LXR linux/arch/x86/crypto/poly1305-avx2-x86

   1/*
   2 * Poly1305 authenticator algorithm, RFC7539, x64 AVX2 functions
   3 *
   4 * Copyright (C) 2015 Martin Willi
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 */
  11
  12#include <linux/linkage.h>
  13
  14.section        .rodata.cst32.ANMASK, "aM", @progbits, 32
  15.align 32
  16ANMASK: .octa 0x0000000003ffffff0000000003ffffff
  17        .octa 0x0000000003ffffff0000000003ffffff
  18
  19.section        .rodata.cst32.ORMASK, "aM", @progbits, 32
  20.align 32
  21ORMASK: .octa 0x00000000010000000000000001000000
  22        .octa 0x00000000010000000000000001000000
  23
  24.text
  25
  26#define h0 0x00(%rdi)
  27#define h1 0x04(%rdi)
  28#define h2 0x08(%rdi)
  29#define h3 0x0c(%rdi)
  30#define h4 0x10(%rdi)
  31#define r0 0x00(%rdx)
  32#define r1 0x04(%rdx)
  33#define r2 0x08(%rdx)
  34#define r3 0x0c(%rdx)
  35#define r4 0x10(%rdx)
  36#define u0 0x00(%r8)
  37#define u1 0x04(%r8)
  38#define u2 0x08(%r8)
  39#define u3 0x0c(%r8)
  40#define u4 0x10(%r8)
  41#define w0 0x14(%r8)
  42#define w1 0x18(%r8)
  43#define w2 0x1c(%r8)
  44#define w3 0x20(%r8)
  45#define w4 0x24(%r8)
  46#define y0 0x28(%r8)
  47#define y1 0x2c(%r8)
  48#define y2 0x30(%r8)
  49#define y3 0x34(%r8)
  50#define y4 0x38(%r8)
  51#define m %rsi
  52#define hc0 %ymm0
  53#define hc1 %ymm1
  54#define hc2 %ymm2
  55#define hc3 %ymm3
  56#define hc4 %ymm4
  57#define hc0x %xmm0
  58#define hc1x %xmm1
  59#define hc2x %xmm2
  60#define hc3x %xmm3
  61#define hc4x %xmm4
  62#define t1 %ymm5
  63#define t2 %ymm6
  64#define t1x %xmm5
  65#define t2x %xmm6
  66#define ruwy0 %ymm7
  67#define ruwy1 %ymm8
  68#define ruwy2 %ymm9
  69#define ruwy3 %ymm10
  70#define ruwy4 %ymm11
  71#define ruwy0x %xmm7
  72#define ruwy1x %xmm8
  73#define ruwy2x %xmm9
  74#define ruwy3x %xmm10
  75#define ruwy4x %xmm11
  76#define svxz1 %ymm12
  77#define svxz2 %ymm13
  78#define svxz3 %ymm14
  79#define svxz4 %ymm15
  80#define d0 %r9
  81#define d1 %r10
  82#define d2 %r11
  83#define d3 %r12
  84#define d4 %r13
  85
  86ENTRY(poly1305_4block_avx2)
  87        # %rdi: Accumulator h[5]
  88        # %rsi: 64 byte input block m
  89        # %rdx: Poly1305 key r[5]
  90        # %rcx: Quadblock count
  91        # %r8:  Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5],
  92
  93        # This four-block variant uses loop unrolled block processing. It
  94        # requires 4 Poly1305 keys: r, r^2, r^3 and r^4:
  95        # h = (h + m) * r  =>  h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r
  96
  97        vzeroupper
  98        push            %rbx
  99        push            %r12
 100        push            %r13
 101
 102        # combine r0,u0,w0,y0
 103        vmovd           y0,ruwy0x
 104        vmovd           w0,t1x
 105        vpunpcklqdq     t1,ruwy0,ruwy0
 106        vmovd           u0,t1x
 107        vmovd           r0,t2x
 108        vpunpcklqdq     t2,t1,t1
 109        vperm2i128      $0x20,t1,ruwy0,ruwy0
 110
 111        # combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5
 112        vmovd           y1,ruwy1x
 113        vmovd           w1,t1x
 114        vpunpcklqdq     t1,ruwy1,ruwy1
 115        vmovd           u1,t1x
 116        vmovd           r1,t2x
 117        vpunpcklqdq     t2,t1,t1
 118        vperm2i128      $0x20,t1,ruwy1,ruwy1
 119        vpslld          $2,ruwy1,svxz1
 120        vpaddd          ruwy1,svxz1,svxz1
 121
 122        # combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5
 123        vmovd           y2,ruwy2x
 124        vmovd           w2,t1x
