crypto: x86/chacha20 - refactor to allow varying number of rounds

In preparation for adding XChaCha12 support, rename/refactor the x86_64
SIMD implementations of ChaCha20 to support different numbers of rounds.

Reviewed-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 0 insertions, 1026 deletions

diff --git a/arch/x86/crypto/chacha20-avx2-x86_64.S b/arch/x86/crypto/chacha20-avx2-x86_64.S
deleted file mode 100644
index b6ab082be657..000000000000
--- a/arch/x86/crypto/chacha20-avx2-x86_64.S
+++ /dev/null
@@ -1,1026 +0,0 @@
-/*
- * ChaCha20 256-bit cipher algorithm, RFC7539, x64 AVX2 functions
- *
- * Copyright (C) 2015 Martin Willi
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/linkage.h>
-
-.section	.rodata.cst32.ROT8, "aM", @progbits, 32
-.align 32
-ROT8:	.octa 0x0e0d0c0f0a09080b0605040702010003
-	.octa 0x0e0d0c0f0a09080b0605040702010003
-
-.section	.rodata.cst32.ROT16, "aM", @progbits, 32
-.align 32
-ROT16:	.octa 0x0d0c0f0e09080b0a0504070601000302
-	.octa 0x0d0c0f0e09080b0a0504070601000302
-
-.section	.rodata.cst32.CTRINC, "aM", @progbits, 32
-.align 32
-CTRINC:	.octa 0x00000003000000020000000100000000
-	.octa 0x00000007000000060000000500000004
-
-.section	.rodata.cst32.CTR2BL, "aM", @progbits, 32
-.align 32
-CTR2BL:	.octa 0x00000000000000000000000000000000
-	.octa 0x00000000000000000000000000000001
-
-.section	.rodata.cst32.CTR4BL, "aM", @progbits, 32
-.align 32
-CTR4BL:	.octa 0x00000000000000000000000000000002
-	.octa 0x00000000000000000000000000000003
-
-.text
-
-ENTRY(chacha20_2block_xor_avx2)
-	# %rdi: Input state matrix, s
-	# %rsi: up to 2 data blocks output, o
-	# %rdx: up to 2 data blocks input, i
-	# %rcx: input/output length in bytes
-
-	# This function encrypts two ChaCha20 blocks by loading the state
-	# matrix twice across four AVX registers. It performs matrix operations
-	# on four words in each matrix in parallel, but requires shuffling to
-	# rearrange the words after each round.
-
-	vzeroupper
-
-	# x0..3[0-2] = s0..3
-	vbroadcasti128	0x00(%rdi),%ymm0
-	vbroadcasti128	0x10(%rdi),%ymm1
-	vbroadcasti128	0x20(%rdi),%ymm2
-	vbroadcasti128	0x30(%rdi),%ymm3
-
-	vpaddd		CTR2BL(%rip),%ymm3,%ymm3
-
-	vmovdqa		%ymm0,%ymm8
-	vmovdqa		%ymm1,%ymm9
-	vmovdqa		%ymm2,%ymm10
-	vmovdqa		%ymm3,%ymm11
-
-	vmovdqa		ROT8(%rip),%ymm4
-	vmovdqa		ROT16(%rip),%ymm5
-
-	mov		%rcx,%rax
-	mov		$10,%ecx
-
-.Ldoubleround:
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 16)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm5,%ymm3,%ymm3
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 12)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm6
-	vpslld		$12,%ymm6,%ymm6
-	vpsrld		$20,%ymm1,%ymm1
-	vpor		%ymm6,%ymm1,%ymm1
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 8)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm4,%ymm3,%ymm3
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 7)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm7
-	vpslld		$7,%ymm7,%ymm7
-	vpsrld		$25,%ymm1,%ymm1
-	vpor		%ymm7,%ymm1,%ymm1
-
-	# x1 = shuffle32(x1, MASK(0, 3, 2, 1))
-	vpshufd		$0x39,%ymm1,%ymm1
-	# x2 = shuffle32(x2, MASK(1, 0, 3, 2))
-	vpshufd		$0x4e,%ymm2,%ymm2
-	# x3 = shuffle32(x3, MASK(2, 1, 0, 3))
-	vpshufd		$0x93,%ymm3,%ymm3
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 16)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm5,%ymm3,%ymm3
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 12)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm6
