arch/x86/crypto/poly1305-sse2-x86

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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Poly1305 authenticator algorithm, RFC7539, x64 SSE2 functions
   4  *
   5  * Copyright (C) 2015 Martin Willi
   6  */
   7 
   8 #include <linux/linkage.h>
   9 
  10 .section        .rodata.cst16.ANMASK, "aM", @progbits, 16
  11 .align 16
  12 ANMASK: .octa 0x0000000003ffffff0000000003ffffff
  13 
  14 .section        .rodata.cst16.ORMASK, "aM", @progbits, 16
  15 .align 16
  16 ORMASK: .octa 0x00000000010000000000000001000000
  17 
  18 .text
  19 
  20 #define h0 0x00(%rdi)
  21 #define h1 0x04(%rdi)
  22 #define h2 0x08(%rdi)
  23 #define h3 0x0c(%rdi)
  24 #define h4 0x10(%rdi)
  25 #define r0 0x00(%rdx)
  26 #define r1 0x04(%rdx)
  27 #define r2 0x08(%rdx)
  28 #define r3 0x0c(%rdx)
  29 #define r4 0x10(%rdx)
  30 #define s1 0x00(%rsp)
  31 #define s2 0x04(%rsp)
  32 #define s3 0x08(%rsp)
  33 #define s4 0x0c(%rsp)
  34 #define m %rsi
  35 #define h01 %xmm0
  36 #define h23 %xmm1
  37 #define h44 %xmm2
  38 #define t1 %xmm3
  39 #define t2 %xmm4
  40 #define t3 %xmm5
  41 #define t4 %xmm6
  42 #define mask %xmm7
  43 #define d0 %r8
  44 #define d1 %r9
  45 #define d2 %r10
  46 #define d3 %r11
  47 #define d4 %r12
  48 
  49 ENTRY(poly1305_block_sse2)
  50         # %rdi: Accumulator h[5]
  51         # %rsi: 16 byte input block m
  52         # %rdx: Poly1305 key r[5]
  53         # %rcx: Block count
  54 
  55         # This single block variant tries to improve performance by doing two
  56         # multiplications in parallel using SSE instructions. There is quite
  57         # some quardword packing involved, hence the speedup is marginal.
  58 
  59         push            %rbx
  60         push            %r12
  61         sub             $0x10,%rsp
  62 
  63         # s1..s4 = r1..r4 * 5
  64         mov             r1,%eax
  65         lea             (%eax,%eax,4),%eax
  66         mov             %eax,s1
  67         mov             r2,%eax
  68         lea             (%eax,%eax,4),%eax
  69         mov             %eax,s2
  70         mov             r3,%eax
  71         lea             (%eax,%eax,4),%eax
  72         mov             %eax,s3
  73         mov             r4,%eax
  74         lea             (%eax,%eax,4),%eax
  75         mov             %eax,s4
  76 
  77         movdqa          ANMASK(%rip),mask
  78 
  79 .Ldoblock:
  80         # h01 = [0, h1, 0, h0]
  81         # h23 = [0, h3, 0, h2]
  82         # h44 = [0, h4, 0, h4]
  83         movd            h0,h01
  84         movd            h1,t1
  85         movd            h2,h23
  86         movd            h3,t2
  87         movd            h4,h44
  88         punpcklqdq      t1,h01
  89         punpcklqdq      t2,h23
  90         punpcklqdq      h44,h44
  91 
  92         # h01 += [ (m[3-6] >> 2) & 0x3ffffff, m[0-3] & 0x3ffffff ]
  93         movd            0x00(m),t1
  94         movd            0x03(m),t2
  95         psrld           $2,t2
  96         punpcklqdq      t2,t1
  97         pand            mask,t1
  98         paddd           t1,h01
  99         # h23 += [ (m[9-12] >> 6) & 0x3ffffff, (m[6-9] >> 4) & 0x3ffffff ]
 100         movd            0x06(m),t1
 101         movd            0x09(m),t2
 102         psrld           $4,t1
 103         psrld           $6,t2
 104         punpcklqdq      t2,t1
 105         pand            mask,t1
 106         paddd           t1,h23
