Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include "sysdep.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) ENTRY(strlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 	/* Check if the start addr is aligned.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	mov	r3, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	andi	r1, r0, 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	movi	r2, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	movi	r0, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	bnez	r1, .L_start_not_aligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	LABLE_ALIGN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) .L_start_addr_aligned:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	/* Check if all the bytes in the word are not zero.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	ldw	r1, (r3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	ldw	r1, (r3, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	ldw	r1, (r3, 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	ldw	r1, (r3, 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	ldw	r1, (r3, 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	ldw	r1, (r3, 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	ldw	r1, (r3, 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	ldw	r1, (r3, 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	tstnbz	r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	bf	.L_string_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	addi	r0, 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	addi	r3, 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	br	.L_start_addr_aligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .L_string_tail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) # ifdef __CSKYBE__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	xtrb0	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	xtrb1	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	xtrb2	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) # else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	xtrb3	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	xtrb2	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	xtrb1	r3, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	bez	r3, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) # endif	/* !__CSKYBE__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .L_return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	rts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .L_start_not_aligned:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	sub	r2, r2, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .L_start_not_aligned_loop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) 	ldb	r1, (r3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	PRE_BNEZAD (r2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 	addi	r3, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 	bez	r1, .L_return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	addi	r0, 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 	BNEZAD (r2, .L_start_not_aligned_loop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) 	br	.L_start_addr_aligned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ENDPROC(strlen)