-	vpslld		$12,%ymm6,%ymm6
-	vpsrld		$20,%ymm1,%ymm1
-	vpor		%ymm6,%ymm1,%ymm1
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 8)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm4,%ymm3,%ymm3
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 7)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm7
-	vpslld		$7,%ymm7,%ymm7
-	vpsrld		$25,%ymm1,%ymm1
-	vpor		%ymm7,%ymm1,%ymm1
-
-	# x1 = shuffle32(x1, MASK(2, 1, 0, 3))
-	vpshufd		$0x93,%ymm1,%ymm1
-	# x2 = shuffle32(x2, MASK(1, 0, 3, 2))
-	vpshufd		$0x4e,%ymm2,%ymm2
-	# x3 = shuffle32(x3, MASK(0, 3, 2, 1))
-	vpshufd		$0x39,%ymm3,%ymm3
-
-	dec		%ecx
-	jnz		.Ldoubleround
-
-	# o0 = i0 ^ (x0 + s0)
-	vpaddd		%ymm8,%ymm0,%ymm7
-	cmp		$0x10,%rax
-	jl		.Lxorpart2
-	vpxor		0x00(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x00(%rsi)
-	vextracti128	$1,%ymm7,%xmm0
-	# o1 = i1 ^ (x1 + s1)
-	vpaddd		%ymm9,%ymm1,%ymm7
-	cmp		$0x20,%rax
-	jl		.Lxorpart2
-	vpxor		0x10(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x10(%rsi)
-	vextracti128	$1,%ymm7,%xmm1
-	# o2 = i2 ^ (x2 + s2)
-	vpaddd		%ymm10,%ymm2,%ymm7
-	cmp		$0x30,%rax
-	jl		.Lxorpart2
-	vpxor		0x20(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x20(%rsi)
-	vextracti128	$1,%ymm7,%xmm2
-	# o3 = i3 ^ (x3 + s3)
-	vpaddd		%ymm11,%ymm3,%ymm7
-	cmp		$0x40,%rax
-	jl		.Lxorpart2
-	vpxor		0x30(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x30(%rsi)
-	vextracti128	$1,%ymm7,%xmm3
-
-	# xor and write second block
-	vmovdqa		%xmm0,%xmm7
-	cmp		$0x50,%rax
-	jl		.Lxorpart2
-	vpxor		0x40(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x40(%rsi)
-
-	vmovdqa		%xmm1,%xmm7
-	cmp		$0x60,%rax
-	jl		.Lxorpart2
-	vpxor		0x50(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x50(%rsi)
-
-	vmovdqa		%xmm2,%xmm7
-	cmp		$0x70,%rax
-	jl		.Lxorpart2
-	vpxor		0x60(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x60(%rsi)
-
-	vmovdqa		%xmm3,%xmm7
-	cmp		$0x80,%rax
-	jl		.Lxorpart2
-	vpxor		0x70(%rdx),%xmm7,%xmm6
-	vmovdqu		%xmm6,0x70(%rsi)
-
-.Ldone2:
-	vzeroupper
-	ret
-
-.Lxorpart2:
-	# xor remaining bytes from partial register into output
-	mov		%rax,%r9
-	and		$0x0f,%r9
-	jz		.Ldone2
-	and		$~0x0f,%rax
-
-	mov		%rsi,%r11
-
-	lea		8(%rsp),%r10
-	sub		$0x10,%rsp
-	and		$~31,%rsp
-
-	lea		(%rdx,%rax),%rsi
-	mov		%rsp,%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	vpxor		0x00(%rsp),%xmm7,%xmm7
-	vmovdqa		%xmm7,0x00(%rsp)
-
-	mov		%rsp,%rsi
-	lea		(%r11,%rax),%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	lea		-8(%r10),%rsp
-	jmp		.Ldone2
-
-ENDPROC(chacha20_2block_xor_avx2)
-
-ENTRY(chacha20_4block_xor_avx2)
-	# %rdi: Input state matrix, s
-	# %rsi: up to 4 data blocks output, o
-	# %rdx: up to 4 data blocks input, i
-	# %rcx: input/output length in bytes
-
-	# This function encrypts four ChaCha20 block by loading the state
-	# matrix four times across eight AVX registers. It performs matrix
-	# operations on four words in two matrices in parallel, sequentially
-	# to the operations on the four words of the other two matrices. The
-	# required word shuffling has a rather high latency, we can do the
-	# arithmetic on two matrix-pairs without much slowdown.
-
-	vzeroupper
-
-	# x0..3[0-4] = s0..3
-	vbroadcasti128	0x00(%rdi),%ymm0
-	vbroadcasti128	0x10(%rdi),%ymm1
-	vbroadcasti128	0x20(%rdi),%ymm2
-	vbroadcasti128	0x30(%rdi),%ymm3
-
-	vmovdqa		%ymm0,%ymm4
-	vmovdqa		%ymm1,%ymm5
-	vmovdqa		%ymm2,%ymm6
-	vmovdqa		%ymm3,%ymm7
-
-	vpaddd		CTR2BL(%rip),%ymm3,%ymm3
