| 1 | #! /usr/bin/env perl
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| 2 | # Copyright 2012-2020 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | #
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| 4 | # Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | # this file except in compliance with the License. You can obtain a copy
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| 6 | # in the file LICENSE in the source distribution or at
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| 7 | # https://www.openssl.org/source/license.html
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| 8 |
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| 9 | #
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| 10 | # ====================================================================
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| 11 | # Written by Andy Polyakov <[email protected]> for the OpenSSL
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| 12 | # project. The module is, however, dual licensed under OpenSSL and
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| 13 | # CRYPTOGAMS licenses depending on where you obtain it. For further
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| 14 | # details see http://www.openssl.org/~appro/cryptogams/.
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| 15 | # ====================================================================
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| 16 | #
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| 17 | # SHA1 for C64x+.
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| 18 | #
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| 19 | # November 2011
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| 20 | #
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| 21 | # If compared to compiler-generated code with similar characteristics,
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| 22 | # i.e. compiled with OPENSSL_SMALL_FOOTPRINT and utilizing SPLOOPs,
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| 23 | # this implementation is 25% smaller and >2x faster. In absolute terms
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| 24 | # performance is (quite impressive) ~6.5 cycles per processed byte.
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| 25 | # Fully unrolled assembler would be ~5x larger and is likely to be
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| 26 | # ~15% faster. It would be free from references to intermediate ring
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| 27 | # buffer, but put more pressure on L1P [both because the code would be
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| 28 | # larger and won't be using SPLOOP buffer]. There are no plans to
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| 29 | # realize fully unrolled variant though...
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| 30 | #
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| 31 | # !!! Note that this module uses AMR, which means that all interrupt
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| 32 | # service routines are expected to preserve it and for own well-being
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| 33 | # zero it upon entry.
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| 34 |
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| 35 | $output = pop and open STDOUT,">$output";
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| 36 |
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| 37 | ($CTX,$INP,$NUM) = ("A4","B4","A6"); # arguments
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| 38 |
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| 39 | ($A,$B,$C,$D,$E, $Arot,$F,$F0,$T,$K) = map("A$_",(16..20, 21..25));
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| 40 | ($X0,$X2,$X8,$X13) = ("A26","B26","A27","B27");
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| 41 | ($TX0,$TX1,$TX2,$TX3) = map("B$_",(28..31));
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| 42 | ($XPA,$XPB) = ("A5","B5"); # X circular buffer
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| 43 | ($Actx,$Bctx,$Cctx,$Dctx,$Ectx) = map("A$_",(3,6..9)); # zaps $NUM
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| 44 |
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| 45 | $code=<<___;
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| 46 | .text
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| 47 |
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| 48 | .if .ASSEMBLER_VERSION<7000000
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| 49 | .asg 0,__TI_EABI__
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| 50 | .endif
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| 51 | .if __TI_EABI__
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| 52 | .asg sha1_block_data_order,_sha1_block_data_order
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| 53 | .endif
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| 54 |
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| 55 | .asg B3,RA
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| 56 | .asg A15,FP
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| 57 | .asg B15,SP
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| 58 |
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| 59 | .if .BIG_ENDIAN
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| 60 | .asg MV,SWAP2
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| 61 | .asg MV,SWAP4
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| 62 | .endif
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| 63 |
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| 64 | .global _sha1_block_data_order
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| 65 | _sha1_block_data_order:
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| 66 | .asmfunc stack_usage(64)
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| 67 | MV $NUM,A0 ; reassign $NUM
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| 68 | || MVK -64,B0
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| 69 | [!A0] BNOP RA ; if ($NUM==0) return;
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| 70 | || [A0] STW FP,*SP--[16] ; save frame pointer and alloca(64)
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| 71 | || [A0] MV SP,FP
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| 72 | [A0] LDW *${CTX}[0],$A ; load A-E...
