crypto/poly1305/asm/poly1305-x86.pl

   1 #!/usr/bin/env perl
   2 #
   3 # ====================================================================
   4 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
   5 # project. The module is, however, dual licensed under OpenSSL and
   6 # CRYPTOGAMS licenses depending on where you obtain it. For further
   7 # details see http://www.openssl.org/~appro/cryptogams/.
   8 # ====================================================================
   9 #
  10 # This module implements Poly1305 hash for x86.
  11 #
  12 # April 2015
  13 #
  14 # Numbers are cycles per processed byte with poly1305_blocks alone,
  15 # measured with rdtsc at fixed clock frequency.
  16 #
  17 #               IALU/gcc-3.4(*) SSE2(**)        AVX2
  18 # Pentium       15.7/+80%       -
  19 # PIII          6.21/+90%       -
  20 # P4            19.8/+40%       3.24
  21 # Core 2        4.85/+90%       1.80
  22 # Westmere      4.58/+100%      1.43
  23 # Sandy Bridge  3.90/+100%      1.36
  24 # Haswell       3.88/+70%       1.18            0.72
  25 # Silvermont    11.0/+40%       4.80
  26 # VIA Nano      6.71/+90%       2.47
  27 # Sledgehammer  3.51/+180%      4.27
  28 # Bulldozer     4.53/+140%      1.31
  29 #
  30 # (*)   gcc 4.8 for some reason generated worse code;
  31 # (**)  besides SSE2 there are floating-point and AVX options; FP
  32 #       is deemed unnecessary, because pre-SSE2 processor are too
  33 #       old to care about, while it's not the fastest option on
  34 #       SSE2-capable ones; AVX is omitted, because it doesn't give
  35 #       a lot of improvement, 5-10% depending on processor;
  36
  37 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  38 push(@INC,"${dir}","${dir}../../perlasm");
  39 require "x86asm.pl";
  40
  41 $output=pop;
  42 open STDOUT,">$output";
  43
  44 &asm_init($ARGV[0],"poly1305-x86.pl",$ARGV[$#ARGV] eq "386");
  45
  46 $sse2=$avx=0;
  47 for (@ARGV) { $sse2=1 if (/-DOPENSSL_IA32_SSE2/); }
  48
  49 if ($sse2) {
  50         &static_label("const_sse2");
  51         &static_label("enter_blocks");
  52         &static_label("enter_emit");
  53         &external_label("OPENSSL_ia32cap_P");
  54
  55         if (`$ENV{CC} -Wa,-v -c -o /dev/null -x assembler /dev/null 2>&1`
  56                         =~ /GNU assembler version ([2-9]\.[0-9]+)/) {
  57                 $avx = ($1>=2.19) + ($1>=2.22);
  58         }
  59
  60         if (!$avx && $ARGV[0] eq "win32n" &&
  61            `nasm -v 2>&1` =~ /NASM version ([2-9]\.[0-9]+)/) {
  62         $avx = ($1>=2.09) + ($1>=2.10);
  63         }
  64
  65         if (!$avx && `$ENV{CC} -v 2>&1` =~ /(^clang version|based on LLVM) ([3-9]\.[0-9]+)/) {
  66                 $avx = ($2>=3.0) + ($2>3.0);
  67         }
  68 }
  69
  70 ########################################################################
  71 # Layout of opaque area is following.
  72 #
  73 #       unsigned __int32 h[5];          # current hash value base 2^32
  74 #       unsigned __int32 pad;           # is_base2_26 in vector context
  75 #       unsigned __int32 r[4];          # key value base 2^32
  76
  77 &align(64);
  78 &function_begin("poly1305_init");
  79         &mov    ("edi",&wparam(0));             # context
  80         &mov    ("esi",&wparam(1));             # key
  81         &mov    ("ebp",&wparam(2));             # function table
  82
  83         &xor    ("eax","eax");
  84         &mov    (&DWP(4*0,"edi"),"eax");        # zero hash value
  85         &mov    (&DWP(4*1,"edi"),"eax");
  86         &mov    (&DWP(4*2,"edi"),"eax");
  87         &mov    (&DWP(4*3,"edi"),"eax");
  88         &mov    (&DWP(4*4,"edi"),"eax");
  89         &mov    (&DWP(4*5,"edi"),"eax");        # is_base2_26
  90
  91         &cmp    ("esi",0);
  92         &je     (&label("nokey"));
  93
  94     if ($sse2) {
  95         &call   (&label("pic_point"));
  96     &set_label("pic_point");
  97         &blindpop("ebx");
  98
  99         &lea    ("eax",&DWP("poly1305_blocks-".&label("pic_point"),"ebx"));
 100         &lea    ("edx",&DWP("poly1305_emit-".&label("pic_point"),"ebx"));
 101
 102         &picmeup("edi","OPENSSL_ia32cap_P","ebx",&label("pic_point"));
 103         &mov    ("ecx",&DWP(0,"edi"));
 104         &and    ("ecx",1<<26|1<<24);
 105         &cmp    ("ecx",1<<26|1<<24);            # SSE2 and XMM?
 106         &jne    (&label("no_sse2"));
 107
 108         &lea    ("eax",&DWP("_poly1305_blocks_sse2-".&label("pic_point"),"ebx"));
 109         &lea    ("edx",&DWP("_poly1305_emit_sse2-".&label("pic_point"),"ebx"));
 110
 111       if ($avx>1) {
 112         &mov    ("ecx",&DWP(8,"edi"));
 113         &test   ("ecx",1<<5);                   # AVX2?
 114         &jz     (&label("no_sse2"));
 115
 116         &lea    ("eax",&DWP("_poly1305_blocks_avx2-".&label("pic_point"),"ebx"));
 117       }
 118     &set_label("no_sse2");
 119         &mov    ("edi",&wparam(0));             # reload context
 120         &mov    (&DWP(0,"ebp"),"eax");          # fill function table
 121         &mov    (&DWP(4,"ebp"),"edx");
 122     }
 123
 124         &mov    ("eax",&DWP(4*0,"esi"));        # load input key
 125         &mov    ("ebx",&DWP(4*1,"esi"));
 126         &mov    ("ecx",&DWP(4*2,"esi"));
 127         &mov    ("edx",&DWP(4*3,"esi"));
 128         &and    ("eax",0x0fffffff);
 129         &and    ("ebx",0x0ffffffc);
 130         &and    ("ecx",0x0ffffffc);
 131         &and    ("edx",0x0ffffffc);
 132         &mov    (&DWP(4*6,"edi"),"eax");
 133         &mov    (&DWP(4*7,"edi"),"ebx");
 134         &mov    (&DWP(4*8,"edi"),"ecx");
 135         &mov    (&DWP(4*9,"edi"),"edx");
 136
 137         &mov    ("eax",$sse2);
 138 &set_label("nokey");
 139 &function_end("poly1305_init");
 140
 141 ($h0,$h1,$h2,$h3,$h4,
 142  $d0,$d1,$d2,$d3,
 143  $r0,$r1,$r2,$r3,
 144      $s1,$s2,$s3)=map(4*$_,(0..15));
 145
 146 &function_begin("poly1305_blocks");
 147         &mov    ("edi",&wparam(0));             # ctx
 148         &mov    ("esi",&wparam(1));             # inp
 149         &mov    ("ecx",&wparam(2));             # len
 150 &set_label("enter_blocks");
 151         &and    ("ecx",-15);
 152         &jz     (&label("nodata"));
 153
 154         &stack_push(16);
 155         &mov    ("eax",&DWP(4*6,"edi"));        # r0
 156         &mov    ("ebx",&DWP(4*7,"edi"));        # r1
 157          &lea   ("ebp",&DWP(0,"esi","ecx"));    # end of input
 158         &mov    ("ecx",&DWP(4*8,"edi"));        # r2
 159         &mov    ("edx",&DWP(4*9,"edi"));        # r3
 160
 161         &mov    (&wparam(2),"ebp");
 162         &mov    ("ebp","esi");
 163
 164         &mov    (&DWP($r0,"esp"),"eax");        # r0
 165         &mov    ("eax","ebx");
 166         &shr    ("eax",2);
 167         &mov    (&DWP($r1,"esp"),"ebx");        # r1
 168         &add    ("eax","ebx");                  # s1
 169         &mov    ("ebx","ecx");
 170         &shr    ("ebx",2);
 171         &mov    (&DWP($r2,"esp"),"ecx");        # r2
 172         &add    ("ebx","ecx");                  # s2
 173         &mov    ("ecx","edx");
 174         &shr    ("ecx",2);
 175         &mov    (&DWP($r3,"esp"),"edx");        # r3
 176         &add    ("ecx","edx");                  # s3
 177         &mov    (&DWP($s1,"esp"),"eax");        # s1
 178         &mov    (&DWP($s2,"esp"),"ebx");        # s2
 179         &mov    (&DWP($s3,"esp"),"ecx");        # s3
 180
 181         &mov    ("eax",&DWP(4*0,"edi"));        # load hash value
 182         &mov    ("ebx",&DWP(4*1,"edi"));
 183         &mov    ("ecx",&DWP(4*2,"edi"));
 184         &mov    ("esi",&DWP(4*3,"edi"));
 185         &mov    ("edi",&DWP(4*4,"edi"));
 186         &jmp    (&label("loop"));
 187
 188 &set_label("loop",32);
 189         &add    ("eax",&DWP(4*0,"ebp"));        # accumulate input
 190         &adc    ("ebx",&DWP(4*1,"ebp"));
 191         &adc    ("ecx",&DWP(4*2,"ebp"));
 192         &adc    ("esi",&DWP(4*3,"ebp"));
 193         &lea    ("ebp",&DWP(4*4,"ebp"));
 194         &adc    ("edi",&wparam(3));             # padbit
 195
 196         &mov    (&DWP($h0,"esp"),"eax");        # put aside hash[+inp]
 197         &mov    (&DWP($h3,"esp"),"esi");
 198
 199         &mul    (&DWP($r0,"esp"));              # h0*r0
 200          &mov   (&DWP($h4,"esp"),"edi");
 201         &mov    ("edi","eax");
 202         &mov    ("eax","ebx");                  # h1
 203         &mov    ("esi","edx");
 204         &mul    (&DWP($s3,"esp"));              # h1*s3
 205         &add    ("edi","eax");
 206         &mov    ("eax","ecx");                  # h2
 207         &adc    ("esi","edx");
 208         &mul    (&DWP($s2,"esp"));              # h2*s2
 209         &add    ("edi","eax");
 210         &mov    ("eax",&DWP($h3,"esp"));
 211         &adc    ("esi","edx");
 212         &mul    (&DWP($s1,"esp"));              # h3*s1
 213         &add    ("edi","eax");
 214          &mov   ("eax",&DWP($h0,"esp"));
 215         &adc    ("esi","edx");
 216
 217         &mul    (&DWP($r1,"esp"));              # h0*r1
 218          &mov   (&DWP($d0,"esp"),"edi");
 219         &xor    ("edi","edi");
 220         &add    ("esi","eax");
 221         &mov    ("eax","ebx");                  # h1
 222         &adc    ("edi","edx");
 223         &mul    (&DWP($r0,"esp"));              # h1*r0
 224         &add    ("esi","eax");
 225         &mov    ("eax","ecx");                  # h2
 226         &adc    ("edi","edx");
 227         &mul    (&DWP($s3,"esp"));              # h2*s3
 228         &add    ("esi","eax");
 229         &mov    ("eax",&DWP($h3,"esp"));
 230         &adc    ("edi","edx");
 231         &mul    (&DWP($s2,"esp"));              # h3*s2
 232         &add    ("esi","eax");
 233         &mov    ("eax",&DWP($h4,"esp"));
 234         &adc    ("edi","edx");
 235         &imul   ("eax",&DWP($s1,"esp"));        # h4*s1
 236         &add    ("esi","eax");
 237          &mov   ("eax",&DWP($h0,"esp"));
 238         &adc    ("edi",0);
 239
 240         &mul    (&DWP($r2,"esp"));              # h0*r2
 241          &mov   (&DWP($d1,"esp"),"esi");
 242         &xor    ("esi","esi");
 243         &add    ("edi","eax");
 244         &mov    ("eax","ebx");                  # h1
 245         &adc    ("esi","edx");
 246         &mul    (&DWP($r1,"esp"));              # h1*r1
 247         &add    ("edi","eax");
 248         &mov    ("eax","ecx");                  # h2
 249         &adc    ("esi","edx");
 250         &mul    (&DWP($r0,"esp"));              # h2*r0
 251         &add    ("edi","eax");
 252         &mov    ("eax",&DWP($h3,"esp"));
 253         &adc    ("esi","edx");
 254         &mul    (&DWP($s3,"esp"));              # h3*s3
 255         &add    ("edi","eax");
 256         &mov    ("eax",&DWP($h4,"esp"));
 257         &adc    ("esi","edx");
 258         &imul   ("eax",&DWP($s2,"esp"));        # h4*s2
 259         &add    ("edi","eax");
 260          &mov   ("eax",&DWP($h0,"esp"));
 261         &adc    ("esi",0);
 262
 263         &mul    (&DWP($r3,"esp"));              # h0*r3
 264          &mov   (&DWP($d2,"esp"),"edi");
 265         &xor    ("edi","edi");
 266         &add    ("esi","eax");
 267         &mov    ("eax","ebx");                  # h1
 268         &adc    ("edi","edx");
 269         &mul    (&DWP($r2,"esp"));              # h1*r2
 270         &add    ("esi","eax");
 271         &mov    ("eax","ecx");                  # h2
 272         &adc    ("edi","edx");
 273         &mul    (&DWP($r1,"esp"));              # h2*r1
 274         &add    ("esi","eax");
 275         &mov    ("eax",&DWP($h3,"esp"));
 276         &adc    ("edi","edx");
 277         &mul    (&DWP($r0,"esp"));              # h3*r0
 278         &add    ("esi","eax");
 279          &mov   ("ecx",&DWP($h4,"esp"));
 280         &adc    ("edi","edx");
 281
 282         &mov    ("edx","ecx");
 283         &imul   ("ecx",&DWP($s3,"esp"));        # h4*s3
 284         &add    ("esi","ecx");
 285          &mov   ("eax",&DWP($d0,"esp"));
 286         &adc    ("edi",0);
 287
 288         &imul   ("edx",&DWP($r0,"esp"));        # h4*r0
 289         &add    ("edx","edi");
 290
 291         &mov    ("ebx",&DWP($d1,"esp"));
 292         &mov    ("ecx",&DWP($d2,"esp"));
 293
 294         &mov    ("edi","edx");                  # last reduction step
 295         &shr    ("edx",2);
 296         &and    ("edi",3);
 297         &lea    ("edx",&DWP(0,"edx","edx",4));  # *5
 298         &add    ("eax","edx");
 299         &adc    ("ebx",0);
 300         &adc    ("ecx",0);
 301         &adc    ("esi",0);
 302
 303         &cmp    ("ebp",&wparam(2));             # done yet?
