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Subject[PATCH net-next v6 05/23] zinc: import Andy Polyakov's ChaCha20 ARM and ARM64 implementations
Date
These NEON and non-NEON implementations come from Andy Polyakov's
implementation, and are included here in raw form without modification,
so that subsequent commits that fix these up for the kernel can see how
it has changed. This awkward commit splitting has been requested for the
ARM[64] implementations in particular.

While this is CRYPTOGAMS code, the originating code for this happens to
be the same as OpenSSL's commit 87cc649f30aaf69b351701875b9dac07c29ce8a2

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Based-on-code-from: Andy Polyakov <appro@openssl.org>
Cc: Samuel Neves <sneves@dei.uc.pt>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>
Cc: Andy Polyakov <appro@openssl.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
lib/zinc/chacha20/chacha20-arm-cryptogams.S | 1440 ++++++++++++
lib/zinc/chacha20/chacha20-arm64-cryptogams.S | 1973 +++++++++++++++++
2 files changed, 3413 insertions(+)
create mode 100644 lib/zinc/chacha20/chacha20-arm-cryptogams.S
create mode 100644 lib/zinc/chacha20/chacha20-arm64-cryptogams.S

diff --git a/lib/zinc/chacha20/chacha20-arm-cryptogams.S b/lib/zinc/chacha20/chacha20-arm-cryptogams.S
new file mode 100644
index 000000000000..05a3a9e6e93f
--- /dev/null
+++ b/lib/zinc/chacha20/chacha20-arm-cryptogams.S
@@ -0,0 +1,1440 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2006-2017 CRYPTOGAMS by <appro@openssl.org>. All Rights Reserved.
+ */
+
+#include "arm_arch.h"
+
+.text
+#if defined(__thumb2__) || defined(__clang__)
+.syntax unified
+#endif
+#if defined(__thumb2__)
+.thumb
+#else
+.code 32
+#endif
+
+#if defined(__thumb2__) || defined(__clang__)
+#define ldrhsb ldrbhs
+#endif
+
+.align 5
+.Lsigma:
+.long 0x61707865,0x3320646e,0x79622d32,0x6b206574 @ endian-neutral
+.Lone:
+.long 1,0,0,0
+.Lrot8:
+.long 0x02010003,0x06050407
+#if __ARM_MAX_ARCH__>=7
+.LOPENSSL_armcap:
+.word OPENSSL_armcap_P-.LChaCha20_ctr32
+#else
+.word -1
+#endif
+
+.globl ChaCha20_ctr32
+.type ChaCha20_ctr32,%function
+.align 5
+ChaCha20_ctr32:
+.LChaCha20_ctr32:
+ ldr r12,[sp,#0] @ pull pointer to counter and nonce
+ stmdb sp!,{r0-r2,r4-r11,lr}
+#if __ARM_ARCH__<7 && !defined(__thumb2__)
+ sub r14,pc,#16 @ ChaCha20_ctr32
+#else
+ adr r14,.LChaCha20_ctr32
+#endif
+ cmp r2,#0 @ len==0?
+#ifdef __thumb2__
+ itt eq
+#endif
+ addeq sp,sp,#4*3
+ beq .Lno_data
+#if __ARM_MAX_ARCH__>=7
+ cmp r2,#192 @ test len
+ bls .Lshort
+ ldr r4,[r14,#-24]
+ ldr r4,[r14,r4]
+# ifdef __APPLE__
+ ldr r4,[r4]
+# endif
+ tst r4,#ARMV7_NEON
+ bne .LChaCha20_neon
+.Lshort:
+#endif
+ ldmia r12,{r4-r7} @ load counter and nonce
+ sub sp,sp,#4*(16) @ off-load area
+ sub r14,r14,#64 @ .Lsigma
+ stmdb sp!,{r4-r7} @ copy counter and nonce
+ ldmia r3,{r4-r11} @ load key
+ ldmia r14,{r0-r3} @ load sigma
+ stmdb sp!,{r4-r11} @ copy key
+ stmdb sp!,{r0-r3} @ copy sigma
+ str r10,[sp,#4*(16+10)] @ off-load "rx"
+ str r11,[sp,#4*(16+11)] @ off-load "rx"
+ b .Loop_outer_enter
+
+.align 4
+.Loop_outer:
+ ldmia sp,{r0-r9} @ load key material
+ str r11,[sp,#4*(32+2)] @ save len
+ str r12, [sp,#4*(32+1)] @ save inp
+ str r14, [sp,#4*(32+0)] @ save out
+.Loop_outer_enter:
+ ldr r11, [sp,#4*(15)]
+ mov r4,r4,ror#19 @ twist b[0..3]
+ ldr r12,[sp,#4*(12)] @ modulo-scheduled load
+ mov r5,r5,ror#19
+ ldr r10, [sp,#4*(13)]
+ mov r6,r6,ror#19
+ ldr r14,[sp,#4*(14)]
+ mov r7,r7,ror#19
+ mov r11,r11,ror#8 @ twist d[0..3]
+ mov r12,r12,ror#8
+ mov r10,r10,ror#8
+ mov r14,r14,ror#8
+ str r11, [sp,#4*(16+15)]
+ mov r11,#10
+ b .Loop
+
+.align 4
+.Loop:
+ subs r11,r11,#1
+ add r0,r0,r4,ror#13
+ add r1,r1,r5,ror#13
+ eor r12,r0,r12,ror#24
+ eor r10,r1,r10,ror#24
+ add r8,r8,r12,ror#16
+ add r9,r9,r10,ror#16
+ eor r4,r8,r4,ror#13
+ eor r5,r9,r5,ror#13
+ add r0,r0,r4,ror#20
+ add r1,r1,r5,ror#20
+ eor r12,r0,r12,ror#16
+ eor r10,r1,r10,ror#16
+ add r8,r8,r12,ror#24
+ str r10,[sp,#4*(16+13)]
+ add r9,r9,r10,ror#24
+ ldr r10,[sp,#4*(16+15)]
+ str r8,[sp,#4*(16+8)]
+ eor r4,r4,r8,ror#12
+ str r9,[sp,#4*(16+9)]
+ eor r5,r5,r9,ror#12
+ ldr r8,[sp,#4*(16+10)]
+ add r2,r2,r6,ror#13
+ ldr r9,[sp,#4*(16+11)]
+ add r3,r3,r7,ror#13
+ eor r14,r2,r14,ror#24
+ eor r10,r3,r10,ror#24
+ add r8,r8,r14,ror#16
+ add r9,r9,r10,ror#16
+ eor r6,r8,r6,ror#13
+ eor r7,r9,r7,ror#13
+ add r2,r2,r6,ror#20
+ add r3,r3,r7,ror#20
+ eor r14,r2,r14,ror#16
+ eor r10,r3,r10,ror#16
+ add r8,r8,r14,ror#24
+ add r9,r9,r10,ror#24
+ eor r6,r6,r8,ror#12
+ eor r7,r7,r9,ror#12
+ add r0,r0,r5,ror#13
+ add r1,r1,r6,ror#13
+ eor r10,r0,r10,ror#24
+ eor r12,r1,r12,ror#24
+ add r8,r8,r10,ror#16
+ add r9,r9,r12,ror#16
+ eor r5,r8,r5,ror#13
+ eor r6,r9,r6,ror#13
+ add r0,r0,r5,ror#20
+ add r1,r1,r6,ror#20
+ eor r10,r0,r10,ror#16
+ eor r12,r1,r12,ror#16
+ str r10,[sp,#4*(16+15)]
+ add r8,r8,r10,ror#24
+ ldr r10,[sp,#4*(16+13)]
+ add r9,r9,r12,ror#24
+ str r8,[sp,#4*(16+10)]
+ eor r5,r5,r8,ror#12
+ str r9,[sp,#4*(16+11)]
+ eor r6,r6,r9,ror#12
+ ldr r8,[sp,#4*(16+8)]
+ add r2,r2,r7,ror#13
+ ldr r9,[sp,#4*(16+9)]
+ add r3,r3,r4,ror#13
+ eor r10,r2,r10,ror#24
+ eor r14,r3,r14,ror#24
+ add r8,r8,r10,ror#16
+ add r9,r9,r14,ror#16
+ eor r7,r8,r7,ror#13
+ eor r4,r9,r4,ror#13
+ add r2,r2,r7,ror#20
+ add r3,r3,r4,ror#20
+ eor r10,r2,r10,ror#16
+ eor r14,r3,r14,ror#16
+ add r8,r8,r10,ror#24
+ add r9,r9,r14,ror#24
+ eor r7,r7,r8,ror#12
+ eor r4,r4,r9,ror#12
+ bne .Loop
+
+ ldr r11,[sp,#4*(32+2)] @ load len
+
+ str r8, [sp,#4*(16+8)] @ modulo-scheduled store
+ str r9, [sp,#4*(16+9)]
+ str r12,[sp,#4*(16+12)]
+ str r10, [sp,#4*(16+13)]
+ str r14,[sp,#4*(16+14)]
+
+ @ at this point we have first half of 512-bit result in
+ @ rx and second half at sp+4*(16+8)
+
+ cmp r11,#64 @ done yet?
+#ifdef __thumb2__
+ itete lo
+#endif
+ addlo r12,sp,#4*(0) @ shortcut or ...
+ ldrhs r12,[sp,#4*(32+1)] @ ... load inp
+ addlo r14,sp,#4*(0) @ shortcut or ...
+ ldrhs r14,[sp,#4*(32+0)] @ ... load out
+
+ ldr r8,[sp,#4*(0)] @ load key material
+ ldr r9,[sp,#4*(1)]
+
+#if __ARM_ARCH__>=6 || !defined(__ARMEB__)
+# if __ARM_ARCH__<7
+ orr r10,r12,r14
+ tst r10,#3 @ are input and output aligned?
+ ldr r10,[sp,#4*(2)]
+ bne .Lunaligned
+ cmp r11,#64 @ restore flags
+# else
+ ldr r10,[sp,#4*(2)]
+# endif
+ ldr r11,[sp,#4*(3)]
+
+ add r0,r0,r8 @ accumulate key material
+ add r1,r1,r9
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r8,[r12],#16 @ load input
+ ldrhs r9,[r12,#-12]
+
+ add r2,r2,r10
+ add r3,r3,r11
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r10,[r12,#-8]
+ ldrhs r11,[r12,#-4]
+# if __ARM_ARCH__>=6 && defined(__ARMEB__)
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+# endif
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r0,r0,r8 @ xor with input
+ eorhs r1,r1,r9
+ add r8,sp,#4*(4)
+ str r0,[r14],#16 @ store output
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r2,r2,r10
+ eorhs r3,r3,r11
+ ldmia r8,{r8-r11} @ load key material
+ str r1,[r14,#-12]
+ str r2,[r14,#-8]
+ str r3,[r14,#-4]
+
+ add r4,r8,r4,ror#13 @ accumulate key material
+ add r5,r9,r5,ror#13
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r8,[r12],#16 @ load input
+ ldrhs r9,[r12,#-12]
+ add r6,r10,r6,ror#13
+ add r7,r11,r7,ror#13
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r10,[r12,#-8]
+ ldrhs r11,[r12,#-4]
+# if __ARM_ARCH__>=6 && defined(__ARMEB__)
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r4,r4,r8
+ eorhs r5,r5,r9
+ add r8,sp,#4*(8)
+ str r4,[r14],#16 @ store output
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r6,r6,r10
+ eorhs r7,r7,r11
+ str r5,[r14,#-12]
+ ldmia r8,{r8-r11} @ load key material
+ str r6,[r14,#-8]
+ add r0,sp,#4*(16+8)
+ str r7,[r14,#-4]
+
+ ldmia r0,{r0-r7} @ load second half
+
+ add r0,r0,r8 @ accumulate key material
+ add r1,r1,r9
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r8,[r12],#16 @ load input
+ ldrhs r9,[r12,#-12]
+# ifdef __thumb2__
+ itt hi
+# endif
+ strhi r10,[sp,#4*(16+10)] @ copy "rx" while at it
+ strhi r11,[sp,#4*(16+11)] @ copy "rx" while at it
+ add r2,r2,r10
+ add r3,r3,r11
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r10,[r12,#-8]
+ ldrhs r11,[r12,#-4]
+# if __ARM_ARCH__>=6 && defined(__ARMEB__)
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+# endif
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r0,r0,r8
+ eorhs r1,r1,r9
+ add r8,sp,#4*(12)
+ str r0,[r14],#16 @ store output
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r2,r2,r10
+ eorhs r3,r3,r11
+ str r1,[r14,#-12]
+ ldmia r8,{r8-r11} @ load key material
+ str r2,[r14,#-8]
+ str r3,[r14,#-4]
+
+ add r4,r8,r4,ror#24 @ accumulate key material
+ add r5,r9,r5,ror#24
+# ifdef __thumb2__
+ itt hi
+# endif
+ addhi r8,r8,#1 @ next counter value
+ strhi r8,[sp,#4*(12)] @ save next counter value
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r8,[r12],#16 @ load input
+ ldrhs r9,[r12,#-12]
+ add r6,r10,r6,ror#24
+ add r7,r11,r7,ror#24
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhs r10,[r12,#-8]
+ ldrhs r11,[r12,#-4]
+# if __ARM_ARCH__>=6 && defined(__ARMEB__)
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r4,r4,r8
+ eorhs r5,r5,r9
+# ifdef __thumb2__
+ it ne
+# endif
+ ldrne r8,[sp,#4*(32+2)] @ re-load len
+# ifdef __thumb2__
+ itt hs
+# endif
+ eorhs r6,r6,r10
+ eorhs r7,r7,r11
+ str r4,[r14],#16 @ store output
+ str r5,[r14,#-12]
+# ifdef __thumb2__
+ it hs
+# endif
+ subhs r11,r8,#64 @ len-=64
+ str r6,[r14,#-8]
+ str r7,[r14,#-4]
+ bhi .Loop_outer
+
+ beq .Ldone
+# if __ARM_ARCH__<7
+ b .Ltail
+
+.align 4
+.Lunaligned: @ unaligned endian-neutral path
+ cmp r11,#64 @ restore flags
+# endif
+#endif
+#if __ARM_ARCH__<7
+ ldr r11,[sp,#4*(3)]
+ add r0,r8,r0 @ accumulate key material
+ add r1,r9,r1
+ add r2,r10,r2
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r8,r8,r8 @ zero or ...
