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ghash-x86[_64].pl: ~15% improvement on Atom Silvermont

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(other processors unaffected).

(Imported from upstream's 7078d93307d795cec577ec4a792b72fffed551ab)
This commit is contained in:
Adam Langley 2014-06-20 12:00:00 -07:00
parent b6333d600e
commit d81f801f6d
2 changed files with 48 additions and 34 deletions
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16
crypto/modes/asm/ghash-x86.pl
View File

@ -1021,13 +1021,14 @@ my ($Xhi,$Xi) = @_;
&pshufd ($T1,$Xn,0b01001110); # H*Ii+1
&movdqa ($Xhn,$Xn);
&pxor ($T1,$Xn); #
&lea ($inp,&DWP(32,$inp)); # i+=2
&pclmulqdq ($Xn,$Hkey,0x00); #######
&pclmulqdq ($Xhn,$Hkey,0x11); #######
&movups ($Hkey,&QWP(16,$Htbl)); # load H^2
&pclmulqdq ($T1,$T3,0x00); #######
&movups ($Hkey,&QWP(16,$Htbl)); # load H^2
&nop ();
&lea ($inp,&DWP(32,$inp)); # i+=2
&sub ($len,0x20);
&jbe (&label("even_tail"));
&jmp (&label("mod_loop"));
@ -1036,22 +1037,23 @@ my ($Xhi,$Xi) = @_;
&pshufd ($T2,$Xi,0b01001110); # H^2*(Ii+Xi)
&movdqa ($Xhi,$Xi);
&pxor ($T2,$Xi); #
&nop ();
&pclmulqdq ($Xi,$Hkey,0x00); #######
&pclmulqdq ($Xhi,$Hkey,0x11); #######
&movups ($Hkey,&QWP(0,$Htbl)); # load H
&pclmulqdq ($T2,$T3,0x10); #######
&movdqa ($T3,&QWP(0,$const));
&movups ($Hkey,&QWP(0,$Htbl)); # load H
&xorps ($Xi,$Xn); # (H*Ii+1) + H^2*(Ii+Xi)
&movdqa ($T3,&QWP(0,$const));
&xorps ($Xhi,$Xhn);
&movdqu ($Xhn,&QWP(0,$inp)); # Ii
&pxor ($T1,$Xi); # aggregated Karatsuba post-processing
&movdqu ($Xn,&QWP(16,$inp)); # Ii+1
&pxor ($T1,$Xhi); #
&pxor ($T2,$T1); #
&pshufb ($Xhn,$T3);
&pxor ($T2,$T1); #
&movdqa ($T1,$T2); #
&psrldq ($T2,8);
@ -1068,8 +1070,8 @@ my ($Xhi,$Xi) = @_;
&pxor ($T1,$Xi); #
&psllq ($Xi,1);
&pxor ($Xi,$T1); #
&movups ($T3,&QWP(32,$Htbl));
&pclmulqdq ($Xn,$Hkey,0x00); #######
&movups ($T3,&QWP(32,$Htbl));
&psllq ($Xi,57); #
&movdqa ($T1,$Xi); #
&pslldq ($Xi,8);
@ -1080,9 +1082,9 @@ my ($Xhi,$Xi) = @_;
&movdqa ($T2,$Xi); # 2nd phase
&psrlq ($Xi,1);
&pxor ($T1,$Xhn);
&pxor ($Xhi,$T2); #
&pclmulqdq ($Xhn,$Hkey,0x11); #######
&movups ($Hkey,&QWP(16,$Htbl)); # load H^2
&pxor ($Xhi,$T2); #
&pxor ($T2,$Xi);
&psrlq ($Xi,5);
&pxor ($Xi,$T2); #

66
crypto/modes/asm/ghash-x86_64.pl
View File

@ -214,6 +214,7 @@ ___
$code=<<___;
.text
.extern OPENSSL_ia32cap_P
.globl gcm_gmult_4bit
.type gcm_gmult_4bit,\@function,2
@ -597,7 +598,8 @@ ___
}
{ my ($Xip,$Htbl,$inp,$len)=@_4args;
my ($Xln,$Xmn,$Xhn,$Hkey2,$HK) = map("%xmm$_",(6..10));
my ($Xln,$Xmn,$Xhn,$Hkey2,$HK) = map("%xmm$_",(3..7));
my ($T1,$T2,$T3)=map("%xmm$_",(8..10));
$code.=<<___;
.globl gcm_ghash_clmul
@ -624,7 +626,6 @@ $code.=<<___ if ($win64);
___
$code.=<<___;
movdqa .Lbswap_mask(%rip),$T3
mov \$0xA040608020C0E000,%rax # ((7..0)·0xE0)&0xff
movdqu ($Xip),$Xi
movdqu ($Htbl),$Hkey
@ -640,10 +641,16 @@ if ($do4xaggr) {
my ($Xl,$Xm,$Xh,$Hkey3,$Hkey4)=map("%xmm$_",(11..15));
$code.=<<___;
mov OPENSSL_ia32cap_P+4(%rip),%eax
cmp \$0x30,$len
jb .Lskip4x
and \$`1<<26|1<<22`,%eax # isolate MOVBE+XSAVE
cmp \$`1<<22`,%eax # check for MOVBE without XSAVE
je .Lskip4x
sub \$0x30,$len
mov \$0xA040608020C0E000,%rax # ((7..0)·0xE0)&0xff
movdqu 0x30($Htbl),$Hkey3
movdqu 0x40($Htbl),$Hkey4
@ -819,51 +826,54 @@ $code.=<<___;
pxor $T1,$Xi # Ii+Xi
movdqa $Xln,$Xhn
pshufd \$0b01001110,$Xln,$T1
pxor $Xln,$T1
pshufd \$0b01001110,$Xln,$Xmn
pxor $Xln,$Xmn
pclmulqdq \$0x00,$Hkey,$Xln
pclmulqdq \$0x11,$Hkey,$Xhn
pclmulqdq \$0x00,$HK,$T1
pclmulqdq \$0x00,$HK,$Xmn
lea 32($inp),$inp # i+=2
nop
sub \$0x20,$len
jbe .Leven_tail
nop
jmp .Lmod_loop
.align 32
.Lmod_loop:
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T2 #
pxor $Xi,$T2 #
movdqa $Xmn,$T1
pshufd \$0b01001110,$Xi,$Xmn #
pxor $Xi,$Xmn #
pclmulqdq \$0x00,$Hkey2,$Xi
pclmulqdq \$0x11,$Hkey2,$Xhi
pclmulqdq \$0x10,$HK,$T2
pclmulqdq \$0x10,$HK,$Xmn
pxor $Xln,$Xi # (H*Ii+1) + H^2*(Ii+Xi)
pxor $Xhn,$Xhi
movdqu ($inp),$Xhn # Ii
pxor $Xi,$T1 # aggregated Karatsuba post-processing
pshufb $T3,$Xhn
movdqu 16($inp),$Xln # Ii+1
pxor $Xi,$T1 # aggregated Karatsuba post-processing
pxor $Xhi,$T1
pxor $Xhn,$Xhi # "Ii+Xi", consume early
pxor $T1,$T2
pxor $T1,$Xmn
pshufb $T3,$Xln
movdqa $T2,$T1 #
movdqa $Xmn,$T1 #
psrldq \$8,$T1
pslldq \$8,$T2 #
pslