ARM optimised memcpy/memmove from glibc. This should give increased performance on all ARM targets, especially iPod 5G
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12000 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
parent
ec81431466
commit
1010b76c72
|
@ -248,8 +248,8 @@ target/coldfire/i2c-coldfire.c
|
|||
|
||||
#elif defined(CPU_PP) || defined(CPU_ARM)
|
||||
/* CPU_PP => CPU_ARM, CPU_ARM !=> CPU_PP */
|
||||
common/memcpy.c
|
||||
common/memmove.c
|
||||
target/arm/memcpy-arm.S
|
||||
target/arm/memmove-arm.S
|
||||
common/strlen.c
|
||||
#ifndef SIMULATOR
|
||||
target/arm/memset-arm.S
|
||||
|
|
174
firmware/target/arm/memcpy-arm.S
Normal file
174
firmware/target/arm/memcpy-arm.S
Normal file
|
@ -0,0 +1,174 @@
|
|||
/***************************************************************************
|
||||
* __________ __ ___.
|
||||
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||
* \/ \/ \/ \/ \/
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2006 Free Software Foundation, Inc.
|
||||
* This file was originally part of the GNU C Library
|
||||
* Contributed to glibc by MontaVista Software, Inc. (written by Nicolas Pitre)
|
||||
* Adapted for Rockbox by Daniel Ankers
|
||||
*
|
||||
* All files in this archive are subject to the GNU General Public License.
|
||||
* See the file COPYING in the source tree root for full license agreement.
|
||||
*
|
||||
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
/*
|
||||
* Endian independent macros for shifting bytes within registers.
|
||||
*/
|
||||
#ifndef __ARMEB__
|
||||
#define pull lsr
|
||||
#define push lsl
|
||||
#else
|
||||
#define pull lsl
|
||||
#define push lsr
|
||||
#endif
|
||||
|
||||
/* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
|
||||
|
||||
.section .icode,"ax",%progbits
|
||||
|
||||
.align 2
|
||||
.global memcpy
|
||||
.type memcpy,%function
|
||||
|
||||
memcpy:
|
||||
stmfd sp!, {r0, r4, lr}
|
||||
|
||||
subs r2, r2, #4
|
||||
blt 8f
|
||||
ands ip, r0, #3
|
||||
bne 9f
|
||||
ands ip, r1, #3
|
||||
bne 10f
|
||||
|
||||
1: subs r2, r2, #(28)
|
||||
stmfd sp!, {r5 - r8}
|
||||
blt 5f
|
||||
|
||||
2:
|
||||
3:
|
||||
4: ldmia r1!, {r3, r4, r5, r6, r7, r8, ip, lr}
|
||||
subs r2, r2, #32
|
||||
stmia r0!, {r3, r4, r5, r6, r7, r8, ip, lr}
|
||||
bge 3b
|
||||
|
||||
5: ands ip, r2, #28
|
||||
rsb ip, ip, #32
|
||||
addne pc, pc, ip @ C is always clear here
|
||||
b 7f
|
||||
6: nop
|
||||
ldr r3, [r1], #4
|
||||
ldr r4, [r1], #4
|
||||
ldr r5, [r1], #4
|
||||
ldr r6, [r1], #4
|
||||
ldr r7, [r1], #4
|
||||
ldr r8, [r1], #4
|
||||
ldr lr, [r1], #4
|
||||
|
||||
add pc, pc, ip
|
||||
nop
|
||||
nop
|
||||
str r3, [r0], #4
|
||||
str r4, [r0], #4
|
||||
str r5, [r0], #4
|
||||
str r6, [r0], #4
|
||||
str r7, [r0], #4
|
||||
str r8, [r0], #4
|
||||
str lr, [r0], #4
|
||||
|
||||
7: ldmfd sp!, {r5 - r8}
|
||||
|
||||
8: movs r2, r2, lsl #31
|
||||
ldrneb r3, [r1], #1
|
||||
ldrcsb r4, [r1], #1
|
||||
ldrcsb ip, [r1]
|
||||
strneb r3, [r0], #1
|
||||
strcsb r4, [r0], #1
|
||||
strcsb ip, [r0]
|
||||
|
||||
ldmfd sp!, {r0, r4, pc}
|
||||
|
||||
9: rsb ip, ip, #4
|
||||
cmp ip, #2
|
||||
ldrgtb r3, [r1], #1
|
||||
ldrgeb r4, [r1], #1
|
||||
ldrb lr, [r1], #1
|
||||
strgtb r3, [r0], #1
|
||||
strgeb r4, [r0], #1
|
||||
subs r2, r2, ip
|
||||
strb lr, [r0], #1
|
||||
blt 8b
|
||||
ands ip, r1, #3
|
||||
beq 1b
|
||||
|
||||
10: bic r1, r1, #3
|
||||
cmp ip, #2
|
||||
ldr lr, [r1], #4
|
||||
beq 17f
|
||||
bgt 18f
|
||||
|
||||
|
||||
.macro forward_copy_shift pull push
|
||||
|
||||
subs r2, r2, #28
|
||||
blt 14f
|
||||
|
||||
11: stmfd sp!, {r5 - r9}
|
||||
|
||||
12:
|
||||
