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/*
* ARM memcpy asm replacement.
*
* Copyright (C) 2009 Bluush Dev Team.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#if USE_ARMASM && !WORDS_BIGENDIAN
#define _LABEL(f) f :
.global direct_armasm_memcpy
.code 32
_LABEL(direct_armasm_memcpy)
cmp r1, r0
bcc Lmemcpy_backwards
moveq r0, #0
moveq pc, lr
stmdb sp!, {r0, lr}
subs r2, r2, #4
blt Lmemcpy_fl4
ands r12, r0, #3
bne Lmemcpy_fdestul
ands r12, r1, #3
bne Lmemcpy_fsrcul
_LABEL(Lmemcpy_ft8)
subs r2, r2, #8
blt Lmemcpy_fl12
subs r2, r2, #0x14
blt Lmemcpy_fl32
stmdb sp!, {r4}
_LABEL(Lmemcpy_floop32)
ldmia r1!, {r3, r4, r12, lr}
stmia r0!, {r3, r4, r12, lr}
ldmia r1!, {r3, r4, r12, lr}
stmia r0!, {r3, r4, r12, lr}
subs r2, r2, #0x20
bge Lmemcpy_floop32
cmn r2, #0x10
ldmgeia r1!, {r3, r4, r12, lr}
stmgeia r0!, {r3, r4, r12, lr}
subge r2, r2, #0x10
ldmia sp!, {r4}
_LABEL(Lmemcpy_fl32)
adds r2, r2, #0x14
_LABEL(Lmemcpy_floop12)
ldmgeia r1!, {r3, r12, lr}
stmgeia r0!, {r3, r12, lr}
subges r2, r2, #0x0c
bge Lmemcpy_floop12
_LABEL(Lmemcpy_fl12)
adds r2, r2, #8
blt Lmemcpy_fl4
subs r2, r2, #4
ldrlt r3, [r1], #4
strlt r3, [r0], #4
ldmgeia r1!, {r3, r12}
stmgeia r0!, {r3, r12}
subge r2, r2, #4
_LABEL(Lmemcpy_fl4)
adds r2, r2, #4
ldmeqia sp!, {r0, pc}
cmp r2, #2
ldrb r3, [r1], #1
strb r3, [r0], #1
ldrgeb r3, [r1], #1
strgeb r3, [r0], #1
ldrgtb r3, [r1], #1
strgtb r3, [r0], #1
ldmia sp!, {r0, pc}
_LABEL(Lmemcpy_fdestul)
rsb r12, r12, #4
cmp r12, #2
ldrb r3, [r1], #1
strb r3, [r0], #1
ldrgeb r3, [r1], #1
strgeb r3, [r0], #1
ldrgtb r3, [r1], #1
strgtb r3, [r0], #1
subs r2, r2, r12
blt Lmemcpy_fl4
ands r12, r1, #3
beq Lmemcpy_ft8
_LABEL(Lmemcpy_fsrcul)
bic r1, r1, #3
ldr lr, [r1], #4
cmp r12, #2
bgt Lmemcpy_fsrcul3
beq Lmemcpy_fsrcul2
cmp r2, #0x0c
blt Lmemcpy_fsrcul1loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
_LABEL(Lmemcpy_fsrcul1loop16)
mov r3, lr, lsr #8
ldmia r1!, {r4, r5, r12, lr}
orr r3, r3, r4, lsl #24
mov r4, r4, lsr #8
orr r4, r4, r5, lsl #24
mov r5, r5, lsr #8
orr r5, r5, r12, lsl #24
mov r12, r12, lsr #8
orr r12, r12, lr, lsl #24
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge Lmemcpy_fsrcul1loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt Lmemcpy_fsrcul1l4
_LABEL(Lmemcpy_fsrcul1loop4)
mov r12, lr, lsr #8
ldr lr, [r1], #4
orr r12, r12, lr, lsl #24
str r12, [r0], #4
subs r2, r2, #4
bge Lmemcpy_fsrcul1loop4
_LABEL(Lmemcpy_fsrcul1l4)
sub r1, r1, #3