+ ldrhsb r8,[r12],#16 @ ... load input
+ eorlo r9,r9,r9
+ ldrhsb r9,[r12,#-12]
+
+ add r3,r11,r3
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r10,r10,r10
+ ldrhsb r10,[r12,#-8]
+ eorlo r11,r11,r11
+ ldrhsb r11,[r12,#-4]
+
+ eor r0,r8,r0 @ xor with input (or zero)
+ eor r1,r9,r1
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-15] @ load more input
+ ldrhsb r9,[r12,#-11]
+ eor r2,r10,r2
+ strb r0,[r14],#16 @ store output
+ eor r3,r11,r3
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-7]
+ ldrhsb r11,[r12,#-3]
+ strb r1,[r14,#-12]
+ eor r0,r8,r0,lsr#8
+ strb r2,[r14,#-8]
+ eor r1,r9,r1,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-14] @ load more input
+ ldrhsb r9,[r12,#-10]
+ strb r3,[r14,#-4]
+ eor r2,r10,r2,lsr#8
+ strb r0,[r14,#-15]
+ eor r3,r11,r3,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-6]
+ ldrhsb r11,[r12,#-2]
+ strb r1,[r14,#-11]
+ eor r0,r8,r0,lsr#8
+ strb r2,[r14,#-7]
+ eor r1,r9,r1,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-13] @ load more input
+ ldrhsb r9,[r12,#-9]
+ strb r3,[r14,#-3]
+ eor r2,r10,r2,lsr#8
+ strb r0,[r14,#-14]
+ eor r3,r11,r3,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-5]
+ ldrhsb r11,[r12,#-1]
+ strb r1,[r14,#-10]
+ strb r2,[r14,#-6]
+ eor r0,r8,r0,lsr#8
+ strb r3,[r14,#-2]
+ eor r1,r9,r1,lsr#8
+ strb r0,[r14,#-13]
+ eor r2,r10,r2,lsr#8
+ strb r1,[r14,#-9]
+ eor r3,r11,r3,lsr#8
+ strb r2,[r14,#-5]
+ strb r3,[r14,#-1]
+ add r8,sp,#4*(4+0)
+ ldmia r8,{r8-r11} @ load key material
+ add r0,sp,#4*(16+8)
+ add r4,r8,r4,ror#13 @ accumulate key material
+ add r5,r9,r5,ror#13
+ add r6,r10,r6,ror#13
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r8,r8,r8 @ zero or ...
+ ldrhsb r8,[r12],#16 @ ... load input
+ eorlo r9,r9,r9
+ ldrhsb r9,[r12,#-12]
+
+ add r7,r11,r7,ror#13
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r10,r10,r10
+ ldrhsb r10,[r12,#-8]
+ eorlo r11,r11,r11
+ ldrhsb r11,[r12,#-4]
+
+ eor r4,r8,r4 @ xor with input (or zero)
+ eor r5,r9,r5
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-15] @ load more input
+ ldrhsb r9,[r12,#-11]
+ eor r6,r10,r6
+ strb r4,[r14],#16 @ store output
+ eor r7,r11,r7
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-7]
+ ldrhsb r11,[r12,#-3]
+ strb r5,[r14,#-12]
+ eor r4,r8,r4,lsr#8
+ strb r6,[r14,#-8]
+ eor r5,r9,r5,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-14] @ load more input
+ ldrhsb r9,[r12,#-10]
+ strb r7,[r14,#-4]
+ eor r6,r10,r6,lsr#8
+ strb r4,[r14,#-15]
+ eor r7,r11,r7,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-6]
+ ldrhsb r11,[r12,#-2]
+ strb r5,[r14,#-11]
+ eor r4,r8,r4,lsr#8
+ strb r6,[r14,#-7]
+ eor r5,r9,r5,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-13] @ load more input
+ ldrhsb r9,[r12,#-9]
+ strb r7,[r14,#-3]
+ eor r6,r10,r6,lsr#8
+ strb r4,[r14,#-14]
+ eor r7,r11,r7,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-5]
+ ldrhsb r11,[r12,#-1]
+ strb r5,[r14,#-10]
+ strb r6,[r14,#-6]
+ eor r4,r8,r4,lsr#8
+ strb r7,[r14,#-2]
+ eor r5,r9,r5,lsr#8
+ strb r4,[r14,#-13]
+ eor r6,r10,r6,lsr#8
+ strb r5,[r14,#-9]
+ eor r7,r11,r7,lsr#8
+ strb r6,[r14,#-5]
+ strb r7,[r14,#-1]
+ add r8,sp,#4*(4+4)
+ ldmia r8,{r8-r11} @ load key material
+ ldmia r0,{r0-r7} @ load second half
+# ifdef __thumb2__
+ itt hi
+# endif
+ strhi r10,[sp,#4*(16+10)] @ copy "rx"
+ strhi r11,[sp,#4*(16+11)] @ copy "rx"
+ add r0,r8,r0 @ accumulate key material
+ add r1,r9,r1
+ add r2,r10,r2
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r8,r8,r8 @ zero or ...
+ ldrhsb r8,[r12],#16 @ ... load input
+ eorlo r9,r9,r9
+ ldrhsb r9,[r12,#-12]
+
+ add r3,r11,r3
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r10,r10,r10
+ ldrhsb r10,[r12,#-8]
+ eorlo r11,r11,r11
+ ldrhsb r11,[r12,#-4]
+
+ eor r0,r8,r0 @ xor with input (or zero)
+ eor r1,r9,r1
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-15] @ load more input
+ ldrhsb r9,[r12,#-11]
+ eor r2,r10,r2
+ strb r0,[r14],#16 @ store output
+ eor r3,r11,r3
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-7]
+ ldrhsb r11,[r12,#-3]
+ strb r1,[r14,#-12]
+ eor r0,r8,r0,lsr#8
+ strb r2,[r14,#-8]
+ eor r1,r9,r1,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-14] @ load more input
+ ldrhsb r9,[r12,#-10]
+ strb r3,[r14,#-4]
+ eor r2,r10,r2,lsr#8
+ strb r0,[r14,#-15]
+ eor r3,r11,r3,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-6]
+ ldrhsb r11,[r12,#-2]
+ strb r1,[r14,#-11]
+ eor r0,r8,r0,lsr#8
+ strb r2,[r14,#-7]
+ eor r1,r9,r1,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-13] @ load more input
+ ldrhsb r9,[r12,#-9]
+ strb r3,[r14,#-3]
+ eor r2,r10,r2,lsr#8
+ strb r0,[r14,#-14]
+ eor r3,r11,r3,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-5]
+ ldrhsb r11,[r12,#-1]
+ strb r1,[r14,#-10]
+ strb r2,[r14,#-6]
+ eor r0,r8,r0,lsr#8
+ strb r3,[r14,#-2]
+ eor r1,r9,r1,lsr#8
+ strb r0,[r14,#-13]
+ eor r2,r10,r2,lsr#8
+ strb r1,[r14,#-9]
+ eor r3,r11,r3,lsr#8
+ strb r2,[r14,#-5]
+ strb r3,[r14,#-1]
+ add r8,sp,#4*(4+8)
+ ldmia r8,{r8-r11} @ load key material
+ add r4,r8,r4,ror#24 @ accumulate key material
+# ifdef __thumb2__
+ itt hi
+# endif
+ addhi r8,r8,#1 @ next counter value
+ strhi r8,[sp,#4*(12)] @ save next counter value
+ add r5,r9,r5,ror#24
+ add r6,r10,r6,ror#24
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r8,r8,r8 @ zero or ...
+ ldrhsb r8,[r12],#16 @ ... load input
+ eorlo r9,r9,r9
+ ldrhsb r9,[r12,#-12]
+
+ add r7,r11,r7,ror#24
+# ifdef __thumb2__
+ itete lo
+# endif
+ eorlo r10,r10,r10
+ ldrhsb r10,[r12,#-8]
+ eorlo r11,r11,r11
+ ldrhsb r11,[r12,#-4]
+
+ eor r4,r8,r4 @ xor with input (or zero)
+ eor r5,r9,r5
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-15] @ load more input
+ ldrhsb r9,[r12,#-11]
+ eor r6,r10,r6
+ strb r4,[r14],#16 @ store output
+ eor r7,r11,r7
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-7]
+ ldrhsb r11,[r12,#-3]
+ strb r5,[r14,#-12]
+ eor r4,r8,r4,lsr#8
+ strb r6,[r14,#-8]
+ eor r5,r9,r5,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-14] @ load more input
+ ldrhsb r9,[r12,#-10]
+ strb r7,[r14,#-4]
+ eor r6,r10,r6,lsr#8
+ strb r4,[r14,#-15]
+ eor r7,r11,r7,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-6]
+ ldrhsb r11,[r12,#-2]
+ strb r5,[r14,#-11]
+ eor r4,r8,r4,lsr#8
+ strb r6,[r14,#-7]
+ eor r5,r9,r5,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r8,[r12,#-13] @ load more input
+ ldrhsb r9,[r12,#-9]
+ strb r7,[r14,#-3]
+ eor r6,r10,r6,lsr#8
+ strb r4,[r14,#-14]
+ eor r7,r11,r7,lsr#8
+# ifdef __thumb2__
+ itt hs
+# endif
+ ldrhsb r10,[r12,#-5]
+ ldrhsb r11,[r12,#-1]
+ strb r5,[r14,#-10]
+ strb r6,[r14,#-6]
+ eor r4,r8,r4,lsr#8
+ strb r7,[r14,#-2]
+ eor r5,r9,r5,lsr#8
+ strb r4,[r14,#-13]
+ eor r6,r10,r6,lsr#8
+ strb r5,[r14,#-9]
+ eor r7,r11,r7,lsr#8
+ strb r6,[r14,#-5]
+ strb r7,[r14,#-1]
+# ifdef __thumb2__
+ it ne
+# endif
+ ldrne r8,[sp,#4*(32+2)] @ re-load len
+# ifdef __thumb2__
+ it hs
+# endif
+ subhs r11,r8,#64 @ len-=64
+ bhi .Loop_outer
+
+ beq .Ldone
+#endif
+
+.Ltail:
+ ldr r12,[sp,#4*(32+1)] @ load inp
+ add r9,sp,#4*(0)
+ ldr r14,[sp,#4*(32+0)] @ load out
+
+.Loop_tail:
+ ldrb r10,[r9],#1 @ read buffer on stack
+ ldrb r11,[r12],#1 @ read input
+ subs r8,r8,#1
+ eor r11,r11,r10
+ strb r11,[r14],#1 @ store output
+ bne .Loop_tail
+
+.Ldone:
+ add sp,sp,#4*(32+3)
+.Lno_data:
+ ldmia sp!,{r4-r11,pc}
+.size ChaCha20_ctr32,.-ChaCha20_ctr32
+#if __ARM_MAX_ARCH__>=7
+.arch armv7-a
+.fpu neon
+
+.type ChaCha20_neon,%function
+.align 5
+ChaCha20_neon:
+ ldr r12,[sp,#0] @ pull pointer to counter and nonce
+ stmdb sp!,{r0-r2,r4-r11,lr}
+.LChaCha20_neon:
+ adr r14,.Lsigma
+ vstmdb sp!,{d8-d15} @ ABI spec says so
+ stmdb sp!,{r0-r3}
+
+ vld1.32 {q1-q2},[r3] @ load key
+ ldmia r3,{r4-r11} @ load key
+
+ sub sp,sp,#4*(16+16)
+ vld1.32 {q3},[r12] @ load counter and nonce
+ add r12,sp,#4*8
+ ldmia r14,{r0-r3} @ load sigma
+ vld1.32 {q0},[r14]! @ load sigma
+ vld1.32 {q12},[r14]! @ one
+ @ vld1.32 {d30},[r14] @ rot8
+ vst1.32 {q2-q3},[r12] @ copy 1/2key|counter|nonce
+ vst1.32 {q0-q1},[sp] @ copy sigma|1/2key
+
+ str r10,[sp,#4*(16+10)] @ off-load "rx"
+ str r11,[sp,#4*(16+11)] @ off-load "rx"
+ vshl.i32 d26,d24,#1 @ two
+ vstr d24,[sp,#4*(16+0)]
+ vshl.i32 d28,d24,#2 @ four
+ vstr d26,[sp,#4*(16+2)]
+ vmov q4,q0
+ vstr d28,[sp,#4*(16+4)]
+ vmov q8,q0
+ @ vstr d30,[sp,#4*(16+6)]
+ vmov q5,q1
+ vmov q9,q1
+ b .Loop_neon_enter
+
+.align 4
+.Loop_neon_outer:
+ ldmia sp,{r0-r9} @ load key material
+ cmp r11,#64*2 @ if len<=64*2
+ bls .Lbreak_neon @ switch to integer-only
+ @ vldr d30,[sp,#4*(16+6)] @ rot8
+ vmov q4,q0
+ str r11,[sp,#4*(32+2)] @ save len
+ vmov q8,q0
+ str r12, [sp,#4*(32+1)] @ save inp
+ vmov q5,q1
+ str r14, [sp,#4*(32+0)] @ save out
+ vmov q9,q1
+.Loop_neon_enter:
+ ldr r11, [sp,#4*(15)]
+ mov r4,r4,ror#19 @ twist b[0..3]
+ vadd.i32 q7,q3,q12 @ counter+1
+ ldr r12,[sp,#4*(12)] @ modulo-scheduled load
+ mov r5,r5,ror#19
+ vmov q6,q2
+ ldr r10, [sp,#4*(13)]
+ mov r6,r6,ror#19
+ vmov q10,q2
+ ldr r14,[sp,#4*(14)]
+ mov r7,r7,ror#19
+ vadd.i32 q11,q7,q12 @ counter+2
+ add r12,r12,#3 @ counter+3
+ mov r11,r11,ror#8 @ twist d[0..3]
+ mov r12,r12,ror#8
+ mov r10,r10,ror#8
+ mov r14,r14,ror#8
+ str r11, [sp,#4*(16+15)]
+ mov r11,#10
+ b .Loop_neon
+
+.align 4
+.Loop_neon:
+ subs r11,r11,#1
+ vadd.i32 q0,q0,q1
+ add r0,r0,r4,ror#13
+ vadd.i32 q4,q4,q5
+ add r1,r1,r5,ror#13
+ vadd.i32 q8,q8,q9
+ eor r12,r0,r12,ror#24
+ veor q3,q3,q0
+ eor r10,r1,r10,ror#24
+ veor q7,q7,q4
+ add r8,r8,r12,ror#16
+ veor q11,q11,q8
+ add r9,r9,r10,ror#16
+ vrev32.16 q3,q3
+ eor r4,r8,r4,ror#13
+ vrev32.16 q7,q7
