提交 d364506a 编写于 作者: A Andy Polyakov

ghash-x86_64.pl: "528B" variant delivers further >30% improvement.

上级 04e2b793
......@@ -7,18 +7,26 @@
# details see http://www.openssl.org/~appro/cryptogams/.
# ====================================================================
#
# March 2010
# March, June 2010
#
# The module implements "4-bit" GCM GHASH function and underlying
# single multiplication operation in GF(2^128). "4-bit" means that it
# uses 256 bytes per-key table [+128 bytes shared table]. Performance
# results are for streamed GHASH subroutine and are expressed in
# cycles per processed byte, less is better:
# single multiplication operation in GF(2^128). "4-bit" means that
# it uses 256 bytes per-key table [+128 bytes shared table]. GHASH
# function features so called "528B" variant utilizing additional
# 256+16 bytes of per-key storage [+512 bytes shared table].
# Performance results are for this streamed GHASH subroutine and are
# expressed in cycles per processed byte, less is better:
#
# gcc 3.4.x assembler
# gcc 3.4.x(*) assembler
#
# Opteron 18.5 10.2 +80%
# Core2 17.5 11.0 +59%
# P4 28.6 14.0 +100%
# Opteron 18.5 7.7 +140%
# Core2 17.5 8.1(**) +115%
#
# (*) comparison is not completely fair, because C results are
# for vanilla "256B" implementation, not "528B";-)
# (**) it's mystery [to me] why Core2 result is not same as for
# Opteron;
# May 2010
#
......@@ -58,9 +66,17 @@ $Htbl="%rsi";
$cnt="%rcx";
$rem="%rdx";
sub lo() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/;
$r =~ s/%[er]([sd]i)/%\1l/;
sub LB() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/ or
$r =~ s/%[er]([sd]i)/%\1l/ or
$r =~ s/%[er](bp)/%\1l/ or
$r =~ s/%(r[0-9]+)[d]?/%\1b/; $r; }
sub AUTOLOAD() # thunk [simplified] 32-bit style perlasm
{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://;
my $arg = pop;
$arg = "\$$arg" if ($arg*1 eq $arg);
$code .= "\t$opcode\t".join(',',$arg,reverse @_)."\n";
}
{ my $N;
sub loop() {
......@@ -70,13 +86,13 @@ sub lo() { my $r=shift; $r =~ s/%[er]([a-d])x/%\1l/;
$code.=<<___;
xor $nlo,$nlo
xor $nhi,$nhi
mov `&lo("$Zlo")`,`&lo("$nlo")`
mov `&lo("$Zlo")`,`&lo("$nhi")`
shl \$4,`&lo("$nlo")`
mov `&LB("$Zlo")`,`&LB("$nlo")`
mov `&LB("$Zlo")`,`&LB("$nhi")`
shl \$4,`&LB("$nlo")`
mov \$14,$cnt
mov 8($Htbl,$nlo),$Zlo
mov ($Htbl,$nlo),$Zhi
