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sha256-586.pl optimization.

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This commit is contained in:
Andy Polyakov 2012-05-19 10:10:30 +00:00
parent 41409651be
commit ee9bf3eb6c
1 changed files with 75 additions and 68 deletions
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143
crypto/sha/asm/sha256-586.pl
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@ -9,20 +9,30 @@
#
# SHA256 block transform for x86. September 2007.
#
# Performance improvement over compiler generated code varies from
# 10% to 40% [see below]. Not very impressive on some µ-archs, but
# it's 5 times smaller and optimizies amount of writes.
#
# May 2012.
#
# Optimization including one of Pavel Semjanov's ideas resulted in
# ~5% improvement on P4, AMD and Sandy Bridge, and ~13% on Atom.
# Pavel also suggested full unroll. While his code runs ~20%/13%/6%
# faster on K8/Core2/Sandy Bridge, it's 9.6x larger and ~6%/18%/24%
# slower on P4/Atom/Pentium...
#
# Performance in clock cycles per processed byte (less is better):
#
# Pentium PIII P4 AMD K8 Core2
# Pentium PIII P4 AMD K8 Core2 SB(**) Atom
# gcc 46 36 41 27 26
# icc 57 33 38 25 23
# x86 asm 40 30 33 20 18
# x86_64 asm(*) - - 21 16 16
# x86 asm 39 29 31 19 18 19(**) 31
# x86_64 asm(*) - - 21 16 16 18 25
#
# (*) x86_64 assembler performance is presented for reference
# purposes.
#
# Performance improvement over compiler generated code varies from
# 10% to 40% [see above]. Not very impressive on some µ-archs, but
# it's 5 times smaller and optimizies amount of writes.
# (*) x86_64 assembler performance is presented for reference
# purposes.
# (**) Sandy Bridge results can be improved by ~20% by replacing
# ror with equivalent shrd.
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../perlasm");
@ -33,67 +43,62 @@ require "x86asm.pl";
$A="eax";
$E="edx";
$T="ebx";
$Aoff=&DWP(0,"esp");
$Boff=&DWP(4,"esp");
$Coff=&DWP(8,"esp");
$Doff=&DWP(12,"esp");
$Eoff=&DWP(16,"esp");
$Foff=&DWP(20,"esp");
$Goff=&DWP(24,"esp");
$Hoff=&DWP(28,"esp");
$Xoff=&DWP(32,"esp");
$Aoff=&DWP(4,"esp");
$Boff=&DWP(8,"esp");
$Coff=&DWP(12,"esp");
$Doff=&DWP(16,"esp");
$Eoff=&DWP(20,"esp");
$Foff=&DWP(24,"esp");
$Goff=&DWP(28,"esp");
$Hoff=&DWP(32,"esp");
$Xoff=&DWP(36,"esp");
$K256="ebp";
# *ror = sub { &shrd(@_[0],@_) };
sub BODY_00_15() {
my $in_16_63=shift;
&mov ("ecx",$E);
&add ($T,"edi") if ($in_16_63); # T += sigma1(X[-2])
&ror ("ecx",25-11);
&mov ("esi",$Foff);
&ror ("ecx",25-11);
&add ($T,"edi") if ($in_16_63); # T += sigma1(X[-2])
&xor ("ecx",$E);
&ror ("ecx",11-6);
&mov (&DWP(4*(8+15),"esp"),$T) if ($in_16_63); # save X[0]
&xor ("ecx",$E);
&ror ("ecx",6); # Sigma1(e)
&mov ("edi",$Goff);
&ror ("ecx",11-6);
&xor ("esi","edi");
&xor ("ecx",$E);
&mov (&DWP(4*(9+15),"esp"),$T) if ($in_16_63); # save X[0]
&ror ("ecx",6); # Sigma1(e)
&and ("esi",$E);
&add ($T,"ecx"); # T += Sigma1(e)
&xor ("esi","edi");
&mov ($Eoff,$E); # modulo-scheduled
&mov ("ecx",$A);
&and ("esi",$E);
&mov ($E,$Doff); # e becomes d, which is e in next iteration
&xor ("esi","edi"); # Ch(e,f,g)
&mov ("edi",$A);
&add ($T,"esi"); # T += Ch(e,f,g)
&ror ("ecx",22-13);
&add ($T,$Hoff); # T += h
&xor ("ecx",$A);
&ror ("ecx",13-2);
&mov ("esi",$Boff);
&xor ("ecx",$A);
&ror ("ecx",2); # Sigma0(a)
&add ($E,$T); # d += T
&mov ("edi",$Coff);
&add ($T,"ecx"); # T += Sigma0(a)
&mov ($Aoff,$A); # modulo-scheduled
&mov ("ecx",$A);
&sub ("esp",4);
&or ($A,"esi"); # a becomes h, which is a in next iteration
&and ("ecx","esi");
&and ($A,"edi");
