These NEON and non-NEON implementations come from Andy Polyakov's implementation. They are exactly the same as Andy Polyakov's original, with the following exceptions: - Entries and exits use the proper kernel convention macro. - CPU feature checking is done in C by the glue code, so that has been removed from the assembly. - The function names have been renamed to fit kernel conventions. - Labels have been renamed (prefixed with .L) to fit kernel conventions. - Constants have been rearranged so that they are closer to the code that is using them. [ARM only] - The neon code can jump to the scalar code when it makes sense to do so. - The neon_512 function as a separate function has been removed, leaving the decision up to the main neon entry point. [ARM64 only] After '/^#/d;/^\..*[^:]$/d', the code has the following diff in actual instructions from the original. ARM: -ChaCha20_ctr32: -.LChaCha20_ctr32: +ENTRY(chacha20_arm) ldr r12,[sp,#0] @ pull pointer to counter and nonce stmdb sp!,{r0-r2,r4-r11,lr} - sub r14,pc,#16 @ ChaCha20_ctr32 - adr r14,.LChaCha20_ctr32 cmp r2,#0 @ len==0? itt eq addeq sp,sp,#4*3 - beq .Lno_data - cmp r2,#192 @ test len - bls .Lshort - ldr r4,[r14,#-32] - ldr r4,[r14,r4] - ldr r4,[r4] - tst r4,#ARMV7_NEON - bne .LChaCha20_neon + beq .Lno_data_arm .Lshort: ldmia r12,{r4-r7} @ load counter and nonce sub sp,sp,#4*(16) @ off-load area - sub r14,r14,#64 @ .Lsigma + sub r14,pc,#100 @ .Lsigma + adr r14,.Lsigma @ .Lsigma stmdb sp!,{r4-r7} @ copy counter and nonce ldmia r3,{r4-r11} @ load key ldmia r14,{r0-r3} @ load sigma @@ -617,14 +615,25 @@ .Ldone: add sp,sp,#4*(32+3) -.Lno_data: +.Lno_data_arm: ldmia sp!,{r4-r11,pc} +ENDPROC(chacha20_arm) -ChaCha20_neon: +ENTRY(chacha20_neon) ldr r12,[sp,#0] @ pull pointer to counter and nonce stmdb sp!,{r0-r2,r4-r11,lr} -.LChaCha20_neon: - adr r14,.Lsigma + cmp r2,#0 @ len==0? + itt eq + addeq sp,sp,#4*3 + beq .Lno_data_neon + cmp r2,#192 @ test len + bls .Lshort +.Lchacha20_neon_begin: + adr r14,.Lsigma2 vstmdb sp!,{d8-d15} @ ABI spec says so stmdb sp!,{r0-r3} @@ -1265,4 +1274,6 @@ add sp,sp,#4*(32+4) vldmia sp,{d8-d15} add sp,sp,#4*(16+3) +.Lno_data_neon: ldmia sp!,{r4-r11,pc} +ENDPROC(chacha20_neon) ARM64: -ChaCha20_ctr32: +ENTRY(chacha20_arm) cbz x2,.Labort - adr x5,.LOPENSSL_armcap_P - cmp x2,#192 - b.lo .Lshort - ldrsw x6,[x5] - ldr x6,[x5] - ldr w17,[x6,x5] - tst w17,#ARMV7_NEON - b.ne ChaCha20_neon - .Lshort: stp x29,x30,[sp,#-96]! add x29,sp,#0 @@ -279,8 +274,13 @@ ldp x27,x28,[x29,#80] ldp x29,x30,[sp],#96 ret +ENDPROC(chacha20_arm) + +ENTRY(chacha20_neon) + cbz x2,.Labort_neon + cmp x2,#192 + b.lo .Lshort -ChaCha20_neon: stp