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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/geom/geom_pc98/@/arm/arm/support.S |
/*-
* Copyright (c) 2004 Olivier Houchard
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Steve C. Woodford for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Neil A. Carson and Mark Brinicombe
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#include <machine/asmacros.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/arm/arm/support.S 203974 2010-02-16 21:59:17Z imp $");
#include "assym.s"
.L_arm_memcpy:
.word _C_LABEL(_arm_memcpy)
.L_arm_bzero:
.word _C_LABEL(_arm_bzero)
.L_min_memcpy_size:
.word _C_LABEL(_min_memcpy_size)
.L_min_bzero_size:
.word _C_LABEL(_min_bzero_size)
/*
* memset: Sets a block of memory to the specified value
*
* On entry:
* r0 - dest address
* r1 - byte to write
* r2 - number of bytes to write
*
* On exit:
* r0 - dest address
*/
/* LINTSTUB: Func: void bzero(void *, size_t) */
ENTRY(bzero)
ldr r3, .L_arm_bzero
ldr r3, [r3]
cmp r3, #0
beq .Lnormal0
ldr r2, .L_min_bzero_size
ldr r2, [r2]
cmp r1, r2
blt .Lnormal0
stmfd sp!, {r0, r1, lr}
mov r2, #0
mov lr, pc
mov pc, r3
cmp r0, #0
ldmfd sp!, {r0, r1, lr}
RETeq
.Lnormal0:
mov r3, #0x00
b do_memset
/* LINTSTUB: Func: void *memset(void *, int, size_t) */
ENTRY(memset)
and r3, r1, #0xff /* We deal with bytes */
mov r1, r2
do_memset:
cmp r1, #0x04 /* Do we have less than 4 bytes */
mov ip, r0
blt .Lmemset_lessthanfour
/* Ok first we will word align the address */
ands r2, ip, #0x03 /* Get the bottom two bits */
bne .Lmemset_wordunaligned /* The address is not word aligned */
/* We are now word aligned */
.Lmemset_wordaligned:
orr r3, r3, r3, lsl #8 /* Extend value to 16-bits */
#ifdef _ARM_ARCH_5E
tst ip, #0x04 /* Quad-align for armv5e */
#else
cmp r1, #0x10
#endif
orr r3, r3, r3, lsl #16 /* Extend value to 32-bits */
#ifdef _ARM_ARCH_5E
subne r1, r1, #0x04 /* Quad-align if necessary */
strne r3, [ip], #0x04
cmp r1, #0x10
#endif
blt .Lmemset_loop4 /* If less than 16 then use words */
mov r2, r3 /* Duplicate data */
cmp r1, #0x80 /* If < 128 then skip the big loop */
blt .Lmemset_loop32
/* Do 128 bytes at a time */
.Lmemset_loop128:
subs r1, r1, #0x80
#ifdef _ARM_ARCH_5E
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
#else
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
#endif
bgt .Lmemset_loop128
RETeq /* Zero length so just exit */
add r1, r1, #0x80 /* Adjust for extra sub */
/* Do 32 bytes at a time */
.Lmemset_loop32:
subs r1, r1, #0x20
#ifdef _ARM_ARCH_5E
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
strged r2, [ip], #0x08
#else
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
#endif
bgt .Lmemset_loop32
RETeq /* Zero length so just exit */
adds r1, r1, #0x10 /* Partially adjust for extra sub */
/* Deal with 16 bytes or more */
#ifdef _ARM_ARCH_5E
strged r2, [ip], #0x08
strged r2, [ip], #0x08
#else
stmgeia ip!, {r2-r3}
stmgeia ip!, {r2-r3}
#endif
RETeq /* Zero length so just exit */
addlt r1, r1, #0x10 /* Possibly adjust for extra sub */
/* We have at least 4 bytes so copy as words */
.Lmemset_loop4:
subs r1, r1, #0x04
strge r3, [ip], #0x04
bgt .Lmemset_loop4
RETeq /* Zero length so just exit */
#ifdef _ARM_ARCH_5E
/* Compensate for 64-bit alignment check */
adds r1, r1, #0x04
RETeq
cmp r1, #2
#else
cmp r1, #-2
#endif
strb r3, [ip], #0x01 /* Set 1 byte */
strgeb r3, [ip], #0x01 /* Set another byte */
strgtb r3, [ip] /* and a third */
RET /* Exit */
.Lmemset_wordunaligned:
rsb r2, r2, #0x004
strb r3, [ip], #0x01 /* Set 1 byte */
cmp r2, #0x02
strgeb r3, [ip], #0x01 /* Set another byte */
sub r1, r1, r2
strgtb r3, [ip], #0x01 /* and a third */
cmp r1, #0x04 /* More than 4 bytes left? */
bge .Lmemset_wordaligned /* Yup */
.Lmemset_lessthanfour:
cmp r1, #0x00
RETeq /* Zero length so exit */
strb r3, [ip], #0x01 /* Set 1 byte */
cmp r1, #0x02
strgeb r3, [ip], #0x01 /* Set another byte */
strgtb r3, [ip] /* and a third */
RET /* Exit */
ENTRY(bcmp)
mov ip, r0
cmp r2, #0x06
beq .Lmemcmp_6bytes
mov r0, #0x00
/* Are both addresses aligned the same way? */
cmp r2, #0x00
eornes r3, ip, r1
RETeq /* len == 0, or same addresses! */
tst r3, #0x03
subne r2, r2, #0x01
bne .Lmemcmp_bytewise2 /* Badly aligned. Do it the slow way */
/* Word-align the addresses, if necessary */
sub r3, r1, #0x05
ands r3, r3, #0x03
add r3, r3, r3, lsl #1
addne pc, pc, r3, lsl #3
nop
/* Compare up to 3 bytes */
ldrb r0, [ip], #0x01
ldrb r3, [r1], #0x01
subs r0, r0, r3
RETne
subs r2, r2, #0x01
RETeq
/* Compare up to 2 bytes */
ldrb r0, [ip], #0x01
ldrb r3, [r1], #0x01
subs r0, r0, r3
RETne
subs r2, r2, #0x01
RETeq
/* Compare 1 byte */
ldrb r0, [ip], #0x01
ldrb r3, [r1], #0x01
subs r0, r0, r3
RETne
subs r2, r2, #0x01
RETeq
/* Compare 4 bytes at a time, if possible */
subs r2, r2, #0x04
bcc .Lmemcmp_bytewise
.Lmemcmp_word_aligned:
ldr r0, [ip], #0x04
ldr r3, [r1], #0x04
subs r2, r2, #0x04
cmpcs r0, r3
beq .Lmemcmp_word_aligned
sub r0, r0, r3
/* Correct for extra subtraction, and check if done */
adds r2, r2, #0x04
cmpeq r0, #0x00 /* If done, did all bytes match? */
RETeq /* Yup. Just return */
/* Re-do the final word byte-wise */
sub ip, ip, #0x04
sub r1, r1, #0x04
.Lmemcmp_bytewise:
add r2, r2, #0x03
.Lmemcmp_bytewise2:
ldrb r0, [ip], #0x01
ldrb r3, [r1], #0x01
subs r2, r2, #0x01
cmpcs r0, r3
beq .Lmemcmp_bytewise2
sub r0, r0, r3
RET
/*
* 6 byte compares are very common, thanks to the network stack.
* This code is hand-scheduled to reduce the number of stalls for
* load results. Everything else being equal, this will be ~32%
* faster than a byte-wise memcmp.
*/
.align 5
.Lmemcmp_6bytes:
ldrb r3, [r1, #0x00] /* r3 = b2#0 */
ldrb r0, [ip, #0x00] /* r0 = b1#0 */
ldrb r2, [r1, #0x01] /* r2 = b2#1 */
subs r0, r0, r3 /* r0 = b1#0 - b2#0 */
ldreqb r3, [ip, #0x01] /* r3 = b1#1 */
RETne /* Return if mismatch on #0 */
subs r0, r3, r2 /* r0 = b1#1 - b2#1 */
ldreqb r3, [r1, #0x02] /* r3 = b2#2 */
ldreqb r0, [ip, #0x02] /* r0 = b1#2 */
RETne /* Return if mismatch on #1 */
ldrb r2, [r1, #0x03] /* r2 = b2#3 */
subs r0, r0, r3 /* r0 = b1#2 - b2#2 */
ldreqb r3, [ip, #0x03] /* r3 = b1#3 */
RETne /* Return if mismatch on #2 */
subs r0, r3, r2 /* r0 = b1#3 - b2#3 */
ldreqb r3, [r1, #0x04] /* r3 = b2#4 */
ldreqb r0, [ip, #0x04] /* r0 = b1#4 */
RETne /* Return if mismatch on #3 */
ldrb r2, [r1, #0x05] /* r2 = b2#5 */
subs r0, r0, r3 /* r0 = b1#4 - b2#4 */
ldreqb r3, [ip, #0x05] /* r3 = b1#5 */
RETne /* Return if mismatch on #4 */
sub r0, r3, r2 /* r0 = b1#5 - b2#5 */
RET
ENTRY(bcopy)
/* switch the source and destination registers */
eor r0, r1, r0
eor r1, r0, r1
eor r0, r1, r0
ENTRY(memmove)
/* Do the buffers overlap? */
cmp r0, r1
RETeq /* Bail now if src/dst are the same */
subcc r3, r0, r1 /* if (dst > src) r3 = dst - src */
subcs r3, r1, r0 /* if (src > dsr) r3 = src - dst */
cmp r3, r2 /* if (r3 < len) we have an overlap */
bcc PIC_SYM(_C_LABEL(memcpy), PLT)
/* Determine copy direction */
cmp r1, r0
bcc .Lmemmove_backwards
moveq r0, #0 /* Quick abort for len=0 */
RETeq
stmdb sp!, {r0, lr} /* memmove() returns dest addr */
subs r2, r2, #4
blt .Lmemmove_fl4 /* less than 4 bytes */
ands r12, r0, #3
bne .Lmemmove_fdestul /* oh unaligned destination addr */
ands r12, r1, #3
bne .Lmemmove_fsrcul /* oh unaligned source addr */
.Lmemmove_ft8:
/* We have aligned source and destination */
subs r2, r2, #8
blt .Lmemmove_fl12 /* less than 12 bytes (4 from above) */
subs r2, r2, #0x14
blt .Lmemmove_fl32 /* less than 32 bytes (12 from above) */
stmdb sp!, {r4} /* borrow r4 */
/* blat 32 bytes at a time */
/* XXX for really big copies perhaps we should use more registers */
.Lmemmove_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 .Lmemmove_floop32
cmn r2, #0x10
ldmgeia r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
stmgeia r0!, {r3, r4, r12, lr}
subge r2, r2, #0x10
ldmia sp!, {r4} /* return r4 */
.Lmemmove_fl32:
adds r2, r2, #0x14