+ eor r5,r9,r5,ror#13
+ vrev32.16 q11,q11
+ add r0,r0,r4,ror#20
+ vadd.i32 q2,q2,q3
+ add r1,r1,r5,ror#20
+ vadd.i32 q6,q6,q7
+ eor r12,r0,r12,ror#16
+ vadd.i32 q10,q10,q11
+ eor r10,r1,r10,ror#16
+ veor q12,q1,q2
+ add r8,r8,r12,ror#24
+ veor q13,q5,q6
+ str r10,[sp,#4*(16+13)]
+ veor q14,q9,q10
+ add r9,r9,r10,ror#24
+ vshr.u32 q1,q12,#20
+ ldr r10,[sp,#4*(16+15)]
+ vshr.u32 q5,q13,#20
+ str r8,[sp,#4*(16+8)]
+ vshr.u32 q9,q14,#20
+ eor r4,r4,r8,ror#12
+ vsli.32 q1,q12,#12
+ str r9,[sp,#4*(16+9)]
+ vsli.32 q5,q13,#12
+ eor r5,r5,r9,ror#12
+ vsli.32 q9,q14,#12
+ ldr r8,[sp,#4*(16+10)]
+ vadd.i32 q0,q0,q1
+ add r2,r2,r6,ror#13
+ vadd.i32 q4,q4,q5
+ ldr r9,[sp,#4*(16+11)]
+ vadd.i32 q8,q8,q9
+ add r3,r3,r7,ror#13
+ veor q12,q3,q0
+ eor r14,r2,r14,ror#24
+ veor q13,q7,q4
+ eor r10,r3,r10,ror#24
+ veor q14,q11,q8
+ add r8,r8,r14,ror#16
+ vshr.u32 q3,q12,#24
+ add r9,r9,r10,ror#16
+ vshr.u32 q7,q13,#24
+ eor r6,r8,r6,ror#13
+ vshr.u32 q11,q14,#24
+ eor r7,r9,r7,ror#13
+ vsli.32 q3,q12,#8
+ add r2,r2,r6,ror#20
+ vsli.32 q7,q13,#8
+ add r3,r3,r7,ror#20
+ vsli.32 q11,q14,#8
+ eor r14,r2,r14,ror#16
+ vadd.i32 q2,q2,q3
+ eor r10,r3,r10,ror#16
+ vadd.i32 q6,q6,q7
+ add r8,r8,r14,ror#24
+ vadd.i32 q10,q10,q11
+ add r9,r9,r10,ror#24
+ veor q12,q1,q2
+ eor r6,r6,r8,ror#12
+ veor q13,q5,q6
+ eor r7,r7,r9,ror#12
+ veor q14,q9,q10
+ vshr.u32 q1,q12,#25
+ vshr.u32 q5,q13,#25
+ vshr.u32 q9,q14,#25
+ vsli.32 q1,q12,#7
+ vsli.32 q5,q13,#7
+ vsli.32 q9,q14,#7
+ vext.8 q2,q2,q2,#8
+ vext.8 q6,q6,q6,#8
+ vext.8 q10,q10,q10,#8
+ vext.8 q1,q1,q1,#4
+ vext.8 q5,q5,q5,#4
+ vext.8 q9,q9,q9,#4
+ vext.8 q3,q3,q3,#12
+ vext.8 q7,q7,q7,#12
+ vext.8 q11,q11,q11,#12
+ vadd.i32 q0,q0,q1
+ add r0,r0,r5,ror#13
+ vadd.i32 q4,q4,q5
+ add r1,r1,r6,ror#13
+ vadd.i32 q8,q8,q9
+ eor r10,r0,r10,ror#24
+ veor q3,q3,q0
+ eor r12,r1,r12,ror#24
+ veor q7,q7,q4
+ add r8,r8,r10,ror#16
+ veor q11,q11,q8
+ add r9,r9,r12,ror#16
+ vrev32.16 q3,q3
+ eor r5,r8,r5,ror#13
+ vrev32.16 q7,q7
+ eor r6,r9,r6,ror#13
+ vrev32.16 q11,q11
+ add r0,r0,r5,ror#20
+ vadd.i32 q2,q2,q3
+ add r1,r1,r6,ror#20
+ vadd.i32 q6,q6,q7
+ eor r10,r0,r10,ror#16
+ vadd.i32 q10,q10,q11
+ eor r12,r1,r12,ror#16
+ veor q12,q1,q2
+ str r10,[sp,#4*(16+15)]
+ veor q13,q5,q6
+ add r8,r8,r10,ror#24
+ veor q14,q9,q10
+ ldr r10,[sp,#4*(16+13)]
+ vshr.u32 q1,q12,#20
+ add r9,r9,r12,ror#24
+ vshr.u32 q5,q13,#20
+ str r8,[sp,#4*(16+10)]
+ vshr.u32 q9,q14,#20
+ eor r5,r5,r8,ror#12
+ vsli.32 q1,q12,#12
+ str r9,[sp,#4*(16+11)]
+ vsli.32 q5,q13,#12
+ eor r6,r6,r9,ror#12
+ vsli.32 q9,q14,#12
+ ldr r8,[sp,#4*(16+8)]
+ vadd.i32 q0,q0,q1
+ add r2,r2,r7,ror#13
+ vadd.i32 q4,q4,q5
+ ldr r9,[sp,#4*(16+9)]
+ vadd.i32 q8,q8,q9
+ add r3,r3,r4,ror#13
+ veor q12,q3,q0
+ eor r10,r2,r10,ror#24
+ veor q13,q7,q4
+ eor r14,r3,r14,ror#24
+ veor q14,q11,q8
+ add r8,r8,r10,ror#16
+ vshr.u32 q3,q12,#24
+ add r9,r9,r14,ror#16
+ vshr.u32 q7,q13,#24
+ eor r7,r8,r7,ror#13
+ vshr.u32 q11,q14,#24
+ eor r4,r9,r4,ror#13
+ vsli.32 q3,q12,#8
+ add r2,r2,r7,ror#20
+ vsli.32 q7,q13,#8
+ add r3,r3,r4,ror#20
+ vsli.32 q11,q14,#8
+ eor r10,r2,r10,ror#16
+ vadd.i32 q2,q2,q3
+ eor r14,r3,r14,ror#16
+ vadd.i32 q6,q6,q7
+ add r8,r8,r10,ror#24
+ vadd.i32 q10,q10,q11
+ add r9,r9,r14,ror#24
+ veor q12,q1,q2
+ eor r7,r7,r8,ror#12
+ veor q13,q5,q6
+ eor r4,r4,r9,ror#12
+ veor q14,q9,q10
+ vshr.u32 q1,q12,#25
+ vshr.u32 q5,q13,#25
+ vshr.u32 q9,q14,#25
+ vsli.32 q1,q12,#7
+ vsli.32 q5,q13,#7
+ vsli.32 q9,q14,#7
+ vext.8 q2,q2,q2,#8
+ vext.8 q6,q6,q6,#8
+ vext.8 q10,q10,q10,#8
+ vext.8 q1,q1,q1,#12
+ vext.8 q5,q5,q5,#12
+ vext.8 q9,q9,q9,#12
+ vext.8 q3,q3,q3,#4
+ vext.8 q7,q7,q7,#4
+ vext.8 q11,q11,q11,#4
+ bne .Loop_neon
+
+ add r11,sp,#32
+ vld1.32 {q12-q13},[sp] @ load key material
+ vld1.32 {q14-q15},[r11]
+
+ ldr r11,[sp,#4*(32+2)] @ load len
+
+ str r8, [sp,#4*(16+8)] @ modulo-scheduled store
+ str r9, [sp,#4*(16+9)]
+ str r12,[sp,#4*(16+12)]
+ str r10, [sp,#4*(16+13)]
+ str r14,[sp,#4*(16+14)]
+
+ @ at this point we have first half of 512-bit result in
+ @ rx and second half at sp+4*(16+8)
+
+ ldr r12,[sp,#4*(32+1)] @ load inp
+ ldr r14,[sp,#4*(32+0)] @ load out
+
+ vadd.i32 q0,q0,q12 @ accumulate key material
+ vadd.i32 q4,q4,q12
+ vadd.i32 q8,q8,q12
+ vldr d24,[sp,#4*(16+0)] @ one
+
+ vadd.i32 q1,q1,q13
+ vadd.i32 q5,q5,q13
+ vadd.i32 q9,q9,q13
+ vldr d26,[sp,#4*(16+2)] @ two
+
+ vadd.i32 q2,q2,q14
+ vadd.i32 q6,q6,q14
+ vadd.i32 q10,q10,q14
+ vadd.i32 d14,d14,d24 @ counter+1
+ vadd.i32 d22,d22,d26 @ counter+2
+
+ vadd.i32 q3,q3,q15
+ vadd.i32 q7,q7,q15
+ vadd.i32 q11,q11,q15
+
+ cmp r11,#64*4
+ blo .Ltail_neon
+
+ vld1.8 {q12-q13},[r12]! @ load input
+ mov r11,sp
+ vld1.8 {q14-q15},[r12]!
+ veor q0,q0,q12 @ xor with input
+ veor q1,q1,q13
+ vld1.8 {q12-q13},[r12]!
+ veor q2,q2,q14
+ veor q3,q3,q15
+ vld1.8 {q14-q15},[r12]!
+
+ veor q4,q4,q12
+ vst1.8 {q0-q1},[r14]! @ store output
+ veor q5,q5,q13
+ vld1.8 {q12-q13},[r12]!
+ veor q6,q6,q14
+ vst1.8 {q2-q3},[r14]!
+ veor q7,q7,q15
+ vld1.8 {q14-q15},[r12]!
+
+ veor q8,q8,q12
+ vld1.32 {q0-q1},[r11]! @ load for next iteration
+ veor d25,d25,d25
+ vldr d24,[sp,#4*(16+4)] @ four
+ veor q9,q9,q13
+ vld1.32 {q2-q3},[r11]
+ veor q10,q10,q14
+ vst1.8 {q4-q5},[r14]!
+ veor q11,q11,q15
+ vst1.8 {q6-q7},[r14]!
+
+ vadd.i32 d6,d6,d24 @ next counter value
+ vldr d24,[sp,#4*(16+0)] @ one
+
+ ldmia sp,{r8-r11} @ load key material
+ add r0,r0,r8 @ accumulate key material
+ ldr r8,[r12],#16 @ load input
+ vst1.8 {q8-q9},[r14]!
+ add r1,r1,r9
+ ldr r9,[r12,#-12]
+ vst1.8 {q10-q11},[r14]!
+ add r2,r2,r10
+ ldr r10,[r12,#-8]
+ add r3,r3,r11
+ ldr r11,[r12,#-4]
+# ifdef __ARMEB__
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+# endif
+ eor r0,r0,r8 @ xor with input
+ add r8,sp,#4*(4)
+ eor r1,r1,r9
+ str r0,[r14],#16 @ store output
+ eor r2,r2,r10
+ str r1,[r14,#-12]
+ eor r3,r3,r11
+ ldmia r8,{r8-r11} @ load key material
+ str r2,[r14,#-8]
+ str r3,[r14,#-4]
+
+ add r4,r8,r4,ror#13 @ accumulate key material
+ ldr r8,[r12],#16 @ load input
+ add r5,r9,r5,ror#13
+ ldr r9,[r12,#-12]
+ add r6,r10,r6,ror#13
+ ldr r10,[r12,#-8]
+ add r7,r11,r7,ror#13
+ ldr r11,[r12,#-4]
+# ifdef __ARMEB__
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+ eor r4,r4,r8
+ add r8,sp,#4*(8)
+ eor r5,r5,r9
+ str r4,[r14],#16 @ store output
+ eor r6,r6,r10
+ str r5,[r14,#-12]
+ eor r7,r7,r11
+ ldmia r8,{r8-r11} @ load key material
+ str r6,[r14,#-8]
+ add r0,sp,#4*(16+8)
+ str r7,[r14,#-4]
+
+ ldmia r0,{r0-r7} @ load second half
+
+ add r0,r0,r8 @ accumulate key material
+ ldr r8,[r12],#16 @ load input
+ add r1,r1,r9
+ ldr r9,[r12,#-12]
+# ifdef __thumb2__
+ it hi
+# endif
+ strhi r10,[sp,#4*(16+10)] @ copy "rx" while at it
+ add r2,r2,r10
+ ldr r10,[r12,#-8]
+# ifdef __thumb2__
+ it hi
+# endif
+ strhi r11,[sp,#4*(16+11)] @ copy "rx" while at it
+ add r3,r3,r11
+ ldr r11,[r12,#-4]
+# ifdef __ARMEB__
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+# endif
+ eor r0,r0,r8
+ add r8,sp,#4*(12)
+ eor r1,r1,r9
+ str r0,[r14],#16 @ store output
+ eor r2,r2,r10
+ str r1,[r14,#-12]
+ eor r3,r3,r11
+ ldmia r8,{r8-r11} @ load key material
+ str r2,[r14,#-8]
+ str r3,[r14,#-4]
+
+ add r4,r8,r4,ror#24 @ accumulate key material
+ add r8,r8,#4 @ next counter value
+ add r5,r9,r5,ror#24
+ str r8,[sp,#4*(12)] @ save next counter value
+ ldr r8,[r12],#16 @ load input
+ add r6,r10,r6,ror#24
+ add r4,r4,#3 @ counter+3
+ ldr r9,[r12,#-12]
+ add r7,r11,r7,ror#24
+ ldr r10,[r12,#-8]
+ ldr r11,[r12,#-4]
+# ifdef __ARMEB__
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+ eor r4,r4,r8
+# ifdef __thumb2__
+ it hi
+# endif
+ ldrhi r8,[sp,#4*(32+2)] @ re-load len
+ eor r5,r5,r9
+ eor r6,r6,r10
+ str r4,[r14],#16 @ store output
+ eor r7,r7,r11
+ str r5,[r14,#-12]
+ sub r11,r8,#64*4 @ len-=64*4
+ str r6,[r14,#-8]
+ str r7,[r14,#-4]
+ bhi .Loop_neon_outer
+
+ b .Ldone_neon
+
+.align 4
+.Lbreak_neon:
+ @ harmonize NEON and integer-only stack frames: load data
+ @ from NEON frame, but save to integer-only one; distance
+ @ between the two is 4*(32+4+16-32)=4*(20).
+
+ str r11, [sp,#4*(20+32+2)] @ save len
+ add r11,sp,#4*(32+4)
+ str r12, [sp,#4*(20+32+1)] @ save inp
+ str r14, [sp,#4*(20+32+0)] @ save out
+
+ ldr r12,[sp,#4*(16+10)]
+ ldr r14,[sp,#4*(16+11)]
+ vldmia r11,{d8-d15} @ fulfill ABI requirement
+ str r12,[sp,#4*(20+16+10)] @ copy "rx"
+ str r14,[sp,#4*(20+16+11)] @ copy "rx"
+
+ ldr r11, [sp,#4*(15)]
+ mov r4,r4,ror#19 @ twist b[0..3]
+ ldr r12,[sp,#4*(12)] @ modulo-scheduled load
+ mov r5,r5,ror#19
+ ldr r10, [sp,#4*(13)]
+ mov r6,r6,ror#19
+ ldr r14,[sp,#4*(14)]
+ mov r7,r7,ror#19
+ mov r11,r11,ror#8 @ twist d[0..3]
+ mov r12,r12,ror#8
+ mov r10,r10,ror#8
+ mov r14,r14,ror#8
+ str r11, [sp,#4*(20+16+15)]
+ add r11,sp,#4*(20)
+ vst1.32 {q0-q1},[r11]! @ copy key
+ add sp,sp,#4*(20) @ switch frame
+ vst1.32 {q2-q3},[r11]
+ mov r11,#10
+ b .Loop @ go integer-only
+
+.align 4
+.Ltail_neon:
+ cmp r11,#64*3
+ bhs .L192_or_more_neon
+ cmp r11,#64*2
+ bhs .L128_or_more_neon
+ cmp r11,#64*1
+ bhs .L64_or_more_neon
+
+ add r8,sp,#4*(8)
+ vst1.8 {q0-q1},[sp]
+ add r10,sp,#4*(0)
+ vst1.8 {q2-q3},[r8]
+ b .Loop_tail_neon
+
+.align 4
+.L64_or_more_neon:
+ vld1.8 {q12-q13},[r12]!
+ vld1.8 {q14-q15},[r12]!
+ veor q0,q0,q12
+ veor q1,q1,q13
+ veor q2,q2,q14
+ veor q3,q3,q15
+ vst1.8 {q0-q1},[r14]!
+ vst1.8 {q2-q3},[r14]!
+
+ beq .Ldone_neon
+
+ add r8,sp,#4*(8)
+ vst1.8 {q4-q5},[sp]
+ add r10,sp,#4*(0)
+ vst1.8 {q6-q7},[r8]
+ sub r11,r11,#64*1 @ len-=64*1
+ b .Loop_tail_neon
+
+.align 4
+.L128_or_more_neon:
+ vld1.8 {q12-q13},[r12]!