 107         # h44 += [ (m[12-15] >> 8) | (1 << 24), (m[12-15] >> 8) | (1 << 24) ]
 108         mov             0x0c(m),%eax
 109         shr             $8,%eax
 110         or              $0x01000000,%eax
 111         movd            %eax,t1
 112         pshufd          $0xc4,t1,t1
 113         paddd           t1,h44
 114 
 115         # t1[0] = h0 * r0 + h2 * s3
 116         # t1[1] = h1 * s4 + h3 * s2
 117         movd            r0,t1
 118         movd            s4,t2
 119         punpcklqdq      t2,t1
 120         pmuludq         h01,t1
 121         movd            s3,t2
 122         movd            s2,t3
 123         punpcklqdq      t3,t2
 124         pmuludq         h23,t2
 125         paddq           t2,t1
 126         # t2[0] = h0 * r1 + h2 * s4
 127         # t2[1] = h1 * r0 + h3 * s3
 128         movd            r1,t2
 129         movd            r0,t3
 130         punpcklqdq      t3,t2
 131         pmuludq         h01,t2
 132         movd            s4,t3
 133         movd            s3,t4
 134         punpcklqdq      t4,t3
 135         pmuludq         h23,t3
 136         paddq           t3,t2
 137         # t3[0] = h4 * s1
 138         # t3[1] = h4 * s2
 139         movd            s1,t3
 140         movd            s2,t4
 141         punpcklqdq      t4,t3
 142         pmuludq         h44,t3
 143         # d0 = t1[0] + t1[1] + t3[0]
 144         # d1 = t2[0] + t2[1] + t3[1]
 145         movdqa          t1,t4
 146         punpcklqdq      t2,t4
 147         punpckhqdq      t2,t1
 148         paddq           t4,t1
 149         paddq           t3,t1
 150         movq            t1,d0
 151         psrldq          $8,t1
 152         movq            t1,d1
 153 
 154         # t1[0] = h0 * r2 + h2 * r0
 155         # t1[1] = h1 * r1 + h3 * s4
 156         movd            r2,t1
 157         movd            r1,t2
 158         punpcklqdq      t2,t1
 159         pmuludq         h01,t1
 160         movd            r0,t2
 161         movd            s4,t3
 162         punpcklqdq      t3,t2
 163         pmuludq         h23,t2
 164         paddq           t2,t1
 165         # t2[0] = h0 * r3 + h2 * r1
 166         # t2[1] = h1 * r2 + h3 * r0
 167         movd            r3,t2
 168         movd            r2,t3
 169         punpcklqdq      t3,t2
 170         pmuludq         h01,t2
 171         movd            r1,t3
 172         movd            r0,t4
 173         punpcklqdq      t4,t3
 174         pmuludq         h23,t3
 175         paddq           t3,t2
 176         # t3[0] = h4 * s3
 177         # t3[1] = h4 * s4
 178         movd            s3,t3
 179         movd            s4,t4
 180         punpcklqdq      t4,t3
 181         pmuludq         h44,t3
 182         # d2 = t1[0] + t1[1] + t3[0]
 183         # d3 = t2[0] + t2[1] + t3[1]
 184         movdqa          t1,t4
 185         punpcklqdq      t2,t4
 186         punpckhqdq      t2,t1
 187         paddq           t4,t1
 188         paddq           t3,t1
 189         movq            t1,d2
 190         psrldq          $8,t1
 191         movq            t1,d3
 192 
 193         # t1[0] = h0 * r4 + h2 * r2
 194         # t1[1] = h1 * r3 + h3 * r1
 195         movd            r4,t1
 196         movd            r3,t2
 197         punpcklqdq      t2,t1
 198         pmuludq         h01,t1
 199         movd            r2,t2
 200         movd            r1,t3
 201         punpcklqdq      t3,t2
 202         pmuludq         h23,t2
 203         paddq           t2,t1