13: ldmia r1!, {r4, r5, r6, r7}
|
||||
mov r3, lr, pull #\pull
|
||||
subs r2, r2, #32
|
||||
ldmia r1!, {r8, r9, ip, lr}
|
||||
orr r3, r3, r4, push #\push
|
||||
mov r4, r4, pull #\pull
|
||||
orr r4, r4, r5, push #\push
|
||||
mov r5, r5, pull #\pull
|
||||
orr r5, r5, r6, push #\push
|
||||
mov r6, r6, pull #\pull
|
||||
orr r6, r6, r7, push #\push
|
||||
mov r7, r7, pull #\pull
|
||||
orr r7, r7, r8, push #\push
|
||||
mov r8, r8, pull #\pull
|
||||
orr r8, r8, r9, push #\push
|
||||
mov r9, r9, pull #\pull
|
||||
orr r9, r9, ip, push #\push
|
||||
mov ip, ip, pull #\pull
|
||||
orr ip, ip, lr, push #\push
|
||||
stmia r0!, {r3, r4, r5, r6, r7, r8, r9, ip}
|
||||
bge 12b
|
||||
|
||||
ldmfd sp!, {r5 - r9}
|
||||
|
||||
14: ands ip, r2, #28
|
||||
beq 16f
|
||||
|
||||
15: mov r3, lr, pull #\pull
|
||||
ldr lr, [r1], #4
|
||||
subs ip, ip, #4
|
||||
orr r3, r3, lr, push #\push
|
||||
str r3, [r0], #4
|
||||
bgt 15b
|
||||
|
||||
16: sub r1, r1, #(\push / 8)
|
||||
b 8b
|
||||
|
||||
.endm
|
||||
|
||||
|
||||
forward_copy_shift pull=8 push=24
|
||||
|
||||
17: forward_copy_shift pull=16 push=16
|
||||
|
||||
18: forward_copy_shift pull=24 push=8
|
||||
|
188
firmware/target/arm/memmove-arm.S
Normal file
188
firmware/target/arm/memmove-arm.S
Normal file
|
@ -0,0 +1,188 @@
|
|||
/***************************************************************************
|
||||
* __________ __ ___.
|
||||
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||||
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||||
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||||
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||||
* \/ \/ \/ \/ \/
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2006 Free Software Foundation, Inc.
|
||||
* This file was originally part of the GNU C Library
|
||||
* Contributed to glibc by MontaVista Software, Inc. (written by Nicolas Pitre)
|
||||
* Adapted for Rockbox by Daniel Ankers
|
||||
*
|
||||
* All files in this archive are subject to the GNU General Public License.
|
||||
* See the file COPYING in the source tree root for full license agreement.
|
||||
*
|
||||
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||||
* KIND, either express or implied.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#include "config.h"
|
||||
|
||||
/*
|
||||
* Endian independent macros for shifting bytes within registers.
|
||||
*/
|
||||
#ifndef __ARMEB__
|
||||
#define pull lsr
|
||||
#define push lsl
|
||||
#else
|
||||
#define pull lsl
|
||||
#define push lsr
|
||||
#endif
|
||||
|
||||
.text
|
||||
|
||||
/*
|
||||
* Prototype: void *memmove(void *dest, const void *src, size_t n);
|
||||
*
|
||||
* Note:
|
||||
*
|
||||
* If the memory regions don't overlap, we simply branch to memcpy which is
|
||||
* normally a bit faster. Otherwise the copy is done going downwards.
|
||||
*/
|
||||
|
||||
.section .icode,"ax",%progbits
|
||||
|
||||
.align 2
|
||||
.global memmove
|
||||
.type memmove,%function
|
||||
|
||||
memmove:
|
||||
|
||||
subs ip, r0, r1
|
||||
cmphi r2, ip
|
||||
bls memcpy
|
||||
|
||||
stmfd sp!, {r0, r4, lr}
|
||||
add r1, r1, r2
|
||||
add r0, r0, r2
|
||||
subs r2, r2, #4
|
||||
blt 8f
|
||||
ands ip, r0, #3
|
||||
bne 9f
|
||||
ands ip, r1, #3
|
||||
bne 10f
|
||||
|
||||
1: subs r2, r2, #(28)
|
||||
stmfd sp!, {r5 - r8}
|
||||
blt 5f
|
||||
|
||||
2:
|
||||
3:
|
||||
4: ldmdb r1!, {r3, r4, r5, r6, r7, r8, ip, lr}
|
||||
subs r2, r2, #32
|
||||
stmdb r0!, {r3, r4, r5, r6, r7, r8, ip, lr}
|
||||
bge 3b
|
||||
|
||||
5: ands ip, r2, #28
|
||||
rsb ip, ip, #32
|
||||
addne pc, pc, ip @ C is always clear here
|
||||
b 7f
|
||||
6: nop
|
||||
ldr r3, [r1, #-4]!