 304         &jne    (&label("loop"));
 305
 306         &mov    ("edx",&wparam(0));             # ctx
 307         &stack_pop(16);
 308         &mov    (&DWP(4*0,"edx"),"eax");        # store hash value
 309         &mov    (&DWP(4*1,"edx"),"ebx");
 310         &mov    (&DWP(4*2,"edx"),"ecx");
 311         &mov    (&DWP(4*3,"edx"),"esi");
 312         &mov    (&DWP(4*4,"edx"),"edi");
 313 &set_label("nodata");
 314 &function_end("poly1305_blocks");
 315
 316 &function_begin("poly1305_emit");
 317         &mov    ("ebp",&wparam(0));             # context
 318 &set_label("enter_emit");
 319         &mov    ("edi",&wparam(1));             # output
 320         &mov    ("eax",&DWP(4*0,"ebp"));        # load hash value
 321         &mov    ("ebx",&DWP(4*1,"ebp"));
 322         &mov    ("ecx",&DWP(4*2,"ebp"));
 323         &mov    ("edx",&DWP(4*3,"ebp"));
 324         &mov    ("esi",&DWP(4*4,"ebp"));
 325
 326         &add    ("eax",5);                      # compare to modulus
 327         &adc    ("ebx",0);
 328         &adc    ("ecx",0);
 329         &adc    ("edx",0);
 330         &adc    ("esi",0);
 331         &shr    ("esi",2);                      # did it carry/borrow?
 332         &neg    ("esi");                        # do we choose hash-modulus?
 333
 334         &and    ("eax","esi");
 335         &and    ("ebx","esi");
 336         &and    ("ecx","esi");
 337         &and    ("edx","esi");
 338         &mov    (&DWP(4*0,"edi"),"eax");
 339         &mov    (&DWP(4*1,"edi"),"ebx");
 340         &mov    (&DWP(4*2,"edi"),"ecx");
 341         &mov    (&DWP(4*3,"edi"),"edx");
 342
 343         &not    ("esi");                        # or original hash value?
 344         &mov    ("eax",&DWP(4*0,"ebp"));
 345         &mov    ("ebx",&DWP(4*1,"ebp"));
 346         &mov    ("ecx",&DWP(4*2,"ebp"));
 347         &mov    ("edx",&DWP(4*3,"ebp"));
 348         &mov    ("ebp",&wparam(2));
 349         &and    ("eax","esi");
 350         &and    ("ebx","esi");
 351         &and    ("ecx","esi");
 352         &and    ("edx","esi");
 353         &or     ("eax",&DWP(4*0,"edi"));
 354         &or     ("ebx",&DWP(4*1,"edi"));
 355         &or     ("ecx",&DWP(4*2,"edi"));
 356         &or     ("edx",&DWP(4*3,"edi"));
 357
 358         &add    ("eax",&DWP(4*0,"ebp"));        # accumulate key
 359         &adc    ("ebx",&DWP(4*1,"ebp"));
 360         &adc    ("ecx",&DWP(4*2,"ebp"));
 361         &adc    ("edx",&DWP(4*3,"ebp"));
 362
 363         &mov    (&DWP(4*0,"edi"),"eax");
 364         &mov    (&DWP(4*1,"edi"),"ebx");
 365         &mov    (&DWP(4*2,"edi"),"ecx");
 366         &mov    (&DWP(4*3,"edi"),"edx");
 367 &function_end("poly1305_emit");
 368
 369 if ($sse2) {
 370 ########################################################################
 371 # Layout of opaque area is following.
 372 #
 373 #       unsigned __int32 h[5];          # current hash value base 2^26
 374 #       unsigned __int32 is_base2_26;
 375 #       unsigned __int32 r[4];          # key value base 2^32
 376 #       unsigned __int32 pad[2];
 377 #       struct { unsigned __int32 r^4, r^3, r^2, r^1; } r[9];
 378 #
 379 # where r^n are base 2^26 digits of degrees of multiplier key. There are
 380 # 5 digits, but last four are interleaved with multiples of 5, totalling
 381 # in 9 elements: r0, r1, 5*r1, r2, 5*r2, r3, 5*r3, r4, 5*r4.
 382
 383 my ($D0,$D1,$D2,$D3,$D4,$T0,$T1,$T2)=map("xmm$_",(0..7));
 384 my $MASK=$T2;   # borrow and keep in mind
 385
 386 &align  (32);
 387 &function_begin_B("_poly1305_init_sse2");
 388         &movdqu         ($D4,&QWP(4*6,"edi"));          # key base 2^32
 389         &lea            ("edi",&DWP(16*3,"edi"));       # size optimization
 390         &mov            ("ebp","esp");
 391         &sub            ("esp",16*(9+5));
 392         &and            ("esp",-16);
 393
 394         #&pand          ($D4,&QWP(96,"ebx"));           # magic mask
 395         &movq           ($MASK,&QWP(64,"ebx"));
 396
 397         &movdqa         ($D0,$D4);
 398         &movdqa         ($D1,$D4);
 399         &movdqa         ($D2,$D4);
 400
 401         &pand           ($D0,$MASK);                    # -> base 2^26
 402         &psrlq          ($D1,26);
 403         &psrldq         ($D2,6);
 404         &pand           ($D1,$MASK);
 405         &movdqa         ($D3,$D2);
 406         &psrlq          ($D2,4)
 407         &psrlq          ($D3,30);
 408         &pand           ($D2,$MASK);
 409         &pand           ($D3,$MASK);
 410         &psrldq         ($D4,13);
 411
 412         &lea            ("edx",&DWP(16*9,"esp"));       # size optimization
 413         &mov            ("ecx",2);
 414 &set_label("square");
 415         &movdqa         (&QWP(16*0,"esp"),$D0);
 416         &movdqa         (&QWP(16*1,"esp"),$D1);
 417         &movdqa         (&QWP(16*2,"esp"),$D2);
 418         &movdqa         (&QWP(16*3,"esp"),$D3);
 419         &movdqa         (&QWP(16*4,"esp"),$D4);
 420
 421         &movdqa         ($T1,$D1);
 422         &movdqa         ($T0,$D2);
 423         &pslld          ($T1,2);
 424         &pslld          ($T0,2);
 425         &paddd          ($T1,$D1);                      # *5
 426         &paddd          ($T0,$D2);                      # *5
 427         &movdqa         (&QWP(16*5,"esp"),$T1);
 428         &movdqa         (&QWP(16*6,"esp"),$T0);
 429         &movdqa         ($T1,$D3);
 430         &movdqa         ($T0,$D4);
 431         &pslld          ($T1,2);
 432         &pslld          ($T0,2);
 433         &paddd          ($T1,$D3);                      # *5
 434         &paddd          ($T0,$D4);                      # *5
 435         &movdqa         (&QWP(16*7,"esp"),$T1);
 436         &movdqa         (&QWP(16*8,"esp"),$T0);
 437
 438         &pshufd         ($T1,$D0,0b01000100);
 439         &movdqa         ($T0,$D1);
 440         &pshufd         ($D1,$D1,0b01000100);
 441         &pshufd         ($D2,$D2,0b01000100);
 442         &pshufd         ($D3,$D3,0b01000100);
 443         &pshufd         ($D4,$D4,0b01000100);
 444         &movdqa         (&QWP(16*0,"edx"),$T1);
 445         &movdqa         (&QWP(16*1,"edx"),$D1);
 446         &movdqa         (&QWP(16*2,"edx"),$D2);
 447         &movdqa         (&QWP(16*3,"edx"),$D3);
 448         &movdqa         (&QWP(16*4,"edx"),$D4);
 449
 450         ################################################################
 451         # d4 = h4*r0 + h3*r1   + h2*r2   + h1*r3   + h0*r4
 452         # d3 = h3*r0 + h2*r1   + h1*r2   + h0*r3   + h4*5*r4
 453         # d2 = h2*r0 + h1*r1   + h0*r2   + h4*5*r3 + h3*5*r4
 454         # d1 = h1*r0 + h0*r1   + h4*5*r2 + h3*5*r3 + h2*5*r4
 455         # d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
 456
 457         &pmuludq        ($D4,$D0);                      # h4*r0
 458         &pmuludq        ($D3,$D0);                      # h3*r0
 459         &pmuludq        ($D2,$D0);                      # h2*r0
 460         &pmuludq        ($D1,$D0);                      # h1*r0
 461         &pmuludq        ($D0,$T1);                      # h0*r0
 462
 463 sub pmuladd {
 464 my $load = shift;
 465 my $base = shift; $base = "esp" if (!defined($base));
 466
 467         ################################################################
 468         # As for choice to "rotate" $T0-$T2 in order to move paddq
 469         # past next multiplication. While it makes code harder to read
 470         # and doesn't have significant effect on most processors, it
 471         # makes a lot of difference on Atom, up to 30% improvement.