/* blat 12 bytes at a time */
.Lmemmove_floop12:
ldmgeia r1!, {r3, r12, lr}
stmgeia r0!, {r3, r12, lr}
subges r2, r2, #0x0c
bge .Lmemmove_floop12
.Lmemmove_fl12:
adds r2, r2, #8
blt .Lmemmove_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
.Lmemmove_fl4:
/* less than 4 bytes to go */
adds r2, r2, #4
ldmeqia sp!, {r0, pc} /* done */
/* copy the crud byte at a time */
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}
/* erg - unaligned destination */
.Lmemmove_fdestul:
rsb r12, r12, #4
cmp r12, #2
/* align destination with byte copies */
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 .Lmemmove_fl4 /* less the 4 bytes */
ands r12, r1, #3
beq .Lmemmove_ft8 /* we have an aligned source */
/* erg - unaligned source */
/* This is where it gets nasty ... */
.Lmemmove_fsrcul:
bic r1, r1, #3
ldr lr, [r1], #4
cmp r12, #2
bgt .Lmemmove_fsrcul3
beq .Lmemmove_fsrcul2
cmp r2, #0x0c
blt .Lmemmove_fsrcul1loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemmove_fsrcul1loop16:
#ifdef __ARMEB__
mov r3, lr, lsl #8
#else
mov r3, lr, lsr #8
#endif
ldmia r1!, {r4, r5, r12, lr}
#ifdef __ARMEB__
orr r3, r3, r4, lsr #24
mov r4, r4, lsl #8
orr r4, r4, r5, lsr #24
mov r5, r5, lsl #8
orr r5, r5, r12, lsr #24
mov r12, r12, lsl #8
orr r12, r12, lr, lsr #24
#else
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
#endif
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge .Lmemmove_fsrcul1loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemmove_fsrcul1l4
.Lmemmove_fsrcul1loop4:
#ifdef __ARMEB__
mov r12, lr, lsl #8
#else
mov r12, lr, lsr #8
#endif
ldr lr, [r1], #4
#ifdef __ARMEB__
orr r12, r12, lr, lsr #24
#else
orr r12, r12, lr, lsl #24
#endif
str r12, [r0], #4
subs r2, r2, #4
bge .Lmemmove_fsrcul1loop4
.Lmemmove_fsrcul1l4:
sub r1, r1, #3
b .Lmemmove_fl4
.Lmemmove_fsrcul2:
cmp r2, #0x0c
blt .Lmemmove_fsrcul2loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemmove_fsrcul2loop16:
#ifdef __ARMEB__
mov r3, lr, lsl #16
#else
mov r3, lr, lsr #16
#endif
ldmia r1!, {r4, r5, r12, lr}
#ifdef __ARMEB__
orr r3, r3, r4, lsr #16
mov r4, r4, lsl #16
orr r4, r4, r5, lsr #16
mov r5, r5, lsl #16
orr r5, r5, r12, lsr #16
mov r12, r12, lsl #16
orr r12, r12, lr, lsr #16
#else
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
#endif
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge .Lmemmove_fsrcul2loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemmove_fsrcul2l4
.Lmemmove_fsrcul2loop4:
#ifdef __ARMEB__
mov r12, lr, lsl #16
#else
mov r12, lr, lsr #16
#endif
ldr lr, [r1], #4
#ifdef __ARMEB__
orr r12, r12, lr, lsr #16
#else
orr r12, r12, lr, lsl #16
#endif
str r12, [r0], #4
subs r2, r2, #4
bge .Lmemmove_fsrcul2loop4
.Lmemmove_fsrcul2l4:
sub r1, r1, #2
b .Lmemmove_fl4
.Lmemmove_fsrcul3:
cmp r2, #0x0c
blt .Lmemmove_fsrcul3loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemmove_fsrcul3loop16:
#ifdef __ARMEB__
mov r3, lr, lsl #24
#else
mov r3, lr, lsr #24
#endif
ldmia r1!, {r4, r5, r12, lr}
#ifdef __ARMEB__
orr r3, r3, r4, lsr #8
mov r4, r4, lsl #24
orr r4, r4, r5, lsr #8
mov r5, r5, lsl #24
orr r5, r5, r12, lsr #8
mov r12, r12, lsl #24
orr r12, r12, lr, lsr #8
#else
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
#endif
stmia r0!, {r3-r5, r12}
subs r2, r2, #0x10
bge .Lmemmove_fsrcul3loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemmove_fsrcul3l4
.Lmemmove_fsrcul3loop4:
#ifdef __ARMEB__
mov r12, lr, lsl #24
#else
mov r12, lr, lsr #24
#endif
ldr lr, [r1], #4
#ifdef __ARMEB__
orr r12, r12, lr, lsr #8
#else
orr r12, r12, lr, lsl #8
#endif
str r12, [r0], #4
subs r2, r2, #4
bge .Lmemmove_fsrcul3loop4
.Lmemmove_fsrcul3l4:
sub r1, r1, #1
b .Lmemmove_fl4
.Lmemmove_backwards:
add r1, r1, r2
add r0, r0, r2
subs r2, r2, #4
blt .Lmemmove_bl4 /* less than 4 bytes */
ands r12, r0, #3
bne .Lmemmove_bdestul /* oh unaligned destination addr */
ands r12, r1, #3
bne .Lmemmove_bsrcul /* oh unaligned source addr */
.Lmemmove_bt8:
/* We have aligned source and destination */
subs r2, r2, #8
blt .Lmemmove_bl12 /* less than 12 bytes (4 from above) */
stmdb sp!, {r4, lr}
subs r2, r2, #0x14 /* less than 32 bytes (12 from above) */
blt .Lmemmove_bl32
/* blat 32 bytes at a time */
/* XXX for really big copies perhaps we should use more registers */
.Lmemmove_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 .Lmemmove_bloop32
.Lmemmove_bl32:
cmn r2, #0x10
ldmgedb r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
stmgedb r0!, {r3, r4, r12, lr}
subge r2, r2, #0x10
adds r2, r2, #0x14
ldmgedb r1!, {r3, r12, lr} /* blat a remaining 12 bytes */
stmgedb r0!, {r3, r12, lr}
subge r2, r2, #0x0c
ldmia sp!, {r4, lr}
.Lmemmove_bl12:
adds r2, r2, #8
blt .Lmemmove_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
.Lmemmove_bl4:
/* less than 4 bytes to go */
adds r2, r2, #4
RETeq /* done */
/* copy the crud byte at a time */
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]!
RET
/* erg - unaligned destination */
.Lmemmove_bdestul:
cmp r12, #2
/* align destination with byte copies */
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 .Lmemmove_bl4 /* less than 4 bytes to go */
ands r12, r1, #3
beq .Lmemmove_bt8 /* we have an aligned source */
/* erg - unaligned source */
/* This is where it gets nasty ... */
.Lmemmove_bsrcul:
bic r1, r1, #3
ldr r3, [r1, #0]
cmp r12, #2
blt .Lmemmove_bsrcul1
beq .Lmemmove_bsrcul2
cmp r2, #0x0c
blt .Lmemmove_bsrcul3loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
.Lmemmove_bsrcul3loop16:
#ifdef __ARMEB__
mov lr, r3, lsr #8
#else
mov lr, r3, lsl #8
#endif
ldmdb r1!, {r3-r5, r12}
#ifdef __ARMEB__
orr lr, lr, r12, lsl #24
mov r12, r12, lsr #8
orr r12, r12, r5, lsl #24
mov r5, r5, lsr #8
orr r5, r5, r4, lsl #24
mov r4, r4, lsr #8
orr r4, r4, r3, lsl #24
#else
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
#endif
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge .Lmemmove_bsrcul3loop16
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt .Lmemmove_bsrcul3l4
.Lmemmove_bsrcul3loop4:
#ifdef __ARMEB__
mov r12, r3, lsr #8
#else
mov r12, r3, lsl #8
#endif
ldr r3, [r1, #-4]!
#ifdef __ARMEB__
orr r12, r12, r3, lsl #24
#else
orr r12, r12, r3, lsr #24
#endif
str r12, [r0, #-4]!
subs r2, r2, #4
bge .Lmemmove_bsrcul3loop4
.Lmemmove_bsrcul3l4:
add r1, r1, #3
b .Lmemmove_bl4
.Lmemmove_bsrcul2:
cmp r2, #0x0c
blt .Lmemmove_bsrcul2loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
.Lmemmove_bsrcul2loop16:
#ifdef __ARMEB__
mov lr, r3, lsr #16
#else
mov lr, r3, lsl #16
#endif
ldmdb r1!, {r3-r5, r12}
#ifdef __ARMEB__
orr lr, lr, r12, lsl #16
mov r12, r12, lsr #16
orr r12, r12, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r4, lsl #16
mov r4, r4, lsr #16
orr r4, r4, r3, lsl #16
#else
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
#endif
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge .Lmemmove_bsrcul2loop16
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt .Lmemmove_bsrcul2l4
.Lmemmove_bsrcul2loop4:
#ifdef __ARMEB__
mov r12, r3, lsr #16
#else
mov r12, r3, lsl #16
#endif
ldr r3, [r1, #-4]!
#ifdef __ARMEB__
orr r12, r12, r3, lsl #16
#else
orr r12, r12, r3, lsr #16
#endif
str r12, [r0, #-4]!
subs r2, r2, #4
bge .Lmemmove_bsrcul2loop4
.Lmemmove_bsrcul2l4:
add r1, r1, #2
b .Lmemmove_bl4
.Lmemmove_bsrcul1:
cmp r2, #0x0c
blt .Lmemmove_bsrcul1loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5, lr}
.Lmemmove_bsrcul1loop32:
#ifdef __ARMEB__
mov lr, r3, lsr #24
#else
mov lr, r3, lsl #24
#endif
ldmdb r1!, {r3-r5, r12}
#ifdef __ARMEB__
orr lr, lr, r12, lsl #8
mov r12, r12, lsr #24
orr r12, r12, r5, lsl #8
mov r5, r5, lsr #24
orr r5, r5, r4, lsl #8
mov r4, r4, lsr #24
orr r4, r4, r3, lsl #8
#else
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
#endif
stmdb r0!, {r4, r5, r12, lr}
subs r2, r2, #0x10
bge .Lmemmove_bsrcul1loop32
ldmia sp!, {r4, r5, lr}
adds r2, r2, #0x0c
blt .Lmemmove_bsrcul1l4
.Lmemmove_bsrcul1loop4:
#ifdef __ARMEB__
mov r12, r3, lsr #24
#else
mov r12, r3, lsl #24
#endif
ldr r3, [r1, #-4]!
