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openssl/crypto/sha/asm/sha1-c64xplus.pl
Richard Levitte 1aa89a7a3a Unify all assembler file generators 
They now generally conform to the following argument sequence:

    script.pl "$(PERLASM_SCHEME)" [ C preprocessor arguments ... ] \
              $(PROCESSOR) <output file>

However, in the spirit of being able to use these scripts manually,
they also allow for no argument, or for only the flavour, or for only
the output file.  This is done by only using the last argument as
output file if it's a file (it has an extension), and only using the
first argument as flavour if it isn't a file (it doesn't have an
extension).

While we're at it, we make all $xlate calls the same, i.e. the $output
argument is always quoted, and we always die on error when trying to
start $xlate.

There's a perl lesson in this, regarding operator priority...

This will always succeed, even when it fails:

    open FOO, "something" || die "ERR: $!";

The reason is that '||' has higher priority than list operators (a
function is essentially a list operator and gobbles up everything
following it that isn't lower priority), and since a non-empty string
is always true, so that ends up being exactly the same as:

    open FOO, "something";

This, however, will fail if "something" can't be opened:

    open FOO, "something" or die "ERR: $!";

The reason is that 'or' has lower priority that list operators,
i.e. it's performed after the 'open' call.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9884)
2019-09-16 16:29:57 +02:00