|
||||
ldr r4, [r1, #-4]!
|
||||
ldr r5, [r1, #-4]!
|
||||
ldr r6, [r1, #-4]!
|
||||
ldr r7, [r1, #-4]!
|
||||
ldr r8, [r1, #-4]!
|
||||
ldr lr, [r1, #-4]!
|
||||
|
||||
add pc, pc, ip
|
||||
nop
|
||||
nop
|
||||
str r3, [r0, #-4]!
|
||||
str r4, [r0, #-4]!
|
||||
str r5, [r0, #-4]!
|
||||
str r6, [r0, #-4]!
|
||||
str r7, [r0, #-4]!
|
||||
str r8, [r0, #-4]!
|
||||
str lr, [r0, #-4]!
|
||||
|
||||
7: ldmfd sp!, {r5 - r8}
|
||||
|
||||
8: movs r2, r2, lsl #31
|
||||
ldrneb r3, [r1, #-1]!
|
||||
ldrcsb r4, [r1, #-1]!
|
||||
ldrcsb ip, [r1, #-1]
|
||||
strneb r3, [r0, #-1]!
|
||||
strcsb r4, [r0, #-1]!
|
||||
strcsb ip, [r0, #-1]
|
||||
ldmfd sp!, {r0, r4, pc}
|
||||
|
||||
9: cmp ip, #2
|
||||
ldrgtb r3, [r1, #-1]!
|
||||
ldrgeb r4, [r1, #-1]!
|
||||
ldrb lr, [r1, #-1]!
|
||||
strgtb r3, [r0, #-1]!
|
||||
strgeb r4, [r0, #-1]!
|
||||
subs r2, r2, ip
|
||||
strb lr, [r0, #-1]!
|
||||
blt 8b
|
||||
ands ip, r1, #3
|
||||
beq 1b
|
||||
|
||||
10: bic r1, r1, #3
|
||||
cmp ip, #2
|
||||
ldr r3, [r1, #0]
|
||||
beq 17f
|
||||
blt 18f
|
||||
|
||||
|
||||
.macro backward_copy_shift push pull
|
||||
|
||||
subs r2, r2, #28
|
||||
blt 14f
|
||||
|
||||
11: stmfd sp!, {r5 - r9}
|
||||
|
||||
12:
|
||||
13: ldmdb r1!, {r7, r8, r9, ip}
|
||||
mov lr, r3, push #\push
|
||||
subs r2, r2, #32
|
||||
ldmdb r1!, {r3, r4, r5, r6}
|
||||
orr lr, lr, ip, pull #\pull
|
||||
mov ip, ip, push #\push
|
||||
orr ip, ip, r9, pull #\pull
|
||||
mov r9, r9, push #\push
|
||||
orr r9, r9, r8, pull #\pull
|
||||
mov r8, r8, push #\push
|
||||
orr r8, r8, r7, pull #\pull
|
||||
mov r7, r7, push #\push
|
||||
orr r7, r7, r6, pull #\pull
|
||||
mov r6, r6, push #\push
|
||||
orr r6, r6, r5, pull #\pull
|
||||
mov r5, r5, push #\push
|
||||
orr r5, r5, r4, pull #\pull
|
||||
mov r4, r4, push #\push
|
||||
orr r4, r4, r3, pull #\pull
|
||||
stmdb r0!, {r4 - r9, ip, lr}
|
||||
bge 12b
|
||||
|
||||
ldmfd sp!, {r5 - r9}
|
||||
|
||||
14: ands ip, r2, #28
|
||||
beq 16f
|
||||
|
||||
15: mov lr, r3, push #\push
|
||||
ldr r3, [r1, #-4]!
|
||||
subs ip, ip, #4
|
||||
orr lr, lr, r3, pull #\pull
|
||||
str lr, [r0, #-4]!
|
||||
bgt 15b
|
||||
|
||||
16: add r1, r1, #(\pull / 8)
|
||||
b 8b
|
||||
|
||||
.endm
|
||||
|
||||
|
||||
backward_copy_shift push=8 pull=24
|
||||
|
||||
17: backward_copy_shift push=16 pull=16
|
||||
|
||||
18: backward_copy_shift push=24 pull=8
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user