crypto/sha/asm/sha1-c64xplus.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2012-2016 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9 #
  10 # ====================================================================
  11 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
  12 # project. The module is, however, dual licensed under OpenSSL and
  13 # CRYPTOGAMS licenses depending on where you obtain it. For further
  14 # details see http://www.openssl.org/~appro/cryptogams/.
  15 # ====================================================================
  16 #
  17 # SHA1 for C64x+.
  18 #
  19 # November 2011
  20 #
  21 # If compared to compiler-generated code with similar characteristics,
  22 # i.e. compiled with OPENSSL_SMALL_FOOTPRINT and utilizing SPLOOPs,
  23 # this implementation is 25% smaller and >2x faster. In absolute terms
  24 # performance is (quite impressive) ~6.5 cycles per processed byte.
  25 # Fully unrolled assembler would be ~5x larger and is likely to be
  26 # ~15% faster. It would be free from references to intermediate ring
  27 # buffer, but put more pressure on L1P [both because the code would be
  28 # larger and won't be using SPLOOP buffer]. There are no plans to
  29 # realize fully unrolled variant though...
  30 #
  31 # !!! Note that this module uses AMR, which means that all interrupt
  32 # service routines are expected to preserve it and for own well-being
  33 # zero it upon entry.
  34
  35 $output = pop and open STDOUT,">$output";
  36
  37 ($CTX,$INP,$NUM) = ("A4","B4","A6");            # arguments
  38
  39 ($A,$B,$C,$D,$E, $Arot,$F,$F0,$T,$K) = map("A$_",(16..20, 21..25));
  40 ($X0,$X2,$X8,$X13) = ("A26","B26","A27","B27");
  41 ($TX0,$TX1,$TX2,$TX3) = map("B$_",(28..31));
  42 ($XPA,$XPB) = ("A5","B5");                      # X circular buffer
  43 ($Actx,$Bctx,$Cctx,$Dctx,$Ectx) = map("A$_",(3,6..9));  # zaps $NUM
  44
  45 $code=<<___;
  46         .text
  47
  48         .if     .ASSEMBLER_VERSION<7000000
  49         .asg    0,__TI_EABI__
  50         .endif
  51         .if     __TI_EABI__
  52         .asg    sha1_block_data_order,_sha1_block_data_order
  53         .endif
  54
  55         .asg    B3,RA
  56         .asg    A15,FP
  57         .asg    B15,SP
  58
  59         .if     .BIG_ENDIAN
  60         .asg    MV,SWAP2
  61         .asg    MV,SWAP4
  62         .endif
  63
  64         .global _sha1_block_data_order
  65 _sha1_block_data_order:
  66         .asmfunc stack_usage(64)
  67         MV      $NUM,A0                 ; reassign $NUM
  68 ||      MVK     -64,B0
  69   [!A0] BNOP    RA                      ; if ($NUM==0) return;
  70 || [A0] STW     FP,*SP--[16]            ; save frame pointer and alloca(64)
  71 || [A0] MV      SP,FP
  72    [A0] LDW     *${CTX}[0],$A           ; load A-E...