and \$0xf0,`&lo("$nhi")`
and \$0xf0,`&LB("$nhi")`
mov $Zlo,$rem
jmp .Loop$N
......@@ -85,15 +101,15 @@ $code.=<<___;
shr \$4,$Zlo
and \$0xf,$rem
mov $Zhi,$tmp
mov ($inp,$cnt),`&lo("$nlo")`
mov ($inp,$cnt),`&LB("$nlo")`
shr \$4,$Zhi
xor 8($Htbl,$nhi),$Zlo
shl \$60,$tmp
xor ($Htbl,$nhi),$Zhi
mov `&lo("$nlo")`,`&lo("$nhi")`
mov `&LB("$nlo")`,`&LB("$nhi")`
xor ($rem_4bit,$rem,8),$Zhi
mov $Zlo,$rem
shl \$4,`&lo("$nlo")`
shl \$4,`&LB("$nlo")`
xor $tmp,$Zlo
dec $cnt
js .Lbreak$N
......@@ -105,7 +121,7 @@ $code.=<<___;
xor 8($Htbl,$nlo),$Zlo
shl \$60,$tmp
xor ($Htbl,$nlo),$Zhi
and \$0xf0,`&lo("$nhi")`
and \$0xf0,`&LB("$nhi")`
xor ($rem_4bit,$rem,8),$Zhi
mov $Zlo,$rem
xor $tmp,$Zlo
......@@ -120,7 +136,7 @@ $code.=<<___;
xor 8($Htbl,$nlo),$Zlo
shl \$60,$tmp
xor ($Htbl,$nlo),$Zhi
and \$0xf0,`&lo("$nhi")`
and \$0xf0,`&LB("$nhi")`
xor ($rem_4bit,$rem,8),$Zhi
mov $Zlo,$rem
xor $tmp,$Zlo
......@@ -170,9 +186,7 @@ ___
# per-function register layout
$inp="%rdx";
$len="%rcx";
$cnt="%rbp";
$rem="%r12";
$rem_8bit=$rem_4bit;
$code.=<<___;
.globl gcm_ghash_4bit
......@@ -182,33 +196,145 @@ gcm_ghash_4bit:
push %rbx
push %rbp
push %r12
push %r13
push %r14
push %r15
sub \$280,%rsp
.Lghash_prologue:
mov 8($Xi),$Zlo
mov ($Xi),$Zhi
add $inp,$len
lea .Lrem_4bit(%rip),$rem_4bit
.align 4
.Louter_loop:
xor 8($inp),$Zlo
xor ($inp),$Zhi
lea 16($inp),$inp
mov $Zlo,8($Xi)
mov $Zhi,($Xi)
shr \$56,$Zlo
mov $inp,%r14 # reassign couple of args
mov $len,%r15
___
&loop ($Xi);
{ my $inp="%r14";
my $dat="%edx";
my $len="%r15";
my @nhi=("%ebx","%ecx");
my @rem=("%r12","%r13");
my $Hshr4="%rbp";
&sub ($Htbl,-128); # size optimization
&lea ($Hshr4,"16+128(%rsp)");
{ my @lo =($nlo,$nhi);
my @hi =($Zlo,$Zhi);
&xor ($dat,$dat);
for ($i=0,$j=-2;$i<18;$i++,$j++) {
&mov ("$j(%rsp)",&LB($dat)) if ($i>1);
&or ($lo[0],$tmp) if ($i>1);
&mov (&LB($dat),&LB($lo[1])) if ($i>0 && $i<17);
&shr ($lo[1],4) if ($i>0 && $i<17);
&mov ($tmp,$hi[1]) if ($i>0 && $i<17);
&shr ($hi[1],4) if ($i>0 && $i<17);
&mov ("8*$j($Hshr4)",$hi[0]) if ($i>1);
&mov ($hi[0],"16*$i+0-128($Htbl)") if ($i<16);
&shl (&LB($dat),4) if ($i>0 && $i<17);
&mov ("8*$j-128($Hshr4)",$lo[0]) if ($i>1);
&mov ($lo[0],"16*$i+8-128($Htbl)") if ($i<16);
&shl ($tmp,60) if ($i>0 && $i<17);
push (@lo,shift(@lo));
push (@hi,shift(@hi));
}
}