-	vpaddd		CTR4BL(%rip),%ymm7,%ymm7
-
-	vmovdqa		%ymm0,%ymm11
-	vmovdqa		%ymm1,%ymm12
-	vmovdqa		%ymm2,%ymm13
-	vmovdqa		%ymm3,%ymm14
-	vmovdqa		%ymm7,%ymm15
-
-	vmovdqa		ROT8(%rip),%ymm8
-	vmovdqa		ROT16(%rip),%ymm9
-
-	mov		%rcx,%rax
-	mov		$10,%ecx
-
-.Ldoubleround4:
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 16)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm9,%ymm3,%ymm3
-
-	vpaddd		%ymm5,%ymm4,%ymm4
-	vpxor		%ymm4,%ymm7,%ymm7
-	vpshufb		%ymm9,%ymm7,%ymm7
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 12)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm10
-	vpslld		$12,%ymm10,%ymm10
-	vpsrld		$20,%ymm1,%ymm1
-	vpor		%ymm10,%ymm1,%ymm1
-
-	vpaddd		%ymm7,%ymm6,%ymm6
-	vpxor		%ymm6,%ymm5,%ymm5
-	vmovdqa		%ymm5,%ymm10
-	vpslld		$12,%ymm10,%ymm10
-	vpsrld		$20,%ymm5,%ymm5
-	vpor		%ymm10,%ymm5,%ymm5
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 8)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm8,%ymm3,%ymm3
-
-	vpaddd		%ymm5,%ymm4,%ymm4
-	vpxor		%ymm4,%ymm7,%ymm7
-	vpshufb		%ymm8,%ymm7,%ymm7
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 7)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm10
-	vpslld		$7,%ymm10,%ymm10
-	vpsrld		$25,%ymm1,%ymm1
-	vpor		%ymm10,%ymm1,%ymm1
-
-	vpaddd		%ymm7,%ymm6,%ymm6
-	vpxor		%ymm6,%ymm5,%ymm5
-	vmovdqa		%ymm5,%ymm10
-	vpslld		$7,%ymm10,%ymm10
-	vpsrld		$25,%ymm5,%ymm5
-	vpor		%ymm10,%ymm5,%ymm5
-
-	# x1 = shuffle32(x1, MASK(0, 3, 2, 1))
-	vpshufd		$0x39,%ymm1,%ymm1
-	vpshufd		$0x39,%ymm5,%ymm5
-	# x2 = shuffle32(x2, MASK(1, 0, 3, 2))
-	vpshufd		$0x4e,%ymm2,%ymm2
-	vpshufd		$0x4e,%ymm6,%ymm6
-	# x3 = shuffle32(x3, MASK(2, 1, 0, 3))
-	vpshufd		$0x93,%ymm3,%ymm3
-	vpshufd		$0x93,%ymm7,%ymm7
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 16)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm9,%ymm3,%ymm3
-
-	vpaddd		%ymm5,%ymm4,%ymm4
-	vpxor		%ymm4,%ymm7,%ymm7
-	vpshufb		%ymm9,%ymm7,%ymm7
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 12)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm10
-	vpslld		$12,%ymm10,%ymm10
-	vpsrld		$20,%ymm1,%ymm1
-	vpor		%ymm10,%ymm1,%ymm1
-
-	vpaddd		%ymm7,%ymm6,%ymm6
-	vpxor		%ymm6,%ymm5,%ymm5
-	vmovdqa		%ymm5,%ymm10
-	vpslld		$12,%ymm10,%ymm10
-	vpsrld		$20,%ymm5,%ymm5
-	vpor		%ymm10,%ymm5,%ymm5
-
-	# x0 += x1, x3 = rotl32(x3 ^ x0, 8)
-	vpaddd		%ymm1,%ymm0,%ymm0
-	vpxor		%ymm0,%ymm3,%ymm3
-	vpshufb		%ymm8,%ymm3,%ymm3
-
-	vpaddd		%ymm5,%ymm4,%ymm4
-	vpxor		%ymm4,%ymm7,%ymm7
-	vpshufb		%ymm8,%ymm7,%ymm7
-
-	# x2 += x3, x1 = rotl32(x1 ^ x2, 7)
-	vpaddd		%ymm3,%ymm2,%ymm2
-	vpxor		%ymm2,%ymm1,%ymm1
-	vmovdqa		%ymm1,%ymm10
-	vpslld		$7,%ymm10,%ymm10
-	vpsrld		$25,%ymm1,%ymm1
-	vpor		%ymm10,%ymm1,%ymm1
-
-	vpaddd		%ymm7,%ymm6,%ymm6
-	vpxor		%ymm6,%ymm5,%ymm5
-	vmovdqa		%ymm5,%ymm10
-	vpslld		$7,%ymm10,%ymm10
-	vpsrld		$25,%ymm5,%ymm5
-	vpor		%ymm10,%ymm5,%ymm5
-
-	# x1 = shuffle32(x1, MASK(2, 1, 0, 3))
-	vpshufd		$0x93,%ymm1,%ymm1
-	vpshufd		$0x93,%ymm5,%ymm5
-	# x2 = shuffle32(x2, MASK(1, 0, 3, 2))
-	vpshufd		$0x4e,%ymm2,%ymm2
-	vpshufd		$0x4e,%ymm6,%ymm6
-	# x3 = shuffle32(x3, MASK(0, 3, 2, 1))
-	vpshufd		$0x39,%ymm3,%ymm3
-	vpshufd		$0x39,%ymm7,%ymm7
-
-	dec		%ecx
-	jnz		.Ldoubleround4
-
-	# o0 = i0 ^ (x0 + s0), first block
-	vpaddd		%ymm11,%ymm0,%ymm10
-	cmp		$0x10,%rax
-	jl		.Lxorpart4
-	vpxor		0x00(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x00(%rsi)
-	vextracti128	$1,%ymm10,%xmm0
-	# o1 = i1 ^ (x1 + s1), first block