 204         # t3[0] = h4 * r0
 205         movd            r0,t3
 206         pmuludq         h44,t3
 207         # d4 = t1[0] + t1[1] + t3[0]
 208         movdqa          t1,t4
 209         psrldq          $8,t4
 210         paddq           t4,t1
 211         paddq           t3,t1
 212         movq            t1,d4
 213 
 214         # d1 += d0 >> 26
 215         mov             d0,%rax
 216         shr             $26,%rax
 217         add             %rax,d1
 218         # h0 = d0 & 0x3ffffff
 219         mov             d0,%rbx
 220         and             $0x3ffffff,%ebx
 221 
 222         # d2 += d1 >> 26
 223         mov             d1,%rax
 224         shr             $26,%rax
 225         add             %rax,d2
 226         # h1 = d1 & 0x3ffffff
 227         mov             d1,%rax
 228         and             $0x3ffffff,%eax
 229         mov             %eax,h1
 230 
 231         # d3 += d2 >> 26
 232         mov             d2,%rax
 233         shr             $26,%rax
 234         add             %rax,d3
 235         # h2 = d2 & 0x3ffffff
 236         mov             d2,%rax
 237         and             $0x3ffffff,%eax
 238         mov             %eax,h2
 239 
 240         # d4 += d3 >> 26
 241         mov             d3,%rax
 242         shr             $26,%rax
 243         add             %rax,d4
 244         # h3 = d3 & 0x3ffffff
 245         mov             d3,%rax
 246         and             $0x3ffffff,%eax
 247         mov             %eax,h3
 248 
 249         # h0 += (d4 >> 26) * 5
 250         mov             d4,%rax
 251         shr             $26,%rax
 252         lea             (%rax,%rax,4),%rax
 253         add             %rax,%rbx
 254         # h4 = d4 & 0x3ffffff
 255         mov             d4,%rax
 256         and             $0x3ffffff,%eax
 257         mov             %eax,h4
 258 
 259         # h1 += h0 >> 26
 260         mov             %rbx,%rax
 261         shr             $26,%rax
 262         add             %eax,h1
 263         # h0 = h0 & 0x3ffffff
 264         andl            $0x3ffffff,%ebx
 265         mov             %ebx,h0
 266 
 267         add             $0x10,m
 268         dec             %rcx
 269         jnz             .Ldoblock
 270 
 271         # Zeroing of key material
 272         mov             %rcx,0x00(%rsp)
 273         mov             %rcx,0x08(%rsp)
 274 
 275         add             $0x10,%rsp
 276         pop             %r12
 277         pop             %rbx
 278         ret
 279 ENDPROC(poly1305_block_sse2)
 280 
 281 
 282 #define u0 0x00(%r8)
 283 #define u1 0x04(%r8)
 284 #define u2 0x08(%r8)
 285 #define u3 0x0c(%r8)
 286 #define u4 0x10(%r8)
 287 #define hc0 %xmm0
 288 #define hc1 %xmm1
 289 #define hc2 %xmm2
 290 #define hc3 %xmm5
 291 #define hc4 %xmm6
 292 #define ru0 %xmm7
 293 #define ru1 %xmm8
 294 #define ru2 %xmm9
 295 #define ru3 %xmm10
 296 #define ru4 %xmm11
 297 #define sv1 %xmm12
 298 #define sv2 %xmm13
 299 #define sv3 %xmm14
 300 #define sv4 %xmm15
 301 #undef d0
 302 #define d0 %r13
 303 
 304 ENTRY(poly1305_2block_sse2)
 305         # %rdi: Accumulator h[5]
 306         # %rsi: 16 byte input block m
 307         # %rdx: Poly1305 key r[5]
 308         # %rcx: Doubleblock count
 309         # %r8:  Poly1305 derived key r^2 u[5]
 310 
 311         # This two-block variant further improves performance by using loop
 312         # unrolled block processing. This is more straight forward and does