b Lmemcpy_fl4
_LABEL(Lmemcpy_fsrcul2)
cmp r2, #0x0c
blt Lmemcpy_fsrcul2loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
_LABEL(Lmemcpy_fsrcul2loop16)
mov r3, lr, lsr #16
ldmia r1!, {r4, r5, r12, lr}
orr r3, r3, r4, lsl #16
mov r4, r4, lsr #16
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r12, lsl #16
mov r12, r12, lsr #16
orr r12, r12, lr, lsl #16
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge Lmemcpy_fsrcul2loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt Lmemcpy_fsrcul2l4
_LABEL(Lmemcpy_fsrcul2loop4)
mov r12, lr, lsr #16
ldr lr, [r1], #4
orr r12, r12, lr, lsl #16
str r12, [r0], #4
subs r2, r2, #4
bge Lmemcpy_fsrcul2loop4
_LABEL(Lmemcpy_fsrcul2l4)
sub r1, r1, #2
b Lmemcpy_fl4
_LABEL(Lmemcpy_fsrcul3)
cmp r2, #0x0c
blt Lmemcpy_fsrcul3loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
_LABEL(Lmemcpy_fsrcul3loop16)
mov r3, lr, lsr #24
ldmia r1!, {r4, r5, r12, lr}
orr r3, r3, r4, lsl #8
mov r4, r4, lsr #24
orr r4, r4, r5, lsl #8
mov r5, r5, lsr #24
orr r5, r5, r12, lsl #8
mov r12, r12, lsr #24
orr r12, r12, lr, lsl #8
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge Lmemcpy_fsrcul3loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt Lmemcpy_fsrcul3l4
_LABEL(Lmemcpy_fsrcul3loop4)
mov r12, lr, lsr #24
ldr lr, [r1], #4
orr r12, r12, lr, lsl #8
str r12, [r0], #4
subs r2, r2, #4
bge Lmemcpy_fsrcul3loop4
_LABEL(Lmemcpy_fsrcul3l4)
sub r1, r1, #1
b Lmemcpy_fl4
_LABEL(Lmemcpy_backwards)
add r1, r1, r2
add r0, r0, r2
subs r2, r2, #4
blt Lmemcpy_bl4
ands r12, r0, #3
bne Lmemcpy_bdestul
ands r12, r1, #3
bne Lmemcpy_bsrcul
_LABEL(Lmemcpy_bt8)
subs r2, r2, #8
blt Lmemcpy_bl12
stmdb sp!, {r4, lr}
subs r2, r2, #0x14
blt Lmemcpy_bl32
_LABEL(Lmemcpy_bloop32)
ldmdb r1!, {r3, r4, r12, lr}
stmdb r0!, {r3, r4, r12, lr}
ldmdb r1!, {r3, r4, r12, lr}
stmdb r0!, {r3, r4, r12, lr}
subs r2, r2, #0x20
bge Lmemcpy_bloop32
_LABEL(Lmemcpy_bl32)
cmn r2, #0x10
ldmgedb r1!, {r3, r4, r12, lr}
stmgedb r0!, {r3, r4, r12, lr}
subge r2, r2, #0x10
adds r2, r2, #0x14
ldmgedb r1!, {r3, r12, lr}
stmgedb r0!, {r3, r12, lr}
subge r2, r2, #0x0c
ldmia sp!, {r4, lr}
_LABEL(Lmemcpy_bl12)
adds r2, r2, #8
blt Lmemcpy_bl4
subs r2, r2, #4
ldrlt r3, [r1, #-4]!
strlt r3, [r0, #-4]!
ldmgedb r1!, {r3, r12}
stmgedb r0!, {r3, r12}
subge r2, r2, #4
_LABEL(Lmemcpy_bl4)
adds r2, r2, #4
moveq pc, lr
cmp r2, #2
ldrb r3, [r1, #-1]!
strb r3, [r0, #-1]!
ldrgeb r3, [r1, #-1]!
strgeb r3, [r0, #-1]!
