https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 1a695a905c18548062509178b98bc91e67510864 authored by Linus Torvalds on 29 May 2016, 16:29:24 UTC
Linux 4.7-rc1
Linux 4.7-rc1
Tip revision: 1a695a9
ghash-ce-core.S
/*
* Accelerated GHASH implementation with ARMv8 vmull.p64 instructions.
*
* Copyright (C) 2015 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
* 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>
#include <asm/assembler.h>
SHASH .req q0
SHASH2 .req q1
T1 .req q2
T2 .req q3
MASK .req q4
XL .req q5
XM .req q6
XH .req q7
IN1 .req q7
SHASH_L .req d0
SHASH_H .req d1
SHASH2_L .req d2
T1_L .req d4
MASK_L .req d8
XL_L .req d10
XL_H .req d11
XM_L .req d12
XM_H .req d13
XH_L .req d14
.text
.fpu crypto-neon-fp-armv8
/*
* void pmull_ghash_update(int blocks, u64 dg[], const char *src,
* struct ghash_key const *k, const char *head)
*/
ENTRY(pmull_ghash_update)
vld1.64 {SHASH}, [r3]
vld1.64 {XL}, [r1]
vmov.i8 MASK, #0xe1
vext.8 SHASH2, SHASH, SHASH, #8
vshl.u64 MASK, MASK, #57
veor SHASH2, SHASH2, SHASH
/* do the head block first, if supplied */
ldr ip, [sp]
teq ip, #0
beq 0f
vld1.64 {T1}, [ip]
teq r0, #0
b 1f
0: vld1.64 {T1}, [r2]!
subs r0, r0, #1
1: /* multiply XL by SHASH in GF(2^128) */
#ifndef CONFIG_CPU_BIG_ENDIAN
vrev64.8 T1, T1
#endif
vext.8 T2, XL, XL, #8
vext.8 IN1, T1, T1, #8
veor T1, T1, T2
veor XL, XL, IN1
vmull.p64 XH, SHASH_H, XL_H @ a1 * b1
veor T1, T1, XL
vmull.p64 XL, SHASH_L, XL_L @ a0 * b0
vmull.p64 XM, SHASH2_L, T1_L @ (a1 + a0)(b1 + b0)
vext.8 T1, XL, XH, #8
veor T2, XL, XH
veor XM, XM, T1
veor XM, XM, T2
vmull.p64 T2, XL_L, MASK_L
vmov XH_L, XM_H
vmov XM_H, XL_L
veor XL, XM, T2
vext.8 T2, XL, XL, #8
vmull.p64 XL, XL_L, MASK_L
veor T2, T2, XH
veor XL, XL, T2
bne 0b
vst1.64 {XL}, [r1]
bx lr
ENDPROC(pmull_ghash_update)