 313         # less byte shuffling, but requires a second Poly1305 key r^2:
 314         # h = (h + m) * r    =>    h = (h + m1) * r^2 + m2 * r
 315 
 316         push            %rbx
 317         push            %r12
 318         push            %r13
 319 
 320         # combine r0,u0
 321         movd            u0,ru0
 322         movd            r0,t1
 323         punpcklqdq      t1,ru0
 324 
 325         # combine r1,u1 and s1=r1*5,v1=u1*5
 326         movd            u1,ru1
 327         movd            r1,t1
 328         punpcklqdq      t1,ru1
 329         movdqa          ru1,sv1
 330         pslld           $2,sv1
 331         paddd           ru1,sv1
 332 
 333         # combine r2,u2 and s2=r2*5,v2=u2*5
 334         movd            u2,ru2
 335         movd            r2,t1
 336         punpcklqdq      t1,ru2
 337         movdqa          ru2,sv2
 338         pslld           $2,sv2
 339         paddd           ru2,sv2
 340 
 341         # combine r3,u3 and s3=r3*5,v3=u3*5
 342         movd            u3,ru3
 343         movd            r3,t1
 344         punpcklqdq      t1,ru3
 345         movdqa          ru3,sv3
 346         pslld           $2,sv3
 347         paddd           ru3,sv3
 348 
 349         # combine r4,u4 and s4=r4*5,v4=u4*5
 350         movd            u4,ru4
 351         movd            r4,t1
 352         punpcklqdq      t1,ru4
 353         movdqa          ru4,sv4
 354         pslld           $2,sv4
 355         paddd           ru4,sv4
 356 
 357 .Ldoblock2:
 358         # hc0 = [ m[16-19] & 0x3ffffff, h0 + m[0-3] & 0x3ffffff ]
 359         movd            0x00(m),hc0
 360         movd            0x10(m),t1
 361         punpcklqdq      t1,hc0
 362         pand            ANMASK(%rip),hc0
 363         movd            h0,t1
 364         paddd           t1,hc0
 365         # hc1 = [ (m[19-22] >> 2) & 0x3ffffff, h1 + (m[3-6] >> 2) & 0x3ffffff ]
 366         movd            0x03(m),hc1
 367         movd            0x13(m),t1
 368         punpcklqdq      t1,hc1
 369         psrld           $2,hc1
 370         pand            ANMASK(%rip),hc1
 371         movd            h1,t1
 372         paddd           t1,hc1
 373         # hc2 = [ (m[22-25] >> 4) & 0x3ffffff, h2 + (m[6-9] >> 4) & 0x3ffffff ]
 374         movd            0x06(m),hc2
 375         movd            0x16(m),t1
 376         punpcklqdq      t1,hc2
 377         psrld           $4,hc2
 378         pand            ANMASK(%rip),hc2
 379         movd            h2,t1
 380         paddd           t1,hc2
 381         # hc3 = [ (m[25-28] >> 6) & 0x3ffffff, h3 + (m[9-12] >> 6) & 0x3ffffff ]
 382         movd            0x09(m),hc3
 383         movd            0x19(m),t1
 384         punpcklqdq      t1,hc3
 385         psrld           $6,hc3
 386         pand            ANMASK(%rip),hc3
 387         movd            h3,t1
 388         paddd           t1,hc3
 389         # hc4 = [ (m[28-31] >> 8) | (1<<24), h4 + (m[12-15] >> 8) | (1<<24) ]
 390         movd            0x0c(m),hc4
 391         movd            0x1c(m),t1
 392         punpcklqdq      t1,hc4
 393         psrld           $8,hc4
 394         por             ORMASK(%rip),hc4
 395         movd            h4,t1
 396         paddd           t1,hc4
 397 
 398         # t1 = [ hc0[1] * r0, hc0[0] * u0 ]
 399         movdqa          ru0,t1
 400         pmuludq         hc0,t1
 401         # t1 += [ hc1[1] * s4, hc1[0] * v4 ]
 402         movdqa          sv4,t2
 403         pmuludq         hc1,t2
