| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Paul Mundt | 4466b20 | 2008-12-12 16:34:44 +0900 | [diff] [blame] | 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 |