1######################################################################## 2# Implement fast SHA-512 with AVX instructions. (x86_64) 3# 4# Copyright (C) 2013 Intel Corporation. 5# 6# Authors: 7# James Guilford <james.guilford@intel.com> 8# Kirk Yap <kirk.s.yap@intel.com> 9# David Cote <david.m.cote@intel.com> 10# Tim Chen <tim.c.chen@linux.intel.com> 11# 12# This software is available to you under a choice of one of two 13# licenses. You may choose to be licensed under the terms of the GNU 14# General Public License (GPL) Version 2, available from the file 15# COPYING in the main directory of this source tree, or the 16# OpenIB.org BSD license below: 17# 18# Redistribution and use in source and binary forms, with or 19# without modification, are permitted provided that the following 20# conditions are met: 21# 22# - Redistributions of source code must retain the above 23# copyright notice, this list of conditions and the following 24# disclaimer. 25# 26# - Redistributions in binary form must reproduce the above 27# copyright notice, this list of conditions and the following 28# disclaimer in the documentation and/or other materials 29# provided with the distribution. 30# 31# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 32# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 33# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 34# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 35# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 36# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 37# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 38# SOFTWARE. 39# 40######################################################################## 41# 42# This code is described in an Intel White-Paper: 43# "Fast SHA-512 Implementations on Intel Architecture Processors" 44# 45# To find it, surf to http://www.intel.com/p/en_US/embedded 46# and search for that title. 47# 48######################################################################## 49 50#ifdef CONFIG_AS_AVX 51#include <linux/linkage.h> 52 53.text 54 55# Virtual Registers 56# ARG1 57msg = %rdi 58# ARG2 59digest = %rsi 60# ARG3 61msglen = %rdx 62T1 = %rcx 63T2 = %r8 64a_64 = %r9 65b_64 = %r10 66c_64 = %r11 67d_64 = %r12 68e_64 = %r13 69f_64 = %r14 70g_64 = %r15 71h_64 = %rbx 72tmp0 = %rax 73 74# Local variables (stack frame) 75 76# Message Schedule 77W_SIZE = 80*8 78# W[t] + K[t] | W[t+1] + K[t+1] 79WK_SIZE = 2*8 80RSPSAVE_SIZE = 1*8 81GPRSAVE_SIZE = 5*8 82 83frame_W = 0 84frame_WK = frame_W + W_SIZE 85frame_RSPSAVE = frame_WK + WK_SIZE 86frame_GPRSAVE = frame_RSPSAVE + RSPSAVE_SIZE 87frame_size = frame_GPRSAVE + GPRSAVE_SIZE 88 89# Useful QWORD "arrays" for simpler memory references 