 472
 473         &movdqa         ($T1,$T0);
 474         &pmuludq        ($T0,&QWP(16*3,$base));         # r1*h3
 475         &movdqa         ($T2,$T1);
 476         &pmuludq        ($T1,&QWP(16*2,$base));         # r1*h2
 477         &paddq          ($D4,$T0);
 478         &movdqa         ($T0,$T2);
 479         &pmuludq        ($T2,&QWP(16*1,$base));         # r1*h1
 480         &paddq          ($D3,$T1);
 481         &$load          ($T1,5);                        # s1
 482         &pmuludq        ($T0,&QWP(16*0,$base));         # r1*h0
 483         &paddq          ($D2,$T2);
 484         &pmuludq        ($T1,&QWP(16*4,$base));         # s1*h4
 485          &$load         ($T2,2);                        # r2^n
 486         &paddq          ($D1,$T0);
 487
 488         &movdqa         ($T0,$T2);
 489         &pmuludq        ($T2,&QWP(16*2,$base));         # r2*h2
 490          &paddq         ($D0,$T1);
 491         &movdqa         ($T1,$T0);
 492         &pmuludq        ($T0,&QWP(16*1,$base));         # r2*h1
 493         &paddq          ($D4,$T2);
 494         &$load          ($T2,6);                        # s2^n
 495         &pmuludq        ($T1,&QWP(16*0,$base));         # r2*h0
 496         &paddq          ($D3,$T0);
 497         &movdqa         ($T0,$T2);
 498         &pmuludq        ($T2,&QWP(16*4,$base));         # s2*h4
 499         &paddq          ($D2,$T1);
 500         &pmuludq        ($T0,&QWP(16*3,$base));         # s2*h3
 501          &$load         ($T1,3);                        # r3^n
 502         &paddq          ($D1,$T2);
 503
 504         &movdqa         ($T2,$T1);
 505         &pmuludq        ($T1,&QWP(16*1,$base));         # r3*h1
 506          &paddq         ($D0,$T0);
 507         &$load          ($T0,7);                        # s3^n
 508         &pmuludq        ($T2,&QWP(16*0,$base));         # r3*h0
 509         &paddq          ($D4,$T1);
 510         &movdqa         ($T1,$T0);
 511         &pmuludq        ($T0,&QWP(16*4,$base));         # s3*h4
 512         &paddq          ($D3,$T2);
 513         &movdqa         ($T2,$T1);
 514         &pmuludq        ($T1,&QWP(16*3,$base));         # s3*h3
 515         &paddq          ($D2,$T0);
 516         &pmuludq        ($T2,&QWP(16*2,$base));         # s3*h2
 517          &$load         ($T0,4);                        # r4^n
 518         &paddq          ($D1,$T1);
 519
 520         &$load          ($T1,8);                        # s4^n
 521         &pmuludq        ($T0,&QWP(16*0,$base));         # r4*h0
 522          &paddq         ($D0,$T2);
 523         &movdqa         ($T2,$T1);
 524         &pmuludq        ($T1,&QWP(16*4,$base));         # s4*h4
 525         &paddq          ($D4,$T0);
 526         &movdqa         ($T0,$T2);
 527         &pmuludq        ($T2,&QWP(16*1,$base));         # s4*h1
 528         &paddq          ($D3,$T1);
 529         &movdqa         ($T1,$T0);
 530         &pmuludq        ($T0,&QWP(16*2,$base));         # s4*h2
 531         &paddq          ($D0,$T2);
 532         &pmuludq        ($T1,&QWP(16*3,$base));         # s4*h3
 533          &movdqa        ($MASK,&QWP(64,"ebx"));
 534         &paddq          ($D1,$T0);
 535         &paddq          ($D2,$T1);
 536 }
 537         &pmuladd        (sub {  my ($reg,$i)=@_;
 538                                 &movdqa ($reg,&QWP(16*$i,"esp"));
 539                              },"edx");
 540
 541 sub lazy_reduction {
 542 my $extra = shift;
 543 my $paddx = defined($extra) ? paddq : paddd;
 544
 545         ################################################################
 546         # lazy reduction as discussed in "NEON crypto" by D.J. Bernstein
 547         # and P. Schwabe
 548
 549          &movdqa        ($T0,$D3);
 550          &pand          ($D3,$MASK);
 551          &psrlq         ($T0,26);
 552          &$extra        ()                              if (defined($extra));
 553          &paddq         ($T0,$D4);                      # h3 -> h4
 554         &movdqa         ($T1,$D0);
 555         &pand           ($D0,$MASK);
 556         &psrlq          ($T1,26);
 557          &movdqa        ($D4,$T0);
 558         &paddq          ($T1,$D1);                      # h0 -> h1
 559          &psrlq         ($T0,26);
 560          &pand          ($D4,$MASK);
 561         &movdqa         ($D1,$T1);
 562         &psrlq          ($T1,26);
 563          &paddd         ($D0,$T0);                      # favour paddd when
 564                                                         # possible, because
 565                                                         # paddq is "broken"
 566                                                         # on Atom
 567          &psllq         ($T0,2);
 568         &paddq          ($T1,$D2);                      # h1 -> h2
 569          &$paddx        ($T0,$D0);                      # h4 -> h0
 570         &pand           ($D1,$MASK);
 571         &movdqa         ($D2,$T1);
 572         &psrlq          ($T1,26);
 573         &pand           ($D2,$MASK);
 574         &paddd          ($T1,$D3);                      # h2 -> h3
 575          &movdqa        ($D0,$T0);
 576          &psrlq         ($T0,26);
 577         &movdqa         ($D3,$T1);
 578         &psrlq          ($T1,26);
 579          &pand          ($D0,$MASK);
 580          &paddd         ($D1,$T0);                      # h0 -> h1
 581         &pand           ($D3,$MASK);
 582         &paddd          ($D4,$T1);                      # h3 -> h4
 583 }
 584         &lazy_reduction ();
 585
 586         &dec            ("ecx");
 587         &jz             (&label("square_break"));
 588
 589         &punpcklqdq     ($D0,&QWP(16*0,"esp"));         # 0:r^1:0:r^2
 590         &punpcklqdq     ($D1,&QWP(16*1,"esp"));
 591         &punpcklqdq     ($D2,&QWP(16*2,"esp"));
 592         &punpcklqdq     ($D3,&QWP(16*3,"esp"));
 593         &punpcklqdq     ($D4,&QWP(16*4,"esp"));
 594         &jmp            (&label("square"));
 595
 596 &set_label("square_break");
 597         &psllq          ($D0,32);                       # -> r^3:0:r^4:0
 598         &psllq          ($D1,32);
 599         &psllq          ($D2,32);
 600         &psllq          ($D3,32);
 601         &psllq          ($D4,32);
 602         &por            ($D0,&QWP(16*0,"esp"));         # r^3:r^1:r^4:r^2
 603         &por            ($D1,&QWP(16*1,"esp"));
 604         &por            ($D2,&QWP(16*2,"esp"));
 605         &por            ($D3,&QWP(16*3,"esp"));
 606         &por            ($D4,&QWP(16*4,"esp"));
 607
 608         &pshufd         ($D0,$D0,0b10001101);           # -> r^1:r^2:r^3:r^4
 609         &pshufd         ($D1,$D1,0b10001101);
 610         &pshufd         ($D2,$D2,0b10001101);
 611         &pshufd         ($D3,$D3,0b10001101);
 612         &pshufd         ($D4,$D4,0b10001101);
 613
 614         &movdqu         (&QWP(16*0,"edi"),$D0);         # save the table
 615         &movdqu         (&QWP(16*1,"edi"),$D1);
 616         &movdqu         (&QWP(16*2,"edi"),$D2);
 617         &movdqu         (&QWP(16*3,"edi"),$D3);
 618         &movdqu         (&QWP(16*4,"edi"),$D4);
 619
 620         &movdqa         ($T1,$D1);
 621         &movdqa         ($T0,$D2);
 622         &pslld          ($T1,2);
 623         &pslld          ($T0,2);
 624         &paddd          ($T1,$D1);                      # *5
 625         &paddd          ($T0,$D2);                      # *5
 626         &movdqu         (&QWP(16*5,"edi"),$T1);
 627         &movdqu         (&QWP(16*6,"edi"),$T0);
 628         &movdqa         ($T1,$D3);
 629         &movdqa         ($T0,$D4);
 630         &pslld          ($T1,2);
 631         &pslld          ($T0,2);
 632         &paddd          ($T1,$D3);                      # *5
 633         &paddd          ($T0,$D4);                      # *5
 634         &movdqu         (&QWP(16*7,"edi"),$T1);
 635         &movdqu         (&QWP(16*8,"edi"),$T0);
 636
 637         &mov            ("esp","ebp");
 638         &lea            ("edi",&DWP(-16*3,"edi"));      # size de-optimization
 639         &ret            ();
 640 &function_end_B("_poly1305_init_sse2");
 641
 642 &align  (32);
 643 &function_begin("_poly1305_blocks_sse2");
 644         &mov    ("edi",&wparam(0));                     # ctx
 645         &mov    ("esi",&wparam(1));                     # inp
 646         &mov    ("ecx",&wparam(2));                     # len
 647
 648         &mov    ("eax",&DWP(4*5,"edi"));                # is_base2_26
 649         &and    ("ecx",-16);
 650         &jz     (&label("nodata"));
 651         &cmp    ("ecx",64);
 652         &jae    (&label("enter_sse2"));
 653         &test   ("eax","eax");                          # is_base2_26?
 654         &jz     (&label("enter_blocks"));
 655
 656 &set_label("enter_sse2",16);
 657         &call   (&label("pic_point"));
 658 &set_label("pic_point");
 659         &blindpop("ebx");
 660         &lea    ("ebx",&DWP(&label("const_sse2")."-".&label("pic_point"),"ebx"));
 661
 662         &test   ("eax","eax");                          # is_base2_26?
 663         &jnz    (&label("base2_26"));
 664
 665         &call   ("_poly1305_init_sse2");
 666
 667         ################################################# base 2^32 -> base 2^26
 668         &mov    ("eax",&DWP(0,"edi"));
 669         &mov    ("ecx",&DWP(3,"edi"));
 670         &mov    ("edx",&DWP(6,"edi"));
 671         &mov    ("esi",&DWP(9,"edi"));
 672         &mov    ("ebp",&DWP(13,"edi"));
 673         &mov    (&DWP(4*5,"edi"),1);                    # is_base2_26
 674
 675         &shr    ("ecx",2);
 676         &and    ("eax",0x3ffffff);
 677         &shr    ("edx",4);
 678         &and    ("ecx",0x3ffffff);
 679         &shr    ("esi",6);
 680         &and    ("edx",0x3ffffff);
 681
 682         &movd   ($D0,"eax");
 683         &movd   ($D1,"ecx");
 684         &movd   ($D2,"edx");
 685         &movd   ($D3,"esi");
 686         &movd   ($D4,"ebp");
 687
 688         &mov    ("esi",&wparam(1));                     # [reload] inp
 689         &mov    ("ecx",&wparam(2));                     # [reload] len
 690         &jmp    (&label("base2_32"));
 691
 692 &set_label("base2_26",16);
 693         &movd   ($D0,&DWP(4*0,"edi"));                  # load hash value
 694         &movd   ($D1,&DWP(4*1,"edi"));
 695         &movd   ($D2,&DWP(4*2,"edi"));
 696         &movd   ($D3,&DWP(4*3,"edi"));
 697         &movd   ($D4,&DWP(4*4,"edi"));
 698         &movdqa ($MASK,&QWP(64,"ebx"));
 699
 700 &set_label("base2_32");
 701         &mov    ("eax",&wparam(3));                     # padbit
 702         &mov    ("ebp","esp");
 703
 704         &sub    ("esp",16*(5+5+5+9+9));
 705         &and    ("esp",-16);
 706
 707         &lea    ("edi",&DWP(16*3,"edi"));               # size optimization
 708         &shl    ("eax",24);                             # padbit
 709
 710         &test   ("ecx",31);
 711         &jz     (&label("even"));
 712
 713         ################################################################
 714         # process single block, with SSE2, because it's still faster
 715         # even though half of result is discarded
 716
 717         &movdqu         ($T1,&QWP(0,"esi"));            # input
 718         &lea            ("esi",&DWP(16,"esi"));
 719
 720         &movdqa         ($T0,$T1);                      # -> base 2^26 ...