 125        vpunpcklqdq     t1,ruwy2,ruwy2
 126        vmovd           u2,t1x
 127        vmovd           r2,t2x
 128        vpunpcklqdq     t2,t1,t1
 129        vperm2i128      $0x20,t1,ruwy2,ruwy2
 130        vpslld          $2,ruwy2,svxz2
 131        vpaddd          ruwy2,svxz2,svxz2
 132
 133        # combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5
 134        vmovd           y3,ruwy3x
 135        vmovd           w3,t1x
 136        vpunpcklqdq     t1,ruwy3,ruwy3
 137        vmovd           u3,t1x
 138        vmovd           r3,t2x
 139        vpunpcklqdq     t2,t1,t1
 140        vperm2i128      $0x20,t1,ruwy3,ruwy3
 141        vpslld          $2,ruwy3,svxz3
 142        vpaddd          ruwy3,svxz3,svxz3
 143
 144        # combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5
 145        vmovd           y4,ruwy4x
 146        vmovd           w4,t1x
 147        vpunpcklqdq     t1,ruwy4,ruwy4
 148        vmovd           u4,t1x
 149        vmovd           r4,t2x
 150        vpunpcklqdq     t2,t1,t1
 151        vperm2i128      $0x20,t1,ruwy4,ruwy4
 152        vpslld          $2,ruwy4,svxz4
 153        vpaddd          ruwy4,svxz4,svxz4
 154
 155.Ldoblock4:
 156        # hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff,
 157        #        m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0]
 158        vmovd           0x00(m),hc0x
 159        vmovd           0x10(m),t1x
 160        vpunpcklqdq     t1,hc0,hc0
 161        vmovd           0x20(m),t1x
 162        vmovd           0x30(m),t2x
 163        vpunpcklqdq     t2,t1,t1
 164        vperm2i128      $0x20,t1,hc0,hc0
 165        vpand           ANMASK(%rip),hc0,hc0
 166        vmovd           h0,t1x
 167        vpaddd          t1,hc0,hc0
 168        # hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff,
 169        #        (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1]
 170        vmovd           0x03(m),hc1x
 171        vmovd           0x13(m),t1x
 172        vpunpcklqdq     t1,hc1,hc1
 173        vmovd           0x23(m),t1x
 174        vmovd           0x33(m),t2x
 175        vpunpcklqdq     t2,t1,t1
 176        vperm2i128      $0x20,t1,hc1,hc1
 177        vpsrld          $2,hc1,hc1
 178        vpand           ANMASK(%rip),hc1,hc1
 179        vmovd           h1,t1x
 180        vpaddd          t1,hc1,hc1
 181        # hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff,
 182        #        (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2]
 183        vmovd           0x06(m),hc2x
 184        vmovd           0x16(m),t1x
 185        vpunpcklqdq     t1,hc2,hc2
 186        vmovd           0x26(m),t1x
 187        vmovd           0x36(m),t2x
 188        vpunpcklqdq     t2,t1,t1
 189        vperm2i128      $0x20,t1,hc2,hc2
 190        vpsrld          $4,hc2,hc2
 191        vpand           ANMASK(%rip),hc2,hc2
 192        vmovd           h2,t1x
 193        vpaddd          t1,hc2,hc2
 194        # hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff,
 195        #        (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3]
 196        vmovd           0x09(m),hc3x
 197        vmovd           0x19(m),t1x
 198        vpunpcklqdq     t1,hc3,hc3
 199        vmovd           0x29(m),t1x
 200        vmovd           0x39(m),t2x
 201        vpunpcklqdq     t2,t1,t1
 202        vperm2i128      $0x20,t1,hc3,hc3
 203        vpsrld          $6,hc3,hc3
 204        vpand           ANMASK(%rip),hc3,hc3
 205        vmovd           h3,t1x
 206        vpaddd          t1,hc3,hc3
 207        # hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24),