#ifdef __ARMEB__
orr r12, r12, r3, lsl #8
#else
orr r12, r12, r3, lsr #8
#endif
str r12, [r0, #-4]!
subs r2, r2, #4
bge .Lmemmove_bsrcul1loop4
.Lmemmove_bsrcul1l4:
add r1, r1, #1
b .Lmemmove_bl4
#if !defined(_ARM_ARCH_5E)
ENTRY(memcpy)
/* save leaf functions having to store this away */
/* Do not check arm_memcpy if we're running from flash */
#ifdef FLASHADDR
#if FLASHADDR > PHYSADDR
ldr r3, =FLASHADDR
cmp r3, pc
bls .Lnormal
#else
ldr r3, =FLASHADDR
cmp r3, pc
bhi .Lnormal
#endif
#endif
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, #0
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
RETeq
.Lnormal:
stmdb sp!, {r0, lr} /* memcpy() returns dest addr */
subs r2, r2, #4
blt .Lmemcpy_l4 /* less than 4 bytes */
ands r12, r0, #3
bne .Lmemcpy_destul /* oh unaligned destination addr */
ands r12, r1, #3
bne .Lmemcpy_srcul /* oh unaligned source addr */
.Lmemcpy_t8:
/* We have aligned source and destination */
subs r2, r2, #8
blt .Lmemcpy_l12 /* less than 12 bytes (4 from above) */
subs r2, r2, #0x14
blt .Lmemcpy_l32 /* less than 32 bytes (12 from above) */
stmdb sp!, {r4} /* borrow r4 */
/* blat 32 bytes at a time */
/* XXX for really big copies perhaps we should use more registers */
.Lmemcpy_loop32:
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_loop32
cmn r2, #0x10
ldmgeia r1!, {r3, r4, r12, lr} /* blat a remaining 16 bytes */
stmgeia r0!, {r3, r4, r12, lr}
subge r2, r2, #0x10
ldmia sp!, {r4} /* return r4 */
.Lmemcpy_l32:
adds r2, r2, #0x14
/* blat 12 bytes at a time */
.Lmemcpy_loop12:
ldmgeia r1!, {r3, r12, lr}
stmgeia r0!, {r3, r12, lr}
subges r2, r2, #0x0c
bge .Lmemcpy_loop12
.Lmemcpy_l12:
adds r2, r2, #8
blt .Lmemcpy_l4
subs r2, r2, #4
ldrlt r3, [r1], #4
strlt r3, [r0], #4
ldmgeia r1!, {r3, r12}
stmgeia r0!, {r3, r12}
subge r2, r2, #4
.Lmemcpy_l4:
/* less than 4 bytes to go */
adds r2, r2, #4
#ifdef __APCS_26_
ldmeqia sp!, {r0, pc}^ /* done */
#else
ldmeqia sp!, {r0, pc} /* done */
#endif
/* copy the crud byte at a time */
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}
/* erg - unaligned destination */
.Lmemcpy_destul:
rsb r12, r12, #4
cmp r12, #2
/* align destination with byte copies */
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_l4 /* less the 4 bytes */
ands r12, r1, #3
beq .Lmemcpy_t8 /* we have an aligned source */
/* erg - unaligned source */
/* This is where it gets nasty ... */
.Lmemcpy_srcul:
bic r1, r1, #3
ldr lr, [r1], #4
cmp r12, #2
bgt .Lmemcpy_srcul3
beq .Lmemcpy_srcul2
cmp r2, #0x0c
blt .Lmemcpy_srcul1loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemcpy_srcul1loop16:
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_srcul1loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemcpy_srcul1l4
.Lmemcpy_srcul1loop4:
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_srcul1loop4
.Lmemcpy_srcul1l4:
sub r1, r1, #3
b .Lmemcpy_l4
.Lmemcpy_srcul2:
cmp r2, #0x0c
blt .Lmemcpy_srcul2loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemcpy_srcul2loop16:
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_srcul2loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemcpy_srcul2l4
.Lmemcpy_srcul2loop4:
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_srcul2loop4
.Lmemcpy_srcul2l4:
sub r1, r1, #2
b .Lmemcpy_l4
.Lmemcpy_srcul3:
cmp r2, #0x0c
blt .Lmemcpy_srcul3loop4
sub r2, r2, #0x0c
stmdb sp!, {r4, r5}
.Lmemcpy_srcul3loop16:
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_srcul3loop16
ldmia sp!, {r4, r5}
adds r2, r2, #0x0c
blt .Lmemcpy_srcul3l4
.Lmemcpy_srcul3loop4:
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_srcul3loop4
.Lmemcpy_srcul3l4:
sub r1, r1, #1
b .Lmemcpy_l4
#else
/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */
ENTRY(memcpy)
pld [r1]
cmp r2, #0x0c
ble .Lmemcpy_short /* <= 12 bytes */
#ifdef FLASHADDR
#if FLASHADDR > PHYSADDR
ldr r3, =FLASHADDR
cmp r3, pc
bls .Lnormal
#else
ldr r3, =FLASHADDR
cmp r3, pc
bhi .Lnormal
#endif
#endif
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, #0
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
RETeq
.Lnormal:
mov r3, r0 /* We must not clobber r0 */
/* Word-align the destination buffer */
ands ip, r3, #0x03 /* Already word aligned? */
beq .Lmemcpy_wordaligned /* Yup */
cmp ip, #0x02
ldrb ip, [r1], #0x01
sub r2, r2, #0x01
strb ip, [r3], #0x01
ldrleb ip, [r1], #0x01
suble r2, r2, #0x01
strleb ip, [r3], #0x01
ldrltb ip, [r1], #0x01
sublt r2, r2, #0x01
strltb ip, [r3], #0x01
/* Destination buffer is now word aligned */
.Lmemcpy_wordaligned:
ands ip, r1, #0x03 /* Is src also word-aligned? */
bne .Lmemcpy_bad_align /* Nope. Things just got bad */
/* Quad-align the destination buffer */
tst r3, #0x07 /* Already quad aligned? */
ldrne ip, [r1], #0x04
stmfd sp!, {r4-r9} /* Free up some registers */
subne r2, r2, #0x04
strne ip, [r3], #0x04
/* Destination buffer quad aligned, source is at least word aligned */
subs r2, r2, #0x80
blt .Lmemcpy_w_lessthan128
/* Copy 128 bytes at a time */
.Lmemcpy_w_loop128:
ldr r4, [r1], #0x04 /* LD:00-03 */
ldr r5, [r1], #0x04 /* LD:04-07 */
pld [r1, #0x18] /* Prefetch 0x20 */
ldr r6, [r1], #0x04 /* LD:08-0b */
ldr r7, [r1], #0x04 /* LD:0c-0f */
ldr r8, [r1], #0x04 /* LD:10-13 */
ldr r9, [r1], #0x04 /* LD:14-17 */
strd r4, [r3], #0x08 /* ST:00-07 */
ldr r4, [r1], #0x04 /* LD:18-1b */
ldr r5, [r1], #0x04 /* LD:1c-1f */
strd r6, [r3], #0x08 /* ST:08-0f */
ldr r6, [r1], #0x04 /* LD:20-23 */
ldr r7, [r1], #0x04 /* LD:24-27 */
pld [r1, #0x18] /* Prefetch 0x40 */
strd r8, [r3], #0x08 /* ST:10-17 */
ldr r8, [r1], #0x04 /* LD:28-2b */
ldr r9, [r1], #0x04 /* LD:2c-2f */
strd r4, [r3], #0x08 /* ST:18-1f */
ldr r4, [r1], #0x04 /* LD:30-33 */
ldr r5, [r1], #0x04 /* LD:34-37 */
strd r6, [r3], #0x08 /* ST:20-27 */
ldr r6, [r1], #0x04 /* LD:38-3b */
ldr r7, [r1], #0x04 /* LD:3c-3f */
strd r8, [r3], #0x08 /* ST:28-2f */
ldr r8, [r1], #0x04 /* LD:40-43 */
ldr r9, [r1], #0x04 /* LD:44-47 */
pld [r1, #0x18] /* Prefetch 0x60 */
strd r4, [r3], #0x08 /* ST:30-37 */
ldr r4, [r1], #0x04 /* LD:48-4b */
ldr r5, [r1], #0x04 /* LD:4c-4f */
strd r6, [r3], #0x08 /* ST:38-3f */
ldr r6, [r1], #0x04 /* LD:50-53 */
ldr r7, [r1], #0x04 /* LD:54-57 */
strd r8, [r3], #0x08 /* ST:40-47 */
ldr r8, [r1], #0x04 /* LD:58-5b */
ldr r9, [r1], #0x04 /* LD:5c-5f */
strd r4, [r3], #0x08 /* ST:48-4f */
ldr r4, [r1], #0x04 /* LD:60-63 */
ldr r5, [r1], #0x04 /* LD:64-67 */
pld [r1, #0x18] /* Prefetch 0x80 */
strd r6, [r3], #0x08 /* ST:50-57 */
ldr r6, [r1], #0x04 /* LD:68-6b */
ldr r7, [r1], #0x04 /* LD:6c-6f */
strd r8, [r3], #0x08 /* ST:58-5f */
ldr r8, [r1], #0x04 /* LD:70-73 */
ldr r9, [r1], #0x04 /* LD:74-77 */
strd r4, [r3], #0x08 /* ST:60-67 */
ldr r4, [r1], #0x04 /* LD:78-7b */
ldr r5, [r1], #0x04 /* LD:7c-7f */
strd r6, [r3], #0x08 /* ST:68-6f */
strd r8, [r3], #0x08 /* ST:70-77 */
subs r2, r2, #0x80
strd r4, [r3], #0x08 /* ST:78-7f */
bge .Lmemcpy_w_loop128
.Lmemcpy_w_lessthan128:
adds r2, r2, #0x80 /* Adjust for extra sub */
ldmeqfd sp!, {r4-r9}
RETeq /* Return now if done */
subs r2, r2, #0x20
blt .Lmemcpy_w_lessthan32
/* Copy 32 bytes at a time */
.Lmemcpy_w_loop32:
ldr r4, [r1], #0x04
ldr r5, [r1], #0x04
pld [r1, #0x18]
ldr r6, [r1], #0x04
ldr r7, [r1], #0x04
ldr r8, [r1], #0x04
ldr r9, [r1], #0x04
strd r4, [r3], #0x08
ldr r4, [r1], #0x04
ldr r5, [r1], #0x04
strd r6, [r3], #0x08
strd r8, [r3], #0x08
subs r2, r2, #0x20
strd r4, [r3], #0x08
bge .Lmemcpy_w_loop32
.Lmemcpy_w_lessthan32:
adds r2, r2, #0x20 /* Adjust for extra sub */
ldmeqfd sp!, {r4-r9}
RETeq /* Return now if done */
and r4, r2, #0x18
rsbs r4, r4, #0x18
addne pc, pc, r4, lsl #1
nop
/* At least 24 bytes remaining */
ldr r4, [r1], #0x04
ldr r5, [r1], #0x04
sub r2, r2, #0x08
strd r4, [r3], #0x08
/* At least 16 bytes remaining */
ldr r4, [r1], #0x04
ldr r5, [r1], #0x04
sub r2, r2, #0x08
strd r4, [r3], #0x08
/* At least 8 bytes remaining */
ldr r4, [r1], #0x04
ldr r5, [r1], #0x04
subs r2, r2, #0x08
strd r4, [r3], #0x08
/* Less than 8 bytes remaining */
ldmfd sp!, {r4-r9}
RETeq /* Return now if done */
subs r2, r2, #0x04
ldrge ip, [r1], #0x04
strge ip, [r3], #0x04
RETeq /* Return now if done */
addlt r2, r2, #0x04
ldrb ip, [r1], #0x01
cmp r2, #0x02
ldrgeb r2, [r1], #0x01
strb ip, [r3], #0x01
ldrgtb ip, [r1]
strgeb r2, [r3], #0x01
strgtb ip, [r3]
RET
/*
* At this point, it has not been possible to word align both buffers.