-	vpaddd		%ymm12,%ymm1,%ymm10
-	cmp		$0x20,%rax
-	jl		.Lxorpart4
-	vpxor		0x10(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x10(%rsi)
-	vextracti128	$1,%ymm10,%xmm1
-	# o2 = i2 ^ (x2 + s2), first block
-	vpaddd		%ymm13,%ymm2,%ymm10
-	cmp		$0x30,%rax
-	jl		.Lxorpart4
-	vpxor		0x20(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x20(%rsi)
-	vextracti128	$1,%ymm10,%xmm2
-	# o3 = i3 ^ (x3 + s3), first block
-	vpaddd		%ymm14,%ymm3,%ymm10
-	cmp		$0x40,%rax
-	jl		.Lxorpart4
-	vpxor		0x30(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x30(%rsi)
-	vextracti128	$1,%ymm10,%xmm3
-
-	# xor and write second block
-	vmovdqa		%xmm0,%xmm10
-	cmp		$0x50,%rax
-	jl		.Lxorpart4
-	vpxor		0x40(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x40(%rsi)
-
-	vmovdqa		%xmm1,%xmm10
-	cmp		$0x60,%rax
-	jl		.Lxorpart4
-	vpxor		0x50(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x50(%rsi)
-
-	vmovdqa		%xmm2,%xmm10
-	cmp		$0x70,%rax
-	jl		.Lxorpart4
-	vpxor		0x60(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x60(%rsi)
-
-	vmovdqa		%xmm3,%xmm10
-	cmp		$0x80,%rax
-	jl		.Lxorpart4
-	vpxor		0x70(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x70(%rsi)
-
-	# o0 = i0 ^ (x0 + s0), third block
-	vpaddd		%ymm11,%ymm4,%ymm10
-	cmp		$0x90,%rax
-	jl		.Lxorpart4
-	vpxor		0x80(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x80(%rsi)
-	vextracti128	$1,%ymm10,%xmm4
-	# o1 = i1 ^ (x1 + s1), third block
-	vpaddd		%ymm12,%ymm5,%ymm10
-	cmp		$0xa0,%rax
-	jl		.Lxorpart4
-	vpxor		0x90(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0x90(%rsi)
-	vextracti128	$1,%ymm10,%xmm5
-	# o2 = i2 ^ (x2 + s2), third block
-	vpaddd		%ymm13,%ymm6,%ymm10
-	cmp		$0xb0,%rax
-	jl		.Lxorpart4
-	vpxor		0xa0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xa0(%rsi)
-	vextracti128	$1,%ymm10,%xmm6
-	# o3 = i3 ^ (x3 + s3), third block
-	vpaddd		%ymm15,%ymm7,%ymm10
-	cmp		$0xc0,%rax
-	jl		.Lxorpart4
-	vpxor		0xb0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xb0(%rsi)
-	vextracti128	$1,%ymm10,%xmm7
-
-	# xor and write fourth block
-	vmovdqa		%xmm4,%xmm10
-	cmp		$0xd0,%rax
-	jl		.Lxorpart4
-	vpxor		0xc0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xc0(%rsi)
-
-	vmovdqa		%xmm5,%xmm10
-	cmp		$0xe0,%rax
-	jl		.Lxorpart4
-	vpxor		0xd0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xd0(%rsi)
-
-	vmovdqa		%xmm6,%xmm10
-	cmp		$0xf0,%rax
-	jl		.Lxorpart4
-	vpxor		0xe0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xe0(%rsi)
-
-	vmovdqa		%xmm7,%xmm10
-	cmp		$0x100,%rax
-	jl		.Lxorpart4
-	vpxor		0xf0(%rdx),%xmm10,%xmm9
-	vmovdqu		%xmm9,0xf0(%rsi)
-
-.Ldone4:
-	vzeroupper
-	ret
-
-.Lxorpart4:
-	# xor remaining bytes from partial register into output
-	mov		%rax,%r9
-	and		$0x0f,%r9
-	jz		.Ldone4
-	and		$~0x0f,%rax
-
-	mov		%rsi,%r11
-
-	lea		8(%rsp),%r10
-	sub		$0x10,%rsp
-	and		$~31,%rsp
-
-	lea		(%rdx,%rax),%rsi
-	mov		%rsp,%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	vpxor		0x00(%rsp),%xmm10,%xmm10
-	vmovdqa		%xmm10,0x00(%rsp)
-
-	mov		%rsp,%rsi
-	lea		(%r11,%rax),%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	lea		-8(%r10),%rsp
-	jmp		.Ldone4
-
-ENDPROC(chacha20_4block_xor_avx2)
-
-ENTRY(chacha20_8block_xor_avx2)
-	# %rdi: Input state matrix, s
-	# %rsi: up to 8 data blocks output, o
-	# %rdx: up to 8 data blocks input, i
-	# %rcx: input/output length in bytes
-
-	# This function encrypts eight consecutive ChaCha20 blocks by loading
