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! Copyright (C) 2013 Imagination Technologies Ltd.
! Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
.text
.global _strcpy
.type _strcpy,function
! D1Ar1 dst
! D0Ar2 src
_strcpy:
MOV A1.2, D1Ar1
! test 4 byte alignment of src
ANDS D0Ar4, D0Ar2, #3
BNZ $Lbyteloop
! test 4 byte alignment of dest
ANDS D1Ar5, D1Ar1, #3
BNZ $Lbyteloop
! load mask values for aligned loops
MOVT D1Ar3, #HI(0xfefefeff)
ADD D1Ar3, D1Ar3, #LO(0xfefefeff)
MOVT D0FrT, #HI(0x80808080)
ADD D0FrT, D0FrT, #LO(0x80808080)
! test 8 byte alignment of src
ANDS D0Ar4, D0Ar2, #7
BNZ $Lwordloop
! test 8 byte alignment of dest
ANDS D1Ar5, D1Ar1, #7
BNZ $Lwordloop
$L8byteloop:
GETL D1Ar5, D0Ar6, [D0Ar2++]
MOV D1Re0, D1Ar5
MOV D0Re0, D1Ar5
ADD D1Re0, D1Re0, D1Ar3
XOR D0Re0, D0Re0, #-1
AND D1Re0, D1Re0, D0Re0
ANDS D1Re0, D1Re0, D0FrT
BNZ $Lnullfound ! NULL in first word
MOV D1Re0, D0Ar6
MOV D0Re0, D0Ar6
ADD D1Re0, D1Re0, D1Ar3
XOR D0Re0, D0Re0, #-1
AND D1Re0, D1Re0, D0Re0
ANDS D1Re0, D1Re0, D0FrT
BNZ $Lnullfound2 ! NULL in the second word
SETL [A1.2++], D1Ar5, D0Ar6
B $L8byteloop
$Lwordloop:
GETD D0Ar6, [D0Ar2++]
MOV D1Re0, D0Ar6
MOV D0Re0, D0Ar6
ADD D1Re0, D1Re0, D1Ar3
XOR D0Re0, D0Re0, #-1
AND D1Re0, D1Re0, D0Re0
ANDS D1Re0, D1Re0, D0FrT
MOV D1Ar5, D0Ar6
BNZ $Lnullfound
SETD [A1.2++], D0Ar6
B $Lwordloop
$Lnullfound2:
SETD [A1.2++], D1Ar5
MOV D1Ar5, D0Ar6
$Lnullfound:
SETB [A1.2++], D1Ar5
ANDS D0Ar6, D1Ar5, #0xff
LSR D1Ar5, D1Ar5, #8
BNZ $Lnullfound
B $Lend
$Lbyteloop:
GETB D0Ar6, [D0Ar2++]
SETB [A1.2++], D0Ar6
CMP D0Ar6, #0
BNZ $Lbyteloop
$Lend:
MOV D0Re0, D1Ar1
MOV PC, D1RtP
.size _strcpy,.-_strcpy
libc_hidden_def(strcpy)
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