 721         &pand           ($T1,$MASK);
 722         &paddd          ($D0,$T1);                      # ... and accumuate
 723
 724         &movdqa         ($T1,$T0);
 725         &psrlq          ($T0,26);
 726         &psrldq         ($T1,6);
 727         &pand           ($T0,$MASK);
 728         &paddd          ($D1,$T0);
 729
 730         &movdqa         ($T0,$T1);
 731         &psrlq          ($T1,4);
 732         &pand           ($T1,$MASK);
 733         &paddd          ($D2,$T1);
 734
 735         &movdqa         ($T1,$T0);
 736         &psrlq          ($T0,30);
 737         &pand           ($T0,$MASK);
 738         &psrldq         ($T1,7);
 739         &paddd          ($D3,$T0);
 740
 741         &movd           ($T0,"eax");                    # padbit
 742         &paddd          ($D4,$T1);
 743          &movd          ($T1,&DWP(16*0+12,"edi"));      # r0
 744         &paddd          ($D4,$T0);
 745
 746         &movdqa         (&QWP(16*0,"esp"),$D0);
 747         &movdqa         (&QWP(16*1,"esp"),$D1);
 748         &movdqa         (&QWP(16*2,"esp"),$D2);
 749         &movdqa         (&QWP(16*3,"esp"),$D3);
 750         &movdqa         (&QWP(16*4,"esp"),$D4);
 751
 752         ################################################################
 753         # d4 = h4*r0 + h3*r1   + h2*r2   + h1*r3   + h0*r4
 754         # d3 = h3*r0 + h2*r1   + h1*r2   + h0*r3   + h4*5*r4
 755         # d2 = h2*r0 + h1*r1   + h0*r2   + h4*5*r3 + h3*5*r4
 756         # d1 = h1*r0 + h0*r1   + h4*5*r2 + h3*5*r3 + h2*5*r4
 757         # d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
 758
 759         &pmuludq        ($D0,$T1);                      # h4*r0
 760         &pmuludq        ($D1,$T1);                      # h3*r0
 761         &pmuludq        ($D2,$T1);                      # h2*r0
 762          &movd          ($T0,&DWP(16*1+12,"edi"));      # r1
 763         &pmuludq        ($D3,$T1);                      # h1*r0
 764         &pmuludq        ($D4,$T1);                      # h0*r0
 765
 766         &pmuladd        (sub {  my ($reg,$i)=@_;
 767                                 &movd ($reg,&DWP(16*$i+12,"edi"));
 768                              });
 769
 770         &lazy_reduction ();
 771
 772         &sub            ("ecx",16);
 773         &jz             (&label("done"));
 774
 775 &set_label("even");
 776         &lea            ("edx",&DWP(16*(5+5+5+9),"esp"));# size optimization
 777         &lea            ("eax",&DWP(-16*2,"esi"));
 778         &sub            ("ecx",64);
 779
 780         ################################################################
 781         # expand and copy pre-calculated table to stack
 782
 783         &movdqu         ($T0,&QWP(16*0,"edi"));         # r^1:r^2:r^3:r^4
 784         &pshufd         ($T1,$T0,0b01000100);           # duplicate r^3:r^4
 785         &cmovb          ("esi","eax");
 786         &pshufd         ($T0,$T0,0b11101110);           # duplicate r^1:r^2
 787         &movdqa         (&QWP(16*0,"edx"),$T1);
 788         &lea            ("eax",&DWP(16*10,"esp"));
 789         &movdqu         ($T1,&QWP(16*1,"edi"));
 790         &movdqa         (&QWP(16*(0-9),"edx"),$T0);
 791         &pshufd         ($T0,$T1,0b01000100);
 792         &pshufd         ($T1,$T1,0b11101110);
 793         &movdqa         (&QWP(16*1,"edx"),$T0);
 794         &movdqu         ($T0,&QWP(16*2,"edi"));
 795         &movdqa         (&QWP(16*(1-9),"edx"),$T1);
 796         &pshufd         ($T1,$T0,0b01000100);
 797         &pshufd         ($T0,$T0,0b11101110);
 798         &movdqa         (&QWP(16*2,"edx"),$T1);
 799         &movdqu         ($T1,&QWP(16*3,"edi"));
 800         &movdqa         (&QWP(16*(2-9),"edx"),$T0);
 801         &pshufd         ($T0,$T1,0b01000100);
 802         &pshufd         ($T1,$T1,0b11101110);
 803         &movdqa         (&QWP(16*3,"edx"),$T0);
 804         &movdqu         ($T0,&QWP(16*4,"edi"));
 805         &movdqa         (&QWP(16*(3-9),"edx"),$T1);
 806         &pshufd         ($T1,$T0,0b01000100);
 807         &pshufd         ($T0,$T0,0b11101110);
 808         &movdqa         (&QWP(16*4,"edx"),$T1);
 809         &movdqu         ($T1,&QWP(16*5,"edi"));
 810         &movdqa         (&QWP(16*(4-9),"edx"),$T0);
 811         &pshufd         ($T0,$T1,0b01000100);
 812         &pshufd         ($T1,$T1,0b11101110);
 813         &movdqa         (&QWP(16*5,"edx"),$T0);
 814         &movdqu         ($T0,&QWP(16*6,"edi"));
 815         &movdqa         (&QWP(16*(5-9),"edx"),$T1);
 816         &pshufd         ($T1,$T0,0b01000100);
 817         &pshufd         ($T0,$T0,0b11101110);
 818         &movdqa         (&QWP(16*6,"edx"),$T1);
 819         &movdqu         ($T1,&QWP(16*7,"edi"));
 820         &movdqa         (&QWP(16*(6-9),"edx"),$T0);
 821         &pshufd         ($T0,$T1,0b01000100);
 822         &pshufd         ($T1,$T1,0b11101110);
 823         &movdqa         (&QWP(16*7,"edx"),$T0);
 824         &movdqu         ($T0,&QWP(16*8,"edi"));
 825         &movdqa         (&QWP(16*(7-9),"edx"),$T1);
 826         &pshufd         ($T1,$T0,0b01000100);
 827         &pshufd         ($T0,$T0,0b11101110);
 828         &movdqa         (&QWP(16*8,"edx"),$T1);
 829         &movdqa         (&QWP(16*(8-9),"edx"),$T0);
 830
 831 sub load_input {
 832 my ($inpbase,$offbase)=@_;
 833
 834         &movdqu         ($T0,&QWP($inpbase+0,"esi"));   # load input
 835         &movdqu         ($T1,&QWP($inpbase+16,"esi"));
 836         &lea            ("esi",&DWP(16*2,"esi"));
 837
 838         &movdqa         (&QWP($offbase+16*2,"esp"),$D2);
 839         &movdqa         (&QWP($offbase+16*3,"esp"),$D3);
 840         &movdqa         (&QWP($offbase+16*4,"esp"),$D4);
 841
 842         &movdqa         ($D2,$T0);                      # splat input
 843         &movdqa         ($D3,$T1);
 844         &psrldq         ($D2,6);
 845         &psrldq         ($D3,6);
 846         &movdqa         ($D4,$T0);
 847         &punpcklqdq     ($D2,$D3);                      # 2:3
 848         &punpckhqdq     ($D4,$T1);                      # 4
 849         &punpcklqdq     ($T0,$T1);                      # 0:1
 850
 851         &movdqa         ($D3,$D2);
 852         &psrlq          ($D2,4);
 853         &psrlq          ($D3,30);
 854         &movdqa         ($T1,$T0);
 855         &psrlq          ($D4,40);                       # 4
 856         &psrlq          ($T1,26);
 857         &pand           ($T0,$MASK);                    # 0
 858         &pand           ($T1,$MASK);                    # 1
 859         &pand           ($D2,$MASK);                    # 2
 860         &pand           ($D3,$MASK);                    # 3
 861         &por            ($D4,&QWP(0,"ebx"));            # padbit, yes, always
 862
 863         &movdqa         (&QWP($offbase+16*0,"esp"),$D0) if ($offbase);
 864         &movdqa         (&QWP($offbase+16*1,"esp"),$D1) if ($offbase);
 865 }
 866         &load_input     (16*2,16*5);
 867
 868         &jbe            (&label("skip_loop"));
 869         &jmp            (&label("loop"));
 870
 871 &set_label("loop",32);
 872         ################################################################
 873         # ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2
 874         # ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^3+inp[7]*r
 875         #   \___________________/
 876         # ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2+inp[8])*r^2
 877         # ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^4+inp[7]*r^2+inp[9])*r
 878         #   \___________________/ \____________________/
 879         ################################################################
 880
 881         &movdqa         ($T2,&QWP(16*(0-9),"edx"));     # r0^2
 882         &movdqa         (&QWP(16*1,"eax"),$T1);
 883         &movdqa         (&QWP(16*2,"eax"),$D2);
 884         &movdqa         (&QWP(16*3,"eax"),$D3);
 885         &movdqa         (&QWP(16*4,"eax"),$D4);
 886
 887         ################################################################
 888         # d4 = h4*r0 + h0*r4   + h1*r3   + h2*r2   + h3*r1
 889         # d3 = h3*r0 + h0*r3   + h1*r2   + h2*r1   + h4*5*r4
 890         # d2 = h2*r0 + h0*r2   + h1*r1   + h3*5*r4 + h4*5*r3
 891         # d1 = h1*r0 + h0*r1   + h2*5*r4 + h3*5*r3 + h4*5*r2
 892         # d0 = h0*r0 + h1*5*r4 + h2*5*r3 + h3*5*r2 + h4*5*r1
 893
 894         &movdqa         ($D1,$T0);
 895         &pmuludq        ($T0,$T2);                      # h0*r0
 896         &movdqa         ($D0,$T1);
 897         &pmuludq        ($T1,$T2);                      # h1*r0
 898         &pmuludq        ($D2,$T2);                      # h2*r0
 899         &pmuludq        ($D3,$T2);                      # h3*r0
 900         &pmuludq        ($D4,$T2);                      # h4*r0
 901
 902 sub pmuladd_alt {
 903 my $addr = shift;
 904
 905         &pmuludq        ($D0,&$addr(8));                # h1*s4
 906         &movdqa         ($T2,$D1);
 907         &pmuludq        ($D1,&$addr(1));                # h0*r1
 908         &paddq          ($D0,$T0);
 909         &movdqa         ($T0,$T2);
 910         &pmuludq        ($T2,&$addr(2));                # h0*r2
 911         &paddq          ($D1,$T1);
 912         &movdqa         ($T1,$T0);
 913         &pmuludq        ($T0,&$addr(3));                # h0*r3
 914         &paddq          ($D2,$T2);
 915          &movdqa        ($T2,&QWP(16*1,"eax"));         # pull h1
 916         &pmuludq        ($T1,&$addr(4));                # h0*r4
 917         &paddq          ($D3,$T0);
 918
 919         &movdqa         ($T0,$T2);
 920         &pmuludq        ($T2,&$addr(1));                # h1*r1
 921          &paddq         ($D4,$T1);
 922         &movdqa         ($T1,$T0);
 923         &pmuludq        ($T0,&$addr(2));                # h1*r2
 924         &paddq          ($D2,$T2);
 925         &movdqa         ($T2,&QWP(16*2,"eax"));         # pull h2
 926         &pmuludq        ($T1,&$addr(3));                # h1*r3
 927         &paddq          ($D3,$T0);
 928         &movdqa         ($T0,$T2);
 929         &pmuludq        ($T2,&$addr(7));                # h2*s3
 930         &paddq          ($D4,$T1);
 931         &movdqa         ($T1,$T0);
 932         &pmuludq        ($T0,&$addr(8));                # h2*s4
 933         &paddq          ($D0,$T2);
 934
 935         &movdqa         ($T2,$T1);
 936         &pmuludq        ($T1,&$addr(1));                # h2*r1
 937          &paddq         ($D1,$T0);
 938         &movdqa         ($T0,&QWP(16*3,"eax"));         # pull h3
 939         &pmuludq        ($T2,&$addr(2));                # h2*r2
 940         &paddq          ($D3,$T1);
 941         &movdqa         ($T1,$T0);
 942         &pmuludq        ($T0,&$addr(6));                # h3*s2
