[mirror_ubuntu-bionic-kernel.git] / arch / h8300 / lib / strncpy.S

;;; 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
Commit	Line	Data
b2441318	1	;;; SPDX-License-Identifier: GPL-2.0
a71a29de YS	2	;;; strncpy.S
	3
	4	#include <asm/linkage.h>
	5
	6	.text
	7	.global strncpy_from_user
	8
	9	;;; long strncpy_from_user(void to, void from, size_t n)
	10	strncpy_from_user:
	11	mov.l er2,er2
	12	bne 1f
	13	sub.l er0,er0
	14	rts
	15	1:
	16	mov.l er4,@-sp
	17	sub.l er3,er3
	18	2:
	19	mov.b @er1+,r4l
	20	mov.b r4l,@er0
	21	adds #1,er0
	22	beq 3f
	23	inc.l #1,er3
	24	dec.l #1,er2
	25	bne 2b
	26	3:
	27	dec.l #1,er2
	28	4:
	29	mov.b r4l,@er0
	30	adds #1,er0
	31	dec.l #1,er2
	32	bne 4b
	33	mov.l er3,er0
	34	mov.l @sp+,er4
	35	rts