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| 73 | || [A0] AND B0,SP,SP ; align stack at 64 bytes
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| 74 | [A0] LDW *${CTX}[1],$B
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| 75 | || [A0] SUBAW SP,2,SP ; reserve two words above buffer
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| 76 | [A0] LDW *${CTX}[2],$C
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| 77 | || [A0] MVK 0x00404,B0
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| 78 | [A0] LDW *${CTX}[3],$D
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| 79 | || [A0] MVKH 0x50000,B0 ; 0x050404, 64 bytes for $XP[AB]
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| 80 | [A0] LDW *${CTX}[4],$E
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| 81 | || [A0] MVC B0,AMR ; setup circular addressing
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| 82 | LDNW *${INP}++,$TX1 ; pre-fetch input
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| 83 | NOP 1
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| 84 |
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| 85 | loop?:
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| 86 | MVK 0x00007999,$K
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| 87 | || ADDAW SP,2,$XPA
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| 88 | || SUB A0,1,A0
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| 89 | || MVK 13,B0
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| 90 | MVKH 0x5a820000,$K ; K_00_19
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| 91 | || ADDAW SP,2,$XPB
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| 92 | || MV $A,$Actx
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| 93 | || MV $B,$Bctx
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| 94 | ;;==================================================
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| 95 | SPLOOPD 5 ; BODY_00_13
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| 96 | || MV $C,$Cctx
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| 97 | || MV $D,$Dctx
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| 98 | || MV $E,$Ectx
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| 99 | || MVC B0,ILC
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| 100 |
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| 101 | ROTL $A,5,$Arot
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| 102 | || AND $C,$B,$F
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| 103 | || ANDN $D,$B,$F0
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| 104 | || ADD $K,$E,$T ; T=E+K
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| 105 |
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| 106 | XOR $F0,$F,$F ; F_00_19(B,C,D)
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| 107 | || MV $D,$E ; E=D
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| 108 | || MV $C,$D ; D=C
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| 109 | || SWAP2 $TX1,$TX2
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| 110 | || LDNW *${INP}++,$TX1
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| 111 |
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| 112 | ADD $F,$T,$T ; T+=F_00_19(B,C,D)
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| 113 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 114 | || SWAP4 $TX2,$TX3 ; byte swap
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| 115 |
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| 116 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 117 | || MV $A,$B ; B=A
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| 118 |
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| 119 | ADD $TX3,$T,$A ; A=T+Xi
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| 120 | || STW $TX3,*${XPB}++
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| 121 | SPKERNEL
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| 122 | ;;==================================================
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| 123 | ROTL $A,5,$Arot ; BODY_14
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| 124 | || AND $C,$B,$F
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| 125 | || ANDN $D,$B,$F0
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| 126 | || ADD $K,$E,$T ; T=E+K
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| 127 |
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| 128 | XOR $F0,$F,$F ; F_00_19(B,C,D)
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| 129 | || MV $D,$E ; E=D
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| 130 | || MV $C,$D ; D=C
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| 131 | || SWAP2 $TX1,$TX2
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| 132 | || LDNW *${INP}++,$TX1
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| 133 |
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| 134 | ADD $F,$T,$T ; T+=F_00_19(B,C,D)
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| 135 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 136 | || SWAP4 $TX2,$TX2 ; byte swap
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| 137 | || LDW *${XPA}++,$X0 ; fetches from X ring buffer are
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| 138 | || LDW *${XPB}[4],$X2 ; 2 iterations ahead
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| 139 |
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| 140 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 141 | || MV $A,$B ; B=A
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| 142 | || LDW *${XPA}[7],$X8
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| 143 | || MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
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| 144 | || MV $TX2,$TX3
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| 145 |
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| 146 | ADD $TX2,$T,$A ; A=T+Xi
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| 147 | || STW $TX2,*${XPB}++
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| 148 | ;;==================================================
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| 149 | ROTL $A,5,$Arot ; BODY_15
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| 150 | || AND $C,$B,$F
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| 151 | || ANDN $D,$B,$F0
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| 152 | || ADD $K,$E,$T ; T=E+K
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| 153 |
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| 154 | XOR $F0,$F,$F ; F_00_19(B,C,D)
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| 155 | || MV $D,$E ; E=D
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| 156 | || MV $C,$D ; D=C
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| 157 | || SWAP2 $TX1,$TX2
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| 158 |
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| 159 | ADD $F,$T,$T ; T+=F_00_19(B,C,D)
