# 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 19.3 7.7 +150%
+# Core2 17.8 8.1(**) +120%
+#
+# (*) comparison is not completely fair, because C results are
+# for vanilla "256B" implementation, while assembler results
+# are for "528B";-)
+# (**) it's mystery [to me] why Core2 result is not same as for
+# Opteron;
# May 2010
#
-# Add PCLMULQDQ version performing at 2.07 cycles per processed byte.
+# Add PCLMULQDQ version performing at 2.02 cycles per processed byte.
# See ghash-x86.pl for background information and details about coding
# techniques.
+#
+# Special thanks to David Woodhouse <dwmw2@infradead.org> for
+# providing access to a Westmere-based system on behalf of Intel
+# Open Source Technology Centre.
$flavour = shift;
$output = shift;
$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";
+}
\f
{ my $N;
sub loop() {
$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$N
shr \$4,$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
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
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
# per-function register layout
$inp="%rdx";
$len="%rcx";
-
-$cnt="%rbp";
-$rem="%r12";
+$rem_8bit=$rem_4bit;
$code.=<<___;
.globl gcm_ghash_4bit
push %rbx
push %rbp
push %r12
+ push %r13
+ push %r14
+ push %r15
+ sub \$280,%rsp
.Lghash_prologue:
-
- mov 8($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
.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
___
projects / openssl.git / blobdiff