Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
4466b20c PM |
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 | ||
23 | strcpy: | |
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 | |
57 | no_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 | |
67 | shortstring: | |
68 | #if __BYTE_ORDER != __LITTLE_ENDIAN | |
69 | pta/l shortstring2,tr1 | |
70 | byterev r4,r4 | |
71 | #endif | |
72 | shortstring2: | |
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 | |
81 | loop: | |
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 |