x29,x30,[sp,#-96]! add x29,sp,#0 @@ -763,16 +763,6 @@ ldp x27,x28,[x29,#80] ldp x29,x30,[sp],#96 ret -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 @@ -1920,4 +1910,6 @@ ldp x25,x26,[x29,#64] ldp x27,x28,[x29,#80] ldp x29,x30,[sp],#96 +.Labort_neon: ret +ENDPROC(chacha20_neon) Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Cc: Samuel Neves <sneves@xxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Jean-Philippe Aumasson <jeanphilippe.aumasson@xxxxxxxxx> Cc: Andy Polyakov <appro@xxxxxxxxxxx> Cc: Russell King <linux@xxxxxxxxxxxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx --- lib/zinc/Makefile | 8 + lib/zinc/chacha20/chacha20-arm-glue.h | 50 + lib/zinc/chacha20/chacha20-arm.S | 1473 +++++++++++++++++++ lib/zinc/chacha20/chacha20-arm64.S | 1942 +++++++++++++++++++++++++ 4 files changed, 3473 insertions(+) create mode 100644 lib/zinc/chacha20/chacha20-arm-glue.h create mode 100644 lib/zinc/chacha20/chacha20-arm.S create mode 100644 lib/zinc/chacha20/chacha20-arm64.S diff --git a/lib/zinc/Makefile b/lib/zinc/Makefile index 0b5a964bfba6..8d14cb13349a 100644 --- a/lib/zinc/Makefile +++ b/lib/zinc/Makefile @@ -5,6 +5,14 @@ ccflags-$(CONFIG_ZINC_DEBUG) += -DDEBUG ifeq ($(CONFIG_ZINC_CHACHA20),y) zinc-y += chacha20/chacha20.o +ifeq ($(CONFIG_ZINC_ARCH_ARM),y) +zinc-y += chacha20/chacha20-arm.o +CFLAGS_chacha20.o += -include $(srctree)/$(src)/chacha20/chacha20-arm-glue.h +endif +ifeq ($(CONFIG_ZINC_ARCH_ARM64),y) +zinc-y += chacha20/chacha20-arm64.o +CFLAGS_chacha20.o += -include $(srctree)/$(src)/chacha20/chacha20-arm-glue.h +endif endif zinc-y += main.o diff --git a/lib/zinc/chacha20/chacha20-arm-glue.h b/lib/zinc/chacha20/chacha20-arm-glue.h new file mode 100644 index 000000000000..d32361514f3a --- /dev/null +++ b/lib/zinc/chacha20/chacha20-arm-glue.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved. + */ + +#include <zinc/chacha20.h> +#include <asm/hwcap.h> +#include <asm/neon.h> + +asmlinkage void chacha20_arm(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && \ + (defined(CONFIG_64BIT) || __LINUX_ARM_ARCH__ >= 7) +#define ARM_USE_NEON +asmlinkage void chacha20_neon(u8 *out, const u8 *in, const size_t len, + const u32 key[8], const u32 counter[4]); +#endif + +static bool chacha20_use_neon __ro_after_init; + +void __init chacha20_fpu_init(void) +{ +#if defined(CONFIG_ARM64) + chacha20_use_neon = elf_hwcap & HWCAP_ASIMD; +#elif defined(CONFIG_ARM) + chacha20_use_neon = elf_hwcap & HWCAP_NEON; +#endif +} + +static inline bool chacha20_arch(u8 *dst, const u8 *src, const size_t len, + const u32 key[8], const u32 counter[4], + simd_context_t simd_context) +{ +#if defined(ARM_USE_NEON) + if (simd_context == HAVE_FULL_SIMD && chacha20_use_neon) { + chacha20_neon(dst, src, len, key, counter); + return true; + } +#endif + chacha20_arm(dst, src, len, key, counter); + return true; +} + +static inline bool hchacha20_arch(u8 *derived_key, const u8 *nonce, + const u8 *key, simd_context_t simd_context) +{ + return false; +} + +#define HAVE_CHACHA20_ARCH_IMPLEMENTATION diff --git a/lib/zinc/chacha20/chacha20-arm.S b/lib/zinc/chacha20/chacha20-arm.S new file mode 100644 index 000000000000..0ea1db1492eb --- /dev/null +++ b/lib/zinc/chacha20/chacha20-arm.S @@ -0,0 +1,1473 @@ +/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved. + * Copyright (C) 2006-2017 CRYPTOGAMS by <appro@xxxxxxxxxxx>. All Rights Reserved. + * + * This is based in part on Andy Polyakov's implementation from CRYPTOGAMS. + */ + +#include <linux/linkage.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 +.word -1 + +.align 5 +ENTRY(chacha20_arm) + ldr r12,[sp,#0] @ pull pointer to counter and nonce + stmdb sp!,{r0-r2,r4-r11,lr} + cmp r2,#0 @ len==0? +#ifdef __thumb2__ + itt eq +#endif + addeq sp,sp,#4*3 + beq .Lno_data_arm +.Lshort: + ldmia r12,{r4-r7} @ load counter and nonce + sub sp,sp,#4*(16) @ off-load area +#if __LINUX_ARM_ARCH__ < 7 && !defined(__thumb2__) + sub r14,pc,#100 @ .Lsigma +#else + adr r14,.Lsigma @ .Lsigma +#endif + 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)] + ldr r12,[sp,#4*(12)] @ modulo-scheduled load + ldr r10, [sp,#4*(13)] + ldr r14,[sp,#4*(14)] + str r11, [sp,#4*(16+15)] + mov r11,#10 + b .Loop + +.align 4 +.Loop: + subs r11,r11,#1 + add r0,r0,r4 + mov r12,r12,ror#16 + add r1,r1,r5 + mov r10,r10,ror#16 + eor r12,r12,r0,ror#16 + eor r10,r10,r1,ror#16 + add r8,r8,r12 + mov r4,r4,ror#20 + add r9,r9,r10 + mov r5,r5,ror#20 + eor r4,r4,r8,ror#20 + eor r5,r5,r9,ror#20 + add r0,r0,r4 + mov r12,r12,ror#24 + add r1,r1,r5 + mov r10,r10,ror#24 + eor r12,r12,r0,ror#24 + eor r10,r10,r1,ror#24 + add r8,r8,r12 + mov r4,r4,ror#25 + add r9,r9,r10 + mov r5,r5,ror#25 + str r10,[sp,#4*(16+13)] + ldr r10,[sp,#4*(16+15)] + eor r4,r4,r8,ror#25 + eor r5,r5,r9,ror#25 + str r8,[sp,#4*(16+8)] + ldr r8,[sp,#4*(16+10)] + add r2,r2,r6 + mov r14,r14,ror#16 + str r9,[sp,#4*(16+9)] + ldr r9,[sp,#4*(16+11)] + add r3,r3,r7 + mov r10,r10,ror#16 + eor r14,r14,r2,ror#16 + eor r10,r10,r3,ror#16 + add r8,r8,r14 + mov r6,r6,ror#20 + add r9,r9,r10 + mov r7,r7,ror#20 + eor r6,r6,r8,ror#20 + eor r7,r7,r9,ror#20 + add r2,r2,r6 + mov r14,r14,ror#24 + add r3,r3,r7 + mov r10,r10,ror#24 + eor r14,r14,r2,ror#24 + eor r10,r10,r3,ror#24 + add r8,r8,r14 + mov r6,r6,ror#25 + add r9,r9,r10 + mov r7,r7,ror#25 + eor r6,r6,r8,ror#25 + eor r7,r7,r9,ror#25 + add r0,r0,r5 + mov r10,r10,ror#16 + add r1,r1,r6 + mov r12,r12,ror#16 + eor r10,r10,r0,ror#16 + eor r12,r12,r1,ror#16 + add r8,r8,r10 + mov r5,r5,ror#20 + add r9,r9,r12 + mov r6,r6,ror#20 + eor r5,r5,r8,ror#20 + eor r6,r6,r9,ror#20 + add r0,r0,r5 + mov r10,r10,ror#24 + add r1,r1,r6 + mov r12,r12,ror#24 + eor r10,r10,r0,ror#24 + eor r12,r12,r1,ror#24 + add r8,r8,r10 + mov r5,r5,ror#25 + str r10,[sp,#4*(16+15)] + ldr r10,[sp,#4*(16+13)] + add r9,r9,r12 + mov r6,r6,ror#25 + eor r5,r5,r8,ror#25 + eor r6,r6,r9,ror#25 + str r8,[sp,#4*(16+10)] + ldr r8,[sp,#4*(16+8)] + add r2,r2,r7 + mov r10,r10,ror#16 + str r9,[sp,#4*(16+11)] + ldr r9,[sp,#4*(16+9)] + add r3,r3,r4 + mov r14,r14,ror#16 + eor r10,r10,r2,ror#16 + eor r14,r14,r3,ror#16 + add r8,r8,r10 + mov r7,r7,ror#20 + add r9,r9,r14 + mov r4,r4,ror#20 + eor r7,r7,r8,ror#20 + eor r4,r4,r9,ror#20 + add r2,r2,r7 + mov r10,r10,ror#24 + add r3,r3,r4 + mov r14,r14,ror#24 + eor r10,r10,r2,ror#24 + eor r14,r14,r3,ror#24 + add r8,r8,r10 + mov r7,r7,ror#25 + add r9,r9,r14 + mov r4,r4,ror#25 + eor r7,r7,r8,ror#25 + eor r4,r4,r9,ror#25 + 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 __LINUX_ARM_ARCH__ >= 6 || !defined(__ARMEB__) +#if __LINUX_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 __LINUX_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,r4,r8 @ accumulate key material + add r5,r5,r9 +#ifdef __thumb2__ + itt hs +#endif + ldrhs r8,[r12],#16 @ load input + ldrhs r9,[r12,#-12] + add r6,r6,r10 + add r7,r7,r11 +#ifdef __thumb2__ + itt hs +#endif + ldrhs r10,[r12,#-8] + ldrhs r11,[r12,#-4] +#if __LINUX_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 __LINUX_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,r4,r8 @ accumulate key material + add r5,r5,r9 +#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,r6,r10 + add r7,r7,r11 +#ifdef __thumb2__ + itt hs +#endif + ldrhs r10,[r12,#-8] + ldrhs r11,[r12,#-4] +#if __LINUX_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 __LINUX_ARM_ARCH__ < 7 + b .Ltail + +.align 4 +.Lunaligned: @ unaligned endian-neutral path + cmp r11,#64 @ restore flags +#endif +#endif +#if __LINUX_ARM_ARCH__ < 7 + ldr r11,[sp,#4*(3)] + add r0,r0,r8 @ accumulate key material + add r1,r1,r9 + add r2,r2,r10 +#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,r3,r11 +#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,r4,r8 @ accumulate key material + add r5,r5,r9 + add r6,r6,r10 +#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,r7,r11 +#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,r0,r8 @ accumulate key material + add r1,r1,r9 + add r2,r2,r10 +#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,r3,r11 +#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,r4,r8 @ 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,r5,r9 + add r6,r6,r10 +#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,r7,r11 +#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_arm: + ldmia sp!,{r4-r11,pc} +ENDPROC(chacha20_arm) + +#if __LINUX_ARM_ARCH__ >= 7 && IS_ENABLED(CONFIG_KERNEL_MODE_NEON) +.align 5 +.Lsigma2: +.long 0x61707865,0x3320646e,0x79622d32,0x6b206574 @ endian-neutral +.Lone2: +.long 1,0,0,0 +.word -1 + +.arch armv7-a +.fpu neon + +.align 5 +ENTRY(chacha20_neon) + ldr r12,[sp,#0] @ pull pointer to counter and nonce + stmdb sp!,{r0-r2,r4-r11,lr} + cmp r2,#0 @ len==0? +#ifdef __thumb2__ + itt eq +#endif + addeq sp,sp,#4*3 + beq .Lno_data_neon + cmp r2,#192 @ test len + bls .Lshort +.Lchacha20_neon_begin: + adr r14,.Lsigma2 + 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 + 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 + 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 + 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)] + vadd.i32 q7,q3,q12 @ counter+1 + ldr r12,[sp,#4*(12)] @ modulo-scheduled load + vmov q6,q2 + ldr r10, [sp,#4*(13)] + vmov q10,q2 + ldr r14,[sp,#4*(14)] + vadd.i32 q11,q7,q12 @ counter+2 + str r11, [sp,#4*(16+15)] + mov r11,#10 + add r12,r12,#3 @ counter+3 + b .Loop_neon + +.align 4 +.Loop_neon: + subs r11,r11,#1 + vadd.i32 q0,q0,q1 + add r0,r0,r4 + vadd.i32 q4,q4,q5 + mov r12,r12,ror#16 + vadd.i32 q8,q8,q9 + add r1,r1,r5 + veor q3,q3,q0 + mov r10,r10,ror#16 + veor q7,q7,q4 + eor r12,r12,r0,ror#16 + veor q11,q11,q8 + eor r10,r10,r1,ror#16 + vrev32.16 q3,q3 + add r8,r8,r12 + vrev32.16 q7,q7 + mov r4,r4,ror#20 + vrev32.16 q11,q11 + add r9,r9,r10 + vadd.i32 q2,q2,q3 + mov r5,r5,ror#20 + vadd.i32 q6,q6,q7 + eor r4,r4,r8,ror#20 + vadd.i32 q10,q10,q11 + eor r5,r5,r9,ror#20 + veor q12,q1,q2 + add r0,r0,r4 + veor q13,q5,q6 + mov r12,r12,ror#24 + veor q14,q9,q10 + add r1,r1,r5 + vshr.u32 q1,q12,#20 + mov r10,r10,ror#24 + vshr.u32 q5,q13,#20 + eor r12,r12,r0,ror#24 + vshr.u32 q9,q14,#20 + eor r10,r10,r1,ror#24 + vsli.32 q1,q12,#12 + add r8,r8,r12 + vsli.32 q5,q13,#12 + mov r4,r4,ror#25 + vsli.32 q9,q14,#12 + add r9,r9,r10 + vadd.i32 q0,q0,q1 + mov r5,r5,ror#25 + vadd.i32 q4,q4,q5 + str r10,[sp,#4*(16+13)] + vadd.i32 q8,q8,q9 + ldr r10,[sp,#4*(16+15)] + veor q12,q3,q0 + eor r4,r4,r8,ror#25 + veor q13,q7,q4 + eor r5,r5,r9,ror#25 + veor q14,q11,q8 + str r8,[sp,#4*(16+8)] + vshr.u32 q3,q12,#24 + ldr r8,[sp,#4*(16+10)] + vshr.u32 q7,q13,#24 + add r2,r2,r6 + vshr.u32 q11,q14,#24 + mov r14,r14,ror#16 + vsli.32 q3,q12,#8 + str