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提交 f889bb03 编写于 作者: A Andy Polyakov
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sha256-586.pl: full unroll to deliver additional ~16%, add Sandy Bridge- 

specific code path.
上级 83698d31
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crypto/sha/asm/sha256-586.pl
浏览文件 @ f889bb03
#!/usr/bin/env perl
#
# ====================================================================
# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see http://www.openssl.org/~appro/cryptogams/.
......@@ -15,24 +15,26 @@
#
# May 2012.
#
# Optimization including one of Pavel Semjanov's ideas resulted in
# ~5% improvement on AMD and Sandy Bridge, and ~15% on Atom and P4.
# Pavel also suggested full unroll. While his code runs ~20%/13%/6%
# faster on K8/Core2/Sandy Bridge, it's 9.6x larger and ~14%/23%/24%
# slower on P4/Atom/Pentium...
# Optimization including two of Pavel Semjanov's ideas, alternative
# Maj and full unroll, resulted in ~20-25% improvement on most CPUs,
# ~10% on Pentium and P4, ~37% on Atom. As fully unrolled loop body is
# almost 15x larger, 8KB vs. 560B, it's fired only for longer inputs.
# But not on P4, where it kills performance, nor Sandy Bridge, where
# folded loop is just as fast...
#
# Performance in clock cycles per processed byte (less is better):
#
# Pentium PIII P4 AMD K8 Core2 SB(**) Atom
# gcc 46 36 41 27 26
# icc 57 33 38 25 23
# x86 asm 39 31 29 19 18 19(**) 30
# x86_64 asm(*) - - 21 16 16 18 25
# gcc 46 36 41 27 26 25 50
# icc 57 33 38 25 23 - -
# x86 asm(*) 39/36 27/24 30 19/15.5 18/16 16(**) 30/26
# x86_64 asm(***) - 17.5 15 16 17.5 23
#
# (*) x86_64 assembler performance is presented for reference
# (*) numbers after slash are for unrolled loop, where available;
# (**) for Sandy Bridge executing code path with ror replaced with
# equivalent shrd;
# (***) x86_64 assembly 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}","${dir}../../perlasm");
......@@ -40,6 +42,8 @@ require "x86asm.pl";
&asm_init($ARGV[0],"sha512-586.pl",$ARGV[$#ARGV] eq "386");
$unroll_after = 1024;
$A="eax";
$E="edx";
$T="ebx";
......@@ -54,54 +58,76 @@ $Hoff=&DWP(32,"esp");
$Xoff=&DWP(36,"esp");
$K256="ebp";
# *ror = sub { &shrd(@_[0],@_) };
sub BODY_16_63() {
&mov ($T,"ecx"); # "ecx" is preloaded
&mov ("esi",&DWP(4*(9+15+16-14),"esp"));
&ror ("ecx",18-7);
&mov ("edi","esi");
&ror ("esi",19-17);
&xor ("ecx",$T);
&shr ($T,3);
&xor ("esi","edi");
&ror ("ecx",7);
&xor ($T,"ecx"); # T = sigma0(X[-15])
&ror ("esi",17);