 943         &paddq          ($D4,$T2);
 944         &movdqa         ($T2,$T1);
 945         &pmuludq        ($T1,&$addr(7));                # h3*s3
 946         &paddq          ($D0,$T0);
 947         &movdqa         ($T0,$T2);
 948         &pmuludq        ($T2,&$addr(8));                # h3*s4
 949         &paddq          ($D1,$T1);
 950
 951         &movdqa         ($T1,&QWP(16*4,"eax"));         # pull h4
 952         &pmuludq        ($T0,&$addr(1));                # h3*r1
 953          &paddq         ($D2,$T2);
 954         &movdqa         ($T2,$T1);
 955         &pmuludq        ($T1,&$addr(8));                # h4*s4
 956         &paddq          ($D4,$T0);
 957         &movdqa         ($T0,$T2);
 958         &pmuludq        ($T2,&$addr(5));                # h4*s1
 959         &paddq          ($D3,$T1);
 960         &movdqa         ($T1,$T0);
 961         &pmuludq        ($T0,&$addr(6));                # h4*s2
 962         &paddq          ($D0,$T2);
 963          &movdqa        ($MASK,&QWP(64,"ebx"));
 964         &pmuludq        ($T1,&$addr(7));                # h4*s3
 965         &paddq          ($D1,$T0);
 966         &paddq          ($D2,$T1);
 967 }
 968         &pmuladd_alt    (sub {  my $i=shift; &QWP(16*($i-9),"edx");     });
 969
 970         &load_input     (-16*2,0);
 971         &lea            ("eax",&DWP(-16*2,"esi"));
 972         &sub            ("ecx",64);
 973
 974         &paddd          ($T0,&QWP(16*(5+0),"esp"));     # add hash value
 975         &paddd          ($T1,&QWP(16*(5+1),"esp"));
 976         &paddd          ($D2,&QWP(16*(5+2),"esp"));
 977         &paddd          ($D3,&QWP(16*(5+3),"esp"));
 978         &paddd          ($D4,&QWP(16*(5+4),"esp"));
 979
 980         &cmovb          ("esi","eax");
 981         &lea            ("eax",&DWP(16*10,"esp"));
 982
 983         &movdqa         ($T2,&QWP(16*0,"edx"));         # r0^4
 984         &movdqa         (&QWP(16*1,"esp"),$D1);
 985         &movdqa         (&QWP(16*1,"eax"),$T1);
 986         &movdqa         (&QWP(16*2,"eax"),$D2);
 987         &movdqa         (&QWP(16*3,"eax"),$D3);
 988         &movdqa         (&QWP(16*4,"eax"),$D4);
 989
 990         ################################################################
 991         # d4 += h4*r0 + h0*r4   + h1*r3   + h2*r2   + h3*r1
 992         # d3 += h3*r0 + h0*r3   + h1*r2   + h2*r1   + h4*5*r4
 993         # d2 += h2*r0 + h0*r2   + h1*r1   + h3*5*r4 + h4*5*r3
 994         # d1 += h1*r0 + h0*r1   + h2*5*r4 + h3*5*r3 + h4*5*r2
 995         # d0 += h0*r0 + h1*5*r4 + h2*5*r3 + h3*5*r2 + h4*5*r1
 996
 997         &movdqa         ($D1,$T0);
 998         &pmuludq        ($T0,$T2);                      # h0*r0
 999         &paddq          ($T0,$D0);
1000         &movdqa         ($D0,$T1);
1001         &pmuludq        ($T1,$T2);                      # h1*r0
1002         &pmuludq        ($D2,$T2);                      # h2*r0
1003         &pmuludq        ($D3,$T2);                      # h3*r0
1004         &pmuludq        ($D4,$T2);                      # h4*r0
1005
1006         &paddq          ($T1,&QWP(16*1,"esp"));
1007         &paddq          ($D2,&QWP(16*2,"esp"));
1008         &paddq          ($D3,&QWP(16*3,"esp"));
1009         &paddq          ($D4,&QWP(16*4,"esp"));
1010
1011         &pmuladd_alt    (sub {  my $i=shift; &QWP(16*$i,"edx"); });
1012
1013         &lazy_reduction ();
1014
1015         &load_input     (16*2,16*5);
1016
1017         &ja             (&label("loop"));
1018
1019 &set_label("skip_loop");
1020         ################################################################
1021         # multiply (inp[0:1]+hash) or inp[2:3] by r^2:r^1
1022
1023          &pshufd        ($T2,&QWP(16*(0-9),"edx"),0x10);# r0^n
1024         &add            ("ecx",32);
1025         &jnz            (&label("long_tail"));
1026
1027         &paddd          ($T0,$D0);                      # add hash value
1028         &paddd          ($T1,$D1);
1029         &paddd          ($D2,&QWP(16*7,"esp"));
1030         &paddd          ($D3,&QWP(16*8,"esp"));
1031         &paddd          ($D4,&QWP(16*9,"esp"));
1032
1033 &set_label("long_tail");
1034
1035         &movdqa         (&QWP(16*0,"eax"),$T0);
1036         &movdqa         (&QWP(16*1,"eax"),$T1);
1037         &movdqa         (&QWP(16*2,"eax"),$D2);
1038         &movdqa         (&QWP(16*3,"eax"),$D3);
1039         &movdqa         (&QWP(16*4,"eax"),$D4);
1040
1041         ################################################################
1042         # d4 = h4*r0 + h3*r1   + h2*r2   + h1*r3   + h0*r4
1043         # d3 = h3*r0 + h2*r1   + h1*r2   + h0*r3   + h4*5*r4
1044         # d2 = h2*r0 + h1*r1   + h0*r2   + h4*5*r3 + h3*5*r4
1045         # d1 = h1*r0 + h0*r1   + h4*5*r2 + h3*5*r3 + h2*5*r4
1046         # d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
1047
1048         &pmuludq        ($T0,$T2);                      # h0*r0
1049         &pmuludq        ($T1,$T2);                      # h1*r0
1050         &pmuludq        ($D2,$T2);                      # h2*r0
1051         &movdqa         ($D0,$T0);
1052          &pshufd        ($T0,&QWP(16*(1-9),"edx"),0x10);# r1^n
1053         &pmuludq        ($D3,$T2);                      # h3*r0
1054         &movdqa         ($D1,$T1);
1055         &pmuludq        ($D4,$T2);                      # h4*r0
1056
1057         &pmuladd        (sub {  my ($reg,$i)=@_;
1058                                 &pshufd ($reg,&QWP(16*($i-9),"edx"),0x10);
1059                              },"eax");
1060
1061         &jz             (&label("short_tail"));
1062
1063         &load_input     (-16*2,0);
1064
1065          &pshufd        ($T2,&QWP(16*0,"edx"),0x10);    # r0^n
1066         &paddd          ($T0,&QWP(16*5,"esp"));         # add hash value
1067         &paddd          ($T1,&QWP(16*6,"esp"));
1068         &paddd          ($D2,&QWP(16*7,"esp"));
1069         &paddd          ($D3,&QWP(16*8,"esp"));
1070         &paddd          ($D4,&QWP(16*9,"esp"));
1071
1072         ################################################################
1073         # multiply inp[0:1] by r^4:r^3 and accumulate
1074
1075         &movdqa         (&QWP(16*0,"esp"),$T0);
1076         &pmuludq        ($T0,$T2);                      # h0*r0
1077         &movdqa         (&QWP(16*1,"esp"),$T1);
1078         &pmuludq        ($T1,$T2);                      # h1*r0
1079         &paddq          ($D0,$T0);
1080         &movdqa         ($T0,$D2);
1081         &pmuludq        ($D2,$T2);                      # h2*r0
1082         &paddq          ($D1,$T1);
1083         &movdqa         ($T1,$D3);
1084         &pmuludq        ($D3,$T2);                      # h3*r0
1085         &paddq          ($D2,&QWP(16*2,"esp"));
1086         &movdqa         (&QWP(16*2,"esp"),$T0);
1087          &pshufd        ($T0,&QWP(16*1,"edx"),0x10);    # r1^n
1088         &paddq          ($D3,&QWP(16*3,"esp"));
1089         &movdqa         (&QWP(16*3,"esp"),$T1);
1090         &movdqa         ($T1,$D4);
1091         &pmuludq        ($D4,$T2);                      # h4*r0
1092         &paddq          ($D4,&QWP(16*4,"esp"));
1093         &movdqa         (&QWP(16*4,"esp"),$T1);
1094
1095         &pmuladd        (sub {  my ($reg,$i)=@_;
1096                                 &pshufd ($reg,&QWP(16*$i,"edx"),0x10);
1097                              });
1098
1099 &set_label("short_tail");
1100
1101         ################################################################
1102         # horizontal addition
1103
1104         &pshufd         ($T1,$D4,0b01001110);
1105         &pshufd         ($T0,$D3,0b01001110);
1106         &paddq          ($D4,$T1);
1107         &paddq          ($D3,$T0);
1108         &pshufd         ($T1,$D0,0b01001110);
1109         &pshufd         ($T0,$D1,0b01001110);
1110         &paddq          ($D0,$T1);
1111         &paddq          ($D1,$T0);
1112         &pshufd         ($T1,$D2,0b01001110);
1113         #&paddq         ($D2,$T1);
1114
1115         &lazy_reduction (sub { &paddq ($D2,$T1) });
1116
1117 &set_label("done");
1118         &movd           (&DWP(-16*3+4*0,"edi"),$D0);    # store hash value
1119         &movd           (&DWP(-16*3+4*1,"edi"),$D1);
1120         &movd           (&DWP(-16*3+4*2,"edi"),$D2);
1121         &movd           (&DWP(-16*3+4*3,"edi"),$D3);
1122         &movd           (&DWP(-16*3+4*4,"edi"),$D4);
1123         &mov    ("esp","ebp");
1124 &set_label("nodata");
1125 &function_end("_poly1305_blocks_sse2");
1126
1127 &align  (32);
1128 &function_begin("_poly1305_emit_sse2");
1129         &mov    ("ebp",&wparam(0));             # context
1130
1131         &cmp    (&DWP(4*5,"ebp"),0);            # is_base2_26?
1132         &je     (&label("enter_emit"));
1133
1134         &mov    ("eax",&DWP(4*0,"ebp"));        # load hash value
1135         &mov    ("edi",&DWP(4*1,"ebp"));
1136         &mov    ("ecx",&DWP(4*2,"ebp"));
1137         &mov    ("edx",&DWP(4*3,"ebp"));
1138         &mov    ("esi",&DWP(4*4,"ebp"));
1139
1140         &mov    ("ebx","edi");                  # base 2^26 -> base 2^32
1141         &shl    ("edi",26);
1142         &shr    ("ebx",6);
1143         &add    ("eax","edi");
1144         &mov    ("edi","ecx");
1145         &adc    ("ebx",0);
1146
1147         &shl    ("edi",20);
1148         &shr    ("ecx",12);
1149         &add    ("ebx","edi");
1150         &mov    ("edi","edx");
1151         &adc    ("ecx",0);
1152
1153         &shl    ("edi",14);
1154         &shr    ("edx",18);
1155         &add    ("ecx","edi");
1156         &mov    ("edi","esi");
1157         &adc    ("edx",0);
1158
1159         &shl    ("edi",8);
1160         &shr    ("esi",24);
1161         &add    ("edx","edi");
1162         &adc    ("esi",0);                      # can be partially reduced
1163
1164         &mov    ("edi","esi");                  # final reduction
1165         &and    ("esi",3);
1166         &shr    ("edi",2);
1167         &lea    ("ebp",&DWP(0,"edi","edi",4));  # *5
1168          &mov   ("edi",&wparam(1));             # output
1169         add     ("eax","ebp");
1170          &mov   ("ebp",&wparam(2));             # key
1171         adc     ("ebx",0);
1172         adc     ("ecx",0);
1173         adc     ("edx",0);
1174
1175         &movd   ($D0,"eax");                    # offload original hash value
1176         &add    ("eax",5);                      # compare to modulus
1177         &movd   ($D1,"ebx");
1178         &adc    ("ebx",0);
1179         &movd   ($D2,"ecx");
1180         &adc    ("ecx",0);
1181         &movd   ($D3,"edx");
1182         &adc    ("edx",0);
1183         &adc    ("esi",0);
1184         &shr    ("esi",2);                      # did it carry/borrow?
1185
1186         &neg    ("esi");                        # do we choose (hash-modulus) ...