 208        #        (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4]
 209        vmovd           0x0c(m),hc4x
 210        vmovd           0x1c(m),t1x
 211        vpunpcklqdq     t1,hc4,hc4
 212        vmovd           0x2c(m),t1x
 213        vmovd           0x3c(m),t2x
 214        vpunpcklqdq     t2,t1,t1
 215        vperm2i128      $0x20,t1,hc4,hc4
 216        vpsrld          $8,hc4,hc4
 217        vpor            ORMASK(%rip),hc4,hc4
 218        vmovd           h4,t1x
 219        vpaddd          t1,hc4,hc4
 220
 221        # t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ]
 222        vpmuludq        hc0,ruwy0,t1
 223        # t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ]
 224        vpmuludq        hc1,svxz4,t2
 225        vpaddq          t2,t1,t1
 226        # t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ]
 227        vpmuludq        hc2,svxz3,t2
 228        vpaddq          t2,t1,t1
 229        # t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ]
 230        vpmuludq        hc3,svxz2,t2
 231        vpaddq          t2,t1,t1
 232        # t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ]
 233        vpmuludq        hc4,svxz1,t2
 234        vpaddq          t2,t1,t1
 235        # d0 = t1[0] + t1[1] + t[2] + t[3]
 236        vpermq          $0xee,t1,t2
 237        vpaddq          t2,t1,t1
 238        vpsrldq         $8,t1,t2
 239        vpaddq          t2,t1,t1
 240        vmovq           t1x,d0
 241
 242        # t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ]
 243        vpmuludq        hc0,ruwy1,t1
 244        # t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ]
 245        vpmuludq        hc1,ruwy0,t2
 246        vpaddq          t2,t1,t1
 247        # t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ]
 248        vpmuludq        hc2,svxz4,t2
 249        vpaddq          t2,t1,t1
 250        # t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ]
 251        vpmuludq        hc3,svxz3,t2
 252        vpaddq          t2,t1,t1
 253        # t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ]
 254        vpmuludq        hc4,svxz2,t2
 255        vpaddq          t2,t1,t1
 256        # d1 = t1[0] + t1[1] + t1[3] + t1[4]
 257        vpermq          $0xee,t1,t2
 258        vpaddq          t2,t1,t1
 259        vpsrldq         $8,t1,t2
 260        vpaddq          t2,t1,t1
 261        vmovq           t1x,d1
 262
 263        # t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ]
 264        vpmuludq        hc0,ruwy2,t1
 265        # t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ]
 266        vpmuludq        hc1,ruwy1,t2
 267        vpaddq          t2,t1,t1
 268        # t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ]
 269        vpmuludq        hc2,ruwy0,t2
 270        vpaddq          t2,t1,t1
 271        # t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ]
 272        vpmuludq        hc3,svxz4,t2
 273        vpaddq          t2,t1,t1
 274        # t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ]
 275        vpmuludq        hc4,svxz3,t2
 276        vpaddq          t2,t1,t1
 277        # d2 = t1[0] + t1[1] + t1[2] + t1[3]
 278        vpermq          $0xee,t1,t2
 279        vpaddq          t2,t1,t1
 280        vpsrldq         $8,t1,t2
 281        vpaddq          t2,t1,t1
 282        vmovq           t1x,d2
 283
 284        # t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ]
 285        vpmuludq        hc0,ruwy3,t1
 286        # t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ]
 287        vpmuludq        hc1,ruwy2,t2
 288        vpaddq          t2,t1,t1
 289        # t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ]