+ vld1.8 {q14-q15},[r12]!
+ veor q0,q0,q12
+ veor q1,q1,q13
+ vld1.8 {q12-q13},[r12]!
+ veor q2,q2,q14
+ veor q3,q3,q15
+ vld1.8 {q14-q15},[r12]!
+
+ veor q4,q4,q12
+ veor q5,q5,q13
+ vst1.8 {q0-q1},[r14]!
+ veor q6,q6,q14
+ vst1.8 {q2-q3},[r14]!
+ veor q7,q7,q15
+ vst1.8 {q4-q5},[r14]!
+ vst1.8 {q6-q7},[r14]!
+
+ beq .Ldone_neon
+
+ add r8,sp,#4*(8)
+ vst1.8 {q8-q9},[sp]
+ add r10,sp,#4*(0)
+ vst1.8 {q10-q11},[r8]
+ sub r11,r11,#64*2 @ len-=64*2
+ b .Loop_tail_neon
+
+.align 4
+.L192_or_more_neon:
+ vld1.8 {q12-q13},[r12]!
+ vld1.8 {q14-q15},[r12]!
+ veor q0,q0,q12
+ veor q1,q1,q13
+ vld1.8 {q12-q13},[r12]!
+ veor q2,q2,q14
+ veor q3,q3,q15
+ vld1.8 {q14-q15},[r12]!
+
+ veor q4,q4,q12
+ veor q5,q5,q13
+ vld1.8 {q12-q13},[r12]!
+ veor q6,q6,q14
+ vst1.8 {q0-q1},[r14]!
+ veor q7,q7,q15
+ vld1.8 {q14-q15},[r12]!
+
+ veor q8,q8,q12
+ vst1.8 {q2-q3},[r14]!
+ veor q9,q9,q13
+ vst1.8 {q4-q5},[r14]!
+ veor q10,q10,q14
+ vst1.8 {q6-q7},[r14]!
+ veor q11,q11,q15
+ vst1.8 {q8-q9},[r14]!
+ vst1.8 {q10-q11},[r14]!
+
+ beq .Ldone_neon
+
+ ldmia sp,{r8-r11} @ load key material
+ add r0,r0,r8 @ accumulate key material
+ add r8,sp,#4*(4)
+ add r1,r1,r9
+ add r2,r2,r10
+ add r3,r3,r11
+ ldmia r8,{r8-r11} @ load key material
+
+ add r4,r8,r4,ror#13 @ accumulate key material
+ add r8,sp,#4*(8)
+ add r5,r9,r5,ror#13
+ add r6,r10,r6,ror#13
+ add r7,r11,r7,ror#13
+ ldmia r8,{r8-r11} @ load key material
+# ifdef __ARMEB__
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+ stmia sp,{r0-r7}
+ add r0,sp,#4*(16+8)
+
+ ldmia r0,{r0-r7} @ load second half
+
+ add r0,r0,r8 @ accumulate key material
+ add r8,sp,#4*(12)
+ add r1,r1,r9
+ add r2,r2,r10
+ add r3,r3,r11
+ ldmia r8,{r8-r11} @ load key material
+
+ add r4,r8,r4,ror#24 @ accumulate key material
+ add r8,sp,#4*(8)
+ add r5,r9,r5,ror#24
+ add r4,r4,#3 @ counter+3
+ add r6,r10,r6,ror#24
+ add r7,r11,r7,ror#24
+ ldr r11,[sp,#4*(32+2)] @ re-load len
+# ifdef __ARMEB__
+ rev r0,r0
+ rev r1,r1
+ rev r2,r2
+ rev r3,r3
+ rev r4,r4
+ rev r5,r5
+ rev r6,r6
+ rev r7,r7
+# endif
+ stmia r8,{r0-r7}
+ add r10,sp,#4*(0)
+ sub r11,r11,#64*3 @ len-=64*3
+
+.Loop_tail_neon:
+ ldrb r8,[r10],#1 @ read buffer on stack
+ ldrb r9,[r12],#1 @ read input
+ subs r11,r11,#1
+ eor r8,r8,r9
+ strb r8,[r14],#1 @ store output
+ bne .Loop_tail_neon
+
+.Ldone_neon:
+ add sp,sp,#4*(32+4)
+ vldmia sp,{d8-d15}
+ add sp,sp,#4*(16+3)
+ ldmia sp!,{r4-r11,pc}
+.size ChaCha20_neon,.-ChaCha20_neon
+.comm OPENSSL_armcap_P,4,4
+#endif
diff --git a/lib/zinc/chacha20/chacha20-arm64-cryptogams.S b/lib/zinc/chacha20/chacha20-arm64-cryptogams.S
new file mode 100644
index 000000000000..4d029bfdad3a
--- /dev/null
+++ b/lib/zinc/chacha20/chacha20-arm64-cryptogams.S
@@ -0,0 +1,1973 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2006-2017 CRYPTOGAMS by <appro@openssl.org>. All Rights Reserved.
+ */
+
+#include "arm_arch.h"
+
+.text
+
+
+
+.align 5
+.Lsigma:
+.quad 0x3320646e61707865,0x6b20657479622d32 // endian-neutral
+.Lone:
+.long 1,0,0,0
+.LOPENSSL_armcap_P:
+#ifdef __ILP32__
+.long OPENSSL_armcap_P-.
+#else
+.quad OPENSSL_armcap_P-.
+#endif
+.byte 67,104,97,67,104,97,50,48,32,102,111,114,32,65,82,77,118,56,44,32,67,82,89,80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114,111,64,111,112,101,110,115,115,108,46,111,114,103,62,0
+.align 2
+
+.globl ChaCha20_ctr32
+.type ChaCha20_ctr32,%function
+.align 5
+ChaCha20_ctr32:
+ cbz x2,.Labort
+ adr x5,.LOPENSSL_armcap_P
+ cmp x2,#192
+ b.lo .Lshort
+#ifdef __ILP32__
+ ldrsw x6,[x5]
+#else
+ ldr x6,[x5]
+#endif
+ ldr w17,[x6,x5]
+ tst w17,#ARMV7_NEON
+ b.ne ChaCha20_neon
+
+.Lshort:
+ stp x29,x30,[sp,#-96]!
+ add x29,sp,#0
+
+ adr x5,.Lsigma
+ stp x19,x20,[sp,#16]
+ stp x21,x22,[sp,#32]
+ stp x23,x24,[sp,#48]
+ stp x25,x26,[sp,#64]
+ stp x27,x28,[sp,#80]
+ sub sp,sp,#64
+
+ ldp x22,x23,[x5] // load sigma
+ ldp x24,x25,[x3] // load key
+ ldp x26,x27,[x3,#16]
+ ldp x28,x30,[x4] // load counter
+#ifdef __ARMEB__
+ ror x24,x24,#32
+ ror x25,x25,#32
+ ror x26,x26,#32
+ ror x27,x27,#32
+ ror x28,x28,#32
+ ror x30,x30,#32
+#endif
+
+.Loop_outer:
+ mov w5,w22 // unpack key block
+ lsr x6,x22,#32
+ mov w7,w23
+ lsr x8,x23,#32
+ mov w9,w24
+ lsr x10,x24,#32
+ mov w11,w25
+ lsr x12,x25,#32
+ mov w13,w26
+ lsr x14,x26,#32
+ mov w15,w27
+ lsr x16,x27,#32
+ mov w17,w28
+ lsr x19,x28,#32
+ mov w20,w30
+ lsr x21,x30,#32
+
+ mov x4,#10
+ subs x2,x2,#64
+.Loop:
+ sub x4,x4,#1
+ add w5,w5,w9
+ add w6,w6,w10
+ add w7,w7,w11
+ add w8,w8,w12
+ eor w17,w17,w5
+ eor w19,w19,w6
+ eor w20,w20,w7
+ eor w21,w21,w8
+ ror w17,w17,#16
+ ror w19,w19,#16
+ ror w20,w20,#16
+ ror w21,w21,#16
+ add w13,w13,w17
+ add w14,w14,w19
+ add w15,w15,w20
+ add w16,w16,w21
+ eor w9,w9,w13
+ eor w10,w10,w14
+ eor w11,w11,w15
+ eor w12,w12,w16
+ ror w9,w9,#20
+ ror w10,w10,#20
+ ror w11,w11,#20
+ ror w12,w12,#20
+ add w5,w5,w9
+ add w6,w6,w10
+ add w7,w7,w11
+ add w8,w8,w12
+ eor w17,w17,w5
+ eor w19,w19,w6
+ eor w20,w20,w7
+ eor w21,w21,w8
+ ror w17,w17,#24
+ ror w19,w19,#24
+ ror w20,w20,#24
+ ror w21,w21,#24
+ add w13,w13,w17
+ add w14,w14,w19
+ add w15,w15,w20
+ add w16,w16,w21
+ eor w9,w9,w13
+ eor w10,w10,w14
+ eor w11,w11,w15
+ eor w12,w12,w16
+ ror w9,w9,#25
+ ror w10,w10,#25
+ ror w11,w11,#25
+ ror w12,w12,#25
+ add w5,w5,w10
+ add w6,w6,w11
+ add w7,w7,w12
+ add w8,w8,w9
+ eor w21,w21,w5
+ eor w17,w17,w6
+ eor w19,w19,w7
+ eor w20,w20,w8
+ ror w21,w21,#16
+ ror w17,w17,#16
+ ror w19,w19,#16
+ ror w20,w20,#16
+ add w15,w15,w21
+ add w16,w16,w17
+ add w13,w13,w19
+ add w14,w14,w20
+ eor w10,w10,w15
+ eor w11,w11,w16
+ eor w12,w12,w13
+ eor w9,w9,w14
+ ror w10,w10,#20
+ ror w11,w11,#20
+ ror w12,w12,#20
+ ror w9,w9,#20
+ add w5,w5,w10
+ add w6,w6,w11
+ add w7,w7,w12
+ add w8,w8,w9
+ eor w21,w21,w5
+ eor w17,w17,w6
+ eor w19,w19,w7
+ eor w20,w20,w8
+ ror w21,w21,#24
+ ror w17,w17,#24
+ ror w19,w19,#24
+ ror w20,w20,#24
+ add w15,w15,w21
+ add w16,w16,w17
+ add w13,w13,w19
+ add w14,w14,w20
+ eor w10,w10,w15
+ eor w11,w11,w16
+ eor w12,w12,w13
+ eor w9,w9,w14
+ ror w10,w10,#25
+ ror w11,w11,#25
+ ror w12,w12,#25
+ ror w9,w9,#25
+ cbnz x4,.Loop
+
+ add w5,w5,w22 // accumulate key block
+ add x6,x6,x22,lsr#32
+ add w7,w7,w23
+ add x8,x8,x23,lsr#32
+ add w9,w9,w24
+ add x10,x10,x24,lsr#32
+ add w11,w11,w25
+ add x12,x12,x25,lsr#32
+ add w13,w13,w26
+ add x14,x14,x26,lsr#32
+ add w15,w15,w27
+ add x16,x16,x27,lsr#32
+ add w17,w17,w28
+ add x19,x19,x28,lsr#32
+ add w20,w20,w30
+ add x21,x21,x30,lsr#32
+
+ b.lo .Ltail
+
+ add x5,x5,x6,lsl#32 // pack
+ add x7,x7,x8,lsl#32
+ ldp x6,x8,[x1,#0] // load input
+ add x9,x9,x10,lsl#32
+ add x11,x11,x12,lsl#32
+ ldp x10,x12,[x1,#16]
+ add x13,x13,x14,lsl#32
+ add x15,x15,x16,lsl#32
+ ldp x14,x16,[x1,#32]
+ add x17,x17,x19,lsl#32
+ add x20,x20,x21,lsl#32
+ ldp x19,x21,[x1,#48]
+ add x1,x1,#64
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ eor x5,x5,x6
+ eor x7,x7,x8
+ eor x9,x9,x10
+ eor x11,x11,x12
+ eor x13,x13,x14
+ eor x15,x15,x16
+ eor x17,x17,x19
+ eor x20,x20,x21
+
+ stp x5,x7,[x0,#0] // store output
+ add x28,x28,#1 // increment counter
+ stp x9,x11,[x0,#16]
+ stp x13,x15,[x0,#32]
+ stp x17,x20,[x0,#48]
+ add x0,x0,#64
+
+ b.hi .Loop_outer
+
+ ldp x19,x20,[x29,#16]
+ add sp,sp,#64
+ ldp x21,x22,[x29,#32]
+ ldp x23,x24,[x29,#48]
+ ldp x25,x26,[x29,#64]
+ ldp x27,x28,[x29,#80]
+ ldp x29,x30,[sp],#96
+.Labort:
+ ret
+
+.align 4
+.Ltail:
+ add x2,x2,#64
+.Less_than_64:
+ sub x0,x0,#1
+ add x1,x1,x2
+ add x0,x0,x2
+ add x4,sp,x2
+ neg x2,x2
+
+ add x5,x5,x6,lsl#32 // pack
+ add x7,x7,x8,lsl#32
+ add x9,x9,x10,lsl#32
+ add x11,x11,x12,lsl#32
+ add x13,x13,x14,lsl#32
+ add x15,x15,x16,lsl#32
+ add x17,x17,x19,lsl#32
+ add x20,x20,x21,lsl#32
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ stp x5,x7,[sp,#0]
+ stp x9,x11,[sp,#16]
+ stp x13,x15,[sp,#32]
+ stp x17,x20,[sp,#48]
+
+.Loop_tail:
+ ldrb w10,[x1,x2]
+ ldrb w11,[x4,x2]
+ add x2,x2,#1
+ eor w10,w10,w11
+ strb w10,[x0,x2]
+ cbnz x2,.Loop_tail
+
+ stp xzr,xzr,[sp,#0]
+ stp xzr,xzr,[sp,#16]
+ stp xzr,xzr,[sp,#32]
+ stp xzr,xzr,[sp,#48]
+
+ ldp x19,x20,[x29,#16]
+ add sp,sp,#64
+ ldp x21,x22,[x29,#32]
+ ldp x23,x24,[x29,#48]
+ ldp x25,x26,[x29,#64]
+ ldp x27,x28,[x29,#80]
+ ldp x29,x30,[sp],#96
+ ret
+.size ChaCha20_ctr32,.-ChaCha20_ctr32
+
+.type ChaCha20_neon,%function
+.align 5
+ChaCha20_neon:
+ stp x29,x30,[sp,#-96]!