1187         &and    ("eax","esi");
1188         &and    ("ebx","esi");
1189         &and    ("ecx","esi");
1190         &and    ("edx","esi");
1191         &mov    (&DWP(4*0,"edi"),"eax");
1192         &movd   ("eax",$D0);
1193         &mov    (&DWP(4*1,"edi"),"ebx");
1194         &movd   ("ebx",$D1);
1195         &mov    (&DWP(4*2,"edi"),"ecx");
1196         &movd   ("ecx",$D2);
1197         &mov    (&DWP(4*3,"edi"),"edx");
1198         &movd   ("edx",$D3);
1199
1200         &not    ("esi");                        # ... or original hash value?
1201         &and    ("eax","esi");
1202         &and    ("ebx","esi");
1203         &or     ("eax",&DWP(4*0,"edi"));
1204         &and    ("ecx","esi");
1205         &or     ("ebx",&DWP(4*1,"edi"));
1206         &and    ("edx","esi");
1207         &or     ("ecx",&DWP(4*2,"edi"));
1208         &or     ("edx",&DWP(4*3,"edi"));
1209
1210         &add    ("eax",&DWP(4*0,"ebp"));        # accumulate key
1211         &adc    ("ebx",&DWP(4*1,"ebp"));
1212         &mov    (&DWP(4*0,"edi"),"eax");
1213         &adc    ("ecx",&DWP(4*2,"ebp"));
1214         &mov    (&DWP(4*1,"edi"),"ebx");
1215         &adc    ("edx",&DWP(4*3,"ebp"));
1216         &mov    (&DWP(4*2,"edi"),"ecx");
1217         &mov    (&DWP(4*3,"edi"),"edx");
1218 &function_end("_poly1305_emit_sse2");
1219
1220 if ($avx>1) {
1221 ########################################################################
1222 # Note that poly1305_init_avx2 operates on %xmm, I could have used
1223 # poly1305_init_sse2...
1224
1225 &align  (32);
1226 &function_begin_B("_poly1305_init_avx2");
1227         &vmovdqu        ($D4,&QWP(4*6,"edi"));          # key base 2^32
1228         &lea            ("edi",&DWP(16*3,"edi"));       # size optimization
1229         &mov            ("ebp","esp");
1230         &sub            ("esp",16*(9+5));
1231         &and            ("esp",-16);
1232
1233         #&vpand         ($D4,$D4,&QWP(96,"ebx"));       # magic mask
1234         &vmovdqa        ($MASK,&QWP(64,"ebx"));
1235
1236         &vpand          ($D0,$D4,$MASK);                # -> base 2^26
1237         &vpsrlq         ($D1,$D4,26);
1238         &vpsrldq        ($D3,$D4,6);
1239         &vpand          ($D1,$D1,$MASK);
1240         &vpsrlq         ($D2,$D3,4)
1241         &vpsrlq         ($D3,$D3,30);
1242         &vpand          ($D2,$D2,$MASK);
1243         &vpand          ($D3,$D3,$MASK);
1244         &vpsrldq        ($D4,$D4,13);
1245
1246         &lea            ("edx",&DWP(16*9,"esp"));       # size optimization
1247         &mov            ("ecx",2);
1248 &set_label("square");
1249         &vmovdqa        (&QWP(16*0,"esp"),$D0);
1250         &vmovdqa        (&QWP(16*1,"esp"),$D1);
1251         &vmovdqa        (&QWP(16*2,"esp"),$D2);
1252         &vmovdqa        (&QWP(16*3,"esp"),$D3);
1253         &vmovdqa        (&QWP(16*4,"esp"),$D4);
1254
1255         &vpslld         ($T1,$D1,2);
1256         &vpslld         ($T0,$D2,2);
1257         &vpaddd         ($T1,$T1,$D1);                  # *5
1258         &vpaddd         ($T0,$T0,$D2);                  # *5
1259         &vmovdqa        (&QWP(16*5,"esp"),$T1);
1260         &vmovdqa        (&QWP(16*6,"esp"),$T0);
1261         &vpslld         ($T1,$D3,2);
1262         &vpslld         ($T0,$D4,2);
1263         &vpaddd         ($T1,$T1,$D3);                  # *5
1264         &vpaddd         ($T0,$T0,$D4);                  # *5
1265         &vmovdqa        (&QWP(16*7,"esp"),$T1);
1266         &vmovdqa        (&QWP(16*8,"esp"),$T0);
1267
1268         &vpshufd        ($T0,$D0,0b01000100);
1269         &vmovdqa        ($T1,$D1);
1270         &vpshufd        ($D1,$D1,0b01000100);
1271         &vpshufd        ($D2,$D2,0b01000100);
1272         &vpshufd        ($D3,$D3,0b01000100);
1273         &vpshufd        ($D4,$D4,0b01000100);
1274         &vmovdqa        (&QWP(16*0,"edx"),$T0);
1275         &vmovdqa        (&QWP(16*1,"edx"),$D1);
1276         &vmovdqa        (&QWP(16*2,"edx"),$D2);
1277         &vmovdqa        (&QWP(16*3,"edx"),$D3);
1278         &vmovdqa        (&QWP(16*4,"edx"),$D4);
1279
1280         ################################################################
1281         # d4 = h4*r0 + h3*r1   + h2*r2   + h1*r3   + h0*r4
1282         # d3 = h3*r0 + h2*r1   + h1*r2   + h0*r3   + h4*5*r4
1283         # d2 = h2*r0 + h1*r1   + h0*r2   + h4*5*r3 + h3*5*r4
1284         # d1 = h1*r0 + h0*r1   + h4*5*r2 + h3*5*r3 + h2*5*r4
1285         # d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
1286
1287         &vpmuludq       ($D4,$D4,$D0);                  # h4*r0
1288         &vpmuludq       ($D3,$D3,$D0);                  # h3*r0
1289         &vpmuludq       ($D2,$D2,$D0);                  # h2*r0
1290         &vpmuludq       ($D1,$D1,$D0);                  # h1*r0
1291         &vpmuludq       ($D0,$T0,$D0);                  # h0*r0
1292
1293         &vpmuludq       ($T0,$T1,&QWP(16*3,"edx"));     # r1*h3
1294         &vpaddq         ($D4,$D4,$T0);
1295         &vpmuludq       ($T2,$T1,&QWP(16*2,"edx"));     # r1*h2
1296         &vpaddq         ($D3,$D3,$T2);
1297         &vpmuludq       ($T0,$T1,&QWP(16*1,"edx"));     # r1*h1
1298         &vpaddq         ($D2,$D2,$T0);
1299         &vmovdqa        ($T2,&QWP(16*5,"esp"));         # s1
1300         &vpmuludq       ($T1,$T1,&QWP(16*0,"edx"));     # r1*h0
1301         &vpaddq         ($D1,$D1,$T1);
1302          &vmovdqa       ($T0,&QWP(16*2,"esp"));         # r2
1303         &vpmuludq       ($T2,$T2,&QWP(16*4,"edx"));     # s1*h4
1304         &vpaddq         ($D0,$D0,$T2);
1305
1306         &vpmuludq       ($T1,$T0,&QWP(16*2,"edx"));     # r2*h2
1307         &vpaddq         ($D4,$D4,$T1);
1308         &vpmuludq       ($T2,$T0,&QWP(16*1,"edx"));     # r2*h1
1309         &vpaddq         ($D3,$D3,$T2);
1310         &vmovdqa        ($T1,&QWP(16*6,"esp"));         # s2
1311         &vpmuludq       ($T0,$T0,&QWP(16*0,"edx"));     # r2*h0
1312         &vpaddq         ($D2,$D2,$T0);
1313         &vpmuludq       ($T2,$T1,&QWP(16*4,"edx"));     # s2*h4
1314         &vpaddq         ($D1,$D1,$T2);
1315          &vmovdqa       ($T0,&QWP(16*3,"esp"));         # r3
1316         &vpmuludq       ($T1,$T1,&QWP(16*3,"edx"));     # s2*h3
1317         &vpaddq         ($D0,$D0,$T1);
1318
1319         &vpmuludq       ($T2,$T0,&QWP(16*1,"edx"));     # r3*h1
1320         &vpaddq         ($D4,$D4,$T2);
1321         &vmovdqa        ($T1,&QWP(16*7,"esp"));         # s3
1322         &vpmuludq       ($T0,$T0,&QWP(16*0,"edx"));     # r3*h0
1323         &vpaddq         ($D3,$D3,$T0);
1324         &vpmuludq       ($T2,$T1,&QWP(16*4,"edx"));     # s3*h4
1325         &vpaddq         ($D2,$D2,$T2);
1326         &vpmuludq       ($T0,$T1,&QWP(16*3,"edx"));     # s3*h3
1327         &vpaddq         ($D1,$D1,$T0);
1328          &vmovdqa       ($T2,&QWP(16*4,"esp"));         # r4
1329         &vpmuludq       ($T1,$T1,&QWP(16*2,"edx"));     # s3*h2
1330         &vpaddq         ($D0,$D0,$T1);
1331
1332         &vmovdqa        ($T0,&QWP(16*8,"esp"));         # s4
1333         &vpmuludq       ($T2,$T2,&QWP(16*0,"edx"));     # r4*h0
1334         &vpaddq         ($D4,$D4,$T2);
1335         &vpmuludq       ($T1,$T0,&QWP(16*4,"edx"));     # s4*h4
1336         &vpaddq         ($D3,$D3,$T1);
1337         &vpmuludq       ($T2,$T0,&QWP(16*1,"edx"));     # s4*h1
1338         &vpaddq         ($D0,$D0,$T2);
1339         &vpmuludq       ($T1,$T0,&QWP(16*2,"edx"));     # s4*h2
1340         &vpaddq         ($D1,$D1,$T1);
1341          &vmovdqa       ($MASK,&QWP(64,"ebx"));
1342         &vpmuludq       ($T0,$T0,&QWP(16*3,"edx"));     # s4*h3
1343         &vpaddq         ($D2,$D2,$T0);
1344
1345         ################################################################
1346         # lazy reduction
1347          &vpsrlq        ($T0,$D3,26);
1348          &vpand         ($D3,$D3,$MASK);
1349         &vpsrlq         ($T1,$D0,26);
1350         &vpand          ($D0,$D0,$MASK);
1351          &vpaddq        ($D4,$D4,$T0);                  # h3 -> h4
1352         &vpaddq         ($D1,$D1,$T1);                  # h0 -> h1
1353          &vpsrlq        ($T0,$D4,26);
1354          &vpand         ($D4,$D4,$MASK);
1355         &vpsrlq         ($T1,$D1,26);
1356         &vpand          ($D1,$D1,$MASK);
1357         &vpaddq         ($D2,$D2,$T1);                  # h1 -> h2
1358          &vpaddd        ($D0,$D0,$T0);
1359          &vpsllq        ($T0,$T0,2);
1360         &vpsrlq         ($T1,$D2,26);
1361         &vpand          ($D2,$D2,$MASK);
1362          &vpaddd        ($D0,$D0,$T0);                  # h4 -> h0
1363         &vpaddd         ($D3,$D3,$T1);                  # h2 -> h3
1364         &vpsrlq         ($T1,$D3,26);
1365          &vpsrlq        ($T0,$D0,26);
1366          &vpand         ($D0,$D0,$MASK);
1367         &vpand          ($D3,$D3,$MASK);
1368          &vpaddd        ($D1,$D1,$T0);                  # h0 -> h1
1369         &vpaddd         ($D4,$D4,$T1);                  # h3 -> h4
1370
1371         &dec            ("ecx");
1372         &jz             (&label("square_break"));
1373
1374         &vpunpcklqdq    ($D0,$D0,&QWP(16*0,"esp"));     # 0:r^1:0:r^2
1375         &vpunpcklqdq    ($D1,$D1,&QWP(16*1,"esp"));
1376         &vpunpcklqdq    ($D2,$D2,&QWP(16*2,"esp"));
1377         &vpunpcklqdq    ($D3,$D3,&QWP(16*3,"esp"));
1378         &vpunpcklqdq    ($D4,$D4,&QWP(16*4,"esp"));
1379         &jmp            (&label("square"));
1380
1381 &set_label("square_break");
1382         &vpsllq         ($D0,$D0,32);                   # -> r^3:0:r^4:0
1383         &vpsllq         ($D1,$D1,32);
1384         &vpsllq         ($D2,$D2,32);
1385         &vpsllq         ($D3,$D3,32);
1386         &vpsllq         ($D4,$D4,32);
1387         &vpor           ($D0,$D0,&QWP(16*0,"esp"));     # r^3:r^1:r^4:r^2
1388         &vpor           ($D1,$D1,&QWP(16*1,"esp"));
1389         &vpor           ($D2,$D2,&QWP(16*2,"esp"));
1390         &vpor           ($D3,$D3,&QWP(16*3,"esp"));
1391         &vpor           ($D4,$D4,&QWP(16*4,"esp"));
1392
1393         &vpshufd        ($D0,$D0,0b10001101);           # -> r^1:r^2:r^3:r^4
1394         &vpshufd        ($D1,$D1,0b10001101);
1395         &vpshufd        ($D2,$D2,0b10001101);
1396         &vpshufd        ($D3,$D3,0b10001101);
1397         &vpshufd        ($D4,$D4,0b10001101);
1398
1399         &vmovdqu        (&QWP(16*0,"edi"),$D0);         # save the table
1400         &vmovdqu        (&QWP(16*1,"edi"),$D1);
1401         &vmovdqu        (&QWP(16*2,"edi"),$D2);
1402         &vmovdqu        (&QWP(16*3,"edi"),$D3);
1403         &vmovdqu        (&QWP(16*4,"edi"),$D4);
1404
1405         &vpslld         ($T1,$D1,2);
1406         &vpslld         ($T0,$D2,2);
1407         &vpaddd         ($T1,$T1,$D1);                  # *5
1408         &vpaddd         ($T0,$T0,$D2);                  # *5
1409         &vmovdqu        (&QWP(16*5,"edi"),$T1);
1410         &vmovdqu        (&QWP(16*6,"edi"),$T0);
1411         &vpslld         ($T1,$D3,2);
1412         &vpslld         ($T0,$D4,2);
1413         &vpaddd         ($T1,$T1,$D3);                  # *5
1414         &vpaddd         ($T0,$T0,$D4);                  # *5
1415         &vmovdqu        (&QWP(16*7,"edi"),$T1);
1416         &vmovdqu        (&QWP(16*8,"edi"),$T0);
1417
1418         &mov            ("esp","ebp");
1419         &lea            ("edi",&DWP(-16*3,"edi"));      # size de-optimization
1420         &ret            ();
1421 &function_end_B("_poly1305_init_avx2");
1422
1423 ########################################################################
1424 # now it's time to switch to %ymm
1425
1426 my ($D0,$D1,$D2,$D3,$D4,$T0,$T1,$T2)=map("ymm$_",(0..7));
1427 my $MASK=$T2;
1428
1429 sub X { my $reg=shift; $reg=~s/^ymm/xmm/; $reg; }
1430
1431 &align  (32);
1432 &function_begin("_poly1305_blocks_avx2");
1433         &mov    ("edi",&wparam(0));                     # ctx
1434         &mov    ("esi",&wparam(1));                     # inp
1435         &mov    ("ecx",&wparam(2));                     # len
1436
1437         &mov    ("eax",&DWP(4*5,"edi"));                # is_base2_26
1438         &and    ("ecx",-16);
1439         &jz     (&label("nodata"));
1440         &cmp    ("ecx",64);
1441         &jae    (&label("enter_avx2"));
1442         &test   ("eax","eax");                          # is_base2_26?