-	# the state matrix in AVX registers eight times. As we need some
-	# scratch registers, we save the first four registers on the stack. The
-	# algorithm performs each operation on the corresponding word of each
-	# state matrix, hence requires no word shuffling. For final XORing step
-	# we transpose the matrix by interleaving 32-, 64- and then 128-bit
-	# words, which allows us to do XOR in AVX registers. 8/16-bit word
-	# rotation is done with the slightly better performing byte shuffling,
-	# 7/12-bit word rotation uses traditional shift+OR.
-
-	vzeroupper
-	# 4 * 32 byte stack, 32-byte aligned
-	lea		8(%rsp),%r10
-	and		$~31, %rsp
-	sub		$0x80, %rsp
-	mov		%rcx,%rax
-
-	# x0..15[0-7] = s[0..15]
-	vpbroadcastd	0x00(%rdi),%ymm0
-	vpbroadcastd	0x04(%rdi),%ymm1
-	vpbroadcastd	0x08(%rdi),%ymm2
-	vpbroadcastd	0x0c(%rdi),%ymm3
-	vpbroadcastd	0x10(%rdi),%ymm4
-	vpbroadcastd	0x14(%rdi),%ymm5
-	vpbroadcastd	0x18(%rdi),%ymm6
-	vpbroadcastd	0x1c(%rdi),%ymm7
-	vpbroadcastd	0x20(%rdi),%ymm8
-	vpbroadcastd	0x24(%rdi),%ymm9
-	vpbroadcastd	0x28(%rdi),%ymm10
-	vpbroadcastd	0x2c(%rdi),%ymm11
-	vpbroadcastd	0x30(%rdi),%ymm12
-	vpbroadcastd	0x34(%rdi),%ymm13
-	vpbroadcastd	0x38(%rdi),%ymm14
-	vpbroadcastd	0x3c(%rdi),%ymm15
-	# x0..3 on stack
-	vmovdqa		%ymm0,0x00(%rsp)
-	vmovdqa		%ymm1,0x20(%rsp)
-	vmovdqa		%ymm2,0x40(%rsp)
-	vmovdqa		%ymm3,0x60(%rsp)
-
-	vmovdqa		CTRINC(%rip),%ymm1
-	vmovdqa		ROT8(%rip),%ymm2
-	vmovdqa		ROT16(%rip),%ymm3
-
-	# x12 += counter values 0-3
-	vpaddd		%ymm1,%ymm12,%ymm12
-
-	mov		$10,%ecx
-
-.Ldoubleround8:
-	# x0 += x4, x12 = rotl32(x12 ^ x0, 16)
-	vpaddd		0x00(%rsp),%ymm4,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-	vpxor		%ymm0,%ymm12,%ymm12
-	vpshufb		%ymm3,%ymm12,%ymm12
-	# x1 += x5, x13 = rotl32(x13 ^ x1, 16)
-	vpaddd		0x20(%rsp),%ymm5,%ymm0
-	vmovdqa		%ymm0,0x20(%rsp)
-	vpxor		%ymm0,%ymm13,%ymm13
-	vpshufb		%ymm3,%ymm13,%ymm13
-	# x2 += x6, x14 = rotl32(x14 ^ x2, 16)
-	vpaddd		0x40(%rsp),%ymm6,%ymm0
-	vmovdqa		%ymm0,0x40(%rsp)
-	vpxor		%ymm0,%ymm14,%ymm14
-	vpshufb		%ymm3,%ymm14,%ymm14
-	# x3 += x7, x15 = rotl32(x15 ^ x3, 16)
-	vpaddd		0x60(%rsp),%ymm7,%ymm0
-	vmovdqa		%ymm0,0x60(%rsp)
-	vpxor		%ymm0,%ymm15,%ymm15
-	vpshufb		%ymm3,%ymm15,%ymm15
-
-	# x8 += x12, x4 = rotl32(x4 ^ x8, 12)
-	vpaddd		%ymm12,%ymm8,%ymm8
-	vpxor		%ymm8,%ymm4,%ymm4
-	vpslld		$12,%ymm4,%ymm0
-	vpsrld		$20,%ymm4,%ymm4
-	vpor		%ymm0,%ymm4,%ymm4
-	# x9 += x13, x5 = rotl32(x5 ^ x9, 12)
-	vpaddd		%ymm13,%ymm9,%ymm9
-	vpxor		%ymm9,%ymm5,%ymm5
-	vpslld		$12,%ymm5,%ymm0
-	vpsrld		$20,%ymm5,%ymm5
-	vpor		%ymm0,%ymm5,%ymm5
-	# x10 += x14, x6 = rotl32(x6 ^ x10, 12)
-	vpaddd		%ymm14,%ymm10,%ymm10
-	vpxor		%ymm10,%ymm6,%ymm6
-	vpslld		$12,%ymm6,%ymm0
-	vpsrld		$20,%ymm6,%ymm6
-	vpor		%ymm0,%ymm6,%ymm6
-	# x11 += x15, x7 = rotl32(x7 ^ x11, 12)
-	vpaddd		%ymm15,%ymm11,%ymm11
-	vpxor		%ymm11,%ymm7,%ymm7
-	vpslld		$12,%ymm7,%ymm0
-	vpsrld		$20,%ymm7,%ymm7
-	vpor		%ymm0,%ymm7,%ymm7
-
-	# x0 += x4, x12 = rotl32(x12 ^ x0, 8)
-	vpaddd		0x00(%rsp),%ymm4,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-	vpxor		%ymm0,%ymm12,%ymm12
-	vpshufb		%ymm2,%ymm12,%ymm12
-	# x1 += x5, x13 = rotl32(x13 ^ x1, 8)
-	vpaddd		0x20(%rsp),%ymm5,%ymm0
-	vmovdqa		%ymm0,0x20(%rsp)
-	vpxor		%ymm0,%ymm13,%ymm13
-	vpshufb		%ymm2,%ymm13,%ymm13
-	# x2 += x6, x14 = rotl32(x14 ^ x2, 8)
-	vpaddd		0x40(%rsp),%ymm6,%ymm0
-	vmovdqa		%ymm0,0x40(%rsp)
-	vpxor		%ymm0,%ymm14,%ymm14
-	vpshufb		%ymm2,%ymm14,%ymm14
-	# x3 += x7, x15 = rotl32(x15 ^ x3, 8)