* The destination buffer is word aligned, but the source buffer is not.
*/
.Lmemcpy_bad_align:
stmfd sp!, {r4-r7}
bic r1, r1, #0x03
cmp ip, #2
ldr ip, [r1], #0x04
bgt .Lmemcpy_bad3
beq .Lmemcpy_bad2
b .Lmemcpy_bad1
.Lmemcpy_bad1_loop16:
#ifdef __ARMEB__
mov r4, ip, lsl #8
#else
mov r4, ip, lsr #8
#endif
ldr r5, [r1], #0x04
pld [r1, #0x018]
ldr r6, [r1], #0x04
ldr r7, [r1], #0x04
ldr ip, [r1], #0x04
#ifdef __ARMEB__
orr r4, r4, r5, lsr #24
mov r5, r5, lsl #8
orr r5, r5, r6, lsr #24
mov r6, r6, lsl #8
orr r6, r6, r7, lsr #24
mov r7, r7, lsl #8
orr r7, r7, ip, lsr #24
#else
orr r4, r4, r5, lsl #24
mov r5, r5, lsr #8
orr r5, r5, r6, lsl #24
mov r6, r6, lsr #8
orr r6, r6, r7, lsl #24
mov r7, r7, lsr #8
orr r7, r7, ip, lsl #24
#endif
str r4, [r3], #0x04
str r5, [r3], #0x04
str r6, [r3], #0x04
str r7, [r3], #0x04
.Lmemcpy_bad1:
subs r2, r2, #0x10
bge .Lmemcpy_bad1_loop16
adds r2, r2, #0x10
ldmeqfd sp!, {r4-r7}
RETeq /* Return now if done */
subs r2, r2, #0x04
sublt r1, r1, #0x03
blt .Lmemcpy_bad_done
.Lmemcpy_bad1_loop4:
#ifdef __ARMEB__
mov r4, ip, lsl #8
#else
mov r4, ip, lsr #8
#endif
ldr ip, [r1], #0x04
subs r2, r2, #0x04
#ifdef __ARMEB__
orr r4, r4, ip, lsr #24
#else
orr r4, r4, ip, lsl #24
#endif
str r4, [r3], #0x04
bge .Lmemcpy_bad1_loop4
sub r1, r1, #0x03
b .Lmemcpy_bad_done
.Lmemcpy_bad2_loop16:
#ifdef __ARMEB__
mov r4, ip, lsl #16
#else
mov r4, ip, lsr #16
#endif
ldr r5, [r1], #0x04
pld [r1, #0x018]
ldr r6, [r1], #0x04
ldr r7, [r1], #0x04
ldr ip, [r1], #0x04
#ifdef __ARMEB__
orr r4, r4, r5, lsr #16
mov r5, r5, lsl #16
orr r5, r5, r6, lsr #16
mov r6, r6, lsl #16
orr r6, r6, r7, lsr #16
mov r7, r7, lsl #16
orr r7, r7, ip, lsr #16
#else
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
mov r6, r6, lsr #16
orr r6, r6, r7, lsl #16
mov r7, r7, lsr #16
orr r7, r7, ip, lsl #16
#endif
str r4, [r3], #0x04
str r5, [r3], #0x04
str r6, [r3], #0x04
str r7, [r3], #0x04
.Lmemcpy_bad2:
subs r2, r2, #0x10
bge .Lmemcpy_bad2_loop16
adds r2, r2, #0x10
ldmeqfd sp!, {r4-r7}
RETeq /* Return now if done */
subs r2, r2, #0x04
sublt r1, r1, #0x02
blt .Lmemcpy_bad_done
.Lmemcpy_bad2_loop4:
#ifdef __ARMEB__
mov r4, ip, lsl #16
#else
mov r4, ip, lsr #16
#endif
ldr ip, [r1], #0x04
subs r2, r2, #0x04
#ifdef __ARMEB__
orr r4, r4, ip, lsr #16
#else
orr r4, r4, ip, lsl #16
#endif
str r4, [r3], #0x04
bge .Lmemcpy_bad2_loop4
sub r1, r1, #0x02
b .Lmemcpy_bad_done
.Lmemcpy_bad3_loop16:
#ifdef __ARMEB__
mov r4, ip, lsl #24
#else
mov r4, ip, lsr #24
#endif
ldr r5, [r1], #0x04
pld [r1, #0x018]
ldr r6, [r1], #0x04
ldr r7, [r1], #0x04
ldr ip, [r1], #0x04
#ifdef __ARMEB__
orr r4, r4, r5, lsr #8
mov r5, r5, lsl #24
orr r5, r5, r6, lsr #8
mov r6, r6, lsl #24
orr r6, r6, r7, lsr #8
mov r7, r7, lsl #24
orr r7, r7, ip, lsr #8
#else
orr r4, r4, r5, lsl #8
mov r5, r5, lsr #24
orr r5, r5, r6, lsl #8
mov r6, r6, lsr #24
orr r6, r6, r7, lsl #8
mov r7, r7, lsr #24
orr r7, r7, ip, lsl #8
#endif
str r4, [r3], #0x04
str r5, [r3], #0x04
str r6, [r3], #0x04
str r7, [r3], #0x04
.Lmemcpy_bad3:
subs r2, r2, #0x10
bge .Lmemcpy_bad3_loop16
adds r2, r2, #0x10
ldmeqfd sp!, {r4-r7}
RETeq /* Return now if done */
subs r2, r2, #0x04
sublt r1, r1, #0x01
blt .Lmemcpy_bad_done
.Lmemcpy_bad3_loop4:
#ifdef __ARMEB__
mov r4, ip, lsl #24
#else
mov r4, ip, lsr #24
#endif
ldr ip, [r1], #0x04
subs r2, r2, #0x04
#ifdef __ARMEB__
orr r4, r4, ip, lsr #8
#else
orr r4, r4, ip, lsl #8
#endif
str r4, [r3], #0x04
bge .Lmemcpy_bad3_loop4
sub r1, r1, #0x01
.Lmemcpy_bad_done:
ldmfd sp!, {r4-r7}
adds r2, r2, #0x04
RETeq
ldrb ip, [r1], #0x01
cmp r2, #0x02
ldrgeb r2, [r1], #0x01
strb ip, [r3], #0x01
ldrgtb ip, [r1]
strgeb r2, [r3], #0x01
strgtb ip, [r3]
RET
/*
* Handle short copies (less than 16 bytes), possibly misaligned.
* Some of these are *very* common, thanks to the network stack,
* and so are handled specially.
*/
.Lmemcpy_short:
add pc, pc, r2, lsl #2
nop
RET /* 0x00 */
b .Lmemcpy_bytewise /* 0x01 */
b .Lmemcpy_bytewise /* 0x02 */
b .Lmemcpy_bytewise /* 0x03 */
b .Lmemcpy_4 /* 0x04 */
b .Lmemcpy_bytewise /* 0x05 */
b .Lmemcpy_6 /* 0x06 */
b .Lmemcpy_bytewise /* 0x07 */
b .Lmemcpy_8 /* 0x08 */
b .Lmemcpy_bytewise /* 0x09 */
b .Lmemcpy_bytewise /* 0x0a */
b .Lmemcpy_bytewise /* 0x0b */
b .Lmemcpy_c /* 0x0c */
.Lmemcpy_bytewise:
mov r3, r0 /* We must not clobber r0 */
ldrb ip, [r1], #0x01
1: subs r2, r2, #0x01
strb ip, [r3], #0x01
ldrneb ip, [r1], #0x01
bne 1b
RET
/******************************************************************************
* Special case for 4 byte copies
*/
#define LMEMCPY_4_LOG2 6 /* 64 bytes */
#define LMEMCPY_4_PAD .align LMEMCPY_4_LOG2
LMEMCPY_4_PAD
.Lmemcpy_4:
and r2, r1, #0x03
orr r2, r2, r0, lsl #2
ands r2, r2, #0x0f
sub r3, pc, #0x14
addne pc, r3, r2, lsl #LMEMCPY_4_LOG2
/*
* 0000: dst is 32-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
str r2, [r0]
RET
LMEMCPY_4_PAD
/*
* 0001: dst is 32-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */
ldr r2, [r1, #3] /* BE:r2 = 3xxx LE:r2 = xxx3 */
#ifdef __ARMEB__
mov r3, r3, lsl #8 /* r3 = 012. */
orr r3, r3, r2, lsr #24 /* r3 = 0123 */
#else
mov r3, r3, lsr #8 /* r3 = .210 */
orr r3, r3, r2, lsl #24 /* r3 = 3210 */
#endif
str r3, [r0]
RET
LMEMCPY_4_PAD
/*
* 0010: dst is 32-bit aligned, src is 16-bit aligned
*/
#ifdef __ARMEB__
ldrh r3, [r1]
ldrh r2, [r1, #0x02]
#else
ldrh r3, [r1, #0x02]
ldrh r2, [r1]
#endif
orr r3, r2, r3, lsl #16
str r3, [r0]
RET
LMEMCPY_4_PAD
/*
* 0011: dst is 32-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #-3] /* BE:r3 = xxx0 LE:r3 = 0xxx */
ldr r2, [r1, #1] /* BE:r2 = 123x LE:r2 = x321 */
#ifdef __ARMEB__
mov r3, r3, lsl #24 /* r3 = 0... */
orr r3, r3, r2, lsr #8 /* r3 = 0123 */
#else
mov r3, r3, lsr #24 /* r3 = ...0 */
orr r3, r3, r2, lsl #8 /* r3 = 3210 */
#endif
str r3, [r0]
RET
LMEMCPY_4_PAD
/*
* 0100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
#ifdef __ARMEB__
strb r2, [r0, #0x03]
mov r3, r2, lsr #8
mov r1, r2, lsr #24
strb r1, [r0]
#else
strb r2, [r0]
mov r3, r2, lsr #8
mov r1, r2, lsr #24
strb r1, [r0, #0x03]
#endif
strh r3, [r0, #0x01]
RET
LMEMCPY_4_PAD
/*
* 0101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrb r1, [r1, #0x03]
strb r2, [r0]
strh r3, [r0, #0x01]
strb r1, [r0, #0x03]
RET
LMEMCPY_4_PAD
/*
* 0110: dst is 8-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldrh r3, [r1, #0x02] /* LE:r3 = ..23 LE:r3 = ..32 */
#ifdef __ARMEB__
mov r1, r2, lsr #8 /* r1 = ...0 */
strb r1, [r0]
mov r2, r2, lsl #8 /* r2 = .01. */
orr r2, r2, r3, lsr #8 /* r2 = .012 */
#else
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = ...1 */
orr r2, r2, r3, lsl #8 /* r2 = .321 */
mov r3, r3, lsr #8 /* r3 = ...3 */
#endif
strh r2, [r0, #0x01]
strb r3, [r0, #0x03]
RET
LMEMCPY_4_PAD
/*
* 0111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrb r1, [r1, #0x03]
strb r2, [r0]
strh r3, [r0, #0x01]
strb r1, [r0, #0x03]
RET
LMEMCPY_4_PAD
/*
* 1000: dst is 16-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
#ifdef __ARMEB__
strh r2, [r0, #0x02]
mov r3, r2, lsr #16
strh r3, [r0]