&add ($T,&DWP(4*(9+15+16),"esp")); # T += X[-16]
&shr ("edi",10);
&add ($T,&DWP(4*(9+15+16-9),"esp")); # T += X[-7]
#&xor ("edi","esi") # sigma1(X[-2])
# &add ($T,"edi"); # T += sigma1(X[-2])
# &mov (&DWP(4*(9+15),"esp"),$T); # save X[0]
&BODY_00_15(1);
}
sub BODY_00_15() {
my $in_16_63=shift;
&mov ("ecx",$E);
&xor ("edi","esi") if ($in_16_63); # sigma1(X[-2])
&mov ("esi",$Foff);
&ror ("ecx",25-11);
&add ($T,"edi") if ($in_16_63); # T += sigma1(X[-2])
&mov ("edi",$Goff);
&xor ("ecx",$E);
&xor ("esi","edi");
&mov ($T,&DWP(4*(9+15),"esp")) if (!$in_16_63);
&mov (&DWP(4*(9+15),"esp"),$T) if ($in_16_63); # save X[0]
&ror ("ecx",11-6);
&and ("esi",$E);
&mov ($Eoff,$E); # modulo-scheduled
&mov ($Eoff,$E); # modulo-scheduled
&xor ($E,"ecx");
&xor ("esi","edi"); # Ch(e,f,g)
&add ($T,$Hoff); # T += h
&ror ($E,6); # Sigma1(e)
&xor ("esi","edi"); # Ch(e,f,g)
&add ($T,$Hoff); # T += h
&ror ($E,6); # Sigma1(e)
&mov ("ecx",$A);
&add ($T,"esi"); # T += Ch(e,f,g)
&add ($T,"esi"); # T += Ch(e,f,g)
&ror ("ecx",22-13);
&add ($T,$E); # T += Sigma1(e)
&add ($T,$E); # T += Sigma1(e)
&mov ("edi",$Boff);
&xor ("ecx",$A);
&mov ($Aoff,$A); # modulo-scheduled
&mov ($Aoff,$A); # modulo-scheduled
&lea ("esp",&DWP(-4,"esp"));
&ror ("ecx",13-2);
&mov ("esi",&DWP(0,$K256));
&xor ("ecx",$A);
&mov ($E,$Eoff); # e becomes d, which is e in next iteration
&xor ($A,"edi"); # a ^= b
&ror ("ecx",2); # Sigma0(a)
&mov ($E,$Eoff); # e in next iteration, d in this one
&xor ($A,"edi"); # a ^= b
&ror ("ecx",2); # Sigma0(a)
&add ($T,"esi"); # T+= K[i]
&mov (&DWP(0,"esp"),$A); # (b^c) in next round
&add ($E,$T); # d += T
&add ($T,"esi"); # T+= K[i]
&mov (&DWP(0,"esp"),$A); # (b^c) in next round
&add ($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 ($T,"ecx"); # T += Sigma0(a)
&xor ($A,"edi"); # h = Maj(a,b,c) = Ch(a^b,c,b)
&mov ("ecx",&DWP(4*(9+15+16-1),"esp")) if ($in_16_63); # preload T
&add ($K256,4);
&add ($A,$T); # h += T
&mov ($T,&DWP(4*(9+15+16-1),"esp")) if ($in_16_63); # preload T
&add ($A,$T); # h += T
}
&external_label("OPENSSL_ia32cap_P") if (!$i386);
&function_begin("sha256_block_data_order");
&mov ("esi",wparam(0)); # ctx
&mov ("edi",wparam(1)); # inp
......@@ -122,8 +148,28 @@ sub BODY_00_15() {
&mov (&DWP(4,"esp"),"edi"); # inp
&mov (&DWP(8,"esp"),"eax"); # inp+num*128
&mov (&DWP(12,"esp"),"ebx"); # saved sp
if (!$i386) {
&picmeup("edx","OPENSSL_ia32cap_P",$K256,&label("K256"));
&mov ("ecx",&DWP(0,"edx"));
&mov ("edx",&DWP(4,"edx"));
&test ("ecx",1<<20); # check for P4
&jnz (&label("loop"));
