_from_user: + mov.l er2,er2 + bne 1f + sub.l er0,er0 + rts +1: + mov.l er4,@-sp + sub.l er3,er3 +2: + mov.b @er1+,r4l + mov.b r4l,@er0 + adds #1,er0 + beq 3f + inc.l #1,er3 + dec.l #1,er2 + bne 2b +3: + dec.l #1,er2 +4: + mov.b r4l,@er0 + adds #1,er0 + dec.l #1,er2 + bne 4b + mov.l er3,er0 + mov.l @sp+,er4 + rts |