| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Cloned and hacked for uClibc by Paul Mundt, December 2003 */ |
| 2 | /* Modified by SuperH, Inc. September 2003 */ |
| 3 | ! Entry: arg0: destination |
| 4 | ! arg1: source |
| 5 | ! Exit: result: destination |
| 6 | ! |
| 7 | ! SH5 code Copyright 2002 SuperH Ltd. |
| 8 | |
| 9 | #include <features.h> |
| 10 | #include <endian.h> |
| 11 | |
| 12 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 13 | #define SHHI shlld |
| 14 | #define SHLO shlrd |
| 15 | #else |
| 16 | #define SHHI shlrd |
| 17 | #define SHLO shlld |
| 18 | #endif |
| 19 | |
| 20 | .section .text..SHmedia32,"ax" |
| 21 | .globl strcpy |
| 22 | .type strcpy, @function |
| 23 | .align 5 |
| 24 | |
| 25 | strcpy: |
| 26 | |
| 27 | pta/l shortstring,tr1 |
| 28 | ldlo.q r3,0,r4 |
| 29 | ptabs r18,tr4 |
| 30 | shlli r3,3,r7 |
| 31 | addi r2, 8, r0 |
| 32 | mcmpeq.b r4,r63,r6 |
| 33 | SHHI r6,r7,r6 |
| 34 | bnei/u r6,0,tr1 /* shortstring */ |
| 35 | pta/l no_lddst, tr2 |
| 36 | ori r3,-8,r23 |
| 37 | sub r2, r23, r0 |
| 38 | sub r3, r2, r21 |
| 39 | addi r21, 8, r20 |
| 40 | ldx.q r0, r21, r5 |
| 41 | pta/l loop, tr0 |
| 42 | ori r2,-8,r22 |
| 43 | mcmpeq.b r5, r63, r6 |
| 44 | bgt/u r22, r23, tr2 /* no_lddst */ |
| 45 | |
| 46 | /* r22 < r23 : Need to do a load from the destination. */ |
| 47 | /* r22 == r23 : Doesn't actually need to load from destination, */ |
| 48 | /* but still can be handled here. */ |
| 49 | ldlo.q r2, 0, r9 |
| 50 | movi -1, r8 |
| 51 | SHLO r8, r7, r8 |
| 52 | mcmv r4, r8, r9 |
| 53 | stlo.q r2, 0, r9 |
| 54 | beqi/l r6, 0, tr0 /* loop */ |
| 55 | |
| 56 | add r5, r63, r4 |
| 57 | addi r0, 8, r0 |
| 58 | blink tr1, r63 /* shortstring */ |
| 59 | no_lddst: |
| 60 | /* r22 > r23: note that for r22 == r23 the sthi.q would clobber */ |
| 61 | /* bytes before the destination region. */ |
| 62 | stlo.q r2, 0, r4 |
| 63 | SHHI r4, r7, r4 |
| 64 | sthi.q r0, -1, r4 |
| 65 | beqi/l r6, 0, tr0 /* loop */ |
| 66 | |
| 67 | add r5, r63, r4 |
| 68 | addi r0, 8, r0 |
| 69 | shortstring: |
| 70 | #if __BYTE_ORDER != __LITTLE_ENDIAN |
| 71 | pta/l shortstring2,tr1 |
| 72 | byterev r4,r4 |
| 73 | #endif |
| 74 | shortstring2: |
| 75 | st.b r0,-8,r4 |
| 76 | andi r4,0xff,r5 |
| 77 | shlri r4,8,r4 |
| 78 | addi r0,1,r0 |
| 79 | bnei/l r5,0,tr1 |
| 80 | blink tr4,r63 /* return */ |
| 81 | |
| 82 | .balign 8 |
| 83 | loop: |
| 84 | stlo.q r0, 0, r5 |
| 85 | ldx.q r0, r20, r4 |
| 86 | addi r0, 16, r0 |
| 87 | sthi.q r0, -9, r5 |
| 88 | mcmpeq.b r4, r63, r6 |
| 89 | bnei/u r6, 0, tr1 /* shortstring */ |
| 90 | ldx.q r0, r21, r5 |
| 91 | stlo.q r0, -8, r4 |
| 92 | sthi.q r0, -1, r4 |
| 93 | mcmpeq.b r5, r63, r6 |
| 94 | beqi/l r6, 0, tr0 /* loop */ |
| 95 | |
| 96 | add r5, r63, r4 |
| 97 | addi r0, 8, r0 |
| 98 | blink tr1, r63 /* shortstring */ |
| 99 | |
| 100 | .size strcpy,.-strcpy |
| 101 | |
| 102 | libc_hidden_def(strcpy) |