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| 160 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 161 | || SWAP4 $TX2,$TX2 ; byte swap
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| 162 | || XOR $X0,$X2,$TX0 ; Xupdate XORs are 1 iteration ahead
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| 163 | || LDW *${XPA}++,$X0
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| 164 | || LDW *${XPB}[4],$X2
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| 165 |
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| 166 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 167 | || MV $A,$B ; B=A
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| 168 | || XOR $X8,$X13,$TX1
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| 169 | || LDW *${XPA}[7],$X8
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| 170 | || MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
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| 171 | || MV $TX2,$TX3
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| 172 |
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| 173 | ADD $TX2,$T,$A ; A=T+Xi
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| 174 | || STW $TX2,*${XPB}++
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| 175 | || XOR $TX0,$TX1,$TX1
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| 176 | || MVK 3,B0
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| 177 | ;;==================================================
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| 178 | SPLOOPD 5 ; BODY_16_19
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| 179 | || MVC B0,ILC
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| 180 |
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| 181 | ROTL $A,5,$Arot
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| 182 | || AND $C,$B,$F
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| 183 | || ANDN $D,$B,$F0
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| 184 | || ADD $K,$E,$T ; T=E+K
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| 185 | || ROTL $TX1,1,$TX2 ; Xupdate output
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| 186 |
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| 187 | XOR $F0,$F,$F ; F_00_19(B,C,D)
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| 188 | || MV $D,$E ; E=D
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| 189 | || MV $C,$D ; D=C
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| 190 |
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| 191 | ADD $F,$T,$T ; T+=F_00_19(B,C,D)
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| 192 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 193 | || XOR $X0,$X2,$TX0
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| 194 | || LDW *${XPA}++,$X0
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| 195 | || LDW *${XPB}[4],$X2
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| 196 |
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| 197 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 198 | || MV $A,$B ; B=A
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| 199 | || XOR $X8,$X13,$TX1
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| 200 | || LDW *${XPA}[7],$X8
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| 201 | || MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
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| 202 | || MV $TX2,$TX3
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| 203 |
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| 204 | ADD $TX2,$T,$A ; A=T+Xi
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| 205 | || STW $TX2,*${XPB}++
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| 206 | || XOR $TX0,$TX1,$TX1
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| 207 | SPKERNEL
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| 208 |
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| 209 | MVK 0xffffeba1,$K
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| 210 | || MVK 19,B0
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| 211 | MVKH 0x6ed90000,$K ; K_20_39
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| 212 | ___
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| 213 | sub BODY_20_39 {
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| 214 | $code.=<<___;
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| 215 | ;;==================================================
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| 216 | SPLOOPD 5 ; BODY_20_39
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| 217 | || MVC B0,ILC
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| 218 |
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| 219 | ROTL $A,5,$Arot
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| 220 | || XOR $B,$C,$F
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| 221 | || ADD $K,$E,$T ; T=E+K
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| 222 | || ROTL $TX1,1,$TX2 ; Xupdate output
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| 223 |
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| 224 | XOR $D,$F,$F ; F_20_39(B,C,D)
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| 225 | || MV $D,$E ; E=D
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| 226 | || MV $C,$D ; D=C
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| 227 |
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| 228 | ADD $F,$T,$T ; T+=F_20_39(B,C,D)
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| 229 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 230 | || XOR $X0,$X2,$TX0
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| 231 | || LDW *${XPA}++,$X0
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| 232 | || LDW *${XPB}[4],$X2
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| 233 |
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| 234 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 235 | || MV $A,$B ; B=A
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| 236 | || XOR $X8,$X13,$TX1
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| 237 | || LDW *${XPA}[7],$X8
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| 238 | || MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
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| 239 | || MV $TX2,$TX3
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| 240 |
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| 241 | ADD $TX2,$T,$A ; A=T+Xi
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| 242 | || STW $TX2,*${XPB}++ ; last one is redundant
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| 243 | || XOR $TX0,$TX1,$TX1
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| 244 | SPKERNEL
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| 245 | ___
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| 246 | $code.=<<___ if (!shift);
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| 247 | MVK 0xffffbcdc,$K
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| 248 | MVKH 0x8f1b0000,$K ; K_40_59
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| 249 | ___