+ add x29,sp,#0
+
+ adr x5,.Lsigma
+ stp x19,x20,[sp,#16]
+ stp x21,x22,[sp,#32]
+ stp x23,x24,[sp,#48]
+ stp x25,x26,[sp,#64]
+ stp x27,x28,[sp,#80]
+ cmp x2,#512
+ b.hs .L512_or_more_neon
+
+ sub sp,sp,#64
+
+ ldp x22,x23,[x5] // load sigma
+ ld1 {v24.4s},[x5],#16
+ ldp x24,x25,[x3] // load key
+ ldp x26,x27,[x3,#16]
+ ld1 {v25.4s,v26.4s},[x3]
+ ldp x28,x30,[x4] // load counter
+ ld1 {v27.4s},[x4]
+ ld1 {v31.4s},[x5]
+#ifdef __ARMEB__
+ rev64 v24.4s,v24.4s
+ ror x24,x24,#32
+ ror x25,x25,#32
+ ror x26,x26,#32
+ ror x27,x27,#32
+ ror x28,x28,#32
+ ror x30,x30,#32
+#endif
+ add v27.4s,v27.4s,v31.4s // += 1
+ add v28.4s,v27.4s,v31.4s
+ add v29.4s,v28.4s,v31.4s
+ shl v31.4s,v31.4s,#2 // 1 -> 4
+
+.Loop_outer_neon:
+ mov w5,w22 // unpack key block
+ lsr x6,x22,#32
+ mov v0.16b,v24.16b
+ mov w7,w23
+ lsr x8,x23,#32
+ mov v4.16b,v24.16b
+ mov w9,w24
+ lsr x10,x24,#32
+ mov v16.16b,v24.16b
+ mov w11,w25
+ mov v1.16b,v25.16b
+ lsr x12,x25,#32
+ mov v5.16b,v25.16b
+ mov w13,w26
+ mov v17.16b,v25.16b
+ lsr x14,x26,#32
+ mov v3.16b,v27.16b
+ mov w15,w27
+ mov v7.16b,v28.16b
+ lsr x16,x27,#32
+ mov v19.16b,v29.16b
+ mov w17,w28
+ mov v2.16b,v26.16b
+ lsr x19,x28,#32
+ mov v6.16b,v26.16b
+ mov w20,w30
+ mov v18.16b,v26.16b
+ lsr x21,x30,#32
+
+ mov x4,#10
+ subs x2,x2,#256
+.Loop_neon:
+ sub x4,x4,#1
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w9
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w10
+ add v16.4s,v16.4s,v17.4s
+ add w7,w7,w11
+ eor v3.16b,v3.16b,v0.16b
+ add w8,w8,w12
+ eor v7.16b,v7.16b,v4.16b
+ eor w17,w17,w5
+ eor v19.16b,v19.16b,v16.16b
+ eor w19,w19,w6
+ rev32 v3.8h,v3.8h
+ eor w20,w20,w7
+ rev32 v7.8h,v7.8h
+ eor w21,w21,w8
+ rev32 v19.8h,v19.8h
+ ror w17,w17,#16
+ add v2.4s,v2.4s,v3.4s
+ ror w19,w19,#16
+ add v6.4s,v6.4s,v7.4s
+ ror w20,w20,#16
+ add v18.4s,v18.4s,v19.4s
+ ror w21,w21,#16
+ eor v20.16b,v1.16b,v2.16b
+ add w13,w13,w17
+ eor v21.16b,v5.16b,v6.16b
+ add w14,w14,w19
+ eor v22.16b,v17.16b,v18.16b
+ add w15,w15,w20
+ ushr v1.4s,v20.4s,#20
+ add w16,w16,w21
+ ushr v5.4s,v21.4s,#20
+ eor w9,w9,w13
+ ushr v17.4s,v22.4s,#20
+ eor w10,w10,w14
+ sli v1.4s,v20.4s,#12
+ eor w11,w11,w15
+ sli v5.4s,v21.4s,#12
+ eor w12,w12,w16
+ sli v17.4s,v22.4s,#12
+ ror w9,w9,#20
+ add v0.4s,v0.4s,v1.4s
+ ror w10,w10,#20
+ add v4.4s,v4.4s,v5.4s
+ ror w11,w11,#20
+ add v16.4s,v16.4s,v17.4s
+ ror w12,w12,#20
+ eor v20.16b,v3.16b,v0.16b
+ add w5,w5,w9
+ eor v21.16b,v7.16b,v4.16b
+ add w6,w6,w10
+ eor v22.16b,v19.16b,v16.16b
+ add w7,w7,w11
+ ushr v3.4s,v20.4s,#24
+ add w8,w8,w12
+ ushr v7.4s,v21.4s,#24
+ eor w17,w17,w5
+ ushr v19.4s,v22.4s,#24
+ eor w19,w19,w6
+ sli v3.4s,v20.4s,#8
+ eor w20,w20,w7
+ sli v7.4s,v21.4s,#8
+ eor w21,w21,w8
+ sli v19.4s,v22.4s,#8
+ ror w17,w17,#24
+ add v2.4s,v2.4s,v3.4s
+ ror w19,w19,#24
+ add v6.4s,v6.4s,v7.4s
+ ror w20,w20,#24
+ add v18.4s,v18.4s,v19.4s
+ ror w21,w21,#24
+ eor v20.16b,v1.16b,v2.16b
+ add w13,w13,w17
+ eor v21.16b,v5.16b,v6.16b
+ add w14,w14,w19
+ eor v22.16b,v17.16b,v18.16b
+ add w15,w15,w20
+ ushr v1.4s,v20.4s,#25
+ add w16,w16,w21
+ ushr v5.4s,v21.4s,#25
+ eor w9,w9,w13
+ ushr v17.4s,v22.4s,#25
+ eor w10,w10,w14
+ sli v1.4s,v20.4s,#7
+ eor w11,w11,w15
+ sli v5.4s,v21.4s,#7
+ eor w12,w12,w16
+ sli v17.4s,v22.4s,#7
+ ror w9,w9,#25
+ ext v2.16b,v2.16b,v2.16b,#8
+ ror w10,w10,#25
+ ext v6.16b,v6.16b,v6.16b,#8
+ ror w11,w11,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w12,w12,#25
+ ext v3.16b,v3.16b,v3.16b,#12
+ ext v7.16b,v7.16b,v7.16b,#12
+ ext v19.16b,v19.16b,v19.16b,#12
+ ext v1.16b,v1.16b,v1.16b,#4
+ ext v5.16b,v5.16b,v5.16b,#4
+ ext v17.16b,v17.16b,v17.16b,#4
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w10
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w11
+ add v16.4s,v16.4s,v17.4s
+ add w7,w7,w12
+ eor v3.16b,v3.16b,v0.16b
+ add w8,w8,w9
+ eor v7.16b,v7.16b,v4.16b
+ eor w21,w21,w5
+ eor v19.16b,v19.16b,v16.16b
+ eor w17,w17,w6
+ rev32 v3.8h,v3.8h
+ eor w19,w19,w7
+ rev32 v7.8h,v7.8h
+ eor w20,w20,w8
+ rev32 v19.8h,v19.8h
+ ror w21,w21,#16
+ add v2.4s,v2.4s,v3.4s
+ ror w17,w17,#16
+ add v6.4s,v6.4s,v7.4s
+ ror w19,w19,#16
+ add v18.4s,v18.4s,v19.4s
+ ror w20,w20,#16
+ eor v20.16b,v1.16b,v2.16b
+ add w15,w15,w21
+ eor v21.16b,v5.16b,v6.16b
+ add w16,w16,w17
+ eor v22.16b,v17.16b,v18.16b
+ add w13,w13,w19
+ ushr v1.4s,v20.4s,#20
+ add w14,w14,w20
+ ushr v5.4s,v21.4s,#20
+ eor w10,w10,w15
+ ushr v17.4s,v22.4s,#20
+ eor w11,w11,w16
+ sli v1.4s,v20.4s,#12
+ eor w12,w12,w13
+ sli v5.4s,v21.4s,#12
+ eor w9,w9,w14
+ sli v17.4s,v22.4s,#12
+ ror w10,w10,#20
+ add v0.4s,v0.4s,v1.4s
+ ror w11,w11,#20
+ add v4.4s,v4.4s,v5.4s
+ ror w12,w12,#20
+ add v16.4s,v16.4s,v17.4s
+ ror w9,w9,#20
+ eor v20.16b,v3.16b,v0.16b
+ add w5,w5,w10
+ eor v21.16b,v7.16b,v4.16b
+ add w6,w6,w11
+ eor v22.16b,v19.16b,v16.16b
+ add w7,w7,w12
+ ushr v3.4s,v20.4s,#24
+ add w8,w8,w9
+ ushr v7.4s,v21.4s,#24
+ eor w21,w21,w5
+ ushr v19.4s,v22.4s,#24
+ eor w17,w17,w6
+ sli v3.4s,v20.4s,#8
+ eor w19,w19,w7
+ sli v7.4s,v21.4s,#8
+ eor w20,w20,w8
+ sli v19.4s,v22.4s,#8
+ ror w21,w21,#24
+ add v2.4s,v2.4s,v3.4s
+ ror w17,w17,#24
+ add v6.4s,v6.4s,v7.4s
+ ror w19,w19,#24
+ add v18.4s,v18.4s,v19.4s
+ ror w20,w20,#24
+ eor v20.16b,v1.16b,v2.16b
+ add w15,w15,w21
+ eor v21.16b,v5.16b,v6.16b
+ add w16,w16,w17
+ eor v22.16b,v17.16b,v18.16b
+ add w13,w13,w19
+ ushr v1.4s,v20.4s,#25
+ add w14,w14,w20
+ ushr v5.4s,v21.4s,#25
+ eor w10,w10,w15
+ ushr v17.4s,v22.4s,#25
+ eor w11,w11,w16
+ sli v1.4s,v20.4s,#7
+ eor w12,w12,w13
+ sli v5.4s,v21.4s,#7
+ eor w9,w9,w14
+ sli v17.4s,v22.4s,#7
+ ror w10,w10,#25
+ ext v2.16b,v2.16b,v2.16b,#8
+ ror w11,w11,#25
+ ext v6.16b,v6.16b,v6.16b,#8
+ ror w12,w12,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w9,w9,#25
+ ext v3.16b,v3.16b,v3.16b,#4
+ ext v7.16b,v7.16b,v7.16b,#4
+ ext v19.16b,v19.16b,v19.16b,#4
+ ext v1.16b,v1.16b,v1.16b,#12
+ ext v5.16b,v5.16b,v5.16b,#12
+ ext v17.16b,v17.16b,v17.16b,#12
+ cbnz x4,.Loop_neon
+
+ add w5,w5,w22 // accumulate key block
+ add v0.4s,v0.4s,v24.4s
+ add x6,x6,x22,lsr#32
+ add v4.4s,v4.4s,v24.4s
+ add w7,w7,w23
+ add v16.4s,v16.4s,v24.4s
+ add x8,x8,x23,lsr#32
+ add v2.4s,v2.4s,v26.4s
+ add w9,w9,w24
+ add v6.4s,v6.4s,v26.4s
+ add x10,x10,x24,lsr#32
+ add v18.4s,v18.4s,v26.4s
+ add w11,w11,w25
+ add v3.4s,v3.4s,v27.4s
+ add x12,x12,x25,lsr#32
+ add w13,w13,w26
+ add v7.4s,v7.4s,v28.4s
+ add x14,x14,x26,lsr#32
+ add w15,w15,w27
+ add v19.4s,v19.4s,v29.4s
+ add x16,x16,x27,lsr#32
+ add w17,w17,w28
+ add v1.4s,v1.4s,v25.4s
+ add x19,x19,x28,lsr#32
+ add w20,w20,w30
+ add v5.4s,v5.4s,v25.4s
+ add x21,x21,x30,lsr#32
+ add v17.4s,v17.4s,v25.4s
+
+ b.lo .Ltail_neon
+
+ add x5,x5,x6,lsl#32 // pack
+ add x7,x7,x8,lsl#32
+ ldp x6,x8,[x1,#0] // load input
+ add x9,x9,x10,lsl#32
+ add x11,x11,x12,lsl#32
+ ldp x10,x12,[x1,#16]
+ add x13,x13,x14,lsl#32
+ add x15,x15,x16,lsl#32
+ ldp x14,x16,[x1,#32]
+ add x17,x17,x19,lsl#32
+ add x20,x20,x21,lsl#32
+ ldp x19,x21,[x1,#48]
+ add x1,x1,#64
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ ld1 {v20.16b,v21.16b,v22.16b,v23.16b},[x1],#64
+ eor x5,x5,x6
+ eor x7,x7,x8
+ eor x9,x9,x10
+ eor x11,x11,x12
+ eor x13,x13,x14
+ eor v0.16b,v0.16b,v20.16b
+ eor x15,x15,x16
+ eor v1.16b,v1.16b,v21.16b
+ eor x17,x17,x19
+ eor v2.16b,v2.16b,v22.16b
+ eor x20,x20,x21
+ eor v3.16b,v3.16b,v23.16b
+ ld1 {v20.16b,v21.16b,v22.16b,v23.16b},[x1],#64
+
+ stp x5,x7,[x0,#0] // store output
+ add x28,x28,#4 // increment counter
+ stp x9,x11,[x0,#16]
+ add v27.4s,v27.4s,v31.4s // += 4
+ stp x13,x15,[x0,#32]
+ add v28.4s,v28.4s,v31.4s
+ stp x17,x20,[x0,#48]
+ add v29.4s,v29.4s,v31.4s
+ add x0,x0,#64
+
+ st1 {v0.16b,v1.16b,v2.16b,v3.16b},[x0],#64
+ ld1 {v0.16b,v1.16b,v2.16b,v3.16b},[x1],#64
+
+ eor v4.16b,v4.16b,v20.16b
+ eor v5.16b,v5.16b,v21.16b
+ eor v6.16b,v6.16b,v22.16b
+ eor v7.16b,v7.16b,v23.16b
+ st1 {v4.16b,v5.16b,v6.16b,v7.16b},[x0],#64
+
+ eor v16.16b,v16.16b,v0.16b
+ eor v17.16b,v17.16b,v1.16b
+ eor v18.16b,v18.16b,v2.16b
+ eor v19.16b,v19.16b,v3.16b
+ st1 {v16.16b,v17.16b,v18.16b,v19.16b},[x0],#64
+
+ b.hi .Loop_outer_neon
+
+ ldp x19,x20,[x29,#16]
+ add sp,sp,#64
+ ldp x21,x22,[x29,#32]
+ ldp x23,x24,[x29,#48]
+ ldp x25,x26,[x29,#64]
+ ldp x27,x28,[x29,#80]
+ ldp x29,x30,[sp],#96
+ ret
+
+.Ltail_neon:
+ add x2,x2,#256
+ cmp x2,#64
+ b.lo .Less_than_64
+
+ add x5,x5,x6,lsl#32 // pack
+ add x7,x7,x8,lsl#32
+ ldp x6,x8,[x1,#0] // load input
+ add x9,x9,x10,lsl#32
+ add x11,x11,x12,lsl#32
+ ldp x10,x12,[x1,#16]
+ add x13,x13,x14,lsl#32
+ add x15,x15,x16,lsl#32
+ ldp x14,x16,[x1,#32]
+ add x17,x17,x19,lsl#32
+ add x20,x20,x21,lsl#32
+ ldp x19,x21,[x1,#48]
+ add x1,x1,#64
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ eor x5,x5,x6
+ eor x7,x7,x8
+ eor x9,x9,x10
+ eor x11,x11,x12
+ eor x13,x13,x14
+ eor x15,x15,x16
+ eor x17,x17,x19
+ eor x20,x20,x21
+
+ stp x5,x7,[x0,#0] // store output
+ add x28,x28,#4 // increment counter
+ stp x9,x11,[x0,#16]
+ stp x13,x15,[x0,#32]
+ stp x17,x20,[x0,#48]
+ add x0,x0,#64
+ b.eq .Ldone_neon
+ sub x2,x2,#64
+ cmp x2,#64
+ b.lo .Less_than_128
+
+ ld1 {v20.16b,v21.16b,v22.16b,v23.16b},[x1],#64
+ eor v0.16b,v0.16b,v20.16b
+ eor v1.16b,v1.16b,v21.16b
+ eor v2.16b,v2.16b,v22.16b
+ eor v3.16b,v3.16b,v23.16b
+ st1 {v0.16b,v1.16b,v2.16b,v3.16b},[x0],#64
+ b.eq .Ldone_neon
+ sub x2,x2,#64
+ cmp x2,#64
+ b.lo .Less_than_192
+
+ ld1 {v20.16b,v21.16b,v22.16b,v23.16b},[x1],#64
+ eor v4.16b,v4.16b,v20.16b
+ eor v5.16b,v5.16b,v21.16b
+ eor v6.16b,v6.16b,v22.16b
+ eor v7.16b,v7.16b,v23.16b
+ st1 {v4.16b,v5.16b,v6.16b,v7.16b},[x0],#64
+ b.eq .Ldone_neon
+ sub x2,x2,#64
+
+ st1 {v16.16b,v17.16b,v18.16b,v19.16b},[sp]
+ b .Last_neon
+
+.Less_than_128:
+ st1 {v0.16b,v1.16b,v2.16b,v3.16b},[sp]
+ b .Last_neon
+.Less_than_192:
+ st1 {v4.16b,v5.16b,v6.16b,v7.16b},[sp]
+ b .Last_neon
+
+.align 4
+.Last_neon:
+ sub x0,x0,#1
+ add x1,x1,x2
+ add x0,x0,x2
+ add x4,sp,x2
+ neg x2,x2
+
+.Loop_tail_neon:
+ ldrb w10,[x1,x2]
+ ldrb w11,[x4,x2]
+ add x2,x2,#1
+ eor w10,w10,w11
+ strb w10,[x0,x2]
+ cbnz x2,.Loop_tail_neon
+
+ stp xzr,xzr,[sp,#0]
+ stp xzr,xzr,[sp,#16]
+ stp xzr,xzr,[sp,#32]
+ stp xzr,xzr,[sp,#48]
+
+.Ldone_neon:
+ ldp x19,x20,[x29,#16]
+ add sp,sp,#64
+ ldp x21,x22,[x29,#32]
+ ldp x23,x24,[x29,#48]
+ ldp x25,x26,[x29,#64]
+ ldp x27,x28,[x29,#80]
+ ldp x29,x30,[sp],#96
+ ret
+.size ChaCha20_neon,.-ChaCha20_neon
+.type ChaCha20_512_neon,%function
+.align 5
+ChaCha20_512_neon:
+ stp x29,x30,[sp,#-96]!
+ add x29,sp,#0
+
+ adr x5,.Lsigma
+ stp x19,x20,[sp,#16]
+ stp x21,x22,[sp,#32]
+ stp x23,x24,[sp,#48]
+ stp x25,x26,[sp,#64]
+ stp x27,x28,[sp,#80]
+
+.L512_or_more_neon:
+ sub sp,sp,#128+64
+
+ ldp x22,x23,[x5] // load sigma
+ ld1 {v24.4s},[x5],#16
+ ldp x24,x25,[x3] // load key
+ ldp x26,x27,[x3,#16]
+ ld1 {v25.4s,v26.4s},[x3]
+ ldp x28,x30,[x4] // load counter
+ ld1 {v27.4s},[x4]
+ ld1 {v31.4s},[x5]
+#ifdef __ARMEB__
+ rev64 v24.4s,v24.4s
+ ror x24,x24,#32
+ ror x25,x25,#32
+ ror x26,x26,#32
+ ror x27,x27,#32
+ ror x28,x28,#32
+ ror x30,x30,#32
+#endif
+ add v27.4s,v27.4s,v31.4s // += 1
+ stp q24,q25,[sp,#0] // off-load key block, invariant part
+ add v27.4s,v27.4s,v31.4s // not typo
+ str q26,[sp,#32]
+ add v28.4s,v27.4s,v31.4s
+ add v29.4s,v28.4s,v31.4s
+ add v30.4s,v29.4s,v31.4s
+ shl v31.4s,v31.4s,#2 // 1 -> 4
+
+ stp d8,d9,[sp,#128+0] // meet ABI requirements
+ stp d10,d11,[sp,#128+16]
+ stp d12,d13,[sp,#128+32]
+ stp d14,d15,[sp,#128+48]
+
+ sub x2,x2,#512 // not typo
+
+.Loop_outer_512_neon:
+ mov v0.16b,v24.16b
+ mov v4.16b,v24.16b
+ mov v8.16b,v24.16b
+ mov v12.16b,v24.16b
+ mov v16.16b,v24.16b
+ mov v20.16b,v24.16b
+ mov v1.16b,v25.16b
+ mov w5,w22 // unpack key block
+ mov v5.16b,v25.16b
+ lsr x6,x22,#32
+ mov v9.16b,v25.16b
+ mov w7,w23
+ mov v13.16b,v25.16b
+ lsr x8,x23,#32
+ mov v17.16b,v25.16b
+ mov w9,w24
+ mov v21.16b,v25.16b
+ lsr x10,x24,#32
+ mov v3.16b,v27.16b
+ mov w11,w25
+ mov v7.16b,v28.16b
+ lsr x12,x25,#32
+ mov v11.16b,v29.16b
+ mov w13,w26
+ mov v15.16b,v30.16b
+ lsr x14,x26,#32
+ mov v2.16b,v26.16b
+ mov w15,w27
+ mov v6.16b,v26.16b
+ lsr x16,x27,#32
+ add v19.4s,v3.4s,v31.4s // +4
+ mov w17,w28
+ add v23.4s,v7.4s,v31.4s // +4
+ lsr x19,x28,#32
+ mov v10.16b,v26.16b
+ mov w20,w30
+ mov v14.16b,v26.16b
+ lsr x21,x30,#32
+ mov v18.16b,v26.16b
+ stp q27,q28,[sp,#48] // off-load key block, variable part
+ mov v22.16b,v26.16b
+ str q29,[sp,#80]
+
+ mov x4,#5
+ subs x2,x2,#512
+.Loop_upper_neon:
+ sub x4,x4,#1
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w9
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w10
+ add v8.4s,v8.4s,v9.4s
+ add w7,w7,w11
+ add v12.4s,v12.4s,v13.4s
+ add w8,w8,w12
+ add v16.4s,v16.4s,v17.4s
+ eor w17,w17,w5
+ add v20.4s,v20.4s,v21.4s
+ eor w19,w19,w6
+ eor v3.16b,v3.16b,v0.16b
+ eor w20,w20,w7
+ eor v7.16b,v7.16b,v4.16b
+ eor w21,w21,w8
+ eor v11.16b,v11.16b,v8.16b
+ ror w17,w17,#16
+ eor v15.16b,v15.16b,v12.16b
+ ror w19,w19,#16
+ eor v19.16b,v19.16b,v16.16b
+ ror w20,w20,#16
+ eor v23.16b,v23.16b,v20.16b
+ ror w21,w21,#16
+ rev32 v3.8h,v3.8h
+ add w13,w13,w17
+ rev32 v7.8h,v7.8h
+ add w14,w14,w19
+ rev32 v11.8h,v11.8h
+ add w15,w15,w20
+ rev32 v15.8h,v15.8h
+ add w16,w16,w21
+ rev32 v19.8h,v19.8h
+ eor w9,w9,w13
+ rev32 v23.8h,v23.8h
+ eor w10,w10,w14
+ add v2.4s,v2.4s,v3.4s
+ eor w11,w11,w15
+ add v6.4s,v6.4s,v7.4s
+ eor w12,w12,w16
+ add v10.4s,v10.4s,v11.4s
+ ror w9,w9,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w10,w10,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w11,w11,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w12,w12,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w9
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w10
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w11
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w12
+ eor v28.16b,v17.16b,v18.16b
+ eor w17,w17,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w19,w19,w6
+ ushr v1.4s,v24.4s,#20
+ eor w20,w20,w7
+ ushr v5.4s,v25.4s,#20
+ eor w21,w21,w8
+ ushr v9.4s,v26.4s,#20
+ ror w17,w17,#24
+ ushr v13.4s,v27.4s,#20
+ ror w19,w19,#24
+ ushr v17.4s,v28.4s,#20
+ ror w20,w20,#24
+ ushr v21.4s,v29.4s,#20
+ ror w21,w21,#24
+ sli v1.4s,v24.4s,#12
+ add w13,w13,w17
+ sli v5.4s,v25.4s,#12
+ add w14,w14,w19
+ sli v9.4s,v26.4s,#12
+ add w15,w15,w20
+ sli v13.4s,v27.4s,#12
+ add w16,w16,w21
+ sli v17.4s,v28.4s,#12
+ eor w9,w9,w13
+ sli v21.4s,v29.4s,#12
+ eor w10,w10,w14
+ add v0.4s,v0.4s,v1.4s
+ eor w11,w11,w15
+ add v4.4s,v4.4s,v5.4s
+ eor w12,w12,w16
+ add v8.4s,v8.4s,v9.4s
+ ror w9,w9,#25
+ add v12.4s,v12.4s,v13.4s
+ ror w10,w10,#25
+ add v16.4s,v16.4s,v17.4s
+ ror w11,w11,#25
+ add v20.4s,v20.4s,v21.4s
+ ror w12,w12,#25
+ eor v24.16b,v3.16b,v0.16b
+ add w5,w5,w10
+ eor v25.16b,v7.16b,v4.16b
+ add w6,w6,w11
+ eor v26.16b,v11.16b,v8.16b
+ add w7,w7,w12
+ eor v27.16b,v15.16b,v12.16b
+ add w8,w8,w9
+ eor v28.16b,v19.16b,v16.16b
+ eor w21,w21,w5
+ eor v29.16b,v23.16b,v20.16b
+ eor w17,w17,w6
+ ushr v3.4s,v24.4s,#24
+ eor w19,w19,w7
+ ushr v7.4s,v25.4s,#24
+ eor w20,w20,w8
+ ushr v11.4s,v26.4s,#24
+ ror w21,w21,#16
+ ushr v15.4s,v27.4s,#24
+ ror w17,w17,#16
+ ushr v19.4s,v28.4s,#24
+ ror w19,w19,#16
+ ushr v23.4s,v29.4s,#24
+ ror w20,w20,#16
+ sli v3.4s,v24.4s,#8
+ add w15,w15,w21
+ sli v7.4s,v25.4s,#8
+ add w16,w16,w17
+ sli v11.4s,v26.4s,#8
+ add w13,w13,w19
+ sli v15.4s,v27.4s,#8
+ add w14,w14,w20
+ sli v19.4s,v28.4s,#8
+ eor w10,w10,w15
+ sli v23.4s,v29.4s,#8
+ eor w11,w11,w16
+ add v2.4s,v2.4s,v3.4s
+ eor w12,w12,w13
+ add v6.4s,v6.4s,v7.4s
+ eor w9,w9,w14
+ add v10.4s,v10.4s,v11.4s
+ ror w10,w10,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w11,w11,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w12,w12,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w9,w9,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w10
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w11
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w12
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w9
+ eor v28.16b,v17.16b,v18.16b
+ eor w21,w21,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w17,w17,w6
+ ushr v1.4s,v24.4s,#25
+ eor w19,w19,w7
+ ushr v5.4s,v25.4s,#25
+ eor w20,w20,w8
+ ushr v9.4s,v26.4s,#25
+ ror w21,w21,#24
+ ushr v13.4s,v27.4s,#25
+ ror w17,w17,#24
+ ushr v17.4s,v28.4s,#25
+ ror w19,w19,#24
+ ushr v21.4s,v29.4s,#25
+ ror w20,w20,#24
+ sli v1.4s,v24.4s,#7
+ add w15,w15,w21
+ sli v5.4s,v25.4s,#7
+ add w16,w16,w17
+ sli v9.4s,v26.4s,#7
+ add w13,w13,w19
+ sli v13.4s,v27.4s,#7
+ add w14,w14,w20
+ sli v17.4s,v28.4s,#7
+ eor w10,w10,w15
+ sli v21.4s,v29.4s,#7
+ eor w11,w11,w16
+ ext v2.16b,v2.16b,v2.16b,#8
+ eor w12,w12,w13
+ ext v6.16b,v6.16b,v6.16b,#8
+ eor w9,w9,w14
+ ext v10.16b,v10.16b,v10.16b,#8
+ ror w10,w10,#25
+ ext v14.16b,v14.16b,v14.16b,#8
+ ror w11,w11,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w12,w12,#25
+ ext v22.16b,v22.16b,v22.16b,#8
+ ror w9,w9,#25
+ ext v3.16b,v3.16b,v3.16b,#12
+ ext v7.16b,v7.16b,v7.16b,#12
+ ext v11.16b,v11.16b,v11.16b,#12
+ ext v15.16b,v15.16b,v15.16b,#12
+ ext v19.16b,v19.16b,v19.16b,#12
+ ext v23.16b,v23.16b,v23.16b,#12
+ ext v1.16b,v1.16b,v1.16b,#4
+ ext v5.16b,v5.16b,v5.16b,#4
+ ext v9.16b,v9.16b,v9.16b,#4
+ ext v13.16b,v13.16b,v13.16b,#4
+ ext v17.16b,v17.16b,v17.16b,#4
+ ext v21.16b,v21.16b,v21.16b,#4
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w9
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w10
+ add v8.4s,v8.4s,v9.4s
+ add w7,w7,w11
+ add v12.4s,v12.4s,v13.4s
+ add w8,w8,w12
+ add v16.4s,v16.4s,v17.4s
+ eor w17,w17,w5
+ add v20.4s,v20.4s,v21.4s
+ eor w19,w19,w6
+ eor v3.16b,v3.16b,v0.16b
+ eor w20,w20,w7
+ eor v7.16b,v7.16b,v4.16b
+ eor w21,w21,w8
+ eor v11.16b,v11.16b,v8.16b
+ ror w17,w17,#16
+ eor v15.16b,v15.16b,v12.16b
+ ror w19,w19,#16
+ eor v19.16b,v19.16b,v16.16b
+ ror w20,w20,#16
+ eor v23.16b,v23.16b,v20.16b
+ ror w21,w21,#16
+ rev32 v3.8h,v3.8h
+ add w13,w13,w17
+ rev32 v7.8h,v7.8h
+ add w14,w14,w19
+ rev32 v11.8h,v11.8h
+ add w15,w15,w20
+ rev32 v15.8h,v15.8h
+ add w16,w16,w21
+ rev32 v19.8h,v19.8h
+ eor w9,w9,w13
+ rev32 v23.8h,v23.8h
+ eor w10,w10,w14
+ add v2.4s,v2.4s,v3.4s
+ eor w11,w11,w15
+ add v6.4s,v6.4s,v7.4s
+ eor w12,w12,w16
+ add v10.4s,v10.4s,v11.4s
+ ror w9,w9,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w10,w10,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w11,w11,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w12,w12,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w9
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w10
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w11
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w12
+ eor v28.16b,v17.16b,v18.16b
+ eor w17,w17,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w19,w19,w6
+ ushr v1.4s,v24.4s,#20
+ eor w20,w20,w7
+ ushr v5.4s,v25.4s,#20
+ eor w21,w21,w8
+ ushr v9.4s,v26.4s,#20
+ ror w17,w17,#24
+ ushr v13.4s,v27.4s,#20
+ ror w19,w19,#24
+ ushr v17.4s,v28.4s,#20
+ ror w20,w20,#24
+ ushr v21.4s,v29.4s,#20
+ ror w21,w21,#24
+ sli v1.4s,v24.4s,#12
+ add w13,w13,w17
+ sli v5.4s,v25.4s,#12
+ add w14,w14,w19
+ sli v9.4s,v26.4s,#12
+ add w15,w15,w20
+ sli v13.4s,v27.4s,#12
+ add w16,w16,w21
+ sli v17.4s,v28.4s,#12
+ eor w9,w9,w13
+ sli v21.4s,v29.4s,#12
+ eor w10,w10,w14
+ add v0.4s,v0.4s,v1.4s
+ eor w11,w11,w15
+ add v4.4s,v4.4s,v5.4s
+ eor w12,w12,w16
+ add v8.4s,v8.4s,v9.4s
+ ror w9,w9,#25
+ add v12.4s,v12.4s,v13.4s
+ ror w10,w10,#25
+ add v16.4s,v16.4s,v17.4s
