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