337 lines
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#! /usr/bin/env perl
# Copyright 2012-2016 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
#
# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see http://www.openssl.org/~appro/cryptogams/.
# ====================================================================
#
# SHA1 for C64x+.
#
# November 2011
#
# If compared to compiler-generated code with similar characteristics,
# i.e. compiled with OPENSSL_SMALL_FOOTPRINT and utilizing SPLOOPs,
# this implementation is 25% smaller and >2x faster. In absolute terms
# performance is (quite impressive) ~6.5 cycles per processed byte.
# Fully unrolled assembler would be ~5x larger and is likely to be
# ~15% faster. It would be free from references to intermediate ring
# buffer, but put more pressure on L1P [both because the code would be
# larger and won't be using SPLOOP buffer]. There are no plans to
# realize fully unrolled variant though...
#
# !!! Note that this module uses AMR, which means that all interrupt
# service routines are expected to preserve it and for own well-being
# zero it upon entry.
$output = pop and open STDOUT,">$output";
($CTX,$INP,$NUM) = ("A4","B4","A6"); # arguments
($A,$B,$C,$D,$E, $Arot,$F,$F0,$T,$K) = map("A$_",(16..20, 21..25));
($X0,$X2,$X8,$X13) = ("A26","B26","A27","B27");
($TX0,$TX1,$TX2,$TX3) = map("B$_",(28..31));
($XPA,$XPB) = ("A5","B5"); # X circular buffer
($Actx,$Bctx,$Cctx,$Dctx,$Ectx) = map("A$_",(3,6..9)); # zaps $NUM
$code=<<___;
.text
.if .ASSEMBLER_VERSION<7000000
.asg 0,__TI_EABI__
.endif
.if __TI_EABI__
.asg sha1_block_data_order,_sha1_block_data_order
.endif
.asg B3,RA
.asg A15,FP
.asg B15,SP
.if .BIG_ENDIAN
.asg MV,SWAP2
.asg MV,SWAP4
.endif
.global _sha1_block_data_order
_sha1_block_data_order:
.asmfunc stack_usage(64)
MV $NUM,A0 ; reassign $NUM
|| MVK -64,B0
[!A0] BNOP RA ; if ($NUM==0) return;
|| [A0] STW FP,*SP--[16] ; save frame pointer and alloca(64)
|| [A0] MV SP,FP
[A0] LDW *${CTX}[0],$A ; load A-E...
|| [A0] AND B0,SP,SP ; align stack at 64 bytes
[A0] LDW *${CTX}[1],$B
|| [A0] SUBAW SP,2,SP ; reserve two words above buffer
[A0] LDW *${CTX}[2],$C
|| [A0] MVK 0x00404,B0
[A0] LDW *${CTX}[3],$D
|| [A0] MVKH 0x50000,B0 ; 0x050404, 64 bytes for $XP[AB]
[A0] LDW *${CTX}[4],$E
|| [A0] MVC B0,AMR ; setup circular addressing
LDNW *${INP}++,$TX1 ; pre-fetch input
NOP 1
loop?:
MVK 0x00007999,$K
|| ADDAW SP,2,$XPA
|| SUB A0,1,A0
|| MVK 13,B0
MVKH 0x5a820000,$K ; K_00_19
|| ADDAW SP,2,$XPB
|| MV $A,$Actx
|| MV $B,$Bctx
;;==================================================
SPLOOPD 5 ; BODY_00_13
|| MV $C,$Cctx
|| MV $D,$Dctx
|| MV $E,$Ectx
|| MVC B0,ILC
ROTL $A,5,$Arot
|| AND $C,$B,$F
|| ANDN $D,$B,$F0
|| ADD $K,$E,$T ; T=E+K
XOR $F0,$F,$F ; F_00_19(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
|| SWAP2 $TX1,$TX2
|| LDNW *${INP}++,$TX1
ADD $F,$T,$T ; T+=F_00_19(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| SWAP4 $TX2,$TX3 ; byte swap
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
ADD $TX3,$T,$A ; A=T+Xi
|| STW $TX3,*${XPB}++
SPKERNEL
;;==================================================
ROTL $A,5,$Arot ; BODY_14
|| AND $C,$B,$F
|| ANDN $D,$B,$F0
|| ADD $K,$E,$T ; T=E+K
XOR $F0,$F,$F ; F_00_19(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
|| SWAP2 $TX1,$TX2
|| LDNW *${INP}++,$TX1
ADD $F,$T,$T ; T+=F_00_19(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| SWAP4 $TX2,$TX2 ; byte swap
|| LDW *${XPA}++,$X0 ; fetches from X ring buffer are
|| LDW *${XPB}[4],$X2 ; 2 iterations ahead
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
|| LDW *${XPA}[7],$X8
|| MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
|| MV $TX2,$TX3
ADD $TX2,$T,$A ; A=T+Xi
|| STW $TX2,*${XPB}++
;;==================================================
ROTL $A,5,$Arot ; BODY_15
|| AND $C,$B,$F
|| ANDN $D,$B,$F0
|| ADD $K,$E,$T ; T=E+K
