1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
/*
Copyright (c) 2009 Nick Clifton <nickc@redhat.com>
*/
.file "strcpy.S"
.section .text
.global _strcpy
.type _strcpy,@function
_strcpy:
;; R1: dest
;; R2: source
#ifdef __RX_DISALLOW_STRING_INSNS__
mov r1, r4 ; Leave the destination address unchanged in the result register.
1: mov.b [r2+], r5
mov.b r5, [r4+]
cmp #0, r5
bne 1b
rts
#else
mov r1, r4
mov #-1, r3 ; Strictly speaking this is incorrect, but I doubt if anyone will ever know.
smovu
mov r4, r1
rts
#endif
.size _strcpy, . - _strcpy
|
