315 lines
6.6 KiB
Perl
315 lines
6.6 KiB
Perl
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#!/usr/bin/env perl
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# ====================================================================
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# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
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# project. The module is, however, dual licensed under OpenSSL and
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# CRYPTOGAMS licenses depending on where you obtain it. For further
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# details see http://www.openssl.org/~appro/cryptogams/.
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# ====================================================================
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# RC4 for PA-RISC.
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# June 2009.
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#
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# Performance is 33% better than gcc 3.2 generated code on PA-7100LC.
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# For reference, [4x] unrolled loop is >40% faster than folded one.
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# It's possible to unroll loop 8 times on PA-RISC 2.0, but improvement
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# is believed to be not sufficient to justify the effort...
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#
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# Special thanks to polarhome.com for providing HP-UX account.
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
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$flavour = shift;
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$output = shift;
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open STDOUT,">$output";
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if ($flavour =~ /64/) {
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$LEVEL ="2.0W";
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$SIZE_T =8;
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$FRAME_MARKER =80;
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$SAVED_RP =16;
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$PUSH ="std";
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$PUSHMA ="std,ma";
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$POP ="ldd";
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$POPMB ="ldd,mb";
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} else {
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$LEVEL ="1.0";
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$SIZE_T =4;
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$FRAME_MARKER =48;
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$SAVED_RP =20;
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$PUSH ="stw";
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$PUSHMA ="stwm";
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$POP ="ldw";
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$POPMB ="ldwm";
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}
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$FRAME=4*$SIZE_T+$FRAME_MARKER; # 4 saved regs + frame marker
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# [+ argument transfer]
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$SZ=1; # defaults to RC4_CHAR
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if (open CONF,"<${dir}../../opensslconf.h") {
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while(<CONF>) {
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if (m/#\s*define\s+RC4_INT\s+(.*)/) {
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$SZ = ($1=~/char$/) ? 1 : 4;
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last;
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}
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}
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close CONF;
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}
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if ($SZ==1) { # RC4_CHAR
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$LD="ldb";
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$LDX="ldbx";
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$MKX="addl";
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$ST="stb";
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} else { # RC4_INT (~5% faster than RC4_CHAR on PA-7100LC)
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$LD="ldw";
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$LDX="ldwx,s";
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$MKX="sh2addl";
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$ST="stw";
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}
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$key="%r26";
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$len="%r25";
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$inp="%r24";
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$out="%r23";
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@XX=("%r19","%r20");
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@TX=("%r21","%r22");
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$YY="%r28";
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$TY="%r29";
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$acc="%r1";
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$ix="%r2";
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$iy="%r3";
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$dat0="%r4";
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$dat1="%r5";
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$rem="%r6";
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$mask="%r31";
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sub unrolledloopbody {
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for ($i=0;$i<4;$i++) {
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$code.=<<___;