90# MSG, DIGEST, K_t, W_t are arrays 91# WK_2(t) points to 1 of 2 qwords at frame.WK depdending on t being odd/even 92 93# Input message (arg1) 94#define MSG(i) 8*i(msg) 95 96# Output Digest (arg2) 97#define DIGEST(i) 8*i(digest) 98 99# SHA Constants (static mem) 100#define K_t(i) 8*i+K512(%rip) 101 102# Message Schedule (stack frame) 103#define W_t(i) 8*i+frame_W(%rsp) 104 105# W[t]+K[t] (stack frame) 106#define WK_2(i) 8*((i%2))+frame_WK(%rsp) 107 108.macro RotateState 109 # Rotate symbols a..h right 110 TMP = h_64 111 h_64 = g_64 112 g_64 = f_64 113 f_64 = e_64 114 e_64 = d_64 115 d_64 = c_64 116 c_64 = b_64 117 b_64 = a_64 118 a_64 = TMP 119.endm 120 121.macro RORQ p1 p2 122 # shld is faster than ror on Sandybridge 123 shld $(64-\p2), \p1, \p1 124.endm 125 126.macro SHA512_Round rnd 127 # Compute Round %%t 128 mov f_64, T1 # T1 = f 129 mov e_64, tmp0 # tmp = e 130 xor g_64, T1 # T1 = f ^ g 131 RORQ tmp0, 23 # 41 # tmp = e ror 23 132 and e_64, T1 # T1 = (f ^ g) & e 133 xor e_64, tmp0 # tmp = (e ror 23) ^ e 134 xor g_64, T1 # T1 = ((f ^ g) & e) ^ g = CH(e,f,g) 135 idx = \rnd 136 add WK_2(idx), T1 # W[t] + K[t] from message scheduler 137 RORQ tmp0, 4 # 18 # tmp = ((e ror 23) ^ e) ror 4 138 xor e_64, tmp0 # tmp = (((e ror 23) ^ e) ror 4) ^ e 139 mov a_64, T2 # T2 = a 140 add h_64, T1 # T1 = CH(e,f,g) + W[t] + K[t] + h 141 RORQ tmp0, 14 # 14 # tmp = ((((e ror23)^e)ror4)^e)ror14 = S1(e) 142 add tmp0, T1 # T1 = CH(e,f,g) + W[t] + K[t] + S1(e) 143 mov a_64, tmp0 # tmp = a 144 xor c_64, T2 # T2 = a ^ c 145 and c_64, tmp0 # tmp = a & c 146 and b_64, T2 # T2 = (a ^ c) & b 147 xor tmp0, T2 # T2 = ((a ^ c) & b) ^ (a & c) = Maj(a,b,c) 148 mov a_64, tmp0 # tmp = a 149 RORQ tmp0, 5 # 39 # tmp = a ror 5 150 xor a_64, tmp0 # tmp = (a ror 5) ^ a 151 add T1, d_64 # e(next_state) = d + T1 152 RORQ tmp0, 6 # 34 # tmp = ((a ror 5) ^ a) ror 6 153 xor a_64, tmp0 # tmp = (((a ror 5) ^ a) ror 6) ^ a 154 lea (T1, T2), h_64 # a(next_state) = T1 + Maj(a,b,c) 155 RORQ tmp0, 28 # 28 # tmp = ((((a ror5)^a)ror6)^a)ror28 = S0(a) 156 add tmp0, h_64 # a(next_state) = T1 + Maj(a,b,c) S0(a) 157 RotateState 158.endm 159 160.macro SHA512_2Sched_2Round_avx rnd 161 # Compute rounds t-2 and t-1 162 # Compute message schedule QWORDS t and t+1 163 164 # Two rounds are computed based on the values for K[t-2]+W[t-2] and 165 # K[t-1]+W[t-1] which were previously stored at WK_2 by the message 166 # scheduler. 167 # The two new schedule QWORDS are stored at [W_t(t)] and [W_t(t+1)]. 168 # They are then added to their respective SHA512 constants at 169 # [K_t(t)] and [K_t(t+1)] and stored at dqword [WK_2(t)] 170 # For brievity, the comments following vectored instructions only refer to 171 # the first of a pair of QWORDS. 