release/src/router/openssl/crypto/bn/asm/x86_64-gf2m.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 # May 2011
  11 #
  12 # The module implements bn_GF2m_mul_2x2 polynomial multiplication used
  13 # in bn_gf2m.c. It's kind of low-hanging mechanical port from C for
  14 # the time being... Except that it has two code paths: code suitable
  15 # for any x86_64 CPU and PCLMULQDQ one suitable for Westmere and
  16 # later. Improvement varies from one benchmark and µ-arch to another.
  17 # Vanilla code path is at most 20% faster than compiler-generated code
  18 # [not very impressive], while PCLMULQDQ - whole 85%-160% better on
  19 # 163- and 571-bit ECDH benchmarks on Intel CPUs. Keep in mind that
  20 # these coefficients are not ones for bn_GF2m_mul_2x2 itself, as not
  21 # all CPU time is burnt in it...
  22
  23 $flavour = shift;
  24 $output  = shift;
  25 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
  26
  27 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  28
  29 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  30 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  31 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
  32 die "can't locate x86_64-xlate.pl";
  33
  34 open STDOUT,"| $^X $xlate $flavour $output";
  35
  36 ($lo,$hi)=("%rax","%rdx");      $a=$lo;
  37 ($i0,$i1)=("%rsi","%rdi");
  38 ($t0,$t1)=("%rbx","%rcx");
  39 ($b,$mask)=("%rbp","%r8");
  40 ($a1,$a2,$a4,$a8,$a12,$a48)=map("%r$_",(9..15));
  41 ($R,$Tx)=("%xmm0","%xmm1");
  42
  43 $code.=<<___;
  44 .text
  45
  46 .type   _mul_1x1,\@abi-omnipotent
  47 .align  16
  48 _mul_1x1:
  49         sub     \$128+8,%rsp
  50         mov     \$-1,$a1
  51         lea     ($a,$a),$i0
  52         shr     \$3,$a1
  53         lea     (,$a,4),$i1
  54         and     $a,$a1                  # a1=a&0x1fffffffffffffff
  55         lea     (,$a,8),$a8
  56         sar     \$63,$a                 # broadcast 63rd bit
  57         lea     ($a1,$a1),$a2
  58         sar     \$63,$i0                # broadcast 62nd bit
  59         lea     (,$a1,4),$a4
  60         and     $b,$a
  61         sar     \$63,$i1                # boardcast 61st bit
  62         mov     $a,$hi                  # $a is $lo
  63         shl     \$63,$lo
  64         and     $b,$i0
  65         shr     \$1,$hi
  66         mov     $i0,$t1
  67         shl     \$62,$i0
  68         and     $b,$i1
  69         shr     \$2,$t1
  70         xor     $i0,$lo
  71         mov     $i1,$t0
  72         shl     \$61,$i1
  73         xor     $t1,$hi
  74         shr     \$3,$t0
  75         xor     $i1,$lo
  76         xor     $t0,$hi
  77
  78         mov     $a1,$a12
  79         movq    \$0,0(%rsp)             # tab[0]=0
  80         xor     $a2,$a12                # a1^a2
  81         mov     $a1,8(%rsp)             # tab[1]=a1
  82          mov    $a4,$a48
  83         mov     $a2,16(%rsp)            # tab[2]=a2
  84          xor    $a8,$a48                # a4^a8
  85         mov     $a12,24(%rsp)           # tab[3]=a1^a2
  86
  87         xor     $a4,$a1
  88         mov     $a4,32(%rsp)            # tab[4]=a4
  89         xor     $a4,$a2
  90         mov     $a1,40(%rsp)            # tab[5]=a1^a4
  91         xor     $a4,$a12
  92         mov     $a2,48(%rsp)            # tab[6]=a2^a4
  93          xor    $a48,$a1                # a1^a4^a4^a8=a1^a8