  73 || [A0] AND     B0,SP,SP                ; align stack at 64 bytes
  74    [A0] LDW     *${CTX}[1],$B
  75 || [A0] SUBAW   SP,2,SP                 ; reserve two words above buffer
  76    [A0] LDW     *${CTX}[2],$C
  77 || [A0] MVK     0x00404,B0
  78    [A0] LDW     *${CTX}[3],$D
  79 || [A0] MVKH    0x50000,B0              ; 0x050404, 64 bytes for $XP[AB]
  80    [A0] LDW     *${CTX}[4],$E
  81 || [A0] MVC     B0,AMR                  ; setup circular addressing
  82         LDNW    *${INP}++,$TX1          ; pre-fetch input
  83         NOP     1
  84
  85 loop?:
  86         MVK     0x00007999,$K
  87 ||      ADDAW   SP,2,$XPA
  88 ||      SUB     A0,1,A0
  89 ||      MVK     13,B0
  90         MVKH    0x5a820000,$K           ; K_00_19
  91 ||      ADDAW   SP,2,$XPB
  92 ||      MV      $A,$Actx
  93 ||      MV      $B,$Bctx
  94 ;;==================================================
  95         SPLOOPD 5                       ; BODY_00_13
  96 ||      MV      $C,$Cctx
  97 ||      MV      $D,$Dctx
  98 ||      MV      $E,$Ectx
  99 ||      MVC     B0,ILC
 100
 101         ROTL    $A,5,$Arot
 102 ||      AND     $C,$B,$F
 103 ||      ANDN    $D,$B,$F0
 104 ||      ADD     $K,$E,$T                ; T=E+K
 105
 106         XOR     $F0,$F,$F               ; F_00_19(B,C,D)
 107 ||      MV      $D,$E                   ; E=D
 108 ||      MV      $C,$D                   ; D=C
 109 ||      SWAP2   $TX1,$TX2
 110 ||      LDNW    *${INP}++,$TX1
 111
 112         ADD     $F,$T,$T                ; T+=F_00_19(B,C,D)
 113 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 114 ||      SWAP4   $TX2,$TX3               ; byte swap
 115
 116         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 117 ||      MV      $A,$B                   ; B=A
 118
 119         ADD     $TX3,$T,$A              ; A=T+Xi
 120 ||      STW     $TX3,*${XPB}++
 121         SPKERNEL
 122 ;;==================================================
 123         ROTL    $A,5,$Arot              ; BODY_14
 124 ||      AND     $C,$B,$F
 125 ||      ANDN    $D,$B,$F0
 126 ||      ADD     $K,$E,$T                ; T=E+K
 127
 128         XOR     $F0,$F,$F               ; F_00_19(B,C,D)
 129 ||      MV      $D,$E                   ; E=D
 130 ||      MV      $C,$D                   ; D=C
 131 ||      SWAP2   $TX1,$TX2
 132 ||      LDNW    *${INP}++,$TX1
 133
 134         ADD     $F,$T,$T                ; T+=F_00_19(B,C,D)
 135 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 136 ||      SWAP4   $TX2,$TX2               ; byte swap
 137 ||      LDW     *${XPA}++,$X0           ; fetches from X ring buffer are
 138 ||      LDW     *${XPB}[4],$X2          ; 2 iterations ahead
 139
 140         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 141 ||      MV      $A,$B                   ; B=A
 142 ||      LDW     *${XPA}[7],$X8
 143 ||      MV      $TX3,$X13               ; ||    LDW     *${XPB}[15],$X13
 144 ||      MV      $TX2,$TX3
 145
 146         ADD     $TX2,$T,$A              ; A=T+Xi
 147 ||      STW     $TX2,*${XPB}++
 148 ;;==================================================
 149         ROTL    $A,5,$Arot              ; BODY_15
 150 ||      AND     $C,$B,$F
 151 ||      ANDN    $D,$B,$F0
 152 ||      ADD     $K,$E,$T                ; T=E+K
 153
 154         XOR     $F0,$F,$F               ; F_00_19(B,C,D)
 155 ||      MV      $D,$E                   ; E=D
 156 ||      MV      $C,$D                   ; D=C