1443         &jz     (&label("enter_blocks"));
1444
1445 &set_label("enter_avx2");
1446         &vzeroupper     ();
1447
1448         &call   (&label("pic_point"));
1449 &set_label("pic_point");
1450         &blindpop("ebx");
1451         &lea    ("ebx",&DWP(&label("const_sse2")."-".&label("pic_point"),"ebx"));
1452
1453         &test   ("eax","eax");                          # is_base2_26?
1454         &jnz    (&label("base2_26"));
1455
1456         &call   ("_poly1305_init_avx2");
1457
1458         ################################################# base 2^32 -> base 2^26
1459         &mov    ("eax",&DWP(0,"edi"));
1460         &mov    ("ecx",&DWP(3,"edi"));
1461         &mov    ("edx",&DWP(6,"edi"));
1462         &mov    ("esi",&DWP(9,"edi"));
1463         &mov    ("ebp",&DWP(13,"edi"));
1464
1465         &shr    ("ecx",2);
1466         &and    ("eax",0x3ffffff);
1467         &shr    ("edx",4);
1468         &and    ("ecx",0x3ffffff);
1469         &shr    ("esi",6);
1470         &and    ("edx",0x3ffffff);
1471
1472         &mov    (&DWP(4*0,"edi"),"eax");
1473         &mov    (&DWP(4*1,"edi"),"ecx");
1474         &mov    (&DWP(4*2,"edi"),"edx");
1475         &mov    (&DWP(4*3,"edi"),"esi");
1476         &mov    (&DWP(4*4,"edi"),"ebp");
1477         &mov    (&DWP(4*5,"edi"),1);                    # is_base2_26
1478
1479         &mov    ("esi",&wparam(1));                     # [reload] inp
1480         &mov    ("ecx",&wparam(2));                     # [reload] len
1481
1482 &set_label("base2_26");
1483         &mov    ("eax",&wparam(3));                     # padbit
1484         &mov    ("ebp","esp");
1485
1486         &sub    ("esp",32*(5+9));
1487         &and    ("esp",-512);                           # ensure that frame
1488                                                         # doesn't cross page
1489                                                         # boundary, which is
1490                                                         # essential for
1491                                                         # misaligned 32-byte
1492                                                         # loads
1493
1494         ################################################################
1495         # expand and copy pre-calculated table to stack
1496
1497         &vmovdqu        (&X($D0),&QWP(16*(3+0),"edi"));
1498         &lea            ("edx",&DWP(32*5+128,"esp"));   # +128 size optimization
1499         &vmovdqu        (&X($D1),&QWP(16*(3+1),"edi"));
1500         &vmovdqu        (&X($D2),&QWP(16*(3+2),"edi"));
1501         &vmovdqu        (&X($D3),&QWP(16*(3+3),"edi"));
1502         &vmovdqu        (&X($D4),&QWP(16*(3+4),"edi"));
1503         &lea            ("edi",&DWP(16*3,"edi"));       # size optimization
1504         &vpermq         ($D0,$D0,0b01000000);           # 00001234 -> 12343434
1505         &vpermq         ($D1,$D1,0b01000000);
1506         &vpermq         ($D2,$D2,0b01000000);
1507         &vpermq         ($D3,$D3,0b01000000);
1508         &vpermq         ($D4,$D4,0b01000000);
1509         &vpshufd        ($D0,$D0,0b11001000);           # 12343434 -> 14243444
1510         &vpshufd        ($D1,$D1,0b11001000);
1511         &vpshufd        ($D2,$D2,0b11001000);
1512         &vpshufd        ($D3,$D3,0b11001000);
1513         &vpshufd        ($D4,$D4,0b11001000);
1514         &vmovdqa        (&QWP(32*0-128,"edx"),$D0);
1515         &vmovdqu        (&X($D0),&QWP(16*5,"edi"));
1516         &vmovdqa        (&QWP(32*1-128,"edx"),$D1);
1517         &vmovdqu        (&X($D1),&QWP(16*6,"edi"));
1518         &vmovdqa        (&QWP(32*2-128,"edx"),$D2);
1519         &vmovdqu        (&X($D2),&QWP(16*7,"edi"));
1520         &vmovdqa        (&QWP(32*3-128,"edx"),$D3);
1521         &vmovdqu        (&X($D3),&QWP(16*8,"edi"));
1522         &vmovdqa        (&QWP(32*4-128,"edx"),$D4);
1523         &vpermq         ($D0,$D0,0b01000000);
1524         &vpermq         ($D1,$D1,0b01000000);
1525         &vpermq         ($D2,$D2,0b01000000);
1526         &vpermq         ($D3,$D3,0b01000000);
1527         &vpshufd        ($D0,$D0,0b11001000);
1528         &vpshufd        ($D1,$D1,0b11001000);
1529         &vpshufd        ($D2,$D2,0b11001000);
1530         &vpshufd        ($D3,$D3,0b11001000);
1531         &vmovdqa        (&QWP(32*5-128,"edx"),$D0);
1532         &vmovd          (&X($D0),&DWP(-16*3+4*0,"edi"));# load hash value
1533         &vmovdqa        (&QWP(32*6-128,"edx"),$D1);
1534         &vmovd          (&X($D1),&DWP(-16*3+4*1,"edi"));
1535         &vmovdqa        (&QWP(32*7-128,"edx"),$D2);
1536         &vmovd          (&X($D2),&DWP(-16*3+4*2,"edi"));
1537         &vmovdqa        (&QWP(32*8-128,"edx"),$D3);
1538         &vmovd          (&X($D3),&DWP(-16*3+4*3,"edi"));
1539         &vmovd          (&X($D4),&DWP(-16*3+4*4,"edi"));
1540         &vmovdqa        ($MASK,&QWP(64,"ebx"));
1541         &neg            ("eax");                        # padbit
1542
1543         &test           ("ecx",63);
1544         &jz             (&label("even"));
1545
1546         &mov            ("edx","ecx");
1547         &and            ("ecx",-64);
1548         &and            ("edx",63);
1549
1550         &vmovdqu        (&X($T0),&QWP(16*0,"esi"));
1551         &cmp            ("edx",32);
1552         &jb             (&label("one"));
1553
1554         &vmovdqu        (&X($T1),&QWP(16*1,"esi"));
1555         &je             (&label("two"));
1556
1557         &vinserti128    ($T0,$T0,&QWP(16*2,"esi"),1);
1558         &lea            ("esi",&DWP(16*3,"esi"));
1559         &lea            ("ebx",&DWP(8,"ebx"));          # three padbits
1560         &lea            ("edx",&DWP(32*5+128+8,"esp")); # --:r^1:r^2:r^3 (*)
1561         &jmp            (&label("tail"));
1562
1563 &set_label("two");
1564         &lea            ("esi",&DWP(16*2,"esi"));
1565         &lea            ("ebx",&DWP(16,"ebx"));         # two padbits
1566         &lea            ("edx",&DWP(32*5+128+16,"esp"));# --:--:r^1:r^2 (*)
1567         &jmp            (&label("tail"));
1568
1569 &set_label("one");
1570         &lea            ("esi",&DWP(16*1,"esi"));
1571         &vpxor          ($T1,$T1,$T1);
1572         &lea            ("ebx",&DWP(32,"ebx","eax",8)); # one or no padbits
1573         &lea            ("edx",&DWP(32*5+128+24,"esp"));# --:--:--:r^1 (*)
1574         &jmp            (&label("tail"));
1575
1576 # (*)   spots marked with '--' are data from next table entry, but they
1577 #       are multiplied by 0 and therefore rendered insignificant
1578
1579 &set_label("even",32);
1580         &vmovdqu        (&X($T0),&QWP(16*0,"esi"));     # load input
1581         &vmovdqu        (&X($T1),&QWP(16*1,"esi"));
1582         &vinserti128    ($T0,$T0,&QWP(16*2,"esi"),1);
1583         &vinserti128    ($T1,$T1,&QWP(16*3,"esi"),1);
1584         &lea            ("esi",&DWP(16*4,"esi"));
1585         &sub            ("ecx",64);
1586         &jz             (&label("tail"));
1587
1588 &set_label("loop");
1589         ################################################################
1590         # ((inp[0]*r^4+r[4])*r^4+r[8])*r^4
1591         # ((inp[1]*r^4+r[5])*r^4+r[9])*r^3
1592         # ((inp[2]*r^4+r[6])*r^4+r[10])*r^2
1593         # ((inp[3]*r^4+r[7])*r^4+r[11])*r^1
1594         #   \________/ \_______/
1595         ################################################################
1596
1597 sub vsplat_input {
1598         &vmovdqa        (&QWP(32*2,"esp"),$D2);
1599         &vpsrldq        ($D2,$T0,6);                    # splat input
1600         &vmovdqa        (&QWP(32*0,"esp"),$D0);
1601         &vpsrldq        ($D0,$T1,6);
1602         &vmovdqa        (&QWP(32*1,"esp"),$D1);
1603         &vpunpckhqdq    ($D1,$T0,$T1);                  # 4
1604         &vpunpcklqdq    ($T0,$T0,$T1);                  # 0:1
1605         &vpunpcklqdq    ($D2,$D2,$D0);                  # 2:3
1606
1607         &vpsrlq         ($D0,$D2,30);
1608         &vpsrlq         ($D2,$D2,4);
1609         &vpsrlq         ($T1,$T0,26);
1610         &vpsrlq         ($D1,$D1,40);                   # 4
1611         &vpand          ($D2,$D2,$MASK);                # 2
1612         &vpand          ($T0,$T0,$MASK);                # 0
1613         &vpand          ($T1,$T1,$MASK);                # 1
1614         &vpand          ($D0,$D0,$MASK);                # 3 (*)
1615         &vpor           ($D1,$D1,&QWP(0,"ebx"));        # padbit, yes, always
1616
1617         # (*)   note that output is counterintuitive, inp[3:4] is
1618         #       returned in $D1-2, while $D3-4 are preserved;
1619 }
1620         &vsplat_input   ();
1621
1622 sub vpmuladd {
1623 my $addr = shift;
1624
1625         &vpaddq         ($D2,$D2,&QWP(32*2,"esp"));     # add hash value
1626         &vpaddq         ($T0,$T0,&QWP(32*0,"esp"));
1627         &vpaddq         ($T1,$T1,&QWP(32*1,"esp"));
1628         &vpaddq         ($D0,$D0,$D3);
1629         &vpaddq         ($D1,$D1,$D4);