  94         mov     $a12,56(%rsp)           # tab[7]=a1^a2^a4
  95          xor    $a48,$a2                # a2^a4^a4^a8=a1^a8
  96
  97         mov     $a8,64(%rsp)            # tab[8]=a8
  98         xor     $a48,$a12               # a1^a2^a4^a4^a8=a1^a2^a8
  99         mov     $a1,72(%rsp)            # tab[9]=a1^a8
 100          xor    $a4,$a1                 # a1^a8^a4
 101         mov     $a2,80(%rsp)            # tab[10]=a2^a8
 102          xor    $a4,$a2                 # a2^a8^a4
 103         mov     $a12,88(%rsp)           # tab[11]=a1^a2^a8
 104
 105         xor     $a4,$a12                # a1^a2^a8^a4
 106         mov     $a48,96(%rsp)           # tab[12]=a4^a8
 107          mov    $mask,$i0
 108         mov     $a1,104(%rsp)           # tab[13]=a1^a4^a8
 109          and    $b,$i0
 110         mov     $a2,112(%rsp)           # tab[14]=a2^a4^a8
 111          shr    \$4,$b
 112         mov     $a12,120(%rsp)          # tab[15]=a1^a2^a4^a8
 113          mov    $mask,$i1
 114          and    $b,$i1
 115          shr    \$4,$b
 116
 117         movq    (%rsp,$i0,8),$R         # half of calculations is done in SSE2
 118         mov     $mask,$i0
 119         and     $b,$i0
 120         shr     \$4,$b
 121 ___
 122     for ($n=1;$n<8;$n++) {
 123         $code.=<<___;
 124         mov     (%rsp,$i1,8),$t1
 125         mov     $mask,$i1
 126         mov     $t1,$t0
 127         shl     \$`8*$n-4`,$t1
 128         and     $b,$i1
 129          movq   (%rsp,$i0,8),$Tx
 130         shr     \$`64-(8*$n-4)`,$t0
 131         xor     $t1,$lo
 132          pslldq \$$n,$Tx
 133          mov    $mask,$i0
 134         shr     \$4,$b
 135         xor     $t0,$hi
 136          and    $b,$i0
 137          shr    \$4,$b
 138          pxor   $Tx,$R
 139 ___
 140     }
 141 $code.=<<___;
 142         mov     (%rsp,$i1,8),$t1
 143         mov     $t1,$t0
 144         shl     \$`8*$n-4`,$t1
 145         movq    $R,$i0
 146         shr     \$`64-(8*$n-4)`,$t0
 147         xor     $t1,$lo
 148         psrldq  \$8,$R
 149         xor     $t0,$hi
 150         movq    $R,$i1
 151         xor     $i0,$lo
 152         xor     $i1,$hi
 153
 154         add     \$128+8,%rsp
 155         ret
 156 .Lend_mul_1x1:
 157 .size   _mul_1x1,.-_mul_1x1
 158 ___
 159
 160 ($rp,$a1,$a0,$b1,$b0) = $win64? ("%rcx","%rdx","%r8", "%r9","%r10") :   # Win64 order
 161                                 ("%rdi","%rsi","%rdx","%rcx","%r8");    # Unix order
 162
 163 $code.=<<___;
 164 .extern OPENSSL_ia32cap_P
 165 .globl  bn_GF2m_mul_2x2
 166 .type   bn_GF2m_mul_2x2,\@abi-omnipotent
 167 .align  16
 168 bn_GF2m_mul_2x2:
 169         mov     OPENSSL_ia32cap_P(%rip),%rax
 170         bt      \$33,%rax
 171         jnc     .Lvanilla_mul_2x2
 172
 173         movq            $a1,%xmm0
 174         movq            $b1,%xmm1
 175         movq            $a0,%xmm2
 176 ___
 177 $code.=<<___ if ($win64);
 178         movq            40(%rsp),%xmm3
 179 ___
 180 $code.=<<___ if (!$win64);
 181         movq            $b0,%xmm3
 182 ___
 183 $code.=<<___;
 184         movdqa          %xmm0,%xmm4
 185         movdqa          %xmm1,%xmm5
 186         pclmulqdq       \$0,%xmm1,%xmm0 # a1·b1
 187         pxor            %xmm2,%xmm4
 188         pxor            %xmm3,%xmm5
 189         pclmulqdq       \$0,%xmm3,%xmm2 # a0·b0
 190         pclmulqdq       \$0,%xmm5,%xmm4 # (a0+a1)·(b0+b1)