 404         paddq           t2,t1
 405         # t1 += [ hc2[1] * s3, hc2[0] * v3 ]
 406         movdqa          sv3,t2
 407         pmuludq         hc2,t2
 408         paddq           t2,t1
 409         # t1 += [ hc3[1] * s2, hc3[0] * v2 ]
 410         movdqa          sv2,t2
 411         pmuludq         hc3,t2
 412         paddq           t2,t1
 413         # t1 += [ hc4[1] * s1, hc4[0] * v1 ]
 414         movdqa          sv1,t2
 415         pmuludq         hc4,t2
 416         paddq           t2,t1
 417         # d0 = t1[0] + t1[1]
 418         movdqa          t1,t2
 419         psrldq          $8,t2
 420         paddq           t2,t1
 421         movq            t1,d0
 422 
 423         # t1 = [ hc0[1] * r1, hc0[0] * u1 ]
 424         movdqa          ru1,t1
 425         pmuludq         hc0,t1
 426         # t1 += [ hc1[1] * r0, hc1[0] * u0 ]
 427         movdqa          ru0,t2
 428         pmuludq         hc1,t2
 429         paddq           t2,t1
 430         # t1 += [ hc2[1] * s4, hc2[0] * v4 ]
 431         movdqa          sv4,t2
 432         pmuludq         hc2,t2
 433         paddq           t2,t1
 434         # t1 += [ hc3[1] * s3, hc3[0] * v3 ]
 435         movdqa          sv3,t2
 436         pmuludq         hc3,t2
 437         paddq           t2,t1
 438         # t1 += [ hc4[1] * s2, hc4[0] * v2 ]
 439         movdqa          sv2,t2
 440         pmuludq         hc4,t2
 441         paddq           t2,t1
 442         # d1 = t1[0] + t1[1]
 443         movdqa          t1,t2
 444         psrldq          $8,t2
 445         paddq           t2,t1
 446         movq            t1,d1
 447 
 448         # t1 = [ hc0[1] * r2, hc0[0] * u2 ]
 449         movdqa          ru2,t1
 450         pmuludq         hc0,t1
 451         # t1 += [ hc1[1] * r1, hc1[0] * u1 ]
 452         movdqa          ru1,t2
 453         pmuludq         hc1,t2
 454         paddq           t2,t1
 455         # t1 += [ hc2[1] * r0, hc2[0] * u0 ]
 456         movdqa          ru0,t2
 457         pmuludq         hc2,t2
 458         paddq           t2,t1
 459         # t1 += [ hc3[1] * s4, hc3[0] * v4 ]
 460         movdqa          sv4,t2
 461         pmuludq         hc3,t2
 462         paddq           t2,t1
 463         # t1 += [ hc4[1] * s3, hc4[0] * v3 ]
 464         movdqa          sv3,t2
 465         pmuludq         hc4,t2
 466         paddq           t2,t1
 467         # d2 = t1[0] + t1[1]
 468         movdqa          t1,t2
 469         psrldq          $8,t2
 470         paddq           t2,t1
 471         movq            t1,d2
 472 
 473         # t1 = [ hc0[1] * r3, hc0[0] * u3 ]
 474         movdqa          ru3,t1
 475         pmuludq         hc0,t1
 476         # t1 += [ hc1[1] * r2, hc1[0] * u2 ]
 477         movdqa          ru2,t2
 478         pmuludq         hc1,t2
 479         paddq           t2,t1
 480         # t1 += [ hc2[1] * r1, hc2[0] * u1 ]
 481         movdqa          ru1,t2
 482         pmuludq         hc2,t2
 483         paddq           t2,t1
 484         # t1 += [ hc3[1] * r0, hc3[0] * u0 ]
 485         movdqa          ru0,t2
 486         pmuludq         hc3,t2
 487         paddq           t2,t1
 488         # t1 += [ hc4[1] * s4, hc4[0] * v4 ]
 489         movdqa          sv4,t2
 490         pmuludq         hc4,t2
 491         paddq           t2,t1
 492         # d3 = t1[0] + t1[1]
 493         movdqa          t1,t2
 494         psrldq          $8,t2
 495         paddq           t2,t1
 496         movq            t1,d3
