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ghash-x86_64.pl: "528B" variant delivers further >30% improvement.
This commit is contained in:
Andy Polyakov
parent
04e2b793d6
commit
d364506a24
@ -7,18 +7,26 @@
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# details see http://www.openssl.org/~appro/cryptogams/.
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# ====================================================================
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#
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# March 2010
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# March, June 2010
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#
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# The module implements "4-bit" GCM GHASH function and underlying
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# single multiplication operation in GF(2^128). "4-bit" means that it
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# uses 256 bytes per-key table [+128 bytes shared table]. Performance
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# results are for streamed GHASH subroutine and are expressed in
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# cycles per processed byte, less is better:
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# single multiplication operation in GF(2^128). "4-bit" means that
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# it uses 256 bytes per-key table [+128 bytes shared table]. GHASH
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# function features so called "528B" variant utilizing additional
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# 256+16 bytes of per-key storage [+512 bytes shared table].
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# Performance results are for this streamed GHASH subroutine and are
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# expressed in cycles per processed byte, less is better:
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#
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# gcc 3.4.x assembler
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# gcc 3.4.x(*) assembler
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#
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# Opteron 18.5 10.2 +80%
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# Core2 17.5 11.0 +59%
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# P4 28.6 14.0 +100%
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# Opteron 18.5 7.7 +140%
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# Core2 17.5 8.1(**) +115%
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#
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# (*) comparison is not completely fair, because C results are
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# for vanilla "256B" implementation, not "528B";-)
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# (**) it's mystery [to me] why Core2 result is not same as for
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# Opteron;
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# May 2010
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#
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@ -58,9 +66,17 @@ $Htbl="%rsi";
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$cnt="%rcx";
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$rem="%rdx";
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sub lo() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/;
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$r =~ s/%[er]([sd]i)/%\1l/;
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sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/ or
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$r =~ s/%[er]([sd]i)/%\1l/ or
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$r =~ s/%[er](bp)/%\1l/ or
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$r =~ s/%(r[0-9]+)[d]?/%\1b/; $r; }
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sub AUTOLOAD() # thunk [simplified] 32-bit style perlasm
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{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
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my $arg = pop;
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$arg = "\$$arg" if ($arg*1 eq $arg);
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$code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
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}
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{ my $N;
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sub loop() {
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@ -70,13 +86,13 @@ sub lo() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/;
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$code.=<<___;
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xor $nlo,$nlo
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xor $nhi,$nhi
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mov `&lo("$Zlo")`,`&lo("$nlo")`
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mov `&lo("$Zlo")`,`&lo("$nhi")`
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shl \$4,`&lo("$nlo")`
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mov `&LB("$Zlo")`,`&LB("$nlo")`
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mov `&LB("$Zlo")`,`&LB("$nhi")`
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shl \$4,`&LB("$nlo")`
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mov \$14,$cnt
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mov 8($Htbl,$nlo),$Zlo
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mov ($Htbl,$nlo),$Zhi
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and \$0xf0,`&lo("$nhi")`
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and \$0xf0,`&LB("$nhi")`
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mov $Zlo,$rem
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jmp .Loop$N
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@ -85,15 +101,15 @@ $code.=<<___;
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shr \$4,$Zlo
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and \$0xf,$rem
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mov $Zhi,$tmp
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mov ($inp,$cnt),`&lo("$nlo")`
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mov ($inp,$cnt),`&LB("$nlo")`
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shr \$4,$Zhi
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xor 8($Htbl,$nhi),$Zlo
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shl \$60,$tmp
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xor ($Htbl,$nhi),$Zhi
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mov `&lo("$nlo")`,`&lo("$nhi")`
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mov `&LB("$nlo")`,`&LB("$nhi")`
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xor ($rem_4bit,$rem,8),$Zhi
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mov $Zlo,$rem
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shl \$4,`&lo("$nlo")`
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shl \$4,`&LB("$nlo")`
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xor $tmp,$Zlo
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dec $cnt
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js .Lbreak$N
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@ -105,7 +121,7 @@ $code.=<<___;
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xor 8($Htbl,$nlo),$Zlo
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shl \$60,$tmp
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xor ($Htbl,$nlo),$Zhi
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and \$0xf0,`&lo("$nhi")`
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and \$0xf0,`&LB("$nhi")`
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xor ($rem_4bit,$rem,8),$Zhi
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mov $Zlo,$rem
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xor $tmp,$Zlo
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@ -120,7 +136,7 @@ $code.=<<___;
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xor 8($Htbl,$nlo),$Zlo
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shl \$60,$tmp