ldrgtb r3, [r1, #-1]!
strgtb r3, [r0, #-1]!
mov pc, lr
_LABEL(Lmemcpy_bdestul)
cmp r12, #2
ldrb r3, [r1, #-1]!
strb r3, [r0, #-1]!
ldrgeb r3, [r1, #-1]!
strgeb r3, [r0, #-1]!
ldrgtb r3, [r1, #-1]!
strgtb r3, [r0, #-1]!
subs r2, r2, r12
blt Lmemcpy_bl4
ands r12, r1, #3
beq Lmemcpy_bt8
_LABEL(Lmemcpy_bsrcul)
bic r1, r1, #3
ldr r3, [r1, #0]
cmp r12, #2
blt Lmemcpy_bsrcul1
beq Lmemcpy_bsrcul2
cmp r2, #0x0c
blt Lmemcpy_bsrcul3loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
_LABEL(Lmemcpy_bsrcul3loop16)
mov lr, r3, lsl #8
ldmdb r1!, {r3-r5, r12}
orr lr, lr, r12, lsr #24
mov r12, r12, lsl #8
orr r12, r12, r5, lsr #24
mov r5, r5, lsl #8
orr r5, r5, r4, lsr #24
mov r4, r4, lsl #8
orr r4, r4, r3, lsr #24
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge Lmemcpy_bsrcul3loop16
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt Lmemcpy_bsrcul3l4
_LABEL(Lmemcpy_bsrcul3loop4)
mov r12, r3, lsl #8
ldr r3, [r1, #-4]!
orr r12, r12, r3, lsr #24
str r12, [r0, #-4]!
subs r2, r2, #4
bge Lmemcpy_bsrcul3loop4
_LABEL(Lmemcpy_bsrcul3l4)
add r1, r1, #3
b Lmemcpy_bl4
_LABEL(Lmemcpy_bsrcul2)
cmp r2, #0x0c
blt Lmemcpy_bsrcul2loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
_LABEL(Lmemcpy_bsrcul2loop16)
mov lr, r3, lsl #16
ldmdb r1!, {r3-r5, r12}
orr lr, lr, r12, lsr #16
mov r12, r12, lsl #16
orr r12, r12, r5, lsr #16
mov r5, r5, lsl #16
orr r5, r5, r4, lsr #16
mov r4, r4, lsl #16
orr r4, r4, r3, lsr #16
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge Lmemcpy_bsrcul2loop16
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt Lmemcpy_bsrcul2l4
_LABEL(Lmemcpy_bsrcul2loop4)
mov r12, r3, lsl #16
ldr r3, [r1, #-4]!
orr r12, r12, r3, lsr #16
str r12, [r0, #-4]!
subs r2, r2, #4
bge Lmemcpy_bsrcul2loop4
_LABEL(Lmemcpy_bsrcul2l4)
add r1, r1, #2
b Lmemcpy_bl4
_LABEL(Lmemcpy_bsrcul1)
cmp r2, #0x0c
blt Lmemcpy_bsrcul1loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
_LABEL(Lmemcpy_bsrcul1loop32)
mov lr, r3, lsl #24
ldmdb r1!, {r3-r5, r12}
orr lr, lr, r12, lsr #8
mov r12, r12, lsl #24
orr r12, r12, r5, lsr #8
mov r5, r5, lsl #24
orr r5, r5, r4, lsr #8
mov r4, r4, lsl #24
orr r4, r4, r3, lsr #8
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge Lmemcpy_bsrcul1loop32
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt Lmemcpy_bsrcul1l4
_LABEL(Lmemcpy_bsrcul1loop4)
mov r12, r3, lsl #24
ldr r3, [r1, #-4]!
orr r12, r12, r3, lsr #8
str r12, [r0, #-4]!
subs r2, r2, #4
bge Lmemcpy_bsrcul1loop4
_LABEL(Lmemcpy_bsrcul1l4)
add r1, r1, #1
b Lmemcpy_bl4
.ltorg
#endif /* USE_ARMASM && !WORDS_BIGENDIAN */
|