 191         xorps           %xmm0,%xmm4
 192         xorps           %xmm2,%xmm4     # (a0+a1)·(b0+b1)-a0·b0-a1·b1
 193         movdqa          %xmm4,%xmm5
 194         pslldq          \$8,%xmm4
 195         psrldq          \$8,%xmm5
 196         pxor            %xmm4,%xmm2
 197         pxor            %xmm5,%xmm0
 198         movdqu          %xmm2,0($rp)
 199         movdqu          %xmm0,16($rp)
 200         ret
 201
 202 .align  16
 203 .Lvanilla_mul_2x2:
 204         lea     -8*17(%rsp),%rsp
 205 ___
 206 $code.=<<___ if ($win64);
 207         mov     `8*17+40`(%rsp),$b0
 208         mov     %rdi,8*15(%rsp)
 209         mov     %rsi,8*16(%rsp)
 210 ___
 211 $code.=<<___;
 212         mov     %r14,8*10(%rsp)
 213         mov     %r13,8*11(%rsp)
 214         mov     %r12,8*12(%rsp)
 215         mov     %rbp,8*13(%rsp)
 216         mov     %rbx,8*14(%rsp)
 217 .Lbody_mul_2x2:
 218         mov     $rp,32(%rsp)            # save the arguments
 219         mov     $a1,40(%rsp)
 220         mov     $a0,48(%rsp)
 221         mov     $b1,56(%rsp)
 222         mov     $b0,64(%rsp)
 223
 224         mov     \$0xf,$mask
 225         mov     $a1,$a
 226         mov     $b1,$b
 227         call    _mul_1x1                # a1·b1
 228         mov     $lo,16(%rsp)
 229         mov     $hi,24(%rsp)
 230
 231         mov     48(%rsp),$a
 232         mov     64(%rsp),$b
 233         call    _mul_1x1                # a0·b0
 234         mov     $lo,0(%rsp)
 235         mov     $hi,8(%rsp)
 236
 237         mov     40(%rsp),$a
 238         mov     56(%rsp),$b
 239         xor     48(%rsp),$a
 240         xor     64(%rsp),$b
 241         call    _mul_1x1                # (a0+a1)·(b0+b1)
 242 ___
 243         @r=("%rbx","%rcx","%rdi","%rsi");
 244 $code.=<<___;
 245         mov     0(%rsp),@r[0]
 246         mov     8(%rsp),@r[1]
 247         mov     16(%rsp),@r[2]
 248         mov     24(%rsp),@r[3]
 249         mov     32(%rsp),%rbp
 250
 251         xor     $hi,$lo
 252         xor     @r[1],$hi
 253         xor     @r[0],$lo
 254         mov     @r[0],0(%rbp)
 255         xor     @r[2],$hi
 256         mov     @r[3],24(%rbp)
 257         xor     @r[3],$lo
 258         xor     @r[3],$hi
 259         xor     $hi,$lo
 260         mov     $hi,16(%rbp)
 261         mov     $lo,8(%rbp)
 262
 263         mov     8*10(%rsp),%r14
 264         mov     8*11(%rsp),%r13
 265         mov     8*12(%rsp),%r12
 266         mov     8*13(%rsp),%rbp
 267         mov     8*14(%rsp),%rbx
 268 ___
 269 $code.=<<___ if ($win64);
 270         mov     8*15(%rsp),%rdi
 271         mov     8*16(%rsp),%rsi
 272 ___
 273 $code.=<<___;
 274         lea     8*17(%rsp),%rsp
 275         ret
 276 .Lend_mul_2x2:
 277 .size   bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
 278 .asciz  "GF(2^m) Multiplication for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
 279 .align  16
 280 ___
 281
 282 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
 283 #               CONTEXT *context,DISPATCHER_CONTEXT *disp)
 284 if ($win64) {
 285 $rec="%rcx";
 286 $frame="%rdx";
 287 $context="%r8";
 288 $disp="%r9";
 289
 290 $code.=<<___;
 291 .extern __imp_RtlVirtualUnwind
 292
 293 .type   se_handler,\@abi-omnipotent
 294 .align  16
 295 se_handler:
 296         push    %rsi
 297         push    %rdi
 298         push    %rbx
 299         push    %rbp