+ ror w11,w11,#25
+ add v20.4s,v20.4s,v21.4s
+ ror w12,w12,#25
+ eor v24.16b,v3.16b,v0.16b
+ add w5,w5,w10
+ eor v25.16b,v7.16b,v4.16b
+ add w6,w6,w11
+ eor v26.16b,v11.16b,v8.16b
+ add w7,w7,w12
+ eor v27.16b,v15.16b,v12.16b
+ add w8,w8,w9
+ eor v28.16b,v19.16b,v16.16b
+ eor w21,w21,w5
+ eor v29.16b,v23.16b,v20.16b
+ eor w17,w17,w6
+ ushr v3.4s,v24.4s,#24
+ eor w19,w19,w7
+ ushr v7.4s,v25.4s,#24
+ eor w20,w20,w8
+ ushr v11.4s,v26.4s,#24
+ ror w21,w21,#16
+ ushr v15.4s,v27.4s,#24
+ ror w17,w17,#16
+ ushr v19.4s,v28.4s,#24
+ ror w19,w19,#16
+ ushr v23.4s,v29.4s,#24
+ ror w20,w20,#16
+ sli v3.4s,v24.4s,#8
+ add w15,w15,w21
+ sli v7.4s,v25.4s,#8
+ add w16,w16,w17
+ sli v11.4s,v26.4s,#8
+ add w13,w13,w19
+ sli v15.4s,v27.4s,#8
+ add w14,w14,w20
+ sli v19.4s,v28.4s,#8
+ eor w10,w10,w15
+ sli v23.4s,v29.4s,#8
+ eor w11,w11,w16
+ add v2.4s,v2.4s,v3.4s
+ eor w12,w12,w13
+ add v6.4s,v6.4s,v7.4s
+ eor w9,w9,w14
+ add v10.4s,v10.4s,v11.4s
+ ror w10,w10,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w11,w11,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w12,w12,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w9,w9,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w10
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w11
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w12
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w9
+ eor v28.16b,v17.16b,v18.16b
+ eor w21,w21,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w17,w17,w6
+ ushr v1.4s,v24.4s,#25
+ eor w19,w19,w7
+ ushr v5.4s,v25.4s,#25
+ eor w20,w20,w8
+ ushr v9.4s,v26.4s,#25
+ ror w21,w21,#24
+ ushr v13.4s,v27.4s,#25
+ ror w17,w17,#24
+ ushr v17.4s,v28.4s,#25
+ ror w19,w19,#24
+ ushr v21.4s,v29.4s,#25
+ ror w20,w20,#24
+ sli v1.4s,v24.4s,#7
+ add w15,w15,w21
+ sli v5.4s,v25.4s,#7
+ add w16,w16,w17
+ sli v9.4s,v26.4s,#7
+ add w13,w13,w19
+ sli v13.4s,v27.4s,#7
+ add w14,w14,w20
+ sli v17.4s,v28.4s,#7
+ eor w10,w10,w15
+ sli v21.4s,v29.4s,#7
+ eor w11,w11,w16
+ ext v2.16b,v2.16b,v2.16b,#8
+ eor w12,w12,w13
+ ext v6.16b,v6.16b,v6.16b,#8
+ eor w9,w9,w14
+ ext v10.16b,v10.16b,v10.16b,#8
+ ror w10,w10,#25
+ ext v14.16b,v14.16b,v14.16b,#8
+ ror w11,w11,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w12,w12,#25
+ ext v22.16b,v22.16b,v22.16b,#8
+ ror w9,w9,#25
+ ext v3.16b,v3.16b,v3.16b,#4
+ ext v7.16b,v7.16b,v7.16b,#4
+ ext v11.16b,v11.16b,v11.16b,#4
+ ext v15.16b,v15.16b,v15.16b,#4
+ ext v19.16b,v19.16b,v19.16b,#4
+ ext v23.16b,v23.16b,v23.16b,#4
+ ext v1.16b,v1.16b,v1.16b,#12
+ ext v5.16b,v5.16b,v5.16b,#12
+ ext v9.16b,v9.16b,v9.16b,#12
+ ext v13.16b,v13.16b,v13.16b,#12
+ ext v17.16b,v17.16b,v17.16b,#12
+ ext v21.16b,v21.16b,v21.16b,#12
+ cbnz x4,.Loop_upper_neon
+
+ add w5,w5,w22 // accumulate key block
+ add x6,x6,x22,lsr#32
+ add w7,w7,w23
+ add x8,x8,x23,lsr#32
+ add w9,w9,w24
+ add x10,x10,x24,lsr#32
+ add w11,w11,w25
+ add x12,x12,x25,lsr#32
+ add w13,w13,w26
+ add x14,x14,x26,lsr#32
+ add w15,w15,w27
+ add x16,x16,x27,lsr#32
+ add w17,w17,w28
+ add x19,x19,x28,lsr#32
+ add w20,w20,w30
+ add x21,x21,x30,lsr#32
+
+ add x5,x5,x6,lsl#32 // pack
+ add x7,x7,x8,lsl#32
+ ldp x6,x8,[x1,#0] // load input
+ add x9,x9,x10,lsl#32
+ add x11,x11,x12,lsl#32
+ ldp x10,x12,[x1,#16]
+ add x13,x13,x14,lsl#32
+ add x15,x15,x16,lsl#32
+ ldp x14,x16,[x1,#32]
+ add x17,x17,x19,lsl#32
+ add x20,x20,x21,lsl#32
+ ldp x19,x21,[x1,#48]
+ add x1,x1,#64
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ eor x5,x5,x6
+ eor x7,x7,x8
+ eor x9,x9,x10
+ eor x11,x11,x12
+ eor x13,x13,x14
+ eor x15,x15,x16
+ eor x17,x17,x19
+ eor x20,x20,x21
+
+ stp x5,x7,[x0,#0] // store output
+ add x28,x28,#1 // increment counter
+ mov w5,w22 // unpack key block
+ lsr x6,x22,#32
+ stp x9,x11,[x0,#16]
+ mov w7,w23
+ lsr x8,x23,#32
+ stp x13,x15,[x0,#32]
+ mov w9,w24
+ lsr x10,x24,#32
+ stp x17,x20,[x0,#48]
+ add x0,x0,#64
+ mov w11,w25
+ lsr x12,x25,#32
+ mov w13,w26
+ lsr x14,x26,#32
+ mov w15,w27
+ lsr x16,x27,#32
+ mov w17,w28
+ lsr x19,x28,#32
+ mov w20,w30
+ lsr x21,x30,#32
+
+ mov x4,#5
+.Loop_lower_neon:
+ sub x4,x4,#1
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w9
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w10
+ add v8.4s,v8.4s,v9.4s
+ add w7,w7,w11
+ add v12.4s,v12.4s,v13.4s
+ add w8,w8,w12
+ add v16.4s,v16.4s,v17.4s
+ eor w17,w17,w5
+ add v20.4s,v20.4s,v21.4s
+ eor w19,w19,w6
+ eor v3.16b,v3.16b,v0.16b
+ eor w20,w20,w7
+ eor v7.16b,v7.16b,v4.16b
+ eor w21,w21,w8
+ eor v11.16b,v11.16b,v8.16b
+ ror w17,w17,#16
+ eor v15.16b,v15.16b,v12.16b
+ ror w19,w19,#16
+ eor v19.16b,v19.16b,v16.16b
+ ror w20,w20,#16
+ eor v23.16b,v23.16b,v20.16b
+ ror w21,w21,#16
+ rev32 v3.8h,v3.8h
+ add w13,w13,w17
+ rev32 v7.8h,v7.8h
+ add w14,w14,w19
+ rev32 v11.8h,v11.8h
+ add w15,w15,w20
+ rev32 v15.8h,v15.8h
+ add w16,w16,w21
+ rev32 v19.8h,v19.8h
+ eor w9,w9,w13
+ rev32 v23.8h,v23.8h
+ eor w10,w10,w14
+ add v2.4s,v2.4s,v3.4s
+ eor w11,w11,w15
+ add v6.4s,v6.4s,v7.4s
+ eor w12,w12,w16
+ add v10.4s,v10.4s,v11.4s
+ ror w9,w9,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w10,w10,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w11,w11,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w12,w12,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w9
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w10
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w11
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w12
+ eor v28.16b,v17.16b,v18.16b
+ eor w17,w17,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w19,w19,w6
+ ushr v1.4s,v24.4s,#20
+ eor w20,w20,w7
+ ushr v5.4s,v25.4s,#20
+ eor w21,w21,w8
+ ushr v9.4s,v26.4s,#20
+ ror w17,w17,#24
+ ushr v13.4s,v27.4s,#20
+ ror w19,w19,#24
+ ushr v17.4s,v28.4s,#20
+ ror w20,w20,#24
+ ushr v21.4s,v29.4s,#20
+ ror w21,w21,#24
+ sli v1.4s,v24.4s,#12
+ add w13,w13,w17
+ sli v5.4s,v25.4s,#12
+ add w14,w14,w19
+ sli v9.4s,v26.4s,#12
+ add w15,w15,w20
+ sli v13.4s,v27.4s,#12
+ add w16,w16,w21
+ sli v17.4s,v28.4s,#12
+ eor w9,w9,w13
+ sli v21.4s,v29.4s,#12
+ eor w10,w10,w14
+ add v0.4s,v0.4s,v1.4s
+ eor w11,w11,w15
+ add v4.4s,v4.4s,v5.4s
+ eor w12,w12,w16
+ add v8.4s,v8.4s,v9.4s
+ ror w9,w9,#25
+ add v12.4s,v12.4s,v13.4s
+ ror w10,w10,#25
+ add v16.4s,v16.4s,v17.4s
+ ror w11,w11,#25
+ add v20.4s,v20.4s,v21.4s
+ ror w12,w12,#25
+ eor v24.16b,v3.16b,v0.16b
+ add w5,w5,w10
+ eor v25.16b,v7.16b,v4.16b
+ add w6,w6,w11
+ eor v26.16b,v11.16b,v8.16b
+ add w7,w7,w12
+ eor v27.16b,v15.16b,v12.16b
+ add w8,w8,w9
+ eor v28.16b,v19.16b,v16.16b
+ eor w21,w21,w5
+ eor v29.16b,v23.16b,v20.16b
+ eor w17,w17,w6
+ ushr v3.4s,v24.4s,#24
+ eor w19,w19,w7
+ ushr v7.4s,v25.4s,#24
+ eor w20,w20,w8
+ ushr v11.4s,v26.4s,#24
+ ror w21,w21,#16
+ ushr v15.4s,v27.4s,#24
+ ror w17,w17,#16
+ ushr v19.4s,v28.4s,#24
+ ror w19,w19,#16
+ ushr v23.4s,v29.4s,#24
+ ror w20,w20,#16
+ sli v3.4s,v24.4s,#8
+ add w15,w15,w21
+ sli v7.4s,v25.4s,#8
+ add w16,w16,w17
+ sli v11.4s,v26.4s,#8
+ add w13,w13,w19
+ sli v15.4s,v27.4s,#8
+ add w14,w14,w20
+ sli v19.4s,v28.4s,#8
+ eor w10,w10,w15
+ sli v23.4s,v29.4s,#8
+ eor w11,w11,w16
+ add v2.4s,v2.4s,v3.4s
+ eor w12,w12,w13
+ add v6.4s,v6.4s,v7.4s
+ eor w9,w9,w14
+ add v10.4s,v10.4s,v11.4s
+ ror w10,w10,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w11,w11,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w12,w12,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w9,w9,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w10
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w11
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w12
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w9
+ eor v28.16b,v17.16b,v18.16b
+ eor w21,w21,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w17,w17,w6
+ ushr v1.4s,v24.4s,#25
+ eor w19,w19,w7
+ ushr v5.4s,v25.4s,#25
+ eor w20,w20,w8
+ ushr v9.4s,v26.4s,#25
+ ror w21,w21,#24
+ ushr v13.4s,v27.4s,#25
+ ror w17,w17,#24
+ ushr v17.4s,v28.4s,#25
+ ror w19,w19,#24
+ ushr v21.4s,v29.4s,#25
+ ror w20,w20,#24
+ sli v1.4s,v24.4s,#7
+ add w15,w15,w21
+ sli v5.4s,v25.4s,#7
+ add w16,w16,w17
+ sli v9.4s,v26.4s,#7
+ add w13,w13,w19
+ sli v13.4s,v27.4s,#7
+ add w14,w14,w20
+ sli v17.4s,v28.4s,#7
+ eor w10,w10,w15
+ sli v21.4s,v29.4s,#7
+ eor w11,w11,w16
+ ext v2.16b,v2.16b,v2.16b,#8
+ eor w12,w12,w13
+ ext v6.16b,v6.16b,v6.16b,#8
+ eor w9,w9,w14
+ ext v10.16b,v10.16b,v10.16b,#8
+ ror w10,w10,#25
+ ext v14.16b,v14.16b,v14.16b,#8
+ ror w11,w11,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w12,w12,#25
+ ext v22.16b,v22.16b,v22.16b,#8
+ ror w9,w9,#25
+ ext v3.16b,v3.16b,v3.16b,#12
+ ext v7.16b,v7.16b,v7.16b,#12
+ ext v11.16b,v11.16b,v11.16b,#12
+ ext v15.16b,v15.16b,v15.16b,#12
+ ext v19.16b,v19.16b,v19.16b,#12
+ ext v23.16b,v23.16b,v23.16b,#12
+ ext v1.16b,v1.16b,v1.16b,#4
+ ext v5.16b,v5.16b,v5.16b,#4
+ ext v9.16b,v9.16b,v9.16b,#4
+ ext v13.16b,v13.16b,v13.16b,#4
+ ext v17.16b,v17.16b,v17.16b,#4
+ ext v21.16b,v21.16b,v21.16b,#4
+ add v0.4s,v0.4s,v1.4s
+ add w5,w5,w9
+ add v4.4s,v4.4s,v5.4s