-	vpaddd		0x60(%rsp),%ymm7,%ymm0
-	vmovdqa		%ymm0,0x60(%rsp)
-	vpxor		%ymm0,%ymm15,%ymm15
-	vpshufb		%ymm2,%ymm15,%ymm15
-
-	# x8 += x12, x4 = rotl32(x4 ^ x8, 7)
-	vpaddd		%ymm12,%ymm8,%ymm8
-	vpxor		%ymm8,%ymm4,%ymm4
-	vpslld		$7,%ymm4,%ymm0
-	vpsrld		$25,%ymm4,%ymm4
-	vpor		%ymm0,%ymm4,%ymm4
-	# x9 += x13, x5 = rotl32(x5 ^ x9, 7)
-	vpaddd		%ymm13,%ymm9,%ymm9
-	vpxor		%ymm9,%ymm5,%ymm5
-	vpslld		$7,%ymm5,%ymm0
-	vpsrld		$25,%ymm5,%ymm5
-	vpor		%ymm0,%ymm5,%ymm5
-	# x10 += x14, x6 = rotl32(x6 ^ x10, 7)
-	vpaddd		%ymm14,%ymm10,%ymm10
-	vpxor		%ymm10,%ymm6,%ymm6
-	vpslld		$7,%ymm6,%ymm0
-	vpsrld		$25,%ymm6,%ymm6
-	vpor		%ymm0,%ymm6,%ymm6
-	# x11 += x15, x7 = rotl32(x7 ^ x11, 7)
-	vpaddd		%ymm15,%ymm11,%ymm11
-	vpxor		%ymm11,%ymm7,%ymm7
-	vpslld		$7,%ymm7,%ymm0
-	vpsrld		$25,%ymm7,%ymm7
-	vpor		%ymm0,%ymm7,%ymm7
-
-	# x0 += x5, x15 = rotl32(x15 ^ x0, 16)
-	vpaddd		0x00(%rsp),%ymm5,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-	vpxor		%ymm0,%ymm15,%ymm15
-	vpshufb		%ymm3,%ymm15,%ymm15
-	# x1 += x6, x12 = rotl32(x12 ^ x1, 16)%ymm0
-	vpaddd		0x20(%rsp),%ymm6,%ymm0
-	vmovdqa		%ymm0,0x20(%rsp)
-	vpxor		%ymm0,%ymm12,%ymm12
-	vpshufb		%ymm3,%ymm12,%ymm12
-	# x2 += x7, x13 = rotl32(x13 ^ x2, 16)
-	vpaddd		0x40(%rsp),%ymm7,%ymm0
-	vmovdqa		%ymm0,0x40(%rsp)
-	vpxor		%ymm0,%ymm13,%ymm13
-	vpshufb		%ymm3,%ymm13,%ymm13
-	# x3 += x4, x14 = rotl32(x14 ^ x3, 16)
-	vpaddd		0x60(%rsp),%ymm4,%ymm0
-	vmovdqa		%ymm0,0x60(%rsp)
-	vpxor		%ymm0,%ymm14,%ymm14
-	vpshufb		%ymm3,%ymm14,%ymm14
-
-	# x10 += x15, x5 = rotl32(x5 ^ x10, 12)
-	vpaddd		%ymm15,%ymm10,%ymm10
-	vpxor		%ymm10,%ymm5,%ymm5
-	vpslld		$12,%ymm5,%ymm0
-	vpsrld		$20,%ymm5,%ymm5
-	vpor		%ymm0,%ymm5,%ymm5
-	# x11 += x12, x6 = rotl32(x6 ^ x11, 12)
-	vpaddd		%ymm12,%ymm11,%ymm11
-	vpxor		%ymm11,%ymm6,%ymm6
-	vpslld		$12,%ymm6,%ymm0
-	vpsrld		$20,%ymm6,%ymm6
-	vpor		%ymm0,%ymm6,%ymm6
-	# x8 += x13, x7 = rotl32(x7 ^ x8, 12)
-	vpaddd		%ymm13,%ymm8,%ymm8
-	vpxor		%ymm8,%ymm7,%ymm7
-	vpslld		$12,%ymm7,%ymm0
-	vpsrld		$20,%ymm7,%ymm7
-	vpor		%ymm0,%ymm7,%ymm7
-	# x9 += x14, x4 = rotl32(x4 ^ x9, 12)
-	vpaddd		%ymm14,%ymm9,%ymm9
-	vpxor		%ymm9,%ymm4,%ymm4
-	vpslld		$12,%ymm4,%ymm0
-	vpsrld		$20,%ymm4,%ymm4
-	vpor		%ymm0,%ymm4,%ymm4
-
-	# x0 += x5, x15 = rotl32(x15 ^ x0, 8)
-	vpaddd		0x00(%rsp),%ymm5,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-	vpxor		%ymm0,%ymm15,%ymm15
-	vpshufb		%ymm2,%ymm15,%ymm15
-	# x1 += x6, x12 = rotl32(x12 ^ x1, 8)
-	vpaddd		0x20(%rsp),%ymm6,%ymm0
-	vmovdqa		%ymm0,0x20(%rsp)
-	vpxor		%ymm0,%ymm12,%ymm12
-	vpshufb		%ymm2,%ymm12,%ymm12
-	# x2 += x7, x13 = rotl32(x13 ^ x2, 8)
-	vpaddd		0x40(%rsp),%ymm7,%ymm0
-	vmovdqa		%ymm0,0x40(%rsp)
-	vpxor		%ymm0,%ymm13,%ymm13
-	vpshufb		%ymm2,%ymm13,%ymm13
-	# x3 += x4, x14 = rotl32(x14 ^ x3, 8)
-	vpaddd		0x60(%rsp),%ymm4,%ymm0
-	vmovdqa		%ymm0,0x60(%rsp)
-	vpxor		%ymm0,%ymm14,%ymm14
-	vpshufb		%ymm2,%ymm14,%ymm14
-
-	# x10 += x15, x5 = rotl32(x5 ^ x10, 7)
-	vpaddd		%ymm15,%ymm10,%ymm10
-	vpxor		%ymm10,%ymm5,%ymm5
-	vpslld		$7,%ymm5,%ymm0
-	vpsrld		$25,%ymm5,%ymm5
-	vpor		%ymm0,%ymm5,%ymm5
-	# x11 += x12, x6 = rotl32(x6 ^ x11, 7)
-	vpaddd		%ymm12,%ymm11,%ymm11
-	vpxor		%ymm11,%ymm6,%ymm6
-	vpslld		$7,%ymm6,%ymm0
-	vpsrld		$25,%ymm6,%ymm6
-	vpor		%ymm0,%ymm6,%ymm6
-	# x8 += x13, x7 = rotl32(x7 ^ x8, 7)
-	vpaddd		%ymm13,%ymm8,%ymm8
-	vpxor		%ymm8,%ymm7,%ymm7
-	vpslld		$7,%ymm7,%ymm0
-	vpsrld		$25,%ymm7,%ymm7
-	vpor		%ymm0,%ymm7,%ymm7
-	# x9 += x14, x4 = rotl32(x4 ^ x9, 7)