#else
strh r2, [r0]
mov r3, r2, lsr #16
strh r3, [r0, #0x02]
#endif
RET
LMEMCPY_4_PAD
/*
* 1001: dst is 16-bit aligned, src is 8-bit aligned
*/
ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */
ldr r3, [r1, #3] /* BE:r3 = 3xxx LE:r3 = xxx3 */
mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */
strh r1, [r0]
#ifdef __ARMEB__
mov r2, r2, lsl #8 /* r2 = 012. */
orr r2, r2, r3, lsr #24 /* r2 = 0123 */
#else
mov r2, r2, lsr #24 /* r2 = ...2 */
orr r2, r2, r3, lsl #8 /* r2 = xx32 */
#endif
strh r2, [r0, #0x02]
RET
LMEMCPY_4_PAD
/*
* 1010: dst is 16-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1]
ldrh r3, [r1, #0x02]
strh r2, [r0]
strh r3, [r0, #0x02]
RET
LMEMCPY_4_PAD
/*
* 1011: dst is 16-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #1] /* BE:r3 = 123x LE:r3 = x321 */
ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */
mov r1, r3, lsr #8 /* BE:r1 = .123 LE:r1 = .x32 */
strh r1, [r0, #0x02]
#ifdef __ARMEB__
mov r3, r3, lsr #24 /* r3 = ...1 */
orr r3, r3, r2, lsl #8 /* r3 = xx01 */
#else
mov r3, r3, lsl #8 /* r3 = 321. */
orr r3, r3, r2, lsr #24 /* r3 = 3210 */
#endif
strh r3, [r0]
RET
LMEMCPY_4_PAD
/*
* 1100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
#ifdef __ARMEB__
strb r2, [r0, #0x03]
mov r3, r2, lsr #8
mov r1, r2, lsr #24
strh r3, [r0, #0x01]
strb r1, [r0]
#else
strb r2, [r0]
mov r3, r2, lsr #8
mov r1, r2, lsr #24
strh r3, [r0, #0x01]
strb r1, [r0, #0x03]
#endif
RET
LMEMCPY_4_PAD
/*
* 1101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrb r1, [r1, #0x03]
strb r2, [r0]
strh r3, [r0, #0x01]
strb r1, [r0, #0x03]
RET
LMEMCPY_4_PAD
/*
* 1110: dst is 8-bit aligned, src is 16-bit aligned
*/
#ifdef __ARMEB__
ldrh r3, [r1, #0x02] /* BE:r3 = ..23 LE:r3 = ..32 */
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
strb r3, [r0, #0x03]
mov r3, r3, lsr #8 /* r3 = ...2 */
orr r3, r3, r2, lsl #8 /* r3 = ..12 */
strh r3, [r0, #0x01]
mov r2, r2, lsr #8 /* r2 = ...0 */
strb r2, [r0]
#else
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldrh r3, [r1, #0x02] /* BE:r3 = ..23 LE:r3 = ..32 */
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = ...1 */
orr r2, r2, r3, lsl #8 /* r2 = .321 */
strh r2, [r0, #0x01]
mov r3, r3, lsr #8 /* r3 = ...3 */
strb r3, [r0, #0x03]
#endif
RET
LMEMCPY_4_PAD
/*
* 1111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrb r1, [r1, #0x03]
strb r2, [r0]
strh r3, [r0, #0x01]
strb r1, [r0, #0x03]
RET
LMEMCPY_4_PAD
/******************************************************************************
* Special case for 6 byte copies
*/
#define LMEMCPY_6_LOG2 6 /* 64 bytes */
#define LMEMCPY_6_PAD .align LMEMCPY_6_LOG2
LMEMCPY_6_PAD
.Lmemcpy_6:
and r2, r1, #0x03
orr r2, r2, r0, lsl #2
ands r2, r2, #0x0f
sub r3, pc, #0x14
addne pc, r3, r2, lsl #LMEMCPY_6_LOG2
/*
* 0000: dst is 32-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
ldrh r3, [r1, #0x04]
str r2, [r0]
strh r3, [r0, #0x04]
RET
LMEMCPY_6_PAD
/*
* 0001: dst is 32-bit aligned, src is 8-bit aligned
*/
ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */
ldr r3, [r1, #0x03] /* BE:r3 = 345x LE:r3 = x543 */
#ifdef __ARMEB__
mov r2, r2, lsl #8 /* r2 = 012. */
orr r2, r2, r3, lsr #24 /* r2 = 0123 */
#else
mov r2, r2, lsr #8 /* r2 = .210 */
orr r2, r2, r3, lsl #24 /* r2 = 3210 */
#endif
mov r3, r3, lsr #8 /* BE:r3 = .345 LE:r3 = .x54 */
str r2, [r0]
strh r3, [r0, #0x04]
RET
LMEMCPY_6_PAD
/*
* 0010: dst is 32-bit aligned, src is 16-bit aligned
*/
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
#ifdef __ARMEB__
mov r1, r3, lsr #16 /* r1 = ..23 */
orr r1, r1, r2, lsl #16 /* r1 = 0123 */
str r1, [r0]
strh r3, [r0, #0x04]
#else
mov r1, r3, lsr #16 /* r1 = ..54 */
orr r2, r2, r3, lsl #16 /* r2 = 3210 */
str r2, [r0]
strh r1, [r0, #0x04]
#endif
RET
LMEMCPY_6_PAD
/*
* 0011: dst is 32-bit aligned, src is 8-bit aligned
*/
ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */
ldr r3, [r1, #1] /* BE:r3 = 1234 LE:r3 = 4321 */
ldr r1, [r1, #5] /* BE:r1 = 5xxx LE:r3 = xxx5 */
#ifdef __ARMEB__
mov r2, r2, lsl #24 /* r2 = 0... */
orr r2, r2, r3, lsr #8 /* r2 = 0123 */
mov r3, r3, lsl #8 /* r3 = 234. */
orr r1, r3, r1, lsr #24 /* r1 = 2345 */
#else
mov r2, r2, lsr #24 /* r2 = ...0 */
orr r2, r2, r3, lsl #8 /* r2 = 3210 */
mov r1, r1, lsl #8 /* r1 = xx5. */
orr r1, r1, r3, lsr #24 /* r1 = xx54 */
#endif
str r2, [r0]
strh r1, [r0, #0x04]
RET
LMEMCPY_6_PAD
/*
* 0100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */
ldrh r2, [r1, #0x04] /* BE:r2 = ..45 LE:r2 = ..54 */
mov r1, r3, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */
strh r1, [r0, #0x01]
#ifdef __ARMEB__
mov r1, r3, lsr #24 /* r1 = ...0 */
strb r1, [r0]
mov r3, r3, lsl #8 /* r3 = 123. */
orr r3, r3, r2, lsr #8 /* r3 = 1234 */
#else
strb r3, [r0]
mov r3, r3, lsr #24 /* r3 = ...3 */
orr r3, r3, r2, lsl #8 /* r3 = .543 */
mov r2, r2, lsr #8 /* r2 = ...5 */
#endif
strh r3, [r0, #0x03]
strb r2, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 0101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrh ip, [r1, #0x03]
ldrb r1, [r1, #0x05]
strb r2, [r0]
strh r3, [r0, #0x01]
strh ip, [r0, #0x03]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 0110: dst is 8-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */
#ifdef __ARMEB__
mov r3, r2, lsr #8 /* r3 = ...0 */
strb r3, [r0]
strb r1, [r0, #0x05]
mov r3, r1, lsr #8 /* r3 = .234 */
strh r3, [r0, #0x03]
mov r3, r2, lsl #8 /* r3 = .01. */
orr r3, r3, r1, lsr #24 /* r3 = .012 */
strh r3, [r0, #0x01]
#else
strb r2, [r0]
mov r3, r1, lsr #24
strb r3, [r0, #0x05]
mov r3, r1, lsr #8 /* r3 = .543 */
strh r3, [r0, #0x03]
mov r3, r2, lsr #8 /* r3 = ...1 */
orr r3, r3, r1, lsl #8 /* r3 = 4321 */
strh r3, [r0, #0x01]
#endif
RET
LMEMCPY_6_PAD
/*
* 0111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrh ip, [r1, #0x03]
ldrb r1, [r1, #0x05]
strb r2, [r0]
strh r3, [r0, #0x01]
strh ip, [r0, #0x03]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 1000: dst is 16-bit aligned, src is 32-bit aligned
*/
#ifdef __ARMEB__
ldr r2, [r1] /* r2 = 0123 */
ldrh r3, [r1, #0x04] /* r3 = ..45 */
mov r1, r2, lsr #16 /* r1 = ..01 */
orr r3, r3, r2, lsl#16 /* r3 = 2345 */
strh r1, [r0]
str r3, [r0, #0x02]
#else
ldrh r2, [r1, #0x04] /* r2 = ..54 */
ldr r3, [r1] /* r3 = 3210 */
mov r2, r2, lsl #16 /* r2 = 54.. */
orr r2, r2, r3, lsr #16 /* r2 = 5432 */
strh r3, [r0]
str r2, [r0, #0x02]
#endif
RET
LMEMCPY_6_PAD
/*
* 1001: dst is 16-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */
ldr r2, [r1, #3] /* BE:r2 = 345x LE:r2 = x543 */
mov r1, r3, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */
#ifdef __ARMEB__
mov r2, r2, lsr #8 /* r2 = .345 */
orr r2, r2, r3, lsl #24 /* r2 = 2345 */
#else
mov r2, r2, lsl #8 /* r2 = 543. */
orr r2, r2, r3, lsr #24 /* r2 = 5432 */
#endif
strh r1, [r0]
str r2, [r0, #0x02]
RET
LMEMCPY_6_PAD
/*
* 1010: dst is 16-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1]
ldr r3, [r1, #0x02]
strh r2, [r0]
str r3, [r0, #0x02]
RET
LMEMCPY_6_PAD
/*
* 1011: dst is 16-bit aligned, src is 8-bit aligned