+ add w6,w6,w10
+ add v8.4s,v8.4s,v9.4s
+ add w7,w7,w11
+ add v12.4s,v12.4s,v13.4s
+ add w8,w8,w12
+ add v16.4s,v16.4s,v17.4s
+ eor w17,w17,w5
+ add v20.4s,v20.4s,v21.4s
+ eor w19,w19,w6
+ eor v3.16b,v3.16b,v0.16b
+ eor w20,w20,w7
+ eor v7.16b,v7.16b,v4.16b
+ eor w21,w21,w8
+ eor v11.16b,v11.16b,v8.16b
+ ror w17,w17,#16
+ eor v15.16b,v15.16b,v12.16b
+ ror w19,w19,#16
+ eor v19.16b,v19.16b,v16.16b
+ ror w20,w20,#16
+ eor v23.16b,v23.16b,v20.16b
+ ror w21,w21,#16
+ rev32 v3.8h,v3.8h
+ add w13,w13,w17
+ rev32 v7.8h,v7.8h
+ add w14,w14,w19
+ rev32 v11.8h,v11.8h
+ add w15,w15,w20
+ rev32 v15.8h,v15.8h
+ add w16,w16,w21
+ rev32 v19.8h,v19.8h
+ eor w9,w9,w13
+ rev32 v23.8h,v23.8h
+ eor w10,w10,w14
+ add v2.4s,v2.4s,v3.4s
+ eor w11,w11,w15
+ add v6.4s,v6.4s,v7.4s
+ eor w12,w12,w16
+ add v10.4s,v10.4s,v11.4s
+ ror w9,w9,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w10,w10,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w11,w11,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w12,w12,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w9
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w10
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w11
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w12
+ eor v28.16b,v17.16b,v18.16b
+ eor w17,w17,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w19,w19,w6
+ ushr v1.4s,v24.4s,#20
+ eor w20,w20,w7
+ ushr v5.4s,v25.4s,#20
+ eor w21,w21,w8
+ ushr v9.4s,v26.4s,#20
+ ror w17,w17,#24
+ ushr v13.4s,v27.4s,#20
+ ror w19,w19,#24
+ ushr v17.4s,v28.4s,#20
+ ror w20,w20,#24
+ ushr v21.4s,v29.4s,#20
+ ror w21,w21,#24
+ sli v1.4s,v24.4s,#12
+ add w13,w13,w17
+ sli v5.4s,v25.4s,#12
+ add w14,w14,w19
+ sli v9.4s,v26.4s,#12
+ add w15,w15,w20
+ sli v13.4s,v27.4s,#12
+ add w16,w16,w21
+ sli v17.4s,v28.4s,#12
+ eor w9,w9,w13
+ sli v21.4s,v29.4s,#12
+ eor w10,w10,w14
+ add v0.4s,v0.4s,v1.4s
+ eor w11,w11,w15
+ add v4.4s,v4.4s,v5.4s
+ eor w12,w12,w16
+ add v8.4s,v8.4s,v9.4s
+ ror w9,w9,#25
+ add v12.4s,v12.4s,v13.4s
+ ror w10,w10,#25
+ add v16.4s,v16.4s,v17.4s
+ ror w11,w11,#25
+ add v20.4s,v20.4s,v21.4s
+ ror w12,w12,#25
+ eor v24.16b,v3.16b,v0.16b
+ add w5,w5,w10
+ eor v25.16b,v7.16b,v4.16b
+ add w6,w6,w11
+ eor v26.16b,v11.16b,v8.16b
+ add w7,w7,w12
+ eor v27.16b,v15.16b,v12.16b
+ add w8,w8,w9
+ eor v28.16b,v19.16b,v16.16b
+ eor w21,w21,w5
+ eor v29.16b,v23.16b,v20.16b
+ eor w17,w17,w6
+ ushr v3.4s,v24.4s,#24
+ eor w19,w19,w7
+ ushr v7.4s,v25.4s,#24
+ eor w20,w20,w8
+ ushr v11.4s,v26.4s,#24
+ ror w21,w21,#16
+ ushr v15.4s,v27.4s,#24
+ ror w17,w17,#16
+ ushr v19.4s,v28.4s,#24
+ ror w19,w19,#16
+ ushr v23.4s,v29.4s,#24
+ ror w20,w20,#16
+ sli v3.4s,v24.4s,#8
+ add w15,w15,w21
+ sli v7.4s,v25.4s,#8
+ add w16,w16,w17
+ sli v11.4s,v26.4s,#8
+ add w13,w13,w19
+ sli v15.4s,v27.4s,#8
+ add w14,w14,w20
+ sli v19.4s,v28.4s,#8
+ eor w10,w10,w15
+ sli v23.4s,v29.4s,#8
+ eor w11,w11,w16
+ add v2.4s,v2.4s,v3.4s
+ eor w12,w12,w13
+ add v6.4s,v6.4s,v7.4s
+ eor w9,w9,w14
+ add v10.4s,v10.4s,v11.4s
+ ror w10,w10,#20
+ add v14.4s,v14.4s,v15.4s
+ ror w11,w11,#20
+ add v18.4s,v18.4s,v19.4s
+ ror w12,w12,#20
+ add v22.4s,v22.4s,v23.4s
+ ror w9,w9,#20
+ eor v24.16b,v1.16b,v2.16b
+ add w5,w5,w10
+ eor v25.16b,v5.16b,v6.16b
+ add w6,w6,w11
+ eor v26.16b,v9.16b,v10.16b
+ add w7,w7,w12
+ eor v27.16b,v13.16b,v14.16b
+ add w8,w8,w9
+ eor v28.16b,v17.16b,v18.16b
+ eor w21,w21,w5
+ eor v29.16b,v21.16b,v22.16b
+ eor w17,w17,w6
+ ushr v1.4s,v24.4s,#25
+ eor w19,w19,w7
+ ushr v5.4s,v25.4s,#25
+ eor w20,w20,w8
+ ushr v9.4s,v26.4s,#25
+ ror w21,w21,#24
+ ushr v13.4s,v27.4s,#25
+ ror w17,w17,#24
+ ushr v17.4s,v28.4s,#25
+ ror w19,w19,#24
+ ushr v21.4s,v29.4s,#25
+ ror w20,w20,#24
+ sli v1.4s,v24.4s,#7
+ add w15,w15,w21
+ sli v5.4s,v25.4s,#7
+ add w16,w16,w17
+ sli v9.4s,v26.4s,#7
+ add w13,w13,w19
+ sli v13.4s,v27.4s,#7
+ add w14,w14,w20
+ sli v17.4s,v28.4s,#7
+ eor w10,w10,w15
+ sli v21.4s,v29.4s,#7
+ eor w11,w11,w16
+ ext v2.16b,v2.16b,v2.16b,#8
+ eor w12,w12,w13
+ ext v6.16b,v6.16b,v6.16b,#8
+ eor w9,w9,w14
+ ext v10.16b,v10.16b,v10.16b,#8
+ ror w10,w10,#25
+ ext v14.16b,v14.16b,v14.16b,#8
+ ror w11,w11,#25
+ ext v18.16b,v18.16b,v18.16b,#8
+ ror w12,w12,#25
+ ext v22.16b,v22.16b,v22.16b,#8
+ ror w9,w9,#25
+ ext v3.16b,v3.16b,v3.16b,#4
+ ext v7.16b,v7.16b,v7.16b,#4
+ ext v11.16b,v11.16b,v11.16b,#4
+ ext v15.16b,v15.16b,v15.16b,#4
+ ext v19.16b,v19.16b,v19.16b,#4
+ ext v23.16b,v23.16b,v23.16b,#4
+ ext v1.16b,v1.16b,v1.16b,#12
+ ext v5.16b,v5.16b,v5.16b,#12
+ ext v9.16b,v9.16b,v9.16b,#12
+ ext v13.16b,v13.16b,v13.16b,#12
+ ext v17.16b,v17.16b,v17.16b,#12
+ ext v21.16b,v21.16b,v21.16b,#12
+ cbnz x4,.Loop_lower_neon
+
+ add w5,w5,w22 // accumulate key block
+ ldp q24,q25,[sp,#0]
+ add x6,x6,x22,lsr#32
+ ldp q26,q27,[sp,#32]
+ add w7,w7,w23
+ ldp q28,q29,[sp,#64]
+ add x8,x8,x23,lsr#32
+ add v0.4s,v0.4s,v24.4s
+ add w9,w9,w24
+ add v4.4s,v4.4s,v24.4s
+ add x10,x10,x24,lsr#32
+ add v8.4s,v8.4s,v24.4s
+ add w11,w11,w25
+ add v12.4s,v12.4s,v24.4s
+ add x12,x12,x25,lsr#32
+ add v16.4s,v16.4s,v24.4s
+ add w13,w13,w26
+ add v20.4s,v20.4s,v24.4s
+ add x14,x14,x26,lsr#32
+ add v2.4s,v2.4s,v26.4s
+ add w15,w15,w27
+ add v6.4s,v6.4s,v26.4s
+ add x16,x16,x27,lsr#32
+ add v10.4s,v10.4s,v26.4s
+ add w17,w17,w28
+ add v14.4s,v14.4s,v26.4s
+ add x19,x19,x28,lsr#32
+ add v18.4s,v18.4s,v26.4s
+ add w20,w20,w30
+ add v22.4s,v22.4s,v26.4s
+ add x21,x21,x30,lsr#32
+ add v19.4s,v19.4s,v31.4s // +4
+ add x5,x5,x6,lsl#32 // pack
+ add v23.4s,v23.4s,v31.4s // +4
+ add x7,x7,x8,lsl#32
+ add v3.4s,v3.4s,v27.4s
+ ldp x6,x8,[x1,#0] // load input
+ add v7.4s,v7.4s,v28.4s
+ add x9,x9,x10,lsl#32
+ add v11.4s,v11.4s,v29.4s
+ add x11,x11,x12,lsl#32
+ add v15.4s,v15.4s,v30.4s
+ ldp x10,x12,[x1,#16]
+ add v19.4s,v19.4s,v27.4s
+ add x13,x13,x14,lsl#32
+ add v23.4s,v23.4s,v28.4s
+ add x15,x15,x16,lsl#32
+ add v1.4s,v1.4s,v25.4s
+ ldp x14,x16,[x1,#32]
+ add v5.4s,v5.4s,v25.4s
+ add x17,x17,x19,lsl#32
+ add v9.4s,v9.4s,v25.4s
+ add x20,x20,x21,lsl#32
+ add v13.4s,v13.4s,v25.4s
+ ldp x19,x21,[x1,#48]
+ add v17.4s,v17.4s,v25.4s
+ add x1,x1,#64
+ add v21.4s,v21.4s,v25.4s
+
+#ifdef __ARMEB__
+ rev x5,x5
+ rev x7,x7
+ rev x9,x9
+ rev x11,x11
+ rev x13,x13
+ rev x15,x15
+ rev x17,x17
+ rev x20,x20
+#endif
+ ld1 {v24.16b,v25.16b,v26.16b,v27.16b},[x1],#64
+ eor x5,x5,x6
+ eor x7,x7,x8
+ eor x9,x9,x10
+ eor x11,x11,x12
+ eor x13,x13,x14
+ eor v0.16b,v0.16b,v24.16b
+ eor x15,x15,x16
+ eor v1.16b,v1.16b,v25.16b
+ eor x17,x17,x19
+ eor v2.16b,v2.16b,v26.16b
+ eor x20,x20,x21
+ eor v3.16b,v3.16b,v27.16b
+ ld1 {v24.16b,v25.16b,v26.16b,v27.16b},[x1],#64
+
+ stp x5,x7,[x0,#0] // store output
+ add x28,x28,#7 // increment counter
+ stp x9,x11,[x0,#16]
+ stp x13,x15,[x0,#32]
+ stp x17,x20,[x0,#48]
+ add x0,x0,#64
+ st1 {v0.16b,v1.16b,v2.16b,v3.16b},[x0],#64
+
+ ld1 {v0.16b,v1.16b,v2.16b,v3.16b},[x1],#64
+ eor v4.16b,v4.16b,v24.16b
+ eor v5.16b,v5.16b,v25.16b
+ eor v6.16b,v6.16b,v26.16b
+ eor v7.16b,v7.16b,v27.16b
+ st1 {v4.16b,v5.16b,v6.16b,v7.16b},[x0],#64
+
+ ld1 {v4.16b,v5.16b,v6.16b,v7.16b},[x1],#64
+ eor v8.16b,v8.16b,v0.16b
+ ldp q24,q25,[sp,#0]
+ eor v9.16b,v9.16b,v1.16b
+ ldp q26,q27,[sp,#32]
+ eor v10.16b,v10.16b,v2.16b
+ eor v11.16b,v11.16b,v3.16b
+ st1 {v8.16b,v9.16b,v10.16b,v11.16b},[x0],#64
+
+ ld1 {v8.16b,v9.16b,v10.16b,v11.16b},[x1],#64
+ eor v12.16b,v12.16b,v4.16b
+ eor v13.16b,v13.16b,v5.16b
+ eor v14.16b,v14.16b,v6.16b
+ eor v15.16b,v15.16b,v7.16b
+ st1 {v12.16b,v13.16b,v14.16b,v15.16b},[x0],#64
+
+ ld1 {v12.16b,v13.16b,v14.16b,v15.16b},[x1],#64
+ eor v16.16b,v16.16b,v8.16b
+ eor v17.16b,v17.16b,v9.16b
+ eor v18.16b,v18.16b,v10.16b
+ eor v19.16b,v19.16b,v11.16b
+ st1 {v16.16b,v17.16b,v18.16b,v19.16b},[x0],#64
+
+ shl v0.4s,v31.4s,#1 // 4 -> 8
+ eor v20.16b,v20.16b,v12.16b
+ eor v21.16b,v21.16b,v13.16b
+ eor v22.16b,v22.16b,v14.16b
+ eor v23.16b,v23.16b,v15.16b
+ st1 {v20.16b,v21.16b,v22.16b,v23.16b},[x0],#64
+
+ add v27.4s,v27.4s,v0.4s // += 8
+ add v28.4s,v28.4s,v0.4s
+ add v29.4s,v29.4s,v0.4s
+ add v30.4s,v30.4s,v0.4s
+
+ b.hs .Loop_outer_512_neon
+
+ adds x2,x2,#512
+ ushr v0.4s,v31.4s,#2 // 4 -> 1
+
+ ldp d8,d9,[sp,#128+0] // meet ABI requirements
+ ldp d10,d11,[sp,#128+16]
+ ldp d12,d13,[sp,#128+32]
+ ldp d14,d15,[sp,#128+48]
+
+ stp q24,q31,[sp,#0] // wipe off-load area
+ stp q24,q31,[sp,#32]
+ stp q24,q31,[sp,#64]
+
+ b.eq .Ldone_512_neon
+
+ cmp x2,#192
+ sub v27.4s,v27.4s,v0.4s // -= 1
+ sub v28.4s,v28.4s,v0.4s
+ sub v29.4s,v29.4s,v0.4s
+ add sp,sp,#128
+ b.hs .Loop_outer_neon
+
+ eor v25.16b,v25.16b,v25.16b
+ eor v26.16b,v26.16b,v26.16b
+ eor v27.16b,v27.16b,v27.16b
+ eor v28.16b,v28.16b,v28.16b
+ eor v29.16b,v29.16b,v29.16b
+ eor v30.16b,v30.16b,v30.16b
+ b .Loop_outer
+
+.Ldone_512_neon:
+ ldp x19,x20,[x29,#16]
+ add sp,sp,#128+64
+ ldp x21,x22,[x29,#32]
+ ldp x23,x24,[x29,#48]
+ ldp x25,x26,[x29,#64]
+ ldp x27,x28,[x29,#80]
+ ldp x29,x30,[sp],#96
+ ret
+.size ChaCha20_512_neon,.-ChaCha20_512_neon
--
2.19.0
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