 157 ||      SWAP2   $TX1,$TX2
 158
 159         ADD     $F,$T,$T                ; T+=F_00_19(B,C,D)
 160 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 161 ||      SWAP4   $TX2,$TX2               ; byte swap
 162 ||      XOR     $X0,$X2,$TX0            ; Xupdate XORs are 1 iteration ahead
 163 ||      LDW     *${XPA}++,$X0
 164 ||      LDW     *${XPB}[4],$X2
 165
 166         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 167 ||      MV      $A,$B                   ; B=A
 168 ||      XOR     $X8,$X13,$TX1
 169 ||      LDW     *${XPA}[7],$X8
 170 ||      MV      $TX3,$X13               ; ||    LDW     *${XPB}[15],$X13
 171 ||      MV      $TX2,$TX3
 172
 173         ADD     $TX2,$T,$A              ; A=T+Xi
 174 ||      STW     $TX2,*${XPB}++
 175 ||      XOR     $TX0,$TX1,$TX1
 176 ||      MVK     3,B0
 177 ;;==================================================
 178         SPLOOPD 5                       ; BODY_16_19
 179 ||      MVC     B0,ILC
 180
 181         ROTL    $A,5,$Arot
 182 ||      AND     $C,$B,$F
 183 ||      ANDN    $D,$B,$F0
 184 ||      ADD     $K,$E,$T                ; T=E+K
 185 ||      ROTL    $TX1,1,$TX2             ; Xupdate output
 186
 187         XOR     $F0,$F,$F               ; F_00_19(B,C,D)
 188 ||      MV      $D,$E                   ; E=D
 189 ||      MV      $C,$D                   ; D=C
 190
 191         ADD     $F,$T,$T                ; T+=F_00_19(B,C,D)
 192 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 193 ||      XOR     $X0,$X2,$TX0
 194 ||      LDW     *${XPA}++,$X0
 195 ||      LDW     *${XPB}[4],$X2
 196
 197         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 198 ||      MV      $A,$B                   ; B=A
 199 ||      XOR     $X8,$X13,$TX1
 200 ||      LDW     *${XPA}[7],$X8
 201 ||      MV      $TX3,$X13               ; ||    LDW     *${XPB}[15],$X13
 202 ||      MV      $TX2,$TX3
 203
 204         ADD     $TX2,$T,$A              ; A=T+Xi
 205 ||      STW     $TX2,*${XPB}++
 206 ||      XOR     $TX0,$TX1,$TX1
 207         SPKERNEL
 208
 209         MVK     0xffffeba1,$K
 210 ||      MVK     19,B0
 211         MVKH    0x6ed90000,$K           ; K_20_39
 212 ___
 213 sub BODY_20_39 {
 214 $code.=<<___;
 215 ;;==================================================
 216         SPLOOPD 5                       ; BODY_20_39
 217 ||      MVC     B0,ILC
 218
 219         ROTL    $A,5,$Arot
 220 ||      XOR     $B,$C,$F
 221 ||      ADD     $K,$E,$T                ; T=E+K
 222 ||      ROTL    $TX1,1,$TX2             ; Xupdate output
 223
 224         XOR     $D,$F,$F                ; F_20_39(B,C,D)
 225 ||      MV      $D,$E                   ; E=D
 226 ||      MV      $C,$D                   ; D=C
 227
 228         ADD     $F,$T,$T                ; T+=F_20_39(B,C,D)
 229 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 230 ||      XOR     $X0,$X2,$TX0
 231 ||      LDW     *${XPA}++,$X0
 232 ||      LDW     *${XPB}[4],$X2
 233
 234         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 235 ||      MV      $A,$B                   ; B=A
 236 ||      XOR     $X8,$X13,$TX1
 237 ||      LDW     *${XPA}[7],$X8
 238 ||      MV      $TX3,$X13               ; ||    LDW     *${XPB}[15],$X13
 239 ||      MV      $TX2,$TX3
 240
 241         ADD     $TX2,$T,$A              ; A=T+Xi
 242 ||      STW     $TX2,*${XPB}++          ; last one is redundant
 243 ||      XOR     $TX0,$TX1,$TX1
 244         SPKERNEL
 245 ___
