mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
c4945b9ed4
As a preparation for providing little-endian bitops for all architectures, This renames generic implementation of little-endian bitops. (remove "generic_" prefix and postfix "_le") s/generic_find_next_le_bit/find_next_bit_le/ s/generic_find_next_zero_le_bit/find_next_zero_bit_le/ s/generic_find_first_zero_le_bit/find_first_zero_bit_le/ s/generic___test_and_set_le_bit/__test_and_set_bit_le/ s/generic___test_and_clear_le_bit/__test_and_clear_bit_le/ s/generic_test_le_bit/test_bit_le/ s/generic___set_le_bit/__set_bit_le/ s/generic___clear_le_bit/__clear_bit_le/ s/generic_test_and_set_le_bit/test_and_set_bit_le/ s/generic_test_and_clear_le_bit/test_and_clear_bit_le/ Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
186 lines
3.2 KiB
ArmAsm
186 lines
3.2 KiB
ArmAsm
/*
|
|
* Copyright (C) 2006 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/linkage.h>
|
|
|
|
.text
|
|
/*
|
|
* unsigned long find_first_zero_bit(const unsigned long *addr,
|
|
* unsigned long size)
|
|
*/
|
|
ENTRY(find_first_zero_bit)
|
|
cp.w r11, 0
|
|
reteq r11
|
|
mov r9, r11
|
|
1: ld.w r8, r12[0]
|
|
com r8
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|
|
|
|
/*
|
|
* unsigned long find_next_zero_bit(const unsigned long *addr,
|
|
* unsigned long size,
|
|
* unsigned long offset)
|
|
*/
|
|
ENTRY(find_next_zero_bit)
|
|
lsr r8, r10, 5
|
|
sub r9, r11, r10
|
|
retle r11
|
|
|
|
lsl r8, 2
|
|
add r12, r8
|
|
andl r10, 31, COH
|
|
breq 1f
|
|
|
|
/* offset is not word-aligned. Handle the first (32 - r10) bits */
|
|
ld.w r8, r12[0]
|
|
com r8
|
|
sub r12, -4
|
|
lsr r8, r8, r10
|
|
brne .L_found
|
|
|
|
/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
|
|
add r9, r10
|
|
sub r9, 32
|
|
retle r11
|
|
|
|
/* Main loop. offset must be word-aligned */
|
|
1: ld.w r8, r12[0]
|
|
com r8
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|
|
|
|
/* Common return path for when a bit is actually found. */
|
|
.L_found:
|
|
brev r8
|
|
clz r10, r8
|
|
rsub r9, r11
|
|
add r10, r9
|
|
|
|
/* XXX: If we don't have to return exactly "size" when the bit
|
|
is not found, we may drop this "min" thing */
|
|
min r12, r11, r10
|
|
retal r12
|
|
|
|
/*
|
|
* unsigned long find_first_bit(const unsigned long *addr,
|
|
* unsigned long size)
|
|
*/
|
|
ENTRY(find_first_bit)
|
|
cp.w r11, 0
|
|
reteq r11
|
|
mov r9, r11
|
|
1: ld.w r8, r12[0]
|
|
cp.w r8, 0
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|
|
|
|
/*
|
|
* unsigned long find_next_bit(const unsigned long *addr,
|
|
* unsigned long size,
|
|
* unsigned long offset)
|
|
*/
|
|
ENTRY(find_next_bit)
|
|
lsr r8, r10, 5
|
|
sub r9, r11, r10
|
|
retle r11
|
|
|
|
lsl r8, 2
|
|
add r12, r8
|
|
andl r10, 31, COH
|
|
breq 1f
|
|
|
|
/* offset is not word-aligned. Handle the first (32 - r10) bits */
|
|
ld.w r8, r12[0]
|
|
sub r12, -4
|
|
lsr r8, r8, r10
|
|
brne .L_found
|
|
|
|
/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
|
|
add r9, r10
|
|
sub r9, 32
|
|
retle r11
|
|
|
|
/* Main loop. offset must be word-aligned */
|
|
1: ld.w r8, r12[0]
|
|
cp.w r8, 0
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|
|
|
|
ENTRY(find_next_bit_le)
|
|
lsr r8, r10, 5
|
|
sub r9, r11, r10
|
|
retle r11
|
|
|
|
lsl r8, 2
|
|
add r12, r8
|
|
andl r10, 31, COH
|
|
breq 1f
|
|
|
|
/* offset is not word-aligned. Handle the first (32 - r10) bits */
|
|
ldswp.w r8, r12[0]
|
|
sub r12, -4
|
|
lsr r8, r8, r10
|
|
brne .L_found
|
|
|
|
/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
|
|
add r9, r10
|
|
sub r9, 32
|
|
retle r11
|
|
|
|
/* Main loop. offset must be word-aligned */
|
|
1: ldswp.w r8, r12[0]
|
|
cp.w r8, 0
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|
|
|
|
ENTRY(find_next_zero_bit_le)
|
|
lsr r8, r10, 5
|
|
sub r9, r11, r10
|
|
retle r11
|
|
|
|
lsl r8, 2
|
|
add r12, r8
|
|
andl r10, 31, COH
|
|
breq 1f
|
|
|
|
/* offset is not word-aligned. Handle the first (32 - r10) bits */
|
|
ldswp.w r8, r12[0]
|
|
sub r12, -4
|
|
com r8
|
|
lsr r8, r8, r10
|
|
brne .L_found
|
|
|
|
/* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
|
|
add r9, r10
|
|
sub r9, 32
|
|
retle r11
|
|
|
|
/* Main loop. offset must be word-aligned */
|
|
1: ldswp.w r8, r12[0]
|
|
com r8
|
|
brne .L_found
|
|
sub r12, -4
|
|
sub r9, 32
|
|
brgt 1b
|
|
retal r11
|