-	vpaddd		%ymm14,%ymm9,%ymm9
-	vpxor		%ymm9,%ymm4,%ymm4
-	vpslld		$7,%ymm4,%ymm0
-	vpsrld		$25,%ymm4,%ymm4
-	vpor		%ymm0,%ymm4,%ymm4
-
-	dec		%ecx
-	jnz		.Ldoubleround8
-
-	# x0..15[0-3] += s[0..15]
-	vpbroadcastd	0x00(%rdi),%ymm0
-	vpaddd		0x00(%rsp),%ymm0,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-	vpbroadcastd	0x04(%rdi),%ymm0
-	vpaddd		0x20(%rsp),%ymm0,%ymm0
-	vmovdqa		%ymm0,0x20(%rsp)
-	vpbroadcastd	0x08(%rdi),%ymm0
-	vpaddd		0x40(%rsp),%ymm0,%ymm0
-	vmovdqa		%ymm0,0x40(%rsp)
-	vpbroadcastd	0x0c(%rdi),%ymm0
-	vpaddd		0x60(%rsp),%ymm0,%ymm0
-	vmovdqa		%ymm0,0x60(%rsp)
-	vpbroadcastd	0x10(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm4,%ymm4
-	vpbroadcastd	0x14(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm5,%ymm5
-	vpbroadcastd	0x18(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm6,%ymm6
-	vpbroadcastd	0x1c(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm7,%ymm7
-	vpbroadcastd	0x20(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm8,%ymm8
-	vpbroadcastd	0x24(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm9,%ymm9
-	vpbroadcastd	0x28(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm10,%ymm10
-	vpbroadcastd	0x2c(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm11,%ymm11
-	vpbroadcastd	0x30(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm12,%ymm12
-	vpbroadcastd	0x34(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm13,%ymm13
-	vpbroadcastd	0x38(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm14,%ymm14
-	vpbroadcastd	0x3c(%rdi),%ymm0
-	vpaddd		%ymm0,%ymm15,%ymm15
-
-	# x12 += counter values 0-3
-	vpaddd		%ymm1,%ymm12,%ymm12
-
-	# interleave 32-bit words in state n, n+1
-	vmovdqa		0x00(%rsp),%ymm0
-	vmovdqa		0x20(%rsp),%ymm1
-	vpunpckldq	%ymm1,%ymm0,%ymm2
-	vpunpckhdq	%ymm1,%ymm0,%ymm1
-	vmovdqa		%ymm2,0x00(%rsp)
-	vmovdqa		%ymm1,0x20(%rsp)
-	vmovdqa		0x40(%rsp),%ymm0
-	vmovdqa		0x60(%rsp),%ymm1
-	vpunpckldq	%ymm1,%ymm0,%ymm2
-	vpunpckhdq	%ymm1,%ymm0,%ymm1
-	vmovdqa		%ymm2,0x40(%rsp)
-	vmovdqa		%ymm1,0x60(%rsp)
-	vmovdqa		%ymm4,%ymm0
-	vpunpckldq	%ymm5,%ymm0,%ymm4
-	vpunpckhdq	%ymm5,%ymm0,%ymm5
-	vmovdqa		%ymm6,%ymm0
-	vpunpckldq	%ymm7,%ymm0,%ymm6
-	vpunpckhdq	%ymm7,%ymm0,%ymm7
-	vmovdqa		%ymm8,%ymm0
-	vpunpckldq	%ymm9,%ymm0,%ymm8
-	vpunpckhdq	%ymm9,%ymm0,%ymm9
-	vmovdqa		%ymm10,%ymm0
-	vpunpckldq	%ymm11,%ymm0,%ymm10
-	vpunpckhdq	%ymm11,%ymm0,%ymm11
-	vmovdqa		%ymm12,%ymm0
-	vpunpckldq	%ymm13,%ymm0,%ymm12
-	vpunpckhdq	%ymm13,%ymm0,%ymm13
-	vmovdqa		%ymm14,%ymm0
-	vpunpckldq	%ymm15,%ymm0,%ymm14
-	vpunpckhdq	%ymm15,%ymm0,%ymm15
-
-	# interleave 64-bit words in state n, n+2
-	vmovdqa		0x00(%rsp),%ymm0
-	vmovdqa		0x40(%rsp),%ymm2
-	vpunpcklqdq	%ymm2,%ymm0,%ymm1
-	vpunpckhqdq	%ymm2,%ymm0,%ymm2
-	vmovdqa		%ymm1,0x00(%rsp)
-	vmovdqa		%ymm2,0x40(%rsp)
-	vmovdqa		0x20(%rsp),%ymm0
-	vmovdqa		0x60(%rsp),%ymm2
-	vpunpcklqdq	%ymm2,%ymm0,%ymm1
-	vpunpckhqdq	%ymm2,%ymm0,%ymm2
-	vmovdqa		%ymm1,0x20(%rsp)
-	vmovdqa		%ymm2,0x60(%rsp)
-	vmovdqa		%ymm4,%ymm0
-	vpunpcklqdq	%ymm6,%ymm0,%ymm4
-	vpunpckhqdq	%ymm6,%ymm0,%ymm6
-	vmovdqa		%ymm5,%ymm0
-	vpunpcklqdq	%ymm7,%ymm0,%ymm5
-	vpunpckhqdq	%ymm7,%ymm0,%ymm7
-	vmovdqa		%ymm8,%ymm0
-	vpunpcklqdq	%ymm10,%ymm0,%ymm8
-	vpunpckhqdq	%ymm10,%ymm0,%ymm10
-	vmovdqa		%ymm9,%ymm0
-	vpunpcklqdq	%ymm11,%ymm0,%ymm9
-	vpunpckhqdq	%ymm11,%ymm0,%ymm11
-	vmovdqa		%ymm12,%ymm0
-	vpunpcklqdq	%ymm14,%ymm0,%ymm12
-	vpunpckhqdq	%ymm14,%ymm0,%ymm14
-	vmovdqa		%ymm13,%ymm0
-	vpunpcklqdq	%ymm15,%ymm0,%ymm13