*/
ldrb r3, [r1] /* r3 = ...0 */
ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */
ldrb r1, [r1, #0x05] /* r1 = ...5 */
#ifdef __ARMEB__
mov r3, r3, lsl #8 /* r3 = ..0. */
orr r3, r3, r2, lsr #24 /* r3 = ..01 */
orr r1, r1, r2, lsl #8 /* r1 = 2345 */
#else
orr r3, r3, r2, lsl #8 /* r3 = 3210 */
mov r1, r1, lsl #24 /* r1 = 5... */
orr r1, r1, r2, lsr #8 /* r1 = 5432 */
#endif
strh r3, [r0]
str r1, [r0, #0x02]
RET
LMEMCPY_6_PAD
/*
* 1100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
ldrh r1, [r1, #0x04] /* BE:r1 = ..45 LE:r1 = ..54 */
#ifdef __ARMEB__
mov r3, r2, lsr #24 /* r3 = ...0 */
strb r3, [r0]
mov r2, r2, lsl #8 /* r2 = 123. */
orr r2, r2, r1, lsr #8 /* r2 = 1234 */
#else
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = .321 */
orr r2, r2, r1, lsl #24 /* r2 = 4321 */
mov r1, r1, lsr #8 /* r1 = ...5 */
#endif
str r2, [r0, #0x01]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 1101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldrh ip, [r1, #0x03]
ldrb r1, [r1, #0x05]
strb r2, [r0]
strh r3, [r0, #0x01]
strh ip, [r0, #0x03]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 1110: dst is 8-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */
#ifdef __ARMEB__
mov r3, r2, lsr #8 /* r3 = ...0 */
strb r3, [r0]
mov r2, r2, lsl #24 /* r2 = 1... */
orr r2, r2, r1, lsr #8 /* r2 = 1234 */
#else
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = ...1 */
orr r2, r2, r1, lsl #8 /* r2 = 4321 */
mov r1, r1, lsr #24 /* r1 = ...5 */
#endif
str r2, [r0, #0x01]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/*
* 1111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldr r3, [r1, #0x01]
ldrb r1, [r1, #0x05]
strb r2, [r0]
str r3, [r0, #0x01]
strb r1, [r0, #0x05]
RET
LMEMCPY_6_PAD
/******************************************************************************
* Special case for 8 byte copies
*/
#define LMEMCPY_8_LOG2 6 /* 64 bytes */
#define LMEMCPY_8_PAD .align LMEMCPY_8_LOG2
LMEMCPY_8_PAD
.Lmemcpy_8:
and r2, r1, #0x03
orr r2, r2, r0, lsl #2
ands r2, r2, #0x0f
sub r3, pc, #0x14
addne pc, r3, r2, lsl #LMEMCPY_8_LOG2
/*
* 0000: dst is 32-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
ldr r3, [r1, #0x04]
str r2, [r0]
str r3, [r0, #0x04]
RET
LMEMCPY_8_PAD
/*
* 0001: dst is 32-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */
ldr r2, [r1, #0x03] /* BE:r2 = 3456 LE:r2 = 6543 */
ldrb r1, [r1, #0x07] /* r1 = ...7 */
#ifdef __ARMEB__
mov r3, r3, lsl #8 /* r3 = 012. */
orr r3, r3, r2, lsr #24 /* r3 = 0123 */
orr r2, r1, r2, lsl #8 /* r2 = 4567 */
#else
mov r3, r3, lsr #8 /* r3 = .210 */
orr r3, r3, r2, lsl #24 /* r3 = 3210 */
mov r1, r1, lsl #24 /* r1 = 7... */
orr r2, r1, r2, lsr #8 /* r2 = 7654 */
#endif
str r3, [r0]
str r2, [r0, #0x04]
RET
LMEMCPY_8_PAD
/*
* 0010: dst is 32-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */
#ifdef __ARMEB__
mov r2, r2, lsl #16 /* r2 = 01.. */
orr r2, r2, r3, lsr #16 /* r2 = 0123 */
orr r3, r1, r3, lsl #16 /* r3 = 4567 */
#else
orr r2, r2, r3, lsl #16 /* r2 = 3210 */
mov r3, r3, lsr #16 /* r3 = ..54 */
orr r3, r3, r1, lsl #16 /* r3 = 7654 */
#endif
str r2, [r0]
str r3, [r0, #0x04]
RET
LMEMCPY_8_PAD
/*
* 0011: dst is 32-bit aligned, src is 8-bit aligned
*/
ldrb r3, [r1] /* r3 = ...0 */
ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */
ldr r1, [r1, #0x05] /* BE:r1 = 567x LE:r1 = x765 */
#ifdef __ARMEB__
mov r3, r3, lsl #24 /* r3 = 0... */
orr r3, r3, r2, lsr #8 /* r3 = 0123 */
mov r2, r2, lsl #24 /* r2 = 4... */
orr r2, r2, r1, lsr #8 /* r2 = 4567 */
#else
orr r3, r3, r2, lsl #8 /* r3 = 3210 */
mov r2, r2, lsr #24 /* r2 = ...4 */
orr r2, r2, r1, lsl #8 /* r2 = 7654 */
#endif
str r3, [r0]
str r2, [r0, #0x04]
RET
LMEMCPY_8_PAD
/*
* 0100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */
ldr r2, [r1, #0x04] /* BE:r2 = 4567 LE:r2 = 7654 */
#ifdef __ARMEB__
mov r1, r3, lsr #24 /* r1 = ...0 */
strb r1, [r0]
mov r1, r3, lsr #8 /* r1 = .012 */
strb r2, [r0, #0x07]
mov r3, r3, lsl #24 /* r3 = 3... */
orr r3, r3, r2, lsr #8 /* r3 = 3456 */
#else
strb r3, [r0]
mov r1, r2, lsr #24 /* r1 = ...7 */
strb r1, [r0, #0x07]
mov r1, r3, lsr #8 /* r1 = .321 */
mov r3, r3, lsr #24 /* r3 = ...3 */
orr r3, r3, r2, lsl #8 /* r3 = 6543 */
#endif
strh r1, [r0, #0x01]
str r3, [r0, #0x03]
RET
LMEMCPY_8_PAD
/*
* 0101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldr ip, [r1, #0x03]
ldrb r1, [r1, #0x07]
strb r2, [r0]
strh r3, [r0, #0x01]
str ip, [r0, #0x03]
strb r1, [r0, #0x07]
RET
LMEMCPY_8_PAD
/*
* 0110: dst is 8-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */
#ifdef __ARMEB__
mov ip, r2, lsr #8 /* ip = ...0 */
strb ip, [r0]
mov ip, r2, lsl #8 /* ip = .01. */
orr ip, ip, r3, lsr #24 /* ip = .012 */
strb r1, [r0, #0x07]
mov r3, r3, lsl #8 /* r3 = 345. */
orr r3, r3, r1, lsr #8 /* r3 = 3456 */
#else
strb r2, [r0] /* 0 */
mov ip, r1, lsr #8 /* ip = ...7 */
strb ip, [r0, #0x07] /* 7 */
mov ip, r2, lsr #8 /* ip = ...1 */
orr ip, ip, r3, lsl #8 /* ip = 4321 */
mov r3, r3, lsr #8 /* r3 = .543 */
orr r3, r3, r1, lsl #24 /* r3 = 6543 */
#endif
strh ip, [r0, #0x01]
str r3, [r0, #0x03]
RET
LMEMCPY_8_PAD
/*
* 0111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r3, [r1] /* r3 = ...0 */
ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */
ldrh r2, [r1, #0x05] /* BE:r2 = ..56 LE:r2 = ..65 */
ldrb r1, [r1, #0x07] /* r1 = ...7 */
strb r3, [r0]
mov r3, ip, lsr #16 /* BE:r3 = ..12 LE:r3 = ..43 */
#ifdef __ARMEB__
strh r3, [r0, #0x01]
orr r2, r2, ip, lsl #16 /* r2 = 3456 */
#else
strh ip, [r0, #0x01]
orr r2, r3, r2, lsl #16 /* r2 = 6543 */
#endif
str r2, [r0, #0x03]
strb r1, [r0, #0x07]
RET
LMEMCPY_8_PAD
/*
* 1000: dst is 16-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */
mov r1, r2, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */
#ifdef __ARMEB__
strh r1, [r0]
mov r1, r3, lsr #16 /* r1 = ..45 */
orr r2, r1 ,r2, lsl #16 /* r2 = 2345 */
#else
strh r2, [r0]
orr r2, r1, r3, lsl #16 /* r2 = 5432 */
mov r3, r3, lsr #16 /* r3 = ..76 */
#endif
str r2, [r0, #0x02]
strh r3, [r0, #0x06]
RET
LMEMCPY_8_PAD
/*
* 1001: dst is 16-bit aligned, src is 8-bit aligned
*/
ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */
ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */
ldrb ip, [r1, #0x07] /* ip = ...7 */
mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */
strh r1, [r0]
#ifdef __ARMEB__
mov r1, r2, lsl #24 /* r1 = 2... */
orr r1, r1, r3, lsr #8 /* r1 = 2345 */
orr r3, ip, r3, lsl #8 /* r3 = 4567 */
#else
mov r1, r2, lsr #24 /* r1 = ...2 */
orr r1, r1, r3, lsl #8 /* r1 = 5432 */
mov r3, r3, lsr #24 /* r3 = ...6 */
orr r3, r3, ip, lsl #8 /* r3 = ..76 */
#endif
str r1, [r0, #0x02]
strh r3, [r0, #0x06]
RET
LMEMCPY_8_PAD
/*
* 1010: dst is 16-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1]
ldr ip, [r1, #0x02]
ldrh r3, [r1, #0x06]
strh r2, [r0]
str ip, [r0, #0x02]
strh r3, [r0, #0x06]
RET
LMEMCPY_8_PAD
/*
* 1011: dst is 16-bit aligned, src is 8-bit aligned
*/
ldr r3, [r1, #0x05] /* BE:r3 = 567x LE:r3 = x765 */
ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */
ldrb ip, [r1] /* ip = ...0 */
mov r1, r3, lsr #8 /* BE:r1 = .567 LE:r1 = .x76 */
strh r1, [r0, #0x06]
#ifdef __ARMEB__
mov r3, r3, lsr #24 /* r3 = ...5 */
orr r3, r3, r2, lsl #8 /* r3 = 2345 */
mov r2, r2, lsr #24 /* r2 = ...1 */
orr r2, r2, ip, lsl #8 /* r2 = ..01 */
#else
mov r3, r3, lsl #24 /* r3 = 5... */
orr r3, r3, r2, lsr #8 /* r3 = 5432 */
orr r2, ip, r2, lsl #8 /* r2 = 3210 */
#endif
str r3, [r0, #0x02]
strh r2, [r0]
RET
LMEMCPY_8_PAD
/*
* 1100: dst is 8-bit aligned, src is 32-bit aligned
*/
ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
mov r1, r3, lsr #8 /* BE:r1 = .456 LE:r1 = .765 */
strh r1, [r0, #0x05]
#ifdef __ARMEB__
strb r3, [r0, #0x07]
mov r1, r2, lsr #24 /* r1 = ...0 */
strb r1, [r0]
mov r2, r2, lsl #8 /* r2 = 123. */
orr r2, r2, r3, lsr #24 /* r2 = 1234 */
str r2, [r0, #0x01]
#else
strb r2, [r0]
mov r1, r3, lsr #24 /* r1 = ...7 */
strb r1, [r0, #0x07]
mov r2, r2, lsr #8 /* r2 = .321 */
orr r2, r2, r3, lsl #24 /* r2 = 4321 */
str r2, [r0, #0x01]
#endif
RET
LMEMCPY_8_PAD
/*
* 1101: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r3, [r1] /* r3 = ...0 */
ldrh r2, [r1, #0x01] /* BE:r2 = ..12 LE:r2 = ..21 */
ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */
ldrb r1, [r1, #0x07] /* r1 = ...7 */
strb r3, [r0]
mov r3, ip, lsr #16 /* BE:r3 = ..34 LE:r3 = ..65 */
#ifdef __ARMEB__
strh ip, [r0, #0x05]
orr r2, r3, r2, lsl #16 /* r2 = 1234 */
#else
strh r3, [r0, #0x05]
orr r2, r2, ip, lsl #16 /* r2 = 4321 */
#endif
str r2, [r0, #0x01]
strb r1, [r0, #0x07]
RET
LMEMCPY_8_PAD
/*
* 1110: dst is 8-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */
#ifdef __ARMEB__
mov ip, r2, lsr #8 /* ip = ...0 */
strb ip, [r0]
mov ip, r2, lsl #24 /* ip = 1... */
orr ip, ip, r3, lsr #8 /* ip = 1234 */
strb r1, [r0, #0x07]
mov r1, r1, lsr #8 /* r1 = ...6 */
orr r1, r1, r3, lsl #8 /* r1 = 3456 */
#else
strb r2, [r0]
mov ip, r2, lsr #8 /* ip = ...1 */
orr ip, ip, r3, lsl #8 /* ip = 4321 */
mov r2, r1, lsr #8 /* r2 = ...7 */
strb r2, [r0, #0x07]
mov r1, r1, lsl #8 /* r1 = .76. */
orr r1, r1, r3, lsr #24 /* r1 = .765 */
#endif
str ip, [r0, #0x01]
strh r1, [r0, #0x05]
RET
LMEMCPY_8_PAD
/*
* 1111: dst is 8-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1]
ldr ip, [r1, #0x01]
ldrh r3, [r1, #0x05]
ldrb r1, [r1, #0x07]
strb r2, [r0]
str ip, [r0, #0x01]
strh r3, [r0, #0x05]
strb r1, [r0, #0x07]
RET
LMEMCPY_8_PAD
/******************************************************************************
* Special case for 12 byte copies
*/
#define LMEMCPY_C_LOG2 7 /* 128 bytes */
#define LMEMCPY_C_PAD .align LMEMCPY_C_LOG2
LMEMCPY_C_PAD
.Lmemcpy_c:
and r2, r1, #0x03
orr r2, r2, r0, lsl #2
ands r2, r2, #0x0f
sub r3, pc, #0x14
addne pc, r3, r2, lsl #LMEMCPY_C_LOG2
/*
* 0000: dst is 32-bit aligned, src is 32-bit aligned
*/
ldr r2, [r1]
ldr r3, [r1, #0x04]
ldr r1, [r1, #0x08]
str r2, [r0]
str r3, [r0, #0x04]
str r1, [r0, #0x08]
RET
LMEMCPY_C_PAD
/*
* 0001: dst is 32-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1, #0xb] /* r2 = ...B */
ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */
ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */
ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */
#ifdef __ARMEB__
orr r2, r2, ip, lsl #8 /* r2 = 89AB */
str r2, [r0, #0x08]
mov r2, ip, lsr #24 /* r2 = ...7 */
orr r2, r2, r3, lsl #8 /* r2 = 4567 */
mov r1, r1, lsl #8 /* r1 = 012. */
orr r1, r1, r3, lsr #24 /* r1 = 0123 */
#else
mov r2, r2, lsl #24 /* r2 = B... */
orr r2, r2, ip, lsr #8 /* r2 = BA98 */
str r2, [r0, #0x08]
mov r2, ip, lsl #24 /* r2 = 7... */
orr r2, r2, r3, lsr #8 /* r2 = 7654 */
mov r1, r1, lsr #8 /* r1 = .210 */
orr r1, r1, r3, lsl #24 /* r1 = 3210 */
#endif
str r2, [r0, #0x04]
str r1, [r0]
RET
LMEMCPY_C_PAD
/*
* 0010: dst is 32-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */
ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */
#ifdef __ARMEB__
mov r2, r2, lsl #16 /* r2 = 01.. */
orr r2, r2, r3, lsr #16 /* r2 = 0123 */
str r2, [r0]
mov r3, r3, lsl #16 /* r3 = 45.. */
orr r3, r3, ip, lsr #16 /* r3 = 4567 */
orr r1, r1, ip, lsl #16 /* r1 = 89AB */
#else
orr r2, r2, r3, lsl #16 /* r2 = 3210 */
str r2, [r0]
mov r3, r3, lsr #16 /* r3 = ..54 */
orr r3, r3, ip, lsl #16 /* r3 = 7654 */
mov r1, r1, lsl #16 /* r1 = BA.. */
orr r1, r1, ip, lsr #16 /* r1 = BA98 */
#endif
str r3, [r0, #0x04]
str r1, [r0, #0x08]
RET
LMEMCPY_C_PAD
/*
* 0011: dst is 32-bit aligned, src is 8-bit aligned
*/
ldrb r2, [r1] /* r2 = ...0 */
ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */
ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */
ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */
#ifdef __ARMEB__
mov r2, r2, lsl #24 /* r2 = 0... */
orr r2, r2, r3, lsr #8 /* r2 = 0123 */
str r2, [r0]
mov r3, r3, lsl #24 /* r3 = 4... */
orr r3, r3, ip, lsr #8 /* r3 = 4567 */
mov r1, r1, lsr #8 /* r1 = .9AB */
orr r1, r1, ip, lsl #24 /* r1 = 89AB */
#else
orr r2, r2, r3, lsl #8 /* r2 = 3210 */
str r2, [r0]
mov r3, r3, lsr #24 /* r3 = ...4 */
orr r3, r3, ip, lsl #8 /* r3 = 7654 */
mov r1, r1, lsl #8 /* r1 = BA9. */
orr r1, r1, ip, lsr #24 /* r1 = BA98 */
#endif
str r3, [r0, #0x04]
str r1, [r0, #0x08]
RET
LMEMCPY_C_PAD
/*
* 0100: dst is 8-bit aligned (byte 1), src is 32-bit aligned
*/
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */
ldr ip, [r1, #0x08] /* BE:ip = 89AB LE:ip = BA98 */
mov r1, r2, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */
strh r1, [r0, #0x01]
#ifdef __ARMEB__
mov r1, r2, lsr #24 /* r1 = ...0 */
strb r1, [r0]
mov r1, r2, lsl #24 /* r1 = 3... */
orr r2, r1, r3, lsr #8 /* r1 = 3456 */
mov r1, r3, lsl #24 /* r1 = 7... */
orr r1, r1, ip, lsr #8 /* r1 = 789A */
#else
strb r2, [r0]
mov r1, r2, lsr #24 /* r1 = ...3 */
orr r2, r1, r3, lsl #8 /* r1 = 6543 */
mov r1, r3, lsr #24 /* r1 = ...7 */
orr r1, r1, ip, lsl #8 /* r1 = A987 */
mov ip, ip, lsr #24 /* ip = ...B */
#endif
str r2, [r0, #0x03]
str r1, [r0, #0x07]
strb ip, [r0, #0x0b]
RET
LMEMCPY_C_PAD
/*
* 0101: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 1)
*/
ldrb r2, [r1]
ldrh r3, [r1, #0x01]
ldr ip, [r1, #0x03]
strb r2, [r0]
ldr r2, [r1, #0x07]
ldrb r1, [r1, #0x0b]
strh r3, [r0, #0x01]
str ip, [r0, #0x03]
str r2, [r0, #0x07]
strb r1, [r0, #0x0b]
RET
LMEMCPY_C_PAD
/*
* 0110: dst is 8-bit aligned (byte 1), src is 16-bit aligned
*/
ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */
ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */
ldr ip, [r1, #0x06] /* BE:ip = 6789 LE:ip = 9876 */
ldrh r1, [r1, #0x0a] /* BE:r1 = ..AB LE:r1 = ..BA */
#ifdef __ARMEB__
mov r2, r2, ror #8 /* r2 = 1..0 */
strb r2, [r0]
mov r2, r2, lsr #16 /* r2 = ..1. */
orr r2, r2, r3, lsr #24 /* r2 = ..12 */
strh r2, [r0, #0x01]
mov r2, r3, lsl #8 /* r2 = 345. */
orr r3, r2, ip, lsr #24 /* r3 = 3456 */
mov r2, ip, lsl #8 /* r2 = 789. */
orr r2, r2, r1, lsr #8 /* r2 = 789A */
#else
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = ...1 */
orr r2, r2, r3, lsl #8 /* r2 = 4321 */
strh r2, [r0, #0x01]
mov r2, r3, lsr #8 /* r2 = .543 */