&and ("ecx",1<<30); # mask "Intel CPU" bit
&and ("edx",1<<28); # mask AVX bit
&or ("ecx","edx");
&cmp ("ecx",1<<28|1<<30);
&je (&label("loop_shrd"));
if ($unroll_after) {
&sub ("eax","edi");
&cmp ("eax",$unroll_after);
&jge (&label("unrolled"));
} }
&jmp (&label("loop"));
&set_label("loop",16);
sub COMPACT_LOOP() {
my $suffix=shift;
&set_label("loop$suffix",16);
# copy input block to stack reversing byte and dword order
for($i=0;$i<4;$i++) {
&mov ("eax",&DWP($i*16+0,"edi"));
......@@ -163,52 +209,36 @@ sub BODY_00_15() {
&mov ($Goff,"ecx");
&mov ($Hoff,"edi");
&set_label("00_15",16);
&mov ($T,&DWP(4*(9+15),"esp"));
&set_label("00_15$suffix",16);
&BODY_00_15();
&cmp ("esi",0xc19bf174);
&jne (&label("00_15"));
&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*(9+15+16-14),"esp"));
&ror ("esi",18-7);
&mov ("edi","ecx");
&ror ("ecx",19-17);
&xor ("esi",$T);
&shr ($T,3);
&xor ("ecx","edi");
&ror ("esi",7);
&xor ($T,"esi"); # T = sigma0(X[-15])
&ror ("ecx",17);
&add ($T,&DWP(4*(9+15+16),"esp")); # T += X[-16]
&shr ("edi",10);
&add ($T,&DWP(4*(9+15+16-9),"esp")); # T += X[-7]
&xor ("edi","ecx"); # sigma1(X[-2])
# &add ($T,"edi"); # T += sigma1(X[-2])
# &mov (&DWP(4*(9+15),"esp"),$T); # save X[0]
&jne (&label("00_15$suffix"));
&BODY_00_15(1);
&mov ("ecx",&DWP(4*(9+15+16-1),"esp")); # preloaded in BODY_00_15(1)
&jmp (&label("16_63$suffix"));
&set_label("16_63$suffix",16);
&BODY_16_63();
&cmp ("esi",0xc67178f2);
&jne (&label("16_63"));
&jne (&label("16_63$suffix"));
&mov ("esi",&DWP(4*(9+16+64)+0,"esp"));#ctx
# &mov ($A,$Aoff);
&mov ("ebx",$Boff);
&mov ("ecx",$Coff);
&mov ("edi",$Doff);
# &mov ("edi",$Coff);
&mov ("ecx",$Doff);
&add ($A,&DWP(0,"esi"));
&add ("ebx",&DWP(4,"esi"));
&add ("ecx",&DWP(8,"esi"));
&add ("edi",&DWP(12,"esi"));
&add ("edi",&DWP(8,"esi"));
&add ("ecx",&DWP(12,"esi"));
&mov (&DWP(0,"esi"),$A);
&mov (&DWP(4,"esi"),"ebx");
&mov (&DWP(8,"esi"),"ecx");
&mov (&DWP(12,"esi"),"edi");
&mov (&DWP(8,"esi"),"edi");
&mov (&DWP(12,"esi"),"ecx");
# &mov ($E,$Eoff);
&mov ("eax",$Foff);
&mov ("ebx",$Goff);
......@@ -227,28 +257,189 @@ sub BODY_00_15() {
&sub ($K256,4*64); # rewind K
&cmp ("edi",&DWP(8,"esp")); # are we done yet?
&jb (&label("loop"));
&jb (&label("loop$suffix"));
}
&COMPACT_LOOP();
&mov ("esp",&DWP(12,"esp")); # restore sp
&function_end_A();
if (!$i386) {
# ~20% improvement on Sandy Bridge
local *ror = sub { &shrd(@_[0],@_) };
&COMPACT_LOOP("_shrd");
&mov ("esp",&DWP(12,"esp")); # restore sp
&function_end_A();
}
&set_label("K256",64); # Yes! I keep it in the code segment!