 246 $code.=<<___ if (!shift);
 247         MVK     0xffffbcdc,$K
 248         MVKH    0x8f1b0000,$K           ; K_40_59
 249 ___
 250 }       &BODY_20_39();
 251 $code.=<<___;
 252 ;;==================================================
 253         SPLOOPD 5                       ; BODY_40_59
 254 ||      MVC     B0,ILC
 255 ||      AND     $B,$C,$F
 256 ||      AND     $B,$D,$F0
 257
 258         ROTL    $A,5,$Arot
 259 ||      XOR     $F0,$F,$F
 260 ||      AND     $C,$D,$F0
 261 ||      ADD     $K,$E,$T                ; T=E+K
 262 ||      ROTL    $TX1,1,$TX2             ; Xupdate output
 263
 264         XOR     $F0,$F,$F               ; F_40_59(B,C,D)
 265 ||      MV      $D,$E                   ; E=D
 266 ||      MV      $C,$D                   ; D=C
 267
 268         ADD     $F,$T,$T                ; T+=F_40_59(B,C,D)
 269 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 270 ||      XOR     $X0,$X2,$TX0
 271 ||      LDW     *${XPA}++,$X0
 272 ||      LDW     *${XPB}[4],$X2
 273
 274         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 275 ||      MV      $A,$B                   ; B=A
 276 ||      XOR     $X8,$X13,$TX1
 277 ||      LDW     *${XPA}[7],$X8
 278 ||      MV      $TX3,$X13               ; ||    LDW     *${XPB}[15],$X13
 279 ||      MV      $TX2,$TX3
 280
 281         ADD     $TX2,$T,$A              ; A=T+Xi
 282 ||      STW     $TX2,*${XPB}++
 283 ||      XOR     $TX0,$TX1,$TX1
 284 ||      AND     $B,$C,$F
 285 ||      AND     $B,$D,$F0
 286         SPKERNEL
 287
 288         MVK     0xffffc1d6,$K
 289 ||      MVK     18,B0
 290         MVKH    0xca620000,$K           ; K_60_79
 291 ___
 292         &BODY_20_39(-1);                # BODY_60_78
 293 $code.=<<___;
 294 ;;==================================================
 295    [A0] B       loop?
 296 ||      ROTL    $A,5,$Arot              ; BODY_79
 297 ||      XOR     $B,$C,$F
 298 ||      ROTL    $TX1,1,$TX2             ; Xupdate output
 299
 300    [A0] LDNW    *${INP}++,$TX1          ; pre-fetch input
 301 ||      ADD     $K,$E,$T                ; T=E+K
 302 ||      XOR     $D,$F,$F                ; F_20_39(B,C,D)
 303
 304         ADD     $F,$T,$T                ; T+=F_20_39(B,C,D)
 305 ||      ADD     $Ectx,$D,$E             ; E=D,E+=Ectx
 306 ||      ADD     $Dctx,$C,$D             ; D=C,D+=Dctx
 307 ||      ROTL    $B,30,$C                ; C=ROL(B,30)
 308
 309         ADD     $Arot,$T,$T             ; T+=ROL(A,5)
 310 ||      ADD     $Bctx,$A,$B             ; B=A,B+=Bctx
 311
 312         ADD     $TX2,$T,$A              ; A=T+Xi
 313
 314         ADD     $Actx,$A,$A             ; A+=Actx
 315 ||      ADD     $Cctx,$C,$C             ; C+=Cctx
 316 ;; end of loop?
 317
 318         BNOP    RA                      ; return
 319 ||      MV      FP,SP                   ; restore stack pointer
 320 ||      LDW     *FP[0],FP               ; restore frame pointer
 321         STW     $A,*${CTX}[0]           ; emit A-E...
 322 ||      MVK     0,B0
 323         STW     $B,*${CTX}[1]
 324 ||      MVC     B0,AMR                  ; clear AMR
 325         STW     $C,*${CTX}[2]
 326         STW     $D,*${CTX}[3]
 327         STW     $E,*${CTX}[4]
 328         .endasmfunc
 329
 330         .sect   .const
 331         .cstring "SHA1 block transform for C64x+, CRYPTOGAMS by <appro\@openssl.org>"
 332         .align  4
 333 ___
 334
 335 print $code;
 336 close STDOUT or die "error closing STDOUT: $!";