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xor ($Htbl,$nlo),$Zhi
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and \$0xf0,`&lo("$nhi")`
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and \$0xf0,`&LB("$nhi")`
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xor ($rem_4bit,$rem,8),$Zhi
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mov $Zlo,$rem
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xor $tmp,$Zlo
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@ -170,9 +186,7 @@ ___
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# per-function register layout
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$inp="%rdx";
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$len="%rcx";
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$cnt="%rbp";
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$rem="%r12";
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$rem_8bit=$rem_4bit;
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$code.=<<___;
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.globl gcm_ghash_4bit
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@ -182,33 +196,145 @@ gcm_ghash_4bit:
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push %rbx
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push %rbp
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push %r12
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push %r13
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push %r14
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push %r15
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sub \$280,%rsp
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.Lghash_prologue:
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mov 8($Xi),$Zlo
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mov ($Xi),$Zhi
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add $inp,$len
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lea .Lrem_4bit(%rip),$rem_4bit
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.align 4
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.Louter_loop:
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xor 8($inp),$Zlo
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xor ($inp),$Zhi
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lea 16($inp),$inp
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mov $Zlo,8($Xi)
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mov $Zhi,($Xi)
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shr \$56,$Zlo
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mov $inp,%r14 # reassign couple of args
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mov $len,%r15
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___
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&loop ($Xi);
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$code.=<<___;
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cmp $len,$inp
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jb .Louter_loop
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{ my $inp="%r14";
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my $dat="%edx";
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my $len="%r15";
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my @nhi=("%ebx","%ecx");
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my @rem=("%r12","%r13");
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my $Hshr4="%rbp";
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&sub ($Htbl,-128); # size optimization
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&lea ($Hshr4,"16+128(%rsp)");
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{ my @lo =($nlo,$nhi);
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my @hi =($Zlo,$Zhi);
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&xor ($dat,$dat);
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for ($i=0,$j=-2;$i<18;$i++,$j++) {
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&mov ("$j(%rsp)",&LB($dat)) if ($i>1);
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&or ($lo[0],$tmp) if ($i>1);
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&mov (&LB($dat),&LB($lo[1])) if ($i>0 && $i<17);
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&shr ($lo[1],4) if ($i>0 && $i<17);
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&mov ($tmp,$hi[1]) if ($i>0 && $i<17);
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&shr ($hi[1],4) if ($i>0 && $i<17);
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&mov ("8*$j($Hshr4)",$hi[0]) if ($i>1);
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&mov ($hi[0],"16*$i+0-128($Htbl)") if ($i<16);
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&shl (&LB($dat),4) if ($i>0 && $i<17);
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&mov ("8*$j-128($Hshr4)",$lo[0]) if ($i>1);
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&mov ($lo[0],"16*$i+8-128($Htbl)") if ($i<16);
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&shl ($tmp,60) if ($i>0 && $i<17);
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push (@lo,shift(@lo));
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push (@hi,shift(@hi));
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}
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}
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&add ($Htbl,-128);
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&mov ($Zlo,"8($Xi)");
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&mov ($Zhi,"0($Xi)");
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&add ($len,$inp); # pointer to the end of data
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&lea ($rem_8bit,".Lrem_8bit(%rip)");
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&jmp (".Louter_loop");
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$code.=".align 16\n.Louter_loop:\n";
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&xor ($Zhi,"($inp)");
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&mov ("%rdx","8($inp)");
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&lea ($inp,"16($inp)");
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&xor ("%rdx",$Zlo);
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&mov ("($Xi)",$Zhi);
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&mov ("8($Xi)","%rdx");
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&shr ("%rdx",32);
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&xor ($nlo,$nlo);
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&rol ($dat,8);
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&mov (&LB($nlo),&LB($dat));
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&movz ($nhi[0],&LB($dat));
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&shl (&LB($nlo),4);
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&shr ($nhi[0],4);
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for ($j=11,$i=0;$i<15;$i++) {
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&rol ($dat,8);
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&xor ($Zlo,"8($Htbl,$nlo)") if ($i>0);
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&xor ($Zhi,"($Htbl,$nlo)") if ($i>0);
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&mov ($Zlo,"8($Htbl,$nlo)") if ($i==0);
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&mov ($Zhi,"($Htbl,$nlo)") if ($i==0);
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&mov (&LB($nlo),&LB($dat));
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&xor ($Zlo,$tmp) if ($i>0);
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&movzw ($rem[1],"($rem_8bit,$rem[1],2)") if ($i>0);
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&movz ($nhi[1],&LB($dat));
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&shl (&LB($nlo),4);
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&movzb ($rem[0],"(%rsp,$nhi[0])");
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&shr ($nhi[1],4) if ($i<14);
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&and ($nhi[1],0xf0) if ($i==14);
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&shl ($rem[1],48) if ($i>0);
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&xor ($rem[0],$Zlo);
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&mov ($tmp,$Zhi);
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&xor ($Zhi,$rem[1]) if ($i>0);