&add ($Htbl,-128);
&mov ($Zlo,"8($Xi)");
&mov ($Zhi,"0($Xi)");
&add ($len,$inp); # pointer to the end of data
&lea ($rem_8bit,".Lrem_8bit(%rip)");
&jmp (".Louter_loop");
$code.=".align 16\n.Louter_loop:\n";
&xor ($Zhi,"($inp)");
&mov ("%rdx","8($inp)");
&lea ($inp,"16($inp)");
&xor ("%rdx",$Zlo);
&mov ("($Xi)",$Zhi);
&mov ("8($Xi)","%rdx");
&shr ("%rdx",32);
&xor ($nlo,$nlo);
&rol ($dat,8);
&mov (&LB($nlo),&LB($dat));
&movz ($nhi[0],&LB($dat));
&shl (&LB($nlo),4);
&shr ($nhi[0],4);
for ($j=11,$i=0;$i<15;$i++) {
&rol ($dat,8);
&xor ($Zlo,"8($Htbl,$nlo)") if ($i>0);
&xor ($Zhi,"($Htbl,$nlo)") if ($i>0);
&mov ($Zlo,"8($Htbl,$nlo)") if ($i==0);
&mov ($Zhi,"($Htbl,$nlo)") if ($i==0);
&mov (&LB($nlo),&LB($dat));
&xor ($Zlo,$tmp) if ($i>0);
&movzw ($rem[1],"($rem_8bit,$rem[1],2)") if ($i>0);
&movz ($nhi[1],&LB($dat));
&shl (&LB($nlo),4);
&movzb ($rem[0],"(%rsp,$nhi[0])");
&shr ($nhi[1],4) if ($i<14);
&and ($nhi[1],0xf0) if ($i==14);
&shl ($rem[1],48) if ($i>0);
&xor ($rem[0],$Zlo);
&mov ($tmp,$Zhi);
&xor ($Zhi,$rem[1]) if ($i>0);
&shr ($Zlo,8);
&movz ($rem[0],&LB($rem[0]));
&mov ($dat,"$j($Xi)") if (--$j%4==0);
&shr ($Zhi,8);
&xor ($Zlo,"-128($Hshr4,$nhi[0],8)");
&shl ($tmp,56);
&xor ($Zhi,"($Hshr4,$nhi[0],8)");
unshift (@nhi,pop(@nhi)); # "rotate" registers
unshift (@rem,pop(@rem));
}
&movzw ($rem[1],"($rem_8bit,$rem[1],2)");
&xor ($Zlo,"8($Htbl,$nlo)");
&xor ($Zhi,"($Htbl,$nlo)");
&shl ($rem[1],48);
&xor ($Zlo,$tmp);
&xor ($Zhi,$rem[1]);
&movz ($rem[0],&LB($Zlo));
&shr ($Zlo,4);
&mov ($tmp,$Zhi);
&shl (&LB($rem[0]),4);
&shr ($Zhi,4);
&xor ($Zlo,"8($Htbl,$nhi[0])");
&movzw ($rem[0],"($rem_8bit,$rem[0],2)");
&shl ($tmp,60);
&xor ($Zhi,"($Htbl,$nhi[0])");
&xor ($Zlo,$tmp);
&shl ($rem[0],48);
&bswap ($Zlo);
&xor ($Zhi,$rem[0]);
&bswap ($Zhi);
&cmp ($inp,$len);
&jb (".Louter_loop");
}
$code.=<<___;
cmp $len,$inp
jb .Louter_loop
mov $Zlo,8($Xi)
mov $Zhi,($Xi)
mov 0(%rsp),%r12
mov 8(%rsp),%rbp
mov 16(%rsp),%rbx
lea 24(%rsp),%rsp
lea 280(%rsp),%rsi
mov 0(%rsi),%r15
mov 8(%rsi),%r14
mov 16(%rsi),%r13
mov 24(%rsi),%r12
mov 32(%rsi),%rbp
mov 40(%rsi),%rbx
lea 48(%rsi),%rsp
.Lghash_epilogue:
ret
.size gcm_ghash_4bit,.-gcm_ghash_4bit
......@@ -506,6 +632,41 @@ $code.=<<___;
.long 0,`0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`
.long 0,`0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`
