/* 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. #include <features.h> #include <endian.h> #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 libc_hidden_def(strcpy)