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&shr ($Zlo,8);
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&movz ($rem[0],&LB($rem[0]));
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&mov ($dat,"$j($Xi)") if (--$j%4==0);
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&shr ($Zhi,8);
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&xor ($Zlo,"-128($Hshr4,$nhi[0],8)");
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&shl ($tmp,56);
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&xor ($Zhi,"($Hshr4,$nhi[0],8)");
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unshift (@nhi,pop(@nhi)); # "rotate" registers
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unshift (@rem,pop(@rem));
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}
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&movzw ($rem[1],"($rem_8bit,$rem[1],2)");
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&xor ($Zlo,"8($Htbl,$nlo)");
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&xor ($Zhi,"($Htbl,$nlo)");
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&shl ($rem[1],48);
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&xor ($Zlo,$tmp);
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&xor ($Zhi,$rem[1]);
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&movz ($rem[0],&LB($Zlo));
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&shr ($Zlo,4);
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&mov ($tmp,$Zhi);
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&shl (&LB($rem[0]),4);
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&shr ($Zhi,4);
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&xor ($Zlo,"8($Htbl,$nhi[0])");
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&movzw ($rem[0],"($rem_8bit,$rem[0],2)");
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&shl ($tmp,60);
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&xor ($Zhi,"($Htbl,$nhi[0])");
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&xor ($Zlo,$tmp);
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&shl ($rem[0],48);
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&bswap ($Zlo);
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&xor ($Zhi,$rem[0]);
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&bswap ($Zhi);
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&cmp ($inp,$len);
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&jb (".Louter_loop");
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}
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$code.=<<___;
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mov $Zlo,8($Xi)
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mov $Zhi,($Xi)
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mov 0(%rsp),%r12
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mov 8(%rsp),%rbp
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mov 16(%rsp),%rbx
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lea 24(%rsp),%rsp
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lea 280(%rsp),%rsi
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mov 0(%rsi),%r15
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mov 8(%rsi),%r14
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mov 16(%rsi),%r13
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mov 24(%rsi),%r12
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mov 32(%rsi),%rbp
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mov 40(%rsi),%rbx
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lea 48(%rsi),%rsp
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.Lghash_epilogue:
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ret
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.size gcm_ghash_4bit,.-gcm_ghash_4bit
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@ -506,6 +632,41 @@ $code.=<<___;
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.long 0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
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.long 0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
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.long 0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
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.type .Lrem_8bit,\@object
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.Lrem_8bit:
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.value 0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
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.value 0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
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.value 0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
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.value 0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
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.value 0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
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.value 0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
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.value 0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
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.value 0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
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.value 0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
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.value 0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
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.value 0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
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.value 0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
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.value 0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
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.value 0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
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.value 0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
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.value 0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
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.value 0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
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.value 0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
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.value 0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
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.value 0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
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.value 0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
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.value 0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
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.value 0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
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.value 0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
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.value 0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
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.value 0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
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.value 0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
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.value 0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
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.value 0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
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.value 0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
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.value 0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
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.value 0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
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.asciz "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
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.align 64
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___
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