&data_word(0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5);
&data_word(0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5);
&data_word(0xd807aa98,0x12835b01,0x243185be,0x550c7dc3);
&data_word(0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174);
&data_word(0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc);
&data_word(0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da);
&data_word(0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7);
&data_word(0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967);
&data_word(0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13);
&data_word(0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85);
&data_word(0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3);
&data_word(0xd192e819,0xd6990624,0xf40e3585,0x106aa070);
&data_word(0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5);
&data_word(0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3);
&data_word(0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208);
&data_word(0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2);
@K256=( 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,
0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,
0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,
0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,
0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,
0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,
0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,
0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,
0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2 );
&data_word(@K256);
if (!$i386 && $unroll_after) {
my @AH=($A,$K256);
&set_label("unrolled",16);
&lea ("esp",&DWP(-96,"esp"));
# copy ctx->h[0-7] to A,B,C,D,E,F,G,H on stack
&mov ($AH[0],&DWP(0,"esi"));
&mov ($AH[1],&DWP(4,"esi"));
&mov ("ecx",&DWP(8,"esi"));
&mov ("ebx",&DWP(12,"esi"));
#&mov (&DWP(0,"esp"),$AH[0]);
&mov (&DWP(4,"esp"),$AH[1]);
&xor ($AH[1],"ecx"); # magic
&mov (&DWP(8,"esp"),"ecx");
&mov (&DWP(12,"esp"),"ebx");
&mov ($E,&DWP(16,"esi"));
&mov ("ebx",&DWP(20,"esi"));
&mov ("ecx",&DWP(24,"esi"));
&mov ("esi",&DWP(28,"esi"));
#&mov (&DWP(16,"esp"),$E);
&mov (&DWP(20,"esp"),"ebx");
&mov (&DWP(24,"esp"),"ecx");
&mov (&DWP(28,"esp"),"esi");
&jmp (&label("grand_loop"));
&set_label("grand_loop",16);
# copy input block to stack reversing byte order
for($i=0;$i<5;$i++) {
&mov ("ebx",&DWP(12*$i+0,"edi"));
&mov ("ecx",&DWP(12*$i+4,"edi"));
&bswap ("ebx");
&mov ("esi",&DWP(12*$i+8,"edi"));
&bswap ("ecx");
&mov (&DWP(32+12*$i+0,"esp"),"ebx");
&bswap ("esi");
&mov (&DWP(32+12*$i+4,"esp"),"ecx");
&mov (&DWP(32+12*$i+8,"esp"),"esi");
}
&mov ("ebx",&DWP($i*12,"edi"));
&add ("edi",64);
&bswap ("ebx");
&mov (&DWP(96+4,"esp"),"edi");
&mov (&DWP(32+12*$i,"esp"),"ebx");
my ($a,$b,$c,$d,$e,$f,$g,$h)=(0..7); # offsets
sub off { &DWP(4*(((shift)-$i)&7),"esp"); }
for ($i=0;$i<64;$i++) {
if ($i>=16) {
&mov ($T,"ecx"); # "ecx" is preloaded
# &mov ("esi",&DWP(32+4*(($i+14)&15),"esp"));
&ror ("ecx",18-7);