 497 
 498         # t1 = [ hc0[1] * r4, hc0[0] * u4 ]
 499         movdqa          ru4,t1
 500         pmuludq         hc0,t1
 501         # t1 += [ hc1[1] * r3, hc1[0] * u3 ]
 502         movdqa          ru3,t2
 503         pmuludq         hc1,t2
 504         paddq           t2,t1
 505         # t1 += [ hc2[1] * r2, hc2[0] * u2 ]
 506         movdqa          ru2,t2
 507         pmuludq         hc2,t2
 508         paddq           t2,t1
 509         # t1 += [ hc3[1] * r1, hc3[0] * u1 ]
 510         movdqa          ru1,t2
 511         pmuludq         hc3,t2
 512         paddq           t2,t1
 513         # t1 += [ hc4[1] * r0, hc4[0] * u0 ]
 514         movdqa          ru0,t2
 515         pmuludq         hc4,t2
 516         paddq           t2,t1
 517         # d4 = t1[0] + t1[1]
 518         movdqa          t1,t2
 519         psrldq          $8,t2
 520         paddq           t2,t1
 521         movq            t1,d4
 522 
 523         # Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
 524         # h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
 525         # amount.  Careful: we must not assume the carry bits 'd0 >> 26',
 526         # 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
 527         # integers.  It's true in a single-block implementation, but not here.
 528 
 529         # d1 += d0 >> 26
 530         mov             d0,%rax
 531         shr             $26,%rax
 532         add             %rax,d1
 533         # h0 = d0 & 0x3ffffff
 534         mov             d0,%rbx
 535         and             $0x3ffffff,%ebx
 536 
 537         # d2 += d1 >> 26
 538         mov             d1,%rax
 539         shr             $26,%rax
 540         add             %rax,d2
 541         # h1 = d1 & 0x3ffffff
 542         mov             d1,%rax
 543         and             $0x3ffffff,%eax
 544         mov             %eax,h1
 545 
 546         # d3 += d2 >> 26
 547         mov             d2,%rax
 548         shr             $26,%rax
 549         add             %rax,d3
 550         # h2 = d2 & 0x3ffffff
 551         mov             d2,%rax
 552         and             $0x3ffffff,%eax
 553         mov             %eax,h2
 554 
 555         # d4 += d3 >> 26
 556         mov             d3,%rax
 557         shr             $26,%rax
 558         add             %rax,d4
 559         # h3 = d3 & 0x3ffffff
 560         mov             d3,%rax
 561         and             $0x3ffffff,%eax
 562         mov             %eax,h3
 563 
 564         # h0 += (d4 >> 26) * 5
 565         mov             d4,%rax
 566         shr             $26,%rax
 567         lea             (%rax,%rax,4),%rax
 568         add             %rax,%rbx
 569         # h4 = d4 & 0x3ffffff
 570         mov             d4,%rax
 571         and             $0x3ffffff,%eax
 572         mov             %eax,h4
 573 
 574         # h1 += h0 >> 26
 575         mov             %rbx,%rax
 576         shr             $26,%rax
 577         add             %eax,h1
 578         # h0 = h0 & 0x3ffffff
 579         andl            $0x3ffffff,%ebx
 580         mov             %ebx,h0
 581 
 582         add             $0x20,m
 583         dec             %rcx
 584         jnz             .Ldoblock2
 585 
 586         pop             %r13
 587         pop             %r12
 588         pop             %rbx
 589         ret
 590 ENDPROC(poly1305_2block_sse2)
/* [<][>][^][v][top][bottom][index][help] */
root/arch/x86/crypto/poly1305-sse2-x86_64.S