orr r3, r2, ip, lsl #24 /* r3 = 6543 */
mov r2, ip, lsr #8 /* r2 = .987 */
orr r2, r2, r1, lsl #24 /* r2 = A987 */
mov r1, r1, lsr #8 /* r1 = ...B */
#endif
str r3, [r0, #0x03]
str r2, [r0, #0x07]
strb r1, [r0, #0x0b]
RET
LMEMCPY_C_PAD
/*
* 0111: dst is 8-bit aligned (byte 1), src is 8-bit aligned (byte 3)
*/
ldrb r2, [r1]
ldr r3, [r1, #0x01] /* BE:r3 = 1234 LE:r3 = 4321 */
ldr ip, [r1, #0x05] /* BE:ip = 5678 LE:ip = 8765 */
ldr r1, [r1, #0x09] /* BE:r1 = 9ABx LE:r1 = xBA9 */
strb r2, [r0]
#ifdef __ARMEB__
mov r2, r3, lsr #16 /* r2 = ..12 */
strh r2, [r0, #0x01]
mov r3, r3, lsl #16 /* r3 = 34.. */
orr r3, r3, ip, lsr #16 /* r3 = 3456 */
mov ip, ip, lsl #16 /* ip = 78.. */
orr ip, ip, r1, lsr #16 /* ip = 789A */
mov r1, r1, lsr #8 /* r1 = .9AB */
#else
strh r3, [r0, #0x01]
mov r3, r3, lsr #16 /* r3 = ..43 */
orr r3, r3, ip, lsl #16 /* r3 = 6543 */
mov ip, ip, lsr #16 /* ip = ..87 */
orr ip, ip, r1, lsl #16 /* ip = A987 */
mov r1, r1, lsr #16 /* r1 = ..xB */
#endif
str r3, [r0, #0x03]
str ip, [r0, #0x07]
strb r1, [r0, #0x0b]
RET
LMEMCPY_C_PAD
/*
* 1000: dst is 16-bit aligned, src is 32-bit aligned
*/
ldr ip, [r1] /* BE:ip = 0123 LE:ip = 3210 */
ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */
ldr r2, [r1, #0x08] /* BE:r2 = 89AB LE:r2 = BA98 */
mov r1, ip, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */
#ifdef __ARMEB__
strh r1, [r0]
mov r1, ip, lsl #16 /* r1 = 23.. */
orr r1, r1, r3, lsr #16 /* r1 = 2345 */
mov r3, r3, lsl #16 /* r3 = 67.. */
orr r3, r3, r2, lsr #16 /* r3 = 6789 */
#else
strh ip, [r0]
orr r1, r1, r3, lsl #16 /* r1 = 5432 */
mov r3, r3, lsr #16 /* r3 = ..76 */
orr r3, r3, r2, lsl #16 /* r3 = 9876 */
mov r2, r2, lsr #16 /* r2 = ..BA */
#endif
str r1, [r0, #0x02]
str r3, [r0, #0x06]
strh r2, [r0, #0x0a]
RET
LMEMCPY_C_PAD
/*
* 1001: dst is 16-bit aligned, src is 8-bit aligned (byte 1)
*/
ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */
ldr r3, [r1, #0x03] /* BE:r3 = 3456 LE:r3 = 6543 */
mov ip, r2, lsr #8 /* BE:ip = .x01 LE:ip = .210 */
strh ip, [r0]
ldr ip, [r1, #0x07] /* BE:ip = 789A LE:ip = A987 */
ldrb r1, [r1, #0x0b] /* r1 = ...B */
#ifdef __ARMEB__
mov r2, r2, lsl #24 /* r2 = 2... */
orr r2, r2, r3, lsr #8 /* r2 = 2345 */
mov r3, r3, lsl #24 /* r3 = 6... */
orr r3, r3, ip, lsr #8 /* r3 = 6789 */
orr r1, r1, ip, lsl #8 /* r1 = 89AB */
#else
mov r2, r2, lsr #24 /* r2 = ...2 */
orr r2, r2, r3, lsl #8 /* r2 = 5432 */
mov r3, r3, lsr #24 /* r3 = ...6 */
orr r3, r3, ip, lsl #8 /* r3 = 9876 */
mov r1, r1, lsl #8 /* r1 = ..B. */
orr r1, r1, ip, lsr #24 /* r1 = ..BA */
#endif
str r2, [r0, #0x02]
str r3, [r0, #0x06]
strh r1, [r0, #0x0a]
RET
LMEMCPY_C_PAD
/*
* 1010: dst is 16-bit aligned, src is 16-bit aligned
*/
ldrh r2, [r1]
ldr r3, [r1, #0x02]
ldr ip, [r1, #0x06]
ldrh r1, [r1, #0x0a]
strh r2, [r0]
str r3, [r0, #0x02]
str ip, [r0, #0x06]
strh r1, [r0, #0x0a]
RET
LMEMCPY_C_PAD
/*
* 1011: dst is 16-bit aligned, src is 8-bit aligned (byte 3)
*/
ldr r2, [r1, #0x09] /* BE:r2 = 9ABx LE:r2 = xBA9 */
ldr r3, [r1, #0x05] /* BE:r3 = 5678 LE:r3 = 8765 */
mov ip, r2, lsr #8 /* BE:ip = .9AB LE:ip = .xBA */
strh ip, [r0, #0x0a]
ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */
ldrb r1, [r1] /* r1 = ...0 */
#ifdef __ARMEB__
mov r2, r2, lsr #24 /* r2 = ...9 */
orr r2, r2, r3, lsl #8 /* r2 = 6789 */
mov r3, r3, lsr #24 /* r3 = ...5 */
orr r3, r3, ip, lsl #8 /* r3 = 2345 */
mov r1, r1, lsl #8 /* r1 = ..0. */
orr r1, r1, ip, lsr #24 /* r1 = ..01 */
#else
mov r2, r2, lsl #24 /* r2 = 9... */
orr r2, r2, r3, lsr #8 /* r2 = 9876 */
mov r3, r3, lsl #24 /* r3 = 5... */
orr r3, r3, ip, lsr #8 /* r3 = 5432 */
orr r1, r1, ip, lsl #8 /* r1 = 3210 */
#endif
str r2, [r0, #0x06]
str r3, [r0, #0x02]
strh r1, [r0]
RET
LMEMCPY_C_PAD
/*
* 1100: dst is 8-bit aligned (byte 3), src is 32-bit aligned
*/
ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */
ldr ip, [r1, #0x04] /* BE:ip = 4567 LE:ip = 7654 */
ldr r1, [r1, #0x08] /* BE:r1 = 89AB LE:r1 = BA98 */
#ifdef __ARMEB__
mov r3, r2, lsr #24 /* r3 = ...0 */
strb r3, [r0]
mov r2, r2, lsl #8 /* r2 = 123. */
orr r2, r2, ip, lsr #24 /* r2 = 1234 */
str r2, [r0, #0x01]
mov r2, ip, lsl #8 /* r2 = 567. */
orr r2, r2, r1, lsr #24 /* r2 = 5678 */
str r2, [r0, #0x05]
mov r2, r1, lsr #8 /* r2 = ..9A */
strh r2, [r0, #0x09]
strb r1, [r0, #0x0b]
#else
strb r2, [r0]
mov r3, r2, lsr #8 /* r3 = .321 */
orr r3, r3, ip, lsl #24 /* r3 = 4321 */
str r3, [r0, #0x01]
mov r3, ip, lsr #8 /* r3 = .765 */
orr r3, r3, r1, lsl #24 /* r3 = 8765 */
str r3, [r0, #0x05]
mov r1, r1, lsr #8 /* r1 = .BA9 */
strh r1, [r0, #0x09]
mov r1, r1, lsr #16 /* r1 = ...B */
strb r1, [r0, #0x0b]
#endif
RET
LMEMCPY_C_PAD
/*
* 1101: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 1)
*/
ldrb r2, [r1, #0x0b] /* r2 = ...B */
ldr r3, [r1, #0x07] /* BE:r3 = 789A LE:r3 = A987 */
ldr ip, [r1, #0x03] /* BE:ip = 3456 LE:ip = 6543 */
ldr r1, [r1, #-1] /* BE:r1 = x012 LE:r1 = 210x */
strb r2, [r0, #0x0b]
#ifdef __ARMEB__
strh r3, [r0, #0x09]
mov r3, r3, lsr #16 /* r3 = ..78 */
orr r3, r3, ip, lsl #16 /* r3 = 5678 */
mov ip, ip, lsr #16 /* ip = ..34 */
orr ip, ip, r1, lsl #16 /* ip = 1234 */
mov r1, r1, lsr #16 /* r1 = ..x0 */
#else
mov r2, r3, lsr #16 /* r2 = ..A9 */
strh r2, [r0, #0x09]
mov r3, r3, lsl #16 /* r3 = 87.. */
orr r3, r3, ip, lsr #16 /* r3 = 8765 */
mov ip, ip, lsl #16 /* ip = 43.. */
orr ip, ip, r1, lsr #16 /* ip = 4321 */
mov r1, r1, lsr #8 /* r1 = .210 */
#endif
str r3, [r0, #0x05]
str ip, [r0, #0x01]
strb r1, [r0]
RET
LMEMCPY_C_PAD
/*
* 1110: dst is 8-bit aligned (byte 3), src is 16-bit aligned
*/
#ifdef __ARMEB__
ldrh r2, [r1, #0x0a] /* r2 = ..AB */
ldr ip, [r1, #0x06] /* ip = 6789 */
ldr r3, [r1, #0x02] /* r3 = 2345 */
ldrh r1, [r1] /* r1 = ..01 */
strb r2, [r0, #0x0b]
mov r2, r2, lsr #8 /* r2 = ...A */
orr r2, r2, ip, lsl #8 /* r2 = 789A */
mov ip, ip, lsr #8 /* ip = .678 */
orr ip, ip, r3, lsl #24 /* ip = 5678 */
mov r3, r3, lsr #8 /* r3 = .234 */
orr r3, r3, r1, lsl #24 /* r3 = 1234 */
mov r1, r1, lsr #8 /* r1 = ...0 */
strb r1, [r0]
str r3, [r0, #0x01]
str ip, [r0, #0x05]
strh r2, [r0, #0x09]
#else
ldrh r2, [r1] /* r2 = ..10 */
ldr r3, [r1, #0x02] /* r3 = 5432 */
ldr ip, [r1, #0x06] /* ip = 9876 */
ldrh r1, [r1, #0x0a] /* r1 = ..BA */
strb r2, [r0]
mov r2, r2, lsr #8 /* r2 = ...1 */
orr r2, r2, r3, lsl #8 /* r2 = 4321 */
mov r3, r3, lsr #24 /* r3 = ...5 */
orr r3, r3, ip, lsl #8 /* r3 = 8765 */
mov ip, ip, lsr #24 /* ip = ...9 */
orr ip, ip, r1, lsl #8 /* ip = .BA9 */
mov r1, r1, lsr #8 /* r1 = ...B */
str r2, [r0, #0x01]
str r3, [r0, #0x05]
strh ip, [r0, #0x09]
strb r1, [r0, #0x0b]
#endif
RET
LMEMCPY_C_PAD
/*
* 1111: dst is 8-bit aligned (byte 3), src is 8-bit aligned (byte 3)
*/
ldrb r2, [r1]
ldr r3, [r1, #0x01]
ldr ip, [r1, #0x05]
strb r2, [r0]
ldrh r2, [r1, #0x09]
ldrb r1, [r1, #0x0b]
str r3, [r0, #0x01]
str ip, [r0, #0x05]
strh r2, [r0, #0x09]
strb r1, [r0, #0x0b]
RET
#endif /* _ARM_ARCH_5E */
#ifdef GPROF
ENTRY(user)
nop
ENTRY(btrap)
nop
ENTRY(etrap)
nop
ENTRY(bintr)
nop
ENTRY(eintr)
nop
#endif