172 # Eg. XMM4=W[t-2] really means XMM4={W[t-2]|W[t-1]} 173 # The computation of the message schedule and the rounds are tightly 174 # stitched to take advantage of instruction-level parallelism. 175 176 idx = \rnd - 2 177 vmovdqa W_t(idx), %xmm4 # XMM4 = W[t-2] 178 idx = \rnd - 15 179 vmovdqu W_t(idx), %xmm5 # XMM5 = W[t-15] 180 mov f_64, T1 181 vpsrlq $61, %xmm4, %xmm0 # XMM0 = W[t-2]>>61 182 mov e_64, tmp0 183 vpsrlq $1, %xmm5, %xmm6 # XMM6 = W[t-15]>>1 184 xor g_64, T1 185 RORQ tmp0, 23 # 41 186 vpsrlq $19, %xmm4, %xmm1 # XMM1 = W[t-2]>>19 187 and e_64, T1 188 xor e_64, tmp0 189 vpxor %xmm1, %xmm0, %xmm0 # XMM0 = W[t-2]>>61 ^ W[t-2]>>19 190 xor g_64, T1 191 idx = \rnd 192 add WK_2(idx), T1# 193 vpsrlq $8, %xmm5, %xmm7 # XMM7 = W[t-15]>>8 194 RORQ tmp0, 4 # 18 195 vpsrlq $6, %xmm4, %xmm2 # XMM2 = W[t-2]>>6 196 xor e_64, tmp0 197 mov a_64, T2 198 add h_64, T1 199 vpxor %xmm7, %xmm6, %xmm6 # XMM6 = W[t-15]>>1 ^ W[t-15]>>8 200 RORQ tmp0, 14 # 14 201 add tmp0, T1 202 vpsrlq $7, %xmm5, %xmm8 # XMM8 = W[t-15]>>7 203 mov a_64, tmp0 204 xor c_64, T2 205 vpsllq $(64-61), %xmm4, %xmm3 # XMM3 = W[t-2]<<3 206 and c_64, tmp0 207 and b_64, T2 208 vpxor %xmm3, %xmm2, %xmm2 # XMM2 = W[t-2]>>6 ^ W[t-2]<<3 209 xor tmp0, T2 210 mov a_64, tmp0 211 vpsllq $(64-1), %xmm5, %xmm9 # XMM9 = W[t-15]<<63 212 RORQ tmp0, 5 # 39 213 vpxor %xmm9, %xmm8, %xmm8 # XMM8 = W[t-15]>>7 ^ W[t-15]<<63 214 xor a_64, tmp0 215 add T1, d_64 216 RORQ tmp0, 6 # 34 217 xor a_64, tmp0 218 vpxor %xmm8, %xmm6, %xmm6 # XMM6 = W[t-15]>>1 ^ W[t-15]>>8 ^ 219 # W[t-15]>>7 ^ W[t-15]<<63 220 lea (T1, T2), h_64 221 RORQ tmp0, 28 # 28 222 vpsllq $(64-19), %xmm4, %xmm4 # XMM4 = W[t-2]<<25 223 add tmp0, h_64 224 RotateState 225 vpxor %xmm4, %xmm0, %xmm0 # XMM0 = W[t-2]>>61 ^ W[t-2]>>19 ^ 226 # W[t-2]<<25 227 mov f_64, T1 228 vpxor %xmm2, %xmm0, %xmm0 # XMM0 = s1(W[t-2]) 229 mov e_64, tmp0 230 xor g_64, T1 231 idx = \rnd - 16 232 vpaddq W_t(idx), %xmm0, %xmm0 # XMM0 = s1(W[t-2]) + W[t-16] 233 idx = \rnd - 7 234 vmovdqu W_t(idx), %xmm1 # XMM1 = W[t-7] 235 RORQ tmp0, 23 # 41 236 and e_64, T1 237 xor e_64, tmp0 238 xor g_64, T1 239 vpsllq $(64-8), %xmm5, %xmm5 # XMM5 = W[t-15]<<56 240 idx = \rnd + 1 241 add WK_2(idx), T1 242 vpxor %xmm5, %xmm6, %xmm6 # XMM6 = s0(W[t-15]) 243 RORQ tmp0, 4 # 18 244 vpaddq %xmm6, %xmm0, %xmm0 # XMM0 = s1(W[t-2]) + W[t-16] + s0(W[t-15]) 245 xor e_64, tmp0 246 vpaddq %xmm1, %xmm0, %xmm0 # XMM0 = W[t] = s1(W[t-2]) + W[t-7] + 247 # s0(W[t-15]) + W[t-16] 248 mov a_64, T2 249 add h_64, T1 250 RORQ tmp0, 14 # 14 251 add tmp0, T1 252 idx = \rnd 253 vmovdqa %xmm0, W_t(idx) # Store W[t] 254 vpaddq K_t(idx), %xmm0, %xmm0 # Compute W[t]+K[t] 255 vmovdqa %xmm0, WK_2(idx) # Store W[t]+K[t] for