.long 0,`0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`
.type .Lrem_8bit,\@object
.Lrem_8bit:
.value 0x0000,0x01C2,0x0384,0x0246,0x0708,0x06CA,0x048C,0x054E
.value 0x0E10,0x0FD2,0x0D94,0x0C56,0x0918,0x08DA,0x0A9C,0x0B5E
.value 0x1C20,0x1DE2,0x1FA4,0x1E66,0x1B28,0x1AEA,0x18AC,0x196E
.value 0x1230,0x13F2,0x11B4,0x1076,0x1538,0x14FA,0x16BC,0x177E
.value 0x3840,0x3982,0x3BC4,0x3A06,0x3F48,0x3E8A,0x3CCC,0x3D0E
.value 0x3650,0x3792,0x35D4,0x3416,0x3158,0x309A,0x32DC,0x331E
.value 0x2460,0x25A2,0x27E4,0x2626,0x2368,0x22AA,0x20EC,0x212E
.value 0x2A70,0x2BB2,0x29F4,0x2836,0x2D78,0x2CBA,0x2EFC,0x2F3E
.value 0x7080,0x7142,0x7304,0x72C6,0x7788,0x764A,0x740C,0x75CE
.value 0x7E90,0x7F52,0x7D14,0x7CD6,0x7998,0x785A,0x7A1C,0x7BDE
.value 0x6CA0,0x6D62,0x6F24,0x6EE6,0x6BA8,0x6A6A,0x682C,0x69EE
.value 0x62B0,0x6372,0x6134,0x60F6,0x65B8,0x647A,0x663C,0x67FE
.value 0x48C0,0x4902,0x4B44,0x4A86,0x4FC8,0x4E0A,0x4C4C,0x4D8E
.value 0x46D0,0x4712,0x4554,0x4496,0x41D8,0x401A,0x425C,0x439E
.value 0x54E0,0x5522,0x5764,0x56A6,0x53E8,0x522A,0x506C,0x51AE
.value 0x5AF0,0x5B32,0x5974,0x58B6,0x5DF8,0x5C3A,0x5E7C,0x5FBE
.value 0xE100,0xE0C2,0xE284,0xE346,0xE608,0xE7CA,0xE58C,0xE44E
.value 0xEF10,0xEED2,0xEC94,0xED56,0xE818,0xE9DA,0xEB9C,0xEA5E
.value 0xFD20,0xFCE2,0xFEA4,0xFF66,0xFA28,0xFBEA,0xF9AC,0xF86E
.value 0xF330,0xF2F2,0xF0B4,0xF176,0xF438,0xF5FA,0xF7BC,0xF67E
.value 0xD940,0xD882,0xDAC4,0xDB06,0xDE48,0xDF8A,0xDDCC,0xDC0E
.value 0xD750,0xD692,0xD4D4,0xD516,0xD058,0xD19A,0xD3DC,0xD21E
.value 0xC560,0xC4A2,0xC6E4,0xC726,0xC268,0xC3AA,0xC1EC,0xC02E
.value 0xCB70,0xCAB2,0xC8F4,0xC936,0xCC78,0xCDBA,0xCFFC,0xCE3E
.value 0x9180,0x9042,0x9204,0x93C6,0x9688,0x974A,0x950C,0x94CE
.value 0x9F90,0x9E52,0x9C14,0x9DD6,0x9898,0x995A,0x9B1C,0x9ADE
.value 0x8DA0,0x8C62,0x8E24,0x8FE6,0x8AA8,0x8B6A,0x892C,0x88EE
.value 0x83B0,0x8272,0x8034,0x81F6,0x84B8,0x857A,0x873C,0x86FE
.value 0xA9C0,0xA802,0xAA44,0xAB86,0xAEC8,0xAF0A,0xAD4C,0xAC8E
.value 0xA7D0,0xA612,0xA454,0xA596,0xA0D8,0xA11A,0xA35C,0xA29E
.value 0xB5E0,0xB422,0xB664,0xB7A6,0xB2E8,0xB32A,0xB16C,0xB0AE
.value 0xBBF0,0xBA32,0xB874,0xB9B6,0xBCF8,0xBD3A,0xBF7C,0xBEBE
.asciz "GHASH for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
.align 64
___
......
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