1/* SPDX-License-Identifier: GPL-2.0 */
2/* Cloned and hacked for uClibc by Paul Mundt, December 2003 */
3/* Modified by SuperH, Inc. September 2003 */
4! Entry: arg0: destination
5!        arg1: source
6! Exit:  result: destination
7!
8! SH5 code Copyright 2002 SuperH Ltd.
9
10#if __BYTE_ORDER == __LITTLE_ENDIAN
11#define SHHI shlld
12#define SHLO shlrd
13#else
14#define SHHI shlrd
15#define SHLO shlld
16#endif
17
18	.section .text..SHmedia32,"ax"
19	.globl	strcpy
20	.type	strcpy, @function
21	.align 5
22
23strcpy:
24
25	pta/l shortstring,tr1
26	ldlo.q r3,0,r4
27	ptabs r18,tr4
28	shlli r3,3,r7
29	addi r2, 8, r0
30	mcmpeq.b r4,r63,r6
31	SHHI r6,r7,r6
32	bnei/u r6,0,tr1 // shortstring
33	pta/l no_lddst, tr2
34	ori r3,-8,r23
35	sub r2, r23, r0
36	sub r3, r2, r21
37	addi r21, 8, r20
38	ldx.q r0, r21, r5
39	pta/l loop, tr0
40	ori r2,-8,r22
41	mcmpeq.b r5, r63, r6
42	bgt/u r22, r23, tr2 // no_lddst
43
44	// r22 < r23 :  Need to do a load from the destination.
45	// r22 == r23 : Doesn't actually need to load from destination,
46	//              but still can be handled here.
47	ldlo.q r2, 0, r9
48	movi -1, r8
49	SHLO r8, r7, r8
50	mcmv r4, r8, r9
51	stlo.q r2, 0, r9
52	beqi/l r6, 0, tr0 // loop
53
54	add r5, r63, r4
55	addi r0, 8, r0
56	blink tr1, r63 // shortstring
57no_lddst:
58	// r22 > r23: note that for r22 == r23 the sthi.q would clobber
59	//            bytes before the destination region.
60	stlo.q r2, 0, r4
61	SHHI r4, r7, r4
62	sthi.q r0, -1, r4
63	beqi/l r6, 0, tr0 // loop
64
65	add r5, r63, r4
66	addi r0, 8, r0
67shortstring:
68#if __BYTE_ORDER != __LITTLE_ENDIAN
69	pta/l shortstring2,tr1
70	byterev r4,r4
71#endif
72shortstring2:
73	st.b r0,-8,r4
74	andi r4,0xff,r5
75	shlri r4,8,r4
76	addi r0,1,r0
77	bnei/l r5,0,tr1
78	blink tr4,r63 // return
79
80	.balign 8
81loop:
82	stlo.q r0, 0, r5
83	ldx.q r0, r20, r4
84	addi r0, 16, r0
85	sthi.q r0, -9, r5
86	mcmpeq.b r4, r63, r6
87	bnei/u r6, 0, tr1 // shortstring
88	ldx.q r0, r21, r5
89	stlo.q r0, -8, r4
90	sthi.q r0, -1, r4
91	mcmpeq.b r5, r63, r6
92	beqi/l r6, 0, tr0 // loop
93
94	add r5, r63, r4
95	addi r0, 8, r0
96	blink tr1, r63 // shortstring
97
98	.size	strcpy,.-strcpy
99