next rounds 256 mov a_64, tmp0 257 xor c_64, T2 258 and c_64, tmp0 259 and b_64, T2 260 xor tmp0, T2 261 mov a_64, tmp0 262 RORQ tmp0, 5 # 39 263 xor a_64, tmp0 264 add T1, d_64 265 RORQ tmp0, 6 # 34 266 xor a_64, tmp0 267 lea (T1, T2), h_64 268 RORQ tmp0, 28 # 28 269 add tmp0, h_64 270 RotateState 271.endm 272 273######################################################################## 274# void sha512_transform_avx(const void* M, void* D, u64 L) 275# Purpose: Updates the SHA512 digest stored at D with the message stored in M. 276# The size of the message pointed to by M must be an integer multiple of SHA512 277# message blocks. 278# L is the message length in SHA512 blocks 279######################################################################## 280ENTRY(sha512_transform_avx) 281 cmp $0, msglen 282 je nowork 283 284 # Allocate Stack Space 285 mov %rsp, %rax 286 sub $frame_size, %rsp 287 and $~(0x20 - 1), %rsp 288 mov %rax, frame_RSPSAVE(%rsp) 289 290 # Save GPRs 291 mov %rbx, frame_GPRSAVE(%rsp) 292 mov %r12, frame_GPRSAVE +8*1(%rsp) 293 mov %r13, frame_GPRSAVE +8*2(%rsp) 294 mov %r14, frame_GPRSAVE +8*3(%rsp) 295 mov %r15, frame_GPRSAVE +8*4(%rsp) 296 297updateblock: 298 299 # Load state variables 300 mov DIGEST(0), a_64 301 mov DIGEST(1), b_64 302 mov DIGEST(2), c_64 303 mov DIGEST(3), d_64 304 mov DIGEST(4), e_64 305 mov DIGEST(5), f_64 306 mov DIGEST(6), g_64 307 mov DIGEST(7), h_64 308 309 t = 0 310 .rept 80/2 + 1 311 # (80 rounds) / (2 rounds/iteration) + (1 iteration) 312 # +1 iteration because the scheduler leads hashing by 1 iteration 313 .if t < 2 314 # BSWAP 2 QWORDS 315 vmovdqa XMM_QWORD_BSWAP(%rip), %xmm1 316 vmovdqu MSG(t), %xmm0 317 vpshufb %xmm1, %xmm0, %xmm0 # BSWAP 318 vmovdqa %xmm0, W_t(t) # Store Scheduled Pair 319 vpaddq K_t(t), %xmm0, %xmm0 # Compute W[t]+K[t] 320 vmovdqa %xmm0, WK_2(t) # Store into WK for rounds 321 .elseif t < 16 322 # BSWAP 2 QWORDS# Compute 2 Rounds 323 vmovdqu MSG(t), %xmm0 324 vpshufb %xmm1, %xmm0, %xmm0 # BSWAP 325 SHA512_Round t-2 # Round t-2 326 vmovdqa %xmm0, W_t(t) # Store Scheduled Pair 327 vpaddq K_t(t), %xmm0, %xmm0 # Compute W[t]+K[t] 328 SHA512_Round t-1 # Round t-1 329 vmovdqa %xmm0, WK_2(t)# Store W[t]+K[t] into WK 330 .elseif t < 79 331 # Schedule 2 QWORDS# Compute 2 Rounds 332 SHA512_2Sched_2Round_avx t 333 .else 334 # Compute 2 Rounds 335 SHA512_Round t-2 336 SHA512_Round t-1 337 .endif 338 t = t+2 339 .endr 340 341 # Update digest 342 add a_64, DIGEST(0) 343 add b_64, DIGEST(1) 344 add c_64, DIGEST(2) 345 add d_64, DIGEST(3) 346 add e_64, DIGEST(4) 347 add f_64, DIGEST(5) 348 add g_64, DIGEST(6) 349 add h_64, DIGEST(7) 350 351 # Advance to next message block 352 add $16*8, msg 353 dec msglen 354 