331 lines
7 KiB
Perl
331 lines
7 KiB
Perl
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#!/usr/bin/env perl
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# ====================================================================
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# Written by Andy Polyakov <appro@openssl.org> 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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# March 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 on UltraSPARC pre-Tx CPU
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# and are expressed in cycles per processed byte, less is better:
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#
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# gcc 3.3.x cc 5.2 this assembler
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#
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# 32-bit build 81.4 43.3 12.6 (+546%/+244%)
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# 64-bit build 20.2 21.2 12.6 (+60%/+68%)
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#
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# Here is data collected on UltraSPARC T1 system running Linux:
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#
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# gcc 4.4.1 this assembler
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#
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# 32-bit build 566 50 (+1000%)
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# 64-bit build 56 50 (+12%)
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#
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# I don't quite understand why difference between 32-bit and 64-bit
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# compiler-generated code is so big. Compilers *were* instructed to
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# generate code for UltraSPARC and should have used 64-bit registers
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# for Z vector (see C code) even in 32-bit build... Oh well, it only
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# means more impressive improvement coefficients for this assembler
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# module;-) Loops are aggressively modulo-scheduled in respect to
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# references to input data and Z.hi updates to achieve 12 cycles
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# timing. To anchor to something else, sha1-sparcv9.pl spends 11.6
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# cycles to process one byte on UltraSPARC pre-Tx CPU and ~24 on T1.
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$bits=32;
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for (@ARGV) { $bits=64 if (/\-m64/ || /\-xarch\=v9/); }
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if ($bits==64) { $bias=2047; $frame=192; }
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else { $bias=0; $frame=112; }
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$output=shift;
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open STDOUT,">$output";
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$Zhi="%o0"; # 64-bit values
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$Zlo="%o1";
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$Thi="%o2";
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$Tlo="%o3";
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$rem="%o4";
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$tmp="%o5";
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$nhi="%l0"; # small values and pointers
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$nlo="%l1";
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$xi0="%l2";
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$xi1="%l3";
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$rem_4bit="%l4";
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$remi="%l5";
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$Htblo="%l6";
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$cnt="%l7";
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$Xi="%i0"; # input argument block
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$Htbl="%i1";
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$inp="%i2";
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$len="%i3";
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$code.=<<___;
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.section ".text",#alloc,#execinstr
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.align 64
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rem_4bit:
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.long `0x0000<<16`,0,`0x1C20<<16`,0,`0x3840<<16`,0,`0x2460<<16`,0
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.long `0x7080<<16`,0,`0x6CA0<<16`,0,`0x48C0<<16`,0,`0x54E0<<16`,0
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.long `0xE100<<16`,0,`0xFD20<<16`,0,`0xD940<<16`,0,`0xC560<<16`,0
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.long `0x9180<<16`,0,`0x8DA0<<16`,0,`0xA9C0<<16`,0,`0xB5E0<<16`,0
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.type rem_4bit,#object
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.size rem_4bit,(.-rem_4bit)
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.globl gcm_ghash_4bit
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.align 32
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gcm_ghash_4bit:
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save %sp,-$frame,%sp
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ldub [$inp+15],$nlo
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ldub [$Xi+15],$xi0
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ldub [$Xi+14],$xi1
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add $len,$inp,$len
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add $Htbl,8,$Htblo
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1: call .+8
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add %o7,rem_4bit-1b,$rem_4bit
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.Louter:
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xor $xi0,$nlo,$nlo
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and $nlo,0xf0,$nhi
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and $nlo,0x0f,$nlo
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sll $nlo,4,$nlo
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ldx [$Htblo+$nlo],$Zlo
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ldx [$Htbl+$nlo],$Zhi
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ldub [$inp+14],$nlo
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ldx [$Htblo+$nhi],$Tlo
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and $Zlo,0xf,$remi
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ldx [$Htbl+$nhi],$Thi
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sll $remi,3,$remi
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ldx [$rem_4bit+$remi],$rem
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srlx $Zlo,4,$Zlo
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mov 13,$cnt
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $xi1,$nlo,$nlo
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and $Zlo,0xf,$remi
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and $nlo,0xf0,$nhi
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and $nlo,0x0f,$nlo
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ba .Lghash_inner
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sll $nlo,4,$nlo
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.align 32
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.Lghash_inner:
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ldx [$Htblo+$nlo],$Tlo
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sll $remi,3,$remi
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xor $Thi,$Zhi,$Zhi
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ldx [$Htbl+$nlo],$Thi
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srlx $Zlo,4,$Zlo
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xor $rem,$Zhi,$Zhi
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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ldub [$inp+$cnt],$nlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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ldub [$Xi+$cnt],$xi1
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xor $Thi,$Zhi,$Zhi
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nhi],$Tlo
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sll $remi,3,$remi
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xor $rem,$Zhi,$Zhi
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ldx [$Htbl+$nhi],$Thi
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srlx $Zlo,4,$Zlo
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $xi1,$nlo,$nlo
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srlx $Zhi,4,$Zhi
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and $nlo,0xf0,$nhi
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addcc $cnt,-1,$cnt
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xor $Zlo,$tmp,$Zlo
