| /* Cloned and hacked for uClibc by Paul Mundt, December 2003 */ | |
| /* Modified by SuperH, Inc. September 2003 */ | |
| ! Entry: arg0: destination | |
| ! arg1: source | |
| ! Exit: result: destination | |
| ! | |
| ! SH5 code Copyright 2002 SuperH Ltd. | |
| #if __BYTE_ORDER == __LITTLE_ENDIAN | |
| #define SHHI shlld | |
| #define SHLO shlrd | |
| #else | |
| #define SHHI shlrd | |
| #define SHLO shlld | |
| #endif | |
| .section .text..SHmedia32,"ax" | |
| .globl strcpy | |
| .type strcpy, @function | |
| .align 5 | |
| strcpy: | |
| pta/l shortstring,tr1 | |
| ldlo.q r3,0,r4 | |
| ptabs r18,tr4 | |
| shlli r3,3,r7 | |
| addi r2, 8, r0 | |
| mcmpeq.b r4,r63,r6 | |
| SHHI r6,r7,r6 | |
| bnei/u r6,0,tr1 // shortstring | |
| pta/l no_lddst, tr2 | |
| ori r3,-8,r23 | |
| sub r2, r23, r0 | |
| sub r3, r2, r21 | |
| addi r21, 8, r20 | |
| ldx.q r0, r21, r5 | |
| pta/l loop, tr0 | |
| ori r2,-8,r22 | |
| mcmpeq.b r5, r63, r6 | |
| bgt/u r22, r23, tr2 // no_lddst | |
| // r22 < r23 : Need to do a load from the destination. | |
| // r22 == r23 : Doesn't actually need to load from destination, | |
| // but still can be handled here. | |
| ldlo.q r2, 0, r9 | |
| movi -1, r8 | |
| SHLO r8, r7, r8 | |
| mcmv r4, r8, r9 | |
| stlo.q r2, 0, r9 | |
| beqi/l r6, 0, tr0 // loop | |
| add r5, r63, r4 | |
| addi r0, 8, r0 | |
| blink tr1, r63 // shortstring | |
| no_lddst: | |
| // r22 > r23: note that for r22 == r23 the sthi.q would clobber | |
| // bytes before the destination region. | |
| stlo.q r2, 0, r4 | |
| SHHI r4, r7, r4 | |
| sthi.q r0, -1, r4 | |
| beqi/l r6, 0, tr0 // loop | |
| add r5, r63, r4 | |
| addi r0, 8, r0 | |
| shortstring: | |
| #if __BYTE_ORDER != __LITTLE_ENDIAN | |
| pta/l shortstring2,tr1 | |
| byterev r4,r4 | |
| #endif | |
| shortstring2: | |
| st.b r0,-8,r4 | |
| andi r4,0xff,r5 | |
| shlri r4,8,r4 | |
| addi r0,1,r0 | |
| bnei/l r5,0,tr1 | |
| blink tr4,r63 // return | |
| .balign 8 | |
| loop: | |
| stlo.q r0, 0, r5 | |
| ldx.q r0, r20, r4 | |
| addi r0, 16, r0 | |
| sthi.q r0, -9, r5 | |
| mcmpeq.b r4, r63, r6 | |
| bnei/u r6, 0, tr1 // shortstring | |
| ldx.q r0, r21, r5 | |
| stlo.q r0, -8, r4 | |
| sthi.q r0, -1, r4 | |
| mcmpeq.b r5, r63, r6 | |
| beqi/l r6, 0, tr0 // loop | |
| add r5, r63, r4 | |
| addi r0, 8, r0 | |
| blink tr1, r63 // shortstring | |
| .size strcpy,.-strcpy |