jnz updateblock 355 356 # Restore GPRs 357 mov frame_GPRSAVE(%rsp), %rbx 358 mov frame_GPRSAVE +8*1(%rsp), %r12 359 mov frame_GPRSAVE +8*2(%rsp), %r13 360 mov frame_GPRSAVE +8*3(%rsp), %r14 361 mov frame_GPRSAVE +8*4(%rsp), %r15 362 363 # Restore Stack Pointer 364 mov frame_RSPSAVE(%rsp), %rsp 365 366nowork: 367 ret 368ENDPROC(sha512_transform_avx) 369 370######################################################################## 371### Binary Data 372 373.data 374 375.align 16 376 377# Mask for byte-swapping a couple of qwords in an XMM register using (v)pshufb. 378XMM_QWORD_BSWAP: 379 .octa 0x08090a0b0c0d0e0f0001020304050607 380 381# K[t] used in SHA512 hashing 382K512: 383 .quad 0x428a2f98d728ae22,0x7137449123ef65cd 384 .quad 0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc 385 .quad 0x3956c25bf348b538,0x59f111f1b605d019 386 .quad 0x923f82a4af194f9b,0xab1c5ed5da6d8118 387 .quad 0xd807aa98a3030242,0x12835b0145706fbe 388 .quad 0x243185be4ee4b28c,0x550c7dc3d5ffb4e2 389 .quad 0x72be5d74f27b896f,0x80deb1fe3b1696b1 390 .quad 0x9bdc06a725c71235,0xc19bf174cf692694 391 .quad 0xe49b69c19ef14ad2,0xefbe4786384f25e3 392 .quad 0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65 393 .quad 0x2de92c6f592b0275,0x4a7484aa6ea6e483 394 .quad 0x5cb0a9dcbd41fbd4,0x76f988da831153b5 395 .quad 0x983e5152ee66dfab,0xa831c66d2db43210 396 .quad 0xb00327c898fb213f,0xbf597fc7beef0ee4 397 .quad 0xc6e00bf33da88fc2,0xd5a79147930aa725 398 .quad 0x06ca6351e003826f,0x142929670a0e6e70 399 .quad 0x27b70a8546d22ffc,0x2e1b21385c26c926 400 .quad 0x4d2c6dfc5ac42aed,0x53380d139d95b3df 401 .quad 0x650a73548baf63de,0x766a0abb3c77b2a8 402 .quad 0x81c2c92e47edaee6,0x92722c851482353b 403 .quad 0xa2bfe8a14cf10364,0xa81a664bbc423001 404 .quad 0xc24b8b70d0f89791,0xc76c51a30654be30 405 .quad 0xd192e819d6ef5218,0xd69906245565a910 406 .quad 0xf40e35855771202a,0x106aa07032bbd1b8 407 .quad 0x19a4c116b8d2d0c8,0x1e376c085141ab53 408 .quad 0x2748774cdf8eeb99,0x34b0bcb5e19b48a8 409 .quad 0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb 410 .quad 0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3 411 .quad 0x748f82ee5defb2fc,0x78a5636f43172f60 412 .quad 0x84c87814a1f0ab72,0x8cc702081a6439ec 413 .quad 0x90befffa23631e28,0xa4506cebde82bde9 414 .quad 0xbef9a3f7b2c67915,0xc67178f2e372532b 415 .quad 0xca273eceea26619c,0xd186b8c721c0c207 416 .quad 0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178 417 .quad 0x06f067aa72176fba,0x0a637dc5a2c898a6 418 .quad 0x113f9804bef90dae,0x1b710b35131c471b 419 .quad 0x28db77f523047d84,0x32caab7b40c72493 420 .quad 0x3c9ebe0a15c9bebc,0x431d67c49c100d4c 421 .quad 0x4cc5d4becb3e42b6,0x597f299cfc657e2a 422 .quad 0x5fcb6fab3ad6faec,0x6c44198c4a475817 423#endif 424