&mov ($E,$Doff); # e becomes d, which is e in next iteration
&ror ("ecx",22-13);
&add ($T,"esi"); # T += Ch(e,f,g)
&xor ("ecx",$A);
&mov ("esi",&DWP(0,$K256));
&or ($A,"ecx"); # h=Maj(a,b,c)
&ror ("ecx",13-2);
&mov ("edi",$Boff);
&xor ("ecx",$A);
&mov ($Aoff,$A); # modulo-scheduled
&ror ("ecx",2); # Sigma0(a)
&xor ($A,"edi"); # a ^= b
&add ($T,"esi");
&push ($A); # (b^c) in next round
&add ($E,$T); # d += T
&and ($A,&DWP(4,"esp")); # a &= (b^c)
&add ($T,"ecx"); # T += Sigma0(a)
&xor ($A,"edi"); # h = Maj(a,b,c) = Ch(a^b,c,b)
&add ($K256,4);
&add ($A,$T); # h += T
&mov ($T,&DWP(4*(8+15+16-1),"esp")) if ($in_16_63); # preload T
&add ($E,"esi"); # d += K256[i]
&add ($A,"esi"); # h += K256[i]
&add ($A,$T); # h += T
&mov ($T,&DWP(4*(9+15+16-1),"esp")) if ($in_16_63); # preload T
}
&function_begin("sha256_block_data_order");
@ -123,19 +128,19 @@ sub BODY_00_15() {
&mov ("eax",&DWP($i*16+0,"edi"));
&mov ("ebx",&DWP($i*16+4,"edi"));
&mov ("ecx",&DWP($i*16+8,"edi"));
&mov ("edx",&DWP($i*16+12,"edi"));
&bswap ("eax");
&mov ("edx",&DWP($i*16+12,"edi"));
&bswap ("ebx");
&bswap ("ecx");
&bswap ("edx");
&push ("eax");
&bswap ("ecx");
&push ("ebx");
&bswap ("edx");
&push ("ecx");
&push ("edx");
}
&add ("edi",64);
&sub ("esp",4*8); # place for A,B,C,D,E,F,G,H
&mov (&DWP(4*(8+16)+4,"esp"),"edi");
&lea ("esp",&DWP(-4*9,"esp"));# place for A,B,C,D,E,F,G,H
&mov (&DWP(4*(9+16)+4,"esp"),"edi");
# copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
&mov ($A,&DWP(0,"esi"));
@ -144,8 +149,10 @@ sub BODY_00_15() {
&mov ("edi",&DWP(12,"esi"));
# &mov ($Aoff,$A);
&mov ($Boff,"ebx");
&xor ("ebx","ecx");
&mov ($Coff,"ecx");
&mov ($Doff,"edi");
&mov (&DWP(0,"esp"),"ebx"); # magic
&mov ($E,&DWP(16,"esi"));
&mov ("ebx",&DWP(20,"esi"));
&mov ("ecx",&DWP(24,"esi"));
@ -156,41 +163,41 @@ sub BODY_00_15() {
&mov ($Hoff,"edi");
&set_label("00_15",16);
&mov ($T,&DWP(4*(8+15),"esp"));
&mov ($T,&DWP(4*(9+15),"esp"));
&BODY_00_15();
&cmp ("esi",0xc19bf174);
&jne (&label("00_15"));
&mov ($T,&DWP(4*(8+15+16-1),"esp")); # preloaded in BODY_00_15(1)
&mov ($T,&DWP(4*(9+15+16-1),"esp")); # preloaded in BODY_00_15(1)
&set_label("16_63",16);
&mov ("esi",$T);
&mov ("ecx",&DWP(4*(8+15+16-14),"esp"));
&mov ("ecx",&DWP(4*(9+15+16-14),"esp"));
&ror ("esi",18-7);
&mov ("edi","ecx");
&xor ("esi",$T);
&shr ($T,3);
&ror ("esi",7);
&shr ($T,3);
&ror ("edi",19-17);
&xor ($T,"esi"); # T = sigma0(X[-15])
&xor ("edi","ecx");
&shr ("ecx",10);
&ror ("edi",17);
&shr ("ecx",10);
&add ($T,&DWP(4*(8+15+16),"esp")); # T += X[-16]
&add ($T,&DWP(4*(9+15+16),"esp")); # T += X[-16]
&xor ("edi","ecx"); # sigma1(X[-2])
&add ($T,&DWP(4*(8+15+16-9),"esp")); # T += X[-7]
&add ($T,&DWP(4*(9+15+16-9),"esp")); # T += X[-7]
# &add ($T,"edi"); # T += sigma1(X[-2])
# &mov (&DWP(4*(8+15),"esp"),$T); # save X[0]
# &mov (&DWP(4*(9+15),"esp"),$T); # save X[0]
&BODY_00_15(1);
&cmp ("esi",0xc67178f2);
&jne (&label("16_63"));
&mov ("esi",&DWP(4*(8+16+64)+0,"esp"));#ctx
&mov ("esi",&DWP(4*(9+16+64)+0,"esp"));#ctx
# &mov ($A,$Aoff);
&mov ("ebx",$Boff);
&mov ("ecx",$Coff);
@ -207,7 +214,7 @@ sub BODY_00_15() {
&mov ("eax",$Foff);
&mov ("ebx",$Goff);
&mov ("ecx",$Hoff);
&mov ("edi",&DWP(4*(8+16+64)+4,"esp"));#inp
&mov ("edi",&DWP(4*(9+16+64)+4,"esp"));#inp
&add ($E,&DWP(16,"esi"));
&add ("eax",&DWP(20,"esi"));
&add ("ebx",&DWP(24,"esi"));
@ -217,7 +224,7 @@ sub BODY_00_15() {
&mov (&DWP(24,"esi"),"ebx");
&mov (&DWP(28,"esi"),"ecx");
&add ("esp",4*(8+16+64)); # destroy frame
&lea ("esp",&DWP(4*(9+16+64),"esp"));# destroy frame
&sub ($K256,4*64); # rewind K
&cmp ("edi",&DWP(8,"esp")); # are we done yet?