&mov ("edi","esi");
&ror ("esi",19-17);
&xor ("ecx",$T);
&shr ($T,3);
&xor ("esi","edi");
&ror ("ecx",7);
&xor ($T,"ecx"); # T = sigma0(X[-15])
&ror ("esi",17);
&add ($T,&DWP(32+4*($i&15),"esp")); # T += X[-16]
&shr ("edi",10);
&add ($T,&DWP(32+4*(($i+9)&15),"esp")); # T += X[-7]
#&xor ("edi","esi") # sigma1(X[-2])
# &add ($T,"edi"); # T += sigma1(X[-2])
# &mov (&DWP(4*(9+15),"esp"),$T); # save X[0]
}
&mov ("ecx",$E);
&xor ("edi","esi") if ($i>=16); # sigma1(X[-2])
&mov ("esi",&off($f));
&ror ("ecx",25-11);
&add ($T,"edi") if ($i>=16); # T += sigma1(X[-2])
&mov ("edi",&off($g));
&xor ("ecx",$E);
&xor ("esi","edi");
&mov ($T,&DWP(32+4*($i&15),"esp")) if ($i<16); # X[i]
&mov (&DWP(32+4*($i&15),"esp"),$T) if ($i>=16); # save X[0]
&ror ("ecx",11-6);
&and ("esi",$E);
&mov (&off($e),$E); # modulo-scheduled
&xor ($E,"ecx");
&xor ("esi","edi"); # Ch(e,f,g)
&add ($T,&off($h)); # T += h
&ror ($E,6); # Sigma1(e)
&mov ("ecx",$AH[0]);
&add ($T,"esi"); # T += Ch(e,f,g)
&ror ("ecx",22-13);
&mov ("edi",&off($b));
&xor ("ecx",$AH[0]);
&mov (&off($a),$AH[0]); # modulo-scheduled
&ror ("ecx",13-2);
&lea ($T,&DWP(@K256[$i],$T,$E)); # T += Sigma1(1)+K[i]
&mov ($E,&off($d)); # e in next iteration, d in this one
&xor ("ecx",$AH[0]);
&xor ($AH[0],"edi"); # a ^= b, (b^c) in next round
&ror ("ecx",2); # Sigma0(a)
&add ($E,$T); # d += T
&and ($AH[1],$AH[0]); # a &= (b^c)
&add ($T,"ecx"); # T += Sigma0(a)
&mov ("ecx",&DWP(32+4*(($i+2)&15),"esp")) if ($i>=15 && $i<63);
&xor ($AH[1],"edi"); # h = Maj(a,b,c) = Ch(a^b,c,b)
&mov ("esi",&DWP(32+4*(($i+15)&15),"esp")) if ($i>=15 && $i<63);
&add ($AH[1],$T); # h += T
unshift(@AH,pop(@AH)); # rotate(a,h)
}
&mov ("esi",&DWP(96,"esp")); #ctx
#&mov ($AH[0],&DWP(0,"esp"));
&xor ($AH[1],"edi"); #&mov ($AH[1],&DWP(4,"esp"));
#&mov ("edi", &DWP(8,"esp"));
&mov ("ecx",&DWP(12,"esp"));
&add ($AH[0],&DWP(0,"esi"));
&add ($AH[1],&DWP(4,"esi"));
&add ("edi",&DWP(8,"esi"));
&add ("ecx",&DWP(12,"esi"));
&mov (&DWP(0,"esi"),$AH[0]);
&mov (&DWP(4,"esi"),$AH[1]);
&mov (&DWP(8,"esi"),"edi");
&mov (&DWP(12,"esi"),"ecx");
#&mov (&DWP(0,"esp"),$AH[0]);
&mov (&DWP(4,"esp"),$AH[1]);
&xor ($AH[1],"edi"); # magic
&mov (&DWP(8,"esp"),"edi");
&mov (&DWP(12,"esp"),"ecx");
#&mov ($E,&DWP(16,"esp"));
&mov ("edi",&DWP(20,"esp"));
&mov ("ebx",&DWP(24,"esp"));
&mov ("ecx",&DWP(28,"esp"));
&add ($E,&DWP(16,"esi"));
&add ("edi",&DWP(20,"esi"));
&add ("ebx",&DWP(24,"esi"));
&add ("ecx",&DWP(28,"esi"));
&mov (&DWP(16,"esi"),$E);
&mov (&DWP(20,"esi"),"edi");
&mov (&DWP(24,"esi"),"ebx");
&mov (&DWP(28,"esi"),"ecx");
#&mov (&DWP(16,"esp"),$E);
&mov (&DWP(20,"esp"),"edi");
&mov ("edi",&DWP(96+4,"esp")); # inp
&mov (&DWP(24,"esp"),"ebx");
&mov (&DWP(28,"esp"),"ecx");
&cmp ("edi",&DWP(96+8,"esp")); # are we done yet?
&jb (&label("grand_loop"));
&mov ("esp",&DWP(96+12,"esp")); # restore sp
&function_end_A();
}
&function_end_B("sha256_block_data_order");
&asciz("SHA256 block transform for x86, CRYPTOGAMS by <appro\@openssl.org>");
......
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