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and $nlo,0x0f,$nlo
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xor $Tlo,$Zlo,$Zlo
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sll $nlo,4,$nlo
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blu .Lghash_inner
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nlo],$Tlo
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sll $remi,3,$remi
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xor $Thi,$Zhi,$Zhi
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ldx [$Htbl+$nlo],$Thi
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srlx $Zlo,4,$Zlo
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xor $rem,$Zhi,$Zhi
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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add $inp,16,$inp
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cmp $inp,$len
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be,pn `$bits==64?"%xcc":"%icc"`,.Ldone
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nhi],$Tlo
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sll $remi,3,$remi
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xor $rem,$Zhi,$Zhi
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ldx [$Htbl+$nhi],$Thi
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srlx $Zlo,4,$Zlo
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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ldub [$inp+15],$nlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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stx $Zlo,[$Xi+8]
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xor $rem,$Zhi,$Zhi
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stx $Zhi,[$Xi]
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srl $Zlo,8,$xi1
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and $Zlo,0xff,$xi0
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ba .Louter
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and $xi1,0xff,$xi1
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.align 32
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.Ldone:
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ldx [$Htblo+$nhi],$Tlo
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sll $remi,3,$remi
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xor $rem,$Zhi,$Zhi
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ldx [$Htbl+$nhi],$Thi
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srlx $Zlo,4,$Zlo
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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stx $Zlo,[$Xi+8]
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xor $rem,$Zhi,$Zhi
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stx $Zhi,[$Xi]
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ret
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restore
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.type gcm_ghash_4bit,#function
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.size gcm_ghash_4bit,(.-gcm_ghash_4bit)
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___
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undef $inp;
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undef $len;
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$code.=<<___;
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.globl gcm_gmult_4bit
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.align 32
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gcm_gmult_4bit:
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save %sp,-$frame,%sp
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ldub [$Xi+15],$nlo
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add $Htbl,8,$Htblo
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1: call .+8
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add %o7,rem_4bit-1b,$rem_4bit
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and $nlo,0xf0,$nhi
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and $nlo,0x0f,$nlo
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sll $nlo,4,$nlo
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ldx [$Htblo+$nlo],$Zlo
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ldx [$Htbl+$nlo],$Zhi
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ldub [$Xi+14],$nlo
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ldx [$Htblo+$nhi],$Tlo
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and $Zlo,0xf,$remi
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ldx [$Htbl+$nhi],$Thi
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sll $remi,3,$remi
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ldx [$rem_4bit+$remi],$rem
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srlx $Zlo,4,$Zlo
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mov 13,$cnt
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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and $Zlo,0xf,$remi
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and $nlo,0xf0,$nhi
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and $nlo,0x0f,$nlo
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ba .Lgmult_inner
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sll $nlo,4,$nlo
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.align 32
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.Lgmult_inner:
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ldx [$Htblo+$nlo],$Tlo
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sll $remi,3,$remi
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xor $Thi,$Zhi,$Zhi
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ldx [$Htbl+$nlo],$Thi
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srlx $Zlo,4,$Zlo
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xor $rem,$Zhi,$Zhi
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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ldub [$Xi+$cnt],$nlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nhi],$Tlo
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sll $remi,3,$remi
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xor $rem,$Zhi,$Zhi
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ldx [$Htbl+$nhi],$Thi
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srlx $Zlo,4,$Zlo
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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srlx $Zhi,4,$Zhi
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and $nlo,0xf0,$nhi
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addcc $cnt,-1,$cnt
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xor $Zlo,$tmp,$Zlo
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and $nlo,0x0f,$nlo
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xor $Tlo,$Zlo,$Zlo
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sll $nlo,4,$nlo
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blu .Lgmult_inner
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nlo],$Tlo
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sll $remi,3,$remi
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xor $Thi,$Zhi,$Zhi
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ldx [$Htbl+$nlo],$Thi
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srlx $Zlo,4,$Zlo
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xor $rem,$Zhi,$Zhi
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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and $Zlo,0xf,$remi
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ldx [$Htblo+$nhi],$Tlo
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sll $remi,3,$remi
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xor $rem,$Zhi,$Zhi
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ldx [$Htbl+$nhi],$Thi
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srlx $Zlo,4,$Zlo
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ldx [$rem_4bit+$remi],$rem
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sllx $Zhi,60,$tmp
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xor $Tlo,$Zlo,$Zlo
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srlx $Zhi,4,$Zhi
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xor $Zlo,$tmp,$Zlo
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xor $Thi,$Zhi,$Zhi
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stx $Zlo,[$Xi+8]
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xor $rem,$Zhi,$Zhi
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stx $Zhi,[$Xi]
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ret
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restore
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.type gcm_gmult_4bit,#function
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.size gcm_gmult_4bit,(.-gcm_gmult_4bit)
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.asciz "GHASH for SPARCv9, CRYPTOGAMS by <appro\@openssl.org>"
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.align 4
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___
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$code =~ s/\`([^\`]*)\`/eval $1/gem;
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print $code;
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close STDOUT;
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