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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
| commit | cf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch) | |
| tree | 757a3d280760c654767631cab5ad8af2d86d1848 /arch/alpha/lib/memchr.S | |
| download | linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip | |
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij:
"Core changes:
- Use the non-blocking mux_state_try_select() in the generic MUX pin
control back-end
- Free pin maps on pinctrl_generic_to_map() failure in the core
helpers
New hardware pin control:
- Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
(this is for the low power audio, LPASS = Low Power Audio SubSystem
portions)
- Upboard support on top of the Intel pin controller
- Apple T6030 and T6031 support (just compatible strings)
- Samsung Exynos 8855 SoC
- Mediatek MT6858 SoC
- Rockchip RK3308B and RV1106 SoCs
- Airoha EN7523 and AN7563 SoCs
Improvements:
- Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable
- Qualcomm improvements on top of the Qualcomm PDC (power domain
controller) irqchip improvements from tglx:s tree
- Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups
- The NPCM8xx driver has been put into shape fixing many pin and
group definitions
- Some non-urgent Tegra 264 pin assignments are fixed up
- Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
pin assignments, missing features etc"
* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
pinctrl: meson: sync some modify from A4
pinctrl: meson: a4: Add input enable pin configuration
pinctrl: realtek: rtd1625: remove unused group name spdif_sel
pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
Revert "Merge branch 'ib-rsk7204' into devel"
pinctrl: rockchip: Add RV1106 pinctrl support
dt-bindings: pinctrl: rockchip: Add RV1106 compatible
pinctrl: rockchip: Decode drive strength in the get function
pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
pinctrl: airoha: add support of an7563 SoC
dt-bindings: pinctrl: airoha: add support of an7563 pin controller
pinctrl: airoha: try to find chip scu node by phandle first
pinctrl: airoha: add support of en7523 SoC
dt-bindings: pinctrl: airoha: add support of en7523 pin controller
pinctrl: airoha: an7583: add support for olt pinmux
pinctrl: airoha: an7583: add support for pon_alt pinmux
pinctrl: airoha: an7583: add support for npu_uart pinmux
dt-bindings: pinctrl: airoha: an7583: add missed features
...
Diffstat (limited to 'arch/alpha/lib/memchr.S')
| -rw-r--r-- | arch/alpha/lib/memchr.S | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/arch/alpha/lib/memchr.S b/arch/alpha/lib/memchr.S new file mode 100644 index 000000000..45366e32f --- /dev/null +++ b/arch/alpha/lib/memchr.S @@ -0,0 +1,165 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Mosberger (davidm@cs.arizona.edu). + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Finds characters in a memory area. Optimized for the Alpha: + + - memory accessed as aligned quadwords only + - uses cmpbge to compare 8 bytes in parallel + - does binary search to find 0 byte in last + quadword (HAKMEM needed 12 instructions to + do this instead of the 9 instructions that + binary search needs). + +For correctness consider that: + + - only minimum number of quadwords may be accessed + - the third argument is an unsigned long +*/ +#include <linux/export.h> + .set noreorder + .set noat + + .globl memchr + .ent memchr +memchr: + .frame $30,0,$26,0 + .prologue 0 + + # Hack -- if someone passes in (size_t)-1, hoping to just + # search til the end of the address space, we will overflow + # below when we find the address of the last byte. Given + # that we will never have a 56-bit address space, cropping + # the length is the easiest way to avoid trouble. + zap $18, 0x80, $5 #-e0 : + + beq $18, $not_found # .. e1 : + ldq_u $1, 0($16) # e1 : load first quadword + insbl $17, 1, $2 # .. e0 : $2 = 000000000000ch00 + and $17, 0xff, $17 #-e0 : $17 = 00000000000000ch + cmpult $18, 9, $4 # .. e1 : + or $2, $17, $17 # e0 : $17 = 000000000000chch + lda $3, -1($31) # .. e1 : + sll $17, 16, $2 #-e0 : $2 = 00000000chch0000 + addq $16, $5, $5 # .. e1 : + or $2, $17, $17 # e1 : $17 = 00000000chchchch + unop # : + sll $17, 32, $2 #-e0 : $2 = chchchch00000000 + or $2, $17, $17 # e1 : $17 = chchchchchchchch + extql $1, $16, $7 # e0 : + beq $4, $first_quad # .. e1 : + + ldq_u $6, -1($5) #-e1 : eight or less bytes to search + extqh $6, $16, $6 # .. e0 : + mov $16, $0 # e0 : + or $7, $6, $1 # .. e1 : $1 = quadword starting at $16 + + # Deal with the case where at most 8 bytes remain to be searched + # in $1. E.g.: + # $18 = 6 + # $1 = ????c6c5c4c3c2c1 +$last_quad: + negq $18, $6 #-e0 : + xor $17, $1, $1 # .. e1 : + srl $3, $6, $6 # e0 : $6 = mask of $18 bits set + cmpbge $31, $1, $2 # .. e1 : + and $2, $6, $2 #-e0 : + beq $2, $not_found # .. e1 : + +$found_it: + # Now, determine which byte matched: + negq $2, $3 # e0 : + and $2, $3, $2 # e1 : + + and $2, 0x0f, $1 #-e0 : + addq $0, 4, $3 # .. e1 : + cmoveq $1, $3, $0 # e0 : + + addq $0, 2, $3 # .. e1 : + and $2, 0x33, $1 #-e0 : + cmoveq $1, $3, $0 # .. e1 : + + and $2, 0x55, $1 # e0 : + addq $0, 1, $3 # .. e1 : + cmoveq $1, $3, $0 #-e0 : + +$done: ret # .. e1 : + + # Deal with the case where $18 > 8 bytes remain to be + # searched. $16 may not be aligned. + .align 4 +$first_quad: + andnot $16, 0x7, $0 #-e1 : + insqh $3, $16, $2 # .. e0 : $2 = 0000ffffffffffff ($16<0:2> ff) + xor $1, $17, $1 # e0 : + or $1, $2, $1 # e1 : $1 = ====ffffffffffff + cmpbge $31, $1, $2 #-e0 : + bne $2, $found_it # .. e1 : + + # At least one byte left to process. + + ldq $1, 8($0) # e0 : + subq $5, 1, $18 # .. e1 : + addq $0, 8, $0 #-e0 : + + # Make $18 point to last quad to be accessed (the + # last quad may or may not be partial). + + andnot $18, 0x7, $18 # .. e1 : + cmpult $0, $18, $2 # e0 : + beq $2, $final # .. e1 : + + # At least two quads remain to be accessed. + + subq $18, $0, $4 #-e0 : $4 <- nr quads to be processed + and $4, 8, $4 # e1 : odd number of quads? + bne $4, $odd_quad_count # e1 : + + # At least three quads remain to be accessed + + mov $1, $4 # e0 : move prefetched value to correct reg + + .align 4 +$unrolled_loop: + ldq $1, 8($0) #-e0 : prefetch $1 + xor $17, $4, $2 # .. e1 : + cmpbge $31, $2, $2 # e0 : + bne $2, $found_it # .. e1 : + + addq $0, 8, $0 #-e0 : +$odd_quad_count: + xor $17, $1, $2 # .. e1 : + ldq $4, 8($0) # e0 : prefetch $4 + cmpbge $31, $2, $2 # .. e1 : + addq $0, 8, $6 #-e0 : + bne $2, $found_it # .. e1 : + + cmpult $6, $18, $6 # e0 : + addq $0, 8, $0 # .. e1 : + bne $6, $unrolled_loop #-e1 : + + mov $4, $1 # e0 : move prefetched value into $1 +$final: subq $5, $0, $18 # .. e1 : $18 <- number of bytes left to do + bne $18, $last_quad # e1 : + +$not_found: + mov $31, $0 #-e0 : + ret # .. e1 : + + .end memchr + EXPORT_SYMBOL(memchr) |