 290        vpmuludq        hc2,ruwy1,t2
 291        vpaddq          t2,t1,t1
 292        # t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ]
 293        vpmuludq        hc3,ruwy0,t2
 294        vpaddq          t2,t1,t1
 295        # t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ]
 296        vpmuludq        hc4,svxz4,t2
 297        vpaddq          t2,t1,t1
 298        # d3 = t1[0] + t1[1] + t1[2] + t1[3]
 299        vpermq          $0xee,t1,t2
 300        vpaddq          t2,t1,t1
 301        vpsrldq         $8,t1,t2
 302        vpaddq          t2,t1,t1
 303        vmovq           t1x,d3
 304
 305        # t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ]
 306        vpmuludq        hc0,ruwy4,t1
 307        # t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ]
 308        vpmuludq        hc1,ruwy3,t2
 309        vpaddq          t2,t1,t1
 310        # t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ]
 311        vpmuludq        hc2,ruwy2,t2
 312        vpaddq          t2,t1,t1
 313        # t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ]
 314        vpmuludq        hc3,ruwy1,t2
 315        vpaddq          t2,t1,t1
 316        # t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ]
 317        vpmuludq        hc4,ruwy0,t2
 318        vpaddq          t2,t1,t1
 319        # d4 = t1[0] + t1[1] + t1[2] + t1[3]
 320        vpermq          $0xee,t1,t2
 321        vpaddq          t2,t1,t1
 322        vpsrldq         $8,t1,t2
 323        vpaddq          t2,t1,t1
 324        vmovq           t1x,d4
 325
 326        # d1 += d0 >> 26
 327        mov             d0,%rax
 328        shr             $26,%rax
 329        add             %rax,d1
 330        # h0 = d0 & 0x3ffffff
 331        mov             d0,%rbx
 332        and             $0x3ffffff,%ebx
 333
 334        # d2 += d1 >> 26
 335        mov             d1,%rax
 336        shr             $26,%rax
 337        add             %rax,d2
 338        # h1 = d1 & 0x3ffffff
 339        mov             d1,%rax
 340        and             $0x3ffffff,%eax
 341        mov             %eax,h1
 342
 343        # d3 += d2 >> 26
 344        mov             d2,%rax
 345        shr             $26,%rax
 346        add             %rax,d3
 347        # h2 = d2 & 0x3ffffff
 348        mov             d2,%rax
 349        and             $0x3ffffff,%eax
 350        mov             %eax,h2
 351
 352        # d4 += d3 >> 26
 353        mov             d3,%rax
 354        shr             $26,%rax
 355        add             %rax,d4
 356        # h3 = d3 & 0x3ffffff
 357        mov             d3,%rax
 358        and             $0x3ffffff,%eax
 359        mov             %eax,h3
 360
 361        # h0 += (d4 >> 26) * 5
 362        mov             d4,%rax
 363        shr             $26,%rax
 364        lea             (%eax,%eax,4),%eax
 365        add             %eax,%ebx
 366        # h4 = d4 & 0x3ffffff
 367        mov             d4,%rax
 368        and             $0x3ffffff,%eax
 369        mov             %eax,h4
 370
 371        # h1 += h0 >> 26
 372        mov             %ebx,%eax
 373        shr             $26,%eax
 374        add             %eax,h1
 375        # h0 = h0 & 0x3ffffff
 376        andl            $0x3ffffff,%ebx
 377        mov             %ebx,h0
 378
 379        add             $0x40,m
 380        dec             %rcx
 381        jnz             .Ldoblock4
 382
 383        vzeroupper
 384        pop             %r13
 385        pop             %r12
 386        pop             %rbx
 387        ret
 388ENDPROC(poly1305_4block_avx2)
 389