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ldo 1($XX[0]),$XX[1]
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`sprintf("$LDX %$TY(%$key),%$dat1") if ($i>0)`
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and $mask,$XX[1],$XX[1]
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$LDX $YY($key),$TY
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$MKX $YY,$key,$ix
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$LDX $XX[1]($key),$TX[1]
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$MKX $XX[0],$key,$iy
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$ST $TX[0],0($ix)
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comclr,<> $XX[1],$YY,%r0 ; conditional
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copy $TX[0],$TX[1] ; move
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`sprintf("%sdep %$dat1,%d,8,%$acc",$i==1?"z":"",8*($i-1)+7) if ($i>0)`
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$ST $TY,0($iy)
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addl $TX[0],$TY,$TY
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addl $TX[1],$YY,$YY
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and $mask,$TY,$TY
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and $mask,$YY,$YY
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___
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push(@TX,shift(@TX)); push(@XX,shift(@XX)); # "rotate" registers
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} }
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sub foldedloop {
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my ($label,$count)=@_;
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$code.=<<___;
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$label
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$MKX $YY,$key,$iy
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$LDX $YY($key),$TY
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$MKX $XX[0],$key,$ix
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$ST $TX[0],0($iy)
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ldo 1($XX[0]),$XX[0]
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$ST $TY,0($ix)
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addl $TX[0],$TY,$TY
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ldbx $inp($out),$dat1
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and $mask,$TY,$TY
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and $mask,$XX[0],$XX[0]
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$LDX $TY($key),$acc
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$LDX $XX[0]($key),$TX[0]
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ldo 1($out),$out
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xor $dat1,$acc,$acc
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addl $TX[0],$YY,$YY
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stb $acc,-1($out)
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addib,<> -1,$count,$label ; $count is always small
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and $mask,$YY,$YY
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___
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}
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$code=<<___;
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.LEVEL $LEVEL
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.SPACE \$TEXT\$
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.SUBSPA \$CODE\$,QUAD=0,ALIGN=8,ACCESS=0x2C,CODE_ONLY
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.EXPORT RC4,ENTRY,ARGW0=GR,ARGW1=GR,ARGW2=GR,ARGW3=GR
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RC4
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.PROC
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.CALLINFO FRAME=`$FRAME-4*$SIZE_T`,NO_CALLS,SAVE_RP,ENTRY_GR=6
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.ENTRY
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$PUSH %r2,-$SAVED_RP(%sp) ; standard prologue
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$PUSHMA %r3,$FRAME(%sp)
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$PUSH %r4,`-$FRAME+1*$SIZE_T`(%sp)
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$PUSH %r5,`-$FRAME+2*$SIZE_T`(%sp)
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$PUSH %r6,`-$FRAME+3*$SIZE_T`(%sp)
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cmpib,*= 0,$len,L\$abort
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sub $inp,$out,$inp ; distance between $inp and $out
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$LD `0*$SZ`($key),$XX[0]
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$LD `1*$SZ`($key),$YY
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ldo `2*$SZ`($key),$key
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ldi 0xff,$mask
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ldi 3,$dat0
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ldo 1($XX[0]),$XX[0] ; warm up loop
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and $mask,$XX[0],$XX[0]
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$LDX $XX[0]($key),$TX[0]
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addl $TX[0],$YY,$YY
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cmpib,*>>= 6,$len,L\$oop1 ; is $len large enough to bother?
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and $mask,$YY,$YY
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and,<> $out,$dat0,$rem ; is $out aligned?
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b L\$alignedout
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subi 4,$rem,$rem
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sub $len,$rem,$len
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___
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&foldedloop("L\$alignout",$rem); # process till $out is aligned
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$code.=<<___;
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L\$alignedout ; $len is at least 4 here
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and,<> $inp,$dat0,$acc ; is $inp aligned?