1630
1631         ################################################################
1632         # d3 = h2*r1   + h0*r3 + h1*r2   + h3*r0   + h4*5*r4
1633         # d4 = h2*r2   + h0*r4 + h1*r3   + h3*r1   + h4*r0
1634         # d0 = h2*5*r3 + h0*r0 + h1*5*r4 + h3*5*r2 + h4*5*r1
1635         # d1 = h2*5*r4 + h0*r1 + h1*r0   + h3*5*r3 + h4*5*r2
1636         # d2 = h2*r0   + h0*r2 + h1*r1   + h3*5*r4 + h4*5*r3
1637
1638         &vpmuludq       ($D3,$D2,&$addr(1));            # d3 = h2*r1
1639          &vmovdqa       (QWP(32*1,"esp"),$T1);
1640         &vpmuludq       ($D4,$D2,&$addr(2));            # d4 = h2*r2
1641          &vmovdqa       (QWP(32*3,"esp"),$D0);
1642         &vpmuludq       ($D0,$D2,&$addr(7));            # d0 = h2*s3
1643          &vmovdqa       (QWP(32*4,"esp"),$D1);
1644         &vpmuludq       ($D1,$D2,&$addr(8));            # d1 = h2*s4
1645         &vpmuludq       ($D2,$D2,&$addr(0));            # d2 = h2*r0
1646
1647         &vpmuludq       ($T2,$T0,&$addr(3));            # h0*r3
1648         &vpaddq         ($D3,$D3,$T2);                  # d3 += h0*r3
1649         &vpmuludq       ($T1,$T0,&$addr(4));            # h0*r4
1650         &vpaddq         ($D4,$D4,$T1);                  # d4 + h0*r4
1651         &vpmuludq       ($T2,$T0,&$addr(0));            # h0*r0
1652         &vpaddq         ($D0,$D0,$T2);                  # d0 + h0*r0
1653          &vmovdqa       ($T2,&QWP(32*1,"esp"));         # h1
1654         &vpmuludq       ($T1,$T0,&$addr(1));            # h0*r1
1655         &vpaddq         ($D1,$D1,$T1);                  # d1 += h0*r1
1656         &vpmuludq       ($T0,$T0,&$addr(2));            # h0*r2
1657         &vpaddq         ($D2,$D2,$T0);                  # d2 += h0*r2
1658
1659         &vpmuludq       ($T1,$T2,&$addr(2));            # h1*r2
1660         &vpaddq         ($D3,$D3,$T1);                  # d3 += h1*r2
1661         &vpmuludq       ($T0,$T2,&$addr(3));            # h1*r3
1662         &vpaddq         ($D4,$D4,$T0);                  # d4 += h1*r3
1663         &vpmuludq       ($T1,$T2,&$addr(8));            # h1*s4
1664         &vpaddq         ($D0,$D0,$T1);                  # d0 += h1*s4
1665          &vmovdqa       ($T1,&QWP(32*3,"esp"));         # h3
1666         &vpmuludq       ($T0,$T2,&$addr(0));            # h1*r0
1667         &vpaddq         ($D1,$D1,$T0);                  # d1 += h1*r0
1668         &vpmuludq       ($T2,$T2,&$addr(1));            # h1*r1
1669         &vpaddq         ($D2,$D2,$T2);                  # d2 += h1*r1
1670
1671         &vpmuludq       ($T0,$T1,&$addr(0));            # h3*r0
1672         &vpaddq         ($D3,$D3,$T0);                  # d3 += h3*r0
1673         &vpmuludq       ($T2,$T1,&$addr(1));            # h3*r1
1674         &vpaddq         ($D4,$D4,$T2);                  # d4 += h3*r1
1675         &vpmuludq       ($T0,$T1,&$addr(6));            # h3*s2
1676         &vpaddq         ($D0,$D0,$T0);                  # d0 += h3*s2
1677          &vmovdqa       ($T0,&QWP(32*4,"esp"));         # h4
1678         &vpmuludq       ($T2,$T1,&$addr(7));            # h3*s3
1679         &vpaddq         ($D1,$D1,$T2);                  # d1+= h3*s3
1680         &vpmuludq       ($T1,$T1,&$addr(8));            # h3*s4
1681         &vpaddq         ($D2,$D2,$T1);                  # d2 += h3*s4
1682
1683         &vpmuludq       ($T2,$T0,&$addr(8));            # h4*s4
1684         &vpaddq         ($D3,$D3,$T2);                  # d3 += h4*s4
1685         &vpmuludq       ($T1,$T0,&$addr(5));            # h4*s1
1686         &vpaddq         ($D0,$D0,$T1);                  # d0 += h4*s1
1687         &vpmuludq       ($T2,$T0,&$addr(0));            # h4*r0
1688         &vpaddq         ($D4,$D4,$T2);                  # d4 += h4*r0
1689          &vmovdqa       ($MASK,&QWP(64,"ebx"));
1690         &vpmuludq       ($T1,$T0,&$addr(6));            # h4*s2
1691         &vpaddq         ($D1,$D1,$T1);                  # d1 += h4*s2
1692         &vpmuludq       ($T0,$T0,&$addr(7));            # h4*s3
1693         &vpaddq         ($D2,$D2,$T0);                  # d2 += h4*s3
1694 }
1695         &vpmuladd       (sub {  my $i=shift; &QWP(32*$i-128,"edx");     });
1696
1697 sub vlazy_reduction {
1698         ################################################################
1699         # lazy reduction
1700
1701          &vpsrlq        ($T0,$D3,26);
1702          &vpand         ($D3,$D3,$MASK);
1703         &vpsrlq         ($T1,$D0,26);
1704         &vpand          ($D0,$D0,$MASK);
1705          &vpaddq        ($D4,$D4,$T0);                  # h3 -> h4
1706         &vpaddq         ($D1,$D1,$T1);                  # h0 -> h1
1707          &vpsrlq        ($T0,$D4,26);
1708          &vpand         ($D4,$D4,$MASK);
1709         &vpsrlq         ($T1,$D1,26);
1710         &vpand          ($D1,$D1,$MASK);
1711         &vpaddq         ($D2,$D2,$T1);                  # h1 -> h2
1712          &vpaddq        ($D0,$D0,$T0);
1713          &vpsllq        ($T0,$T0,2);
1714         &vpsrlq         ($T1,$D2,26);
1715         &vpand          ($D2,$D2,$MASK);
1716          &vpaddq        ($D0,$D0,$T0);                  # h4 -> h0
1717         &vpaddq         ($D3,$D3,$T1);                  # h2 -> h3
1718         &vpsrlq         ($T1,$D3,26);
1719          &vpsrlq        ($T0,$D0,26);
1720          &vpand         ($D0,$D0,$MASK);
1721         &vpand          ($D3,$D3,$MASK);
1722          &vpaddq        ($D1,$D1,$T0);                  # h0 -> h1
1723         &vpaddq         ($D4,$D4,$T1);                  # h3 -> h4
1724 }
1725         &vlazy_reduction();
1726
1727         &vmovdqu        (&X($T0),&QWP(16*0,"esi"));     # load input
1728         &vmovdqu        (&X($T1),&QWP(16*1,"esi"));
1729         &vinserti128    ($T0,$T0,&QWP(16*2,"esi"),1);
1730         &vinserti128    ($T1,$T1,&QWP(16*3,"esi"),1);
1731         &lea            ("esi",&DWP(16*4,"esi"));
1732         &sub            ("ecx",64);
1733         &jnz            (&label("loop"));
1734
1735 &set_label("tail");
1736         &vsplat_input   ();
1737         &and            ("ebx",-64);                    # restore pointer
1738
1739         &vpmuladd       (sub {  my $i=shift; &QWP(4+32*$i-128,"edx");   });
1740
1741         ################################################################
1742         # horizontal addition
1743
1744         &vpsrldq        ($T0,$D4,8);
1745         &vpsrldq        ($T1,$D3,8);
1746         &vpaddq         ($D4,$D4,$T0);
1747         &vpsrldq        ($T0,$D0,8);
1748         &vpaddq         ($D3,$D3,$T1);
1749         &vpsrldq        ($T1,$D1,8);
1750         &vpaddq         ($D0,$D0,$T0);
1751         &vpsrldq        ($T0,$D2,8);
1752         &vpaddq         ($D1,$D1,$T1);
1753         &vpermq         ($T1,$D4,2);                    # keep folding
1754         &vpaddq         ($D2,$D2,$T0);
1755         &vpermq         ($T0,$D3,2);
1756         &vpaddq         ($D4,$D4,$T1);
1757         &vpermq         ($T1,$D0,2);
1758         &vpaddq         ($D3,$D3,$T0);
1759         &vpermq         ($T0,$D1,2);
1760         &vpaddq         ($D0,$D0,$T1);
1761         &vpermq         ($T1,$D2,2);
1762         &vpaddq         ($D1,$D1,$T0);
1763         &vpaddq         ($D2,$D2,$T1);
1764
1765         &vlazy_reduction();
1766
1767         &cmp            ("ecx",0);
1768         &je             (&label("done"));
1769
1770         ################################################################
1771         # clear all but single word
1772
1773         &vpshufd        (&X($D0),&X($D0),0b11111100);
1774         &lea            ("edx",&DWP(32*5+128,"esp"));   # restore pointer
1775         &vpshufd        (&X($D1),&X($D1),0b11111100);
1776         &vpshufd        (&X($D2),&X($D2),0b11111100);
1777         &vpshufd        (&X($D3),&X($D3),0b11111100);
1778         &vpshufd        (&X($D4),&X($D4),0b11111100);
1779         &jmp            (&label("even"));
1780
1781 &set_label("done",16);
1782         &vmovd          (&DWP(-16*3+4*0,"edi"),&X($D0));# store hash value
1783         &vmovd          (&DWP(-16*3+4*1,"edi"),&X($D1));
1784         &vmovd          (&DWP(-16*3+4*2,"edi"),&X($D2));
1785         &vmovd          (&DWP(-16*3+4*3,"edi"),&X($D3));
1786         &vmovd          (&DWP(-16*3+4*4,"edi"),&X($D4));
1787         &vzeroupper     ();
1788         &mov    ("esp","ebp");
1789 &set_label("nodata");
1790 &function_end("_poly1305_blocks_avx2");
1791 }
1792 &set_label("const_sse2",64);
1793         &data_word(1<<24,0,     1<<24,0,        1<<24,0,        1<<24,0);
1794         &data_word(0,0,         0,0,            0,0,            0,0);
1795         &data_word(0x03ffffff,0,0x03ffffff,0,   0x03ffffff,0,   0x03ffffff,0);
1796         &data_word(0x0fffffff,0x0ffffffc,0x0ffffffc,0x0ffffffc);
1797 }
1798 &asciz  ("Poly1305 for x86, CRYPTOGAMS by <appro\@openssl.org>");
1799 &align  (4);
1800
1801 &asm_finish();
1802
1803 close STDOUT;