r9,[sp,#4*(16+9)] + vsli.32 q7,q13,#8 + ldr r9,[sp,#4*(16+11)] + vsli.32 q11,q14,#8 + add r3,r3,r7 + vadd.i32 q2,q2,q3 + mov r10,r10,ror#16 + vadd.i32 q6,q6,q7 + eor r14,r14,r2,ror#16 + vadd.i32 q10,q10,q11 + eor r10,r10,r3,ror#16 + veor q12,q1,q2 + add r8,r8,r14 + veor q13,q5,q6 + mov r6,r6,ror#20 + veor q14,q9,q10 + add r9,r9,r10 + vshr.u32 q1,q12,#25 + mov r7,r7,ror#20 + vshr.u32 q5,q13,#25 + eor r6,r6,r8,ror#20 + vshr.u32 q9,q14,#25 + eor r7,r7,r9,ror#20 + vsli.32 q1,q12,#7 + add r2,r2,r6 + vsli.32 q5,q13,#7 + mov r14,r14,ror#24 + vsli.32 q9,q14,#7 + add r3,r3,r7 + vext.8 q2,q2,q2,#8 + mov r10,r10,ror#24 + vext.8 q6,q6,q6,#8 + eor r14,r14,r2,ror#24 + vext.8 q10,q10,q10,#8 + eor r10,r10,r3,ror#24 + vext.8 q1,q1,q1,#4 + add r8,r8,r14 + vext.8 q5,q5,q5,#4 + mov r6,r6,ror#25 + vext.8 q9,q9,q9,#4 + add r9,r9,r10 + vext.8 q3,q3,q3,#12 + mov r7,r7,ror#25 + vext.8 q7,q7,q7,#12 + eor r6,r6,r8,ror#25 + vext.8 q11,q11,q11,#12 + eor r7,r7,r9,ror#25 + vadd.i32 q0,q0,q1 + add r0,r0,r5 + vadd.i32 q4,q4,q5 + mov r10,r10,ror#16 + vadd.i32 q8,q8,q9 + add r1,r1,r6 + veor q3,q3,q0 + mov r12,r12,ror#16 + veor q7,q7,q4 + eor r10,r10,r0,ror#16 + veor q11,q11,q8 + eor r12,r12,r1,ror#16 + vrev32.16 q3,q3 + add r8,r8,r10 + vrev32.16 q7,q7 + mov r5,r5,ror#20 + vrev32.16 q11,q11 + add r9,r9,r12 + vadd.i32 q2,q2,q3 + mov r6,r6,ror#20 + vadd.i32 q6,q6,q7 + eor r5,r5,r8,ror#20 + vadd.i32 q10,q10,q11 + eor r6,r6,r9,ror#20 + veor q12,q1,q2 + add r0,r0,r5 + veor q13,q5,q6 + mov r10,r10,ror#24 + veor q14,q9,q10 + add r1,r1,r6 + vshr.u32 q1,q12,#20 + mov r12,r12,ror#24 + vshr.u32 q5,q13,#20 + eor r10,r10,r0,ror#24 + vshr.u32 q9,q14,#20 + eor r12,r12,r1,ror#24 + vsli.32 q1,q12,#12 + add r8,r8,r10 + vsli.32 q5,q13,#12 + mov r5,r5,ror#25 + vsli.32 q9,q14,#12 + str r10,[sp,#4*(16+15)] + vadd.i32 q0,q0,q1 + ldr r10,[sp,#4*(16+13)] + vadd.i32 q4,q4,q5 + add r9,r9,r12 + vadd.i32 q8,q8,q9 + mov r6,r6,ror#25 + veor q12,q3,q0 + eor r5,r5,r8,ror#25 + veor q13,q7,q4 + eor r6,r6,r9,ror#25 + veor q14,q11,q8 + str r8,[sp,#4*(16+10)] + vshr.u32 q3,q12,#24 + ldr r8,[sp,#4*(16+8)] + vshr.u32 q7,q13,#24 + add r2,r2,r7 + vshr.u32 q11,q14,#24 + mov r10,r10,ror#16 + vsli.32 q3,q12,#8 + str r9,[sp,#4*(16+11)] + vsli.32 q7,q13,#8 + ldr r9,[sp,#4*(16+9)] + vsli.32 q11,q14,#8 + add r3,r3,r4 + vadd.i32 q2,q2,q3 + mov r14,r14,ror#16 + vadd.i32 q6,q6,q7 + eor r10,r10,r2,ror#16 + vadd.i32 q10,q10,q11 + eor r14,r14,r3,ror#16 + veor q12,q1,q2 + add r8,r8,r10 + veor q13,q5,q6 + mov r7,r7,ror#20 + veor q14,q9,q10 + add r9,r9,r14 + vshr.u32 q1,q12,#25 + mov r4,r4,ror#20 + vshr.u32 q5,q13,#25 + eor r7,r7,r8,ror#20 + vshr.u32 q9,q14,#25 + eor r4,r4,r9,ror#20 + vsli.32 q1,q12,#7 + add r2,r2,r7 + vsli.32 q5,q13,#7 + mov r10,r10,ror#24 + vsli.32 q9,q14,#7 + add r3,r3,r4 + vext.8 q2,q2,q2,#8 + mov r14,r14,ror#24 + vext.8 q6,q6,q6,#8 + eor r10,r10,r2,ror#24 + vext.8 q10,q10,q10,#8 + eor r14,r14,r3,ror#24 + vext.8 q1,q1,q1,#12 + add r8,r8,r10 + vext.8 q5,q5,q5,#12 + mov r7,r7,ror#25 + vext.8 q9,q9,q9,#12 + add r9,r9,r14 + vext.8 q3,q3,q3,#4 + mov r4,r4,ror#25 + vext.8 q7,q7,q7,#4 + eor r7,r7,r8,ror#25 + vext.8 q11,q11,q11,#4 + eor r4,r4,r9,ror#25 + 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,r4,r8 @ accumulate key material + ldr r8,[r12],#16 @ load input + add r5,r5,r9 + ldr r9,[r12,#-12] + add r6,r6,r10 + ldr r10,[r12,#-8] + add r7,r7,r11 + 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,r4,r8 @ accumulate key material + add r8,r8,#4 @ next counter value + add r5,r5,r9 + str r8,[sp,#4*(12)] @ save next counter value + ldr r8,[r12],#16 @ load input + add r6,r6,r10 + add r4,r4,#3 @ counter+3 + ldr r9,[r12,#-12] + add r7,r7,r11 + 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)] + ldr r12,[sp,#4*(12)] @ modulo-scheduled load + ldr r10, [sp,#4*(13)] + ldr r14,[sp,#4*(14)] + 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,r4,r8 @ accumulate key material + add r8,sp,#4*(8) + add r5,r5,r9 + add r6,r6,r10 + add r7,r7,r11 + 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,r4,r8 @ accumulate key material + add r8,sp,#4*(8) + add r5,r5,r9 + add r4,r4,#3 @ counter+3 + add r6,r6,r10 + add r7,r7,r11 + 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) +.Lno_data_neon: + ldmia sp!,{r4-r11,pc} +ENDPROC(chacha20_neon) +#endif diff --git a/lib/zinc/chacha20/chacha20-arm64.S b/lib/zinc/chacha20/chacha20-arm64.S new file mode 100644 index 000000000000..f90162c32a33 --- /dev/null +++ b/lib/zinc/chacha20/chacha20-arm64.S @@ -0,0 +1,1942 @@ +/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@xxxxxxxxx>. All Rights Reserved. + * Copyright (C) 2006-2017 CRYPTOGAMS by <appro@xxxxxxxxxxx>. All Rights Reserved. + * + * This is based in part on Andy Polyakov's implementation from CRYPTOGAMS. + */ + +#include <linux/linkage.h> + +.text +.align 5 +.Lsigma: +.quad 0x3320646e61707865,0x6b20657479622d32 // endian-neutral +.Lone: +.long 1,0,0,0 + +.align 5 +ENTRY(chacha20_arm) + cbz x2,.Labort +.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 +ENDPROC(chacha20_arm) + +.align 5 +ENTRY(chacha20_neon) + cbz x2,.Labort_neon + cmp x2,#192 + b.lo .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] + 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 + +.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 +.Labort_neon: + ret +ENDPROC(chacha20_neon) -- 2.19.0