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| /* SPDX-License-Identifier: GPL-2.0 */
| /* 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
|
|