-	vpunpckhqdq	%ymm15,%ymm0,%ymm15
-
-	# interleave 128-bit words in state n, n+4
-	# xor/write first four blocks
-	vmovdqa		0x00(%rsp),%ymm1
-	vperm2i128	$0x20,%ymm4,%ymm1,%ymm0
-	cmp		$0x0020,%rax
-	jl		.Lxorpart8
-	vpxor		0x0000(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0000(%rsi)
-	vperm2i128	$0x31,%ymm4,%ymm1,%ymm4
-
-	vperm2i128	$0x20,%ymm12,%ymm8,%ymm0
-	cmp		$0x0040,%rax
-	jl		.Lxorpart8
-	vpxor		0x0020(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0020(%rsi)
-	vperm2i128	$0x31,%ymm12,%ymm8,%ymm12
-
-	vmovdqa		0x40(%rsp),%ymm1
-	vperm2i128	$0x20,%ymm6,%ymm1,%ymm0
-	cmp		$0x0060,%rax
-	jl		.Lxorpart8
-	vpxor		0x0040(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0040(%rsi)
-	vperm2i128	$0x31,%ymm6,%ymm1,%ymm6
-
-	vperm2i128	$0x20,%ymm14,%ymm10,%ymm0
-	cmp		$0x0080,%rax
-	jl		.Lxorpart8
-	vpxor		0x0060(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0060(%rsi)
-	vperm2i128	$0x31,%ymm14,%ymm10,%ymm14
-
-	vmovdqa		0x20(%rsp),%ymm1
-	vperm2i128	$0x20,%ymm5,%ymm1,%ymm0
-	cmp		$0x00a0,%rax
-	jl		.Lxorpart8
-	vpxor		0x0080(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0080(%rsi)
-	vperm2i128	$0x31,%ymm5,%ymm1,%ymm5
-
-	vperm2i128	$0x20,%ymm13,%ymm9,%ymm0
-	cmp		$0x00c0,%rax
-	jl		.Lxorpart8
-	vpxor		0x00a0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x00a0(%rsi)
-	vperm2i128	$0x31,%ymm13,%ymm9,%ymm13
-
-	vmovdqa		0x60(%rsp),%ymm1
-	vperm2i128	$0x20,%ymm7,%ymm1,%ymm0
-	cmp		$0x00e0,%rax
-	jl		.Lxorpart8
-	vpxor		0x00c0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x00c0(%rsi)
-	vperm2i128	$0x31,%ymm7,%ymm1,%ymm7
-
-	vperm2i128	$0x20,%ymm15,%ymm11,%ymm0
-	cmp		$0x0100,%rax
-	jl		.Lxorpart8
-	vpxor		0x00e0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x00e0(%rsi)
-	vperm2i128	$0x31,%ymm15,%ymm11,%ymm15
-
-	# xor remaining blocks, write to output
-	vmovdqa		%ymm4,%ymm0
-	cmp		$0x0120,%rax
-	jl		.Lxorpart8
-	vpxor		0x0100(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0100(%rsi)
-
-	vmovdqa		%ymm12,%ymm0
-	cmp		$0x0140,%rax
-	jl		.Lxorpart8
-	vpxor		0x0120(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0120(%rsi)
-
-	vmovdqa		%ymm6,%ymm0
-	cmp		$0x0160,%rax
-	jl		.Lxorpart8
-	vpxor		0x0140(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0140(%rsi)
-
-	vmovdqa		%ymm14,%ymm0
-	cmp		$0x0180,%rax
-	jl		.Lxorpart8
-	vpxor		0x0160(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0160(%rsi)
-
-	vmovdqa		%ymm5,%ymm0
-	cmp		$0x01a0,%rax
-	jl		.Lxorpart8
-	vpxor		0x0180(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x0180(%rsi)
-
-	vmovdqa		%ymm13,%ymm0
-	cmp		$0x01c0,%rax
-	jl		.Lxorpart8
-	vpxor		0x01a0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x01a0(%rsi)
-
-	vmovdqa		%ymm7,%ymm0
-	cmp		$0x01e0,%rax
-	jl		.Lxorpart8
-	vpxor		0x01c0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x01c0(%rsi)
-
-	vmovdqa		%ymm15,%ymm0
-	cmp		$0x0200,%rax
-	jl		.Lxorpart8
-	vpxor		0x01e0(%rdx),%ymm0,%ymm0
-	vmovdqu		%ymm0,0x01e0(%rsi)
-
-.Ldone8:
-	vzeroupper
-	lea		-8(%r10),%rsp
-	ret
-
-.Lxorpart8:
-	# xor remaining bytes from partial register into output
-	mov		%rax,%r9
-	and		$0x1f,%r9
-	jz		.Ldone8
-	and		$~0x1f,%rax
-
-	mov		%rsi,%r11
-
-	lea		(%rdx,%rax),%rsi
-	mov		%rsp,%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	vpxor		0x00(%rsp),%ymm0,%ymm0
-	vmovdqa		%ymm0,0x00(%rsp)
-
-	mov		%rsp,%rsi
-	lea		(%r11,%rax),%rdi
-	mov		%r9,%rcx
-	rep movsb
-
-	jmp		.Ldone8
-
-ENDPROC(chacha20_8block_xor_avx2)