 300         push    %r12
 301         push    %r13
 302         push    %r14
 303         push    %r15
 304         pushfq
 305         sub     \$64,%rsp
 306
 307         mov     152($context),%rax      # pull context->Rsp
 308         mov     248($context),%rbx      # pull context->Rip
 309
 310         lea     .Lbody_mul_2x2(%rip),%r10
 311         cmp     %r10,%rbx               # context->Rip<"prologue" label
 312         jb      .Lin_prologue
 313
 314         mov     8*10(%rax),%r14         # mimic epilogue
 315         mov     8*11(%rax),%r13
 316         mov     8*12(%rax),%r12
 317         mov     8*13(%rax),%rbp
 318         mov     8*14(%rax),%rbx
 319         mov     8*15(%rax),%rdi
 320         mov     8*16(%rax),%rsi
 321
 322         mov     %rbx,144($context)      # restore context->Rbx
 323         mov     %rbp,160($context)      # restore context->Rbp
 324         mov     %rsi,168($context)      # restore context->Rsi
 325         mov     %rdi,176($context)      # restore context->Rdi
 326         mov     %r12,216($context)      # restore context->R12
 327         mov     %r13,224($context)      # restore context->R13
 328         mov     %r14,232($context)      # restore context->R14
 329
 330 .Lin_prologue:
 331         lea     8*17(%rax),%rax
 332         mov     %rax,152($context)      # restore context->Rsp
 333
 334         mov     40($disp),%rdi          # disp->ContextRecord
 335         mov     $context,%rsi           # context
 336         mov     \$154,%ecx              # sizeof(CONTEXT)
 337         .long   0xa548f3fc              # cld; rep movsq
 338
 339         mov     $disp,%rsi
 340         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
 341         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
 342         mov     0(%rsi),%r8             # arg3, disp->ControlPc
 343         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
 344         mov     40(%rsi),%r10           # disp->ContextRecord
 345         lea     56(%rsi),%r11           # &disp->HandlerData
 346         lea     24(%rsi),%r12           # &disp->EstablisherFrame
 347         mov     %r10,32(%rsp)           # arg5
 348         mov     %r11,40(%rsp)           # arg6
 349         mov     %r12,48(%rsp)           # arg7
 350         mov     %rcx,56(%rsp)           # arg8, (NULL)
 351         call    *__imp_RtlVirtualUnwind(%rip)
 352
 353         mov     \$1,%eax                # ExceptionContinueSearch
 354         add     \$64,%rsp
 355         popfq
 356         pop     %r15
 357         pop     %r14
 358         pop     %r13
 359         pop     %r12
 360         pop     %rbp
 361         pop     %rbx
 362         pop     %rdi
 363         pop     %rsi
 364         ret
 365 .size   se_handler,.-se_handler
 366
 367 .section        .pdata
 368 .align  4
 369         .rva    _mul_1x1
 370         .rva    .Lend_mul_1x1
 371         .rva    .LSEH_info_1x1
 372
 373         .rva    .Lvanilla_mul_2x2
 374         .rva    .Lend_mul_2x2
 375         .rva    .LSEH_info_2x2
 376 .section        .xdata
 377 .align  8
 378 .LSEH_info_1x1:
 379         .byte   0x01,0x07,0x02,0x00
 380         .byte   0x07,0x01,0x11,0x00     # sub rsp,128+8
 381 .LSEH_info_2x2:
 382         .byte   9,0,0,0
 383         .rva    se_handler
 384 ___
 385 }
 386
 387 $code =~ s/\`([^\`]*)\`/eval($1)/gem;
 388 print $code;
 389 close STDOUT;