XOR $F0,$F,$F ; F_00_19(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
|| SWAP2 $TX1,$TX2
ADD $F,$T,$T ; T+=F_00_19(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| SWAP4 $TX2,$TX2 ; byte swap
|| XOR $X0,$X2,$TX0 ; Xupdate XORs are 1 iteration ahead
|| LDW *${XPA}++,$X0
|| LDW *${XPB}[4],$X2
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
|| XOR $X8,$X13,$TX1
|| LDW *${XPA}[7],$X8
|| MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
|| MV $TX2,$TX3
ADD $TX2,$T,$A ; A=T+Xi
|| STW $TX2,*${XPB}++
|| XOR $TX0,$TX1,$TX1
|| MVK 3,B0
;;==================================================
SPLOOPD 5 ; BODY_16_19
|| MVC B0,ILC
ROTL $A,5,$Arot
|| AND $C,$B,$F
|| ANDN $D,$B,$F0
|| ADD $K,$E,$T ; T=E+K
|| ROTL $TX1,1,$TX2 ; Xupdate output
XOR $F0,$F,$F ; F_00_19(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
ADD $F,$T,$T ; T+=F_00_19(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| XOR $X0,$X2,$TX0
|| LDW *${XPA}++,$X0
|| LDW *${XPB}[4],$X2
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
|| XOR $X8,$X13,$TX1
|| LDW *${XPA}[7],$X8
|| MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
|| MV $TX2,$TX3
ADD $TX2,$T,$A ; A=T+Xi
|| STW $TX2,*${XPB}++
|| XOR $TX0,$TX1,$TX1
SPKERNEL
MVK 0xffffeba1,$K
|| MVK 19,B0
MVKH 0x6ed90000,$K ; K_20_39
___
sub BODY_20_39 {
$code.=<<___;
;;==================================================
SPLOOPD 5 ; BODY_20_39
|| MVC B0,ILC
ROTL $A,5,$Arot
|| XOR $B,$C,$F
|| ADD $K,$E,$T ; T=E+K
|| ROTL $TX1,1,$TX2 ; Xupdate output
XOR $D,$F,$F ; F_20_39(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
ADD $F,$T,$T ; T+=F_20_39(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| XOR $X0,$X2,$TX0
|| LDW *${XPA}++,$X0
|| LDW *${XPB}[4],$X2
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
|| XOR $X8,$X13,$TX1
|| LDW *${XPA}[7],$X8
|| MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
|| MV $TX2,$TX3
ADD $TX2,$T,$A ; A=T+Xi
|| STW $TX2,*${XPB}++ ; last one is redundant
|| XOR $TX0,$TX1,$TX1
SPKERNEL
___
$code.=<<___ if (!shift);
MVK 0xffffbcdc,$K
MVKH 0x8f1b0000,$K ; K_40_59
___
} &BODY_20_39();
$code.=<<___;
;;==================================================
SPLOOPD 5 ; BODY_40_59
|| MVC B0,ILC
|| AND $B,$C,$F
|| AND $B,$D,$F0
ROTL $A,5,$Arot
|| XOR $F0,$F,$F
|| AND $C,$D,$F0
|| ADD $K,$E,$T ; T=E+K
|| ROTL $TX1,1,$TX2 ; Xupdate output
XOR $F0,$F,$F ; F_40_59(B,C,D)
|| MV $D,$E ; E=D
|| MV $C,$D ; D=C
ADD $F,$T,$T ; T+=F_40_59(B,C,D)
|| ROTL $B,30,$C ; C=ROL(B,30)
|| XOR $X0,$X2,$TX0
|| LDW *${XPA}++,$X0
|| LDW *${XPB}[4],$X2
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| MV $A,$B ; B=A
|| XOR $X8,$X13,$TX1
|| LDW *${XPA}[7],$X8
|| MV $TX3,$X13 ; || LDW *${XPB}[15],$X13
|| MV $TX2,$TX3
ADD $TX2,$T,$A ; A=T+Xi
|| STW $TX2,*${XPB}++
|| XOR $TX0,$TX1,$TX1
|| AND $B,$C,$F
|| AND $B,$D,$F0
SPKERNEL
MVK 0xffffc1d6,$K
|| MVK 18,B0
MVKH 0xca620000,$K ; K_60_79
___
&BODY_20_39(-1); # BODY_60_78
$code.=<<___;
;;==================================================
[A0] B loop?
|| ROTL $A,5,$Arot ; BODY_79
|| XOR $B,$C,$F
|| ROTL $TX1,1,$TX2 ; Xupdate output
[A0] LDNW *${INP}++,$TX1 ; pre-fetch input
|| ADD $K,$E,$T ; T=E+K
|| XOR $D,$F,$F ; F_20_39(B,C,D)
ADD $F,$T,$T ; T+=F_20_39(B,C,D)
|| ADD $Ectx,$D,$E ; E=D,E+=Ectx
|| ADD $Dctx,$C,$D ; D=C,D+=Dctx
|| ROTL $B,30,$C ; C=ROL(B,30)
ADD $Arot,$T,$T ; T+=ROL(A,5)
|| ADD $Bctx,$A,$B ; B=A,B+=Bctx
ADD $TX2,$T,$A ; A=T+Xi
ADD $Actx,$A,$A ; A+=Actx
|| ADD $Cctx,$C,$C ; C+=Cctx
;; end of loop?
BNOP RA ; return
|| MV FP,SP ; restore stack pointer
|| LDW *FP[0],FP ; restore frame pointer
STW $A,*${CTX}[0] ; emit A-E...
|| MVK 0,B0
STW $B,*${CTX}[1]
|| MVC B0,AMR ; clear AMR
STW $C,*${CTX}[2]
STW $D,*${CTX}[3]
STW $E,*${CTX}[4]
.endasmfunc
.sect .const
.cstring "SHA1 block transform for C64x+, CRYPTOGAMS by <appro\@openssl.org>"
.align 4
___
print $code;
close STDOUT;
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