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| 250 | } &BODY_20_39();
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| 251 | $code.=<<___;
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| 252 | ;;==================================================
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| 253 | SPLOOPD 5 ; BODY_40_59
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| 254 | || MVC B0,ILC
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| 255 | || AND $B,$C,$F
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| 256 | || AND $B,$D,$F0
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| 257 |
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| 258 | ROTL $A,5,$Arot
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| 259 | || XOR $F0,$F,$F
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| 260 | || AND $C,$D,$F0
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| 261 | || ADD $K,$E,$T ; T=E+K
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| 262 | || ROTL $TX1,1,$TX2 ; Xupdate output
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| 263 |
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| 264 | XOR $F0,$F,$F ; F_40_59(B,C,D)
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| 265 | || MV $D,$E ; E=D
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| 266 | || MV $C,$D ; D=C
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| 267 |
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| 268 | ADD $F,$T,$T ; T+=F_40_59(B,C,D)
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| 269 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 270 | || XOR $X0,$X2,$TX0
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| 271 | || LDW *${XPA}++,$X0
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| 272 | || LDW *${XPB}[4],$X2
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| 273 |
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| 274 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 275 | || MV $A,$B ; B=A
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| 276 | || XOR $X8,$X13,$TX1
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| 277 | || LDW *${XPA}[7],$X8
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| 278 | || MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
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| 279 | || MV $TX2,$TX3
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| 280 |
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| 281 | ADD $TX2,$T,$A ; A=T+Xi
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| 282 | || STW $TX2,*${XPB}++
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| 283 | || XOR $TX0,$TX1,$TX1
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| 284 | || AND $B,$C,$F
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| 285 | || AND $B,$D,$F0
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| 286 | SPKERNEL
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| 287 |
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| 288 | MVK 0xffffc1d6,$K
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| 289 | || MVK 18,B0
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| 290 | MVKH 0xca620000,$K ; K_60_79
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| 291 | ___
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| 292 | &BODY_20_39(-1); # BODY_60_78
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| 293 | $code.=<<___;
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| 294 | ;;==================================================
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| 295 | [A0] B loop?
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| 296 | || ROTL $A,5,$Arot ; BODY_79
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| 297 | || XOR $B,$C,$F
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| 298 | || ROTL $TX1,1,$TX2 ; Xupdate output
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| 299 |
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| 300 | [A0] LDNW *${INP}++,$TX1 ; pre-fetch input
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| 301 | || ADD $K,$E,$T ; T=E+K
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| 302 | || XOR $D,$F,$F ; F_20_39(B,C,D)
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| 303 |
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| 304 | ADD $F,$T,$T ; T+=F_20_39(B,C,D)
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| 305 | || ADD $Ectx,$D,$E ; E=D,E+=Ectx
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| 306 | || ADD $Dctx,$C,$D ; D=C,D+=Dctx
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| 307 | || ROTL $B,30,$C ; C=ROL(B,30)
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| 308 |
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| 309 | ADD $Arot,$T,$T ; T+=ROL(A,5)
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| 310 | || ADD $Bctx,$A,$B ; B=A,B+=Bctx
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| 311 |
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| 312 | ADD $TX2,$T,$A ; A=T+Xi
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| 313 |
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| 314 | ADD $Actx,$A,$A ; A+=Actx
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| 315 | || ADD $Cctx,$C,$C ; C+=Cctx
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| 316 | ;; end of loop?
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| 317 |
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| 318 | BNOP RA ; return
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| 319 | || MV FP,SP ; restore stack pointer
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| 320 | || LDW *FP[0],FP ; restore frame pointer
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| 321 | STW $A,*${CTX}[0] ; emit A-E...
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| 322 | || MVK 0,B0
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| 323 | STW $B,*${CTX}[1]
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| 324 | || MVC B0,AMR ; clear AMR
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| 325 | STW $C,*${CTX}[2]
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| 326 | STW $D,*${CTX}[3]
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| 327 | STW $E,*${CTX}[4]
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| 328 | .endasmfunc
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| 329 |
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| 330 | .sect .const
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| 331 | .cstring "SHA1 block transform for C64x+, CRYPTOGAMS by <appro\@openssl.org>"
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| 332 | .align 4
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| 333 | ___
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| 334 |
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| 335 | print $code;
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| 336 | close STDOUT or die "error closing STDOUT: $!";
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