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b L\$oop4
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sub $inp,$acc,$rem ; align $inp
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sh3addl $acc,%r0,$acc
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subi 32,$acc,$acc
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mtctl $acc,%cr11 ; load %sar with vshd align factor
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ldwx $rem($out),$dat0
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ldo 4($rem),$rem
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L\$oop4misalignedinp
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___
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&unrolledloopbody();
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$code.=<<___;
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$LDX $TY($key),$ix
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ldwx $rem($out),$dat1
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ldo -4($len),$len
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or $ix,$acc,$acc ; last piece, no need to dep
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vshd $dat0,$dat1,$iy ; align data
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copy $dat1,$dat0
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xor $iy,$acc,$acc
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stw $acc,0($out)
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cmpib,*<< 3,$len,L\$oop4misalignedinp
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ldo 4($out),$out
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cmpib,*= 0,$len,L\$done
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nop
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b L\$oop1
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nop
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.ALIGN 8
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L\$oop4
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___
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&unrolledloopbody();
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$code.=<<___;
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$LDX $TY($key),$ix
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ldwx $inp($out),$dat0
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ldo -4($len),$len
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or $ix,$acc,$acc ; last piece, no need to dep
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xor $dat0,$acc,$acc
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stw $acc,0($out)
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cmpib,*<< 3,$len,L\$oop4
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ldo 4($out),$out
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cmpib,*= 0,$len,L\$done
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nop
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___
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&foldedloop("L\$oop1",$len);
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$code.=<<___;
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L\$done
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$POP `-$FRAME-$SAVED_RP`(%sp),%r2
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ldo -1($XX[0]),$XX[0] ; chill out loop
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sub $YY,$TX[0],$YY
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and $mask,$XX[0],$XX[0]
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and $mask,$YY,$YY
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$ST $XX[0],`-2*$SZ`($key)
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$ST $YY,`-1*$SZ`($key)
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$POP `-$FRAME+1*$SIZE_T`(%sp),%r4
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$POP `-$FRAME+2*$SIZE_T`(%sp),%r5
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$POP `-$FRAME+3*$SIZE_T`(%sp),%r6
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L\$abort
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bv (%r2)
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.EXIT
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$POPMB -$FRAME(%sp),%r3
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.PROCEND
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___
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$code.=<<___;
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.EXPORT private_RC4_set_key,ENTRY,ARGW0=GR,ARGW1=GR,ARGW2=GR
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.ALIGN 8
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private_RC4_set_key
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.PROC
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.CALLINFO NO_CALLS
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.ENTRY
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$ST %r0,`0*$SZ`($key)
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$ST %r0,`1*$SZ`($key)
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ldo `2*$SZ`($key),$key
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copy %r0,@XX[0]
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L\$1st
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$ST @XX[0],0($key)
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ldo 1(@XX[0]),@XX[0]
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bb,>= @XX[0],`31-8`,L\$1st ; @XX[0]<256
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ldo $SZ($key),$key
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ldo `-256*$SZ`($key),$key ; rewind $key
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addl $len,$inp,$inp ; $inp to point at the end
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sub %r0,$len,%r23 ; inverse index
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copy %r0,@XX[0]
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copy %r0,@XX[1]
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ldi 0xff,$mask
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L\$2nd
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$LDX @XX[0]($key),@TX[0]
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ldbx %r23($inp),@TX[1]
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addi,nuv 1,%r23,%r23 ; increment and conditional
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sub %r0,$len,%r23 ; inverse index
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addl @TX[0],@XX[1],@XX[1]
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addl @TX[1],@XX[1],@XX[1]
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and $mask,@XX[1],@XX[1]
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$MKX @XX[0],$key,$TY
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$LDX @XX[1]($key),@TX[1]
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$MKX @XX[1],$key,$YY
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ldo 1(@XX[0]),@XX[0]
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$ST @TX[0],0($YY)
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bb,>= @XX[0],`31-8`,L\$2nd ; @XX[0]<256
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$ST @TX[1],0($TY)
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bv,n (%r2)
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.EXIT
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nop
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.PROCEND
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.EXPORT RC4_options,ENTRY
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.ALIGN 8
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RC4_options
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.PROC
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.CALLINFO NO_CALLS
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.ENTRY
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blr %r0,%r28
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ldi 3,%r1
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L\$pic
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andcm %r28,%r1,%r28
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bv (%r2)
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.EXIT
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ldo L\$opts-L\$pic(%r28),%r28
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.PROCEND
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.ALIGN 8
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L\$opts
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.STRINGZ "rc4(4x,`$SZ==1?"char":"int"`)"
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.STRINGZ "RC4 for PA-RISC, CRYPTOGAMS by <appro\@openssl.org>"
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___
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$code =~ s/\`([^\`]*)\`/eval $1/gem;
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$code =~ s/cmpib,\*/comib,/gm if ($SIZE_T==4);
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$code =~ s/\bbv\b/bve/gm if ($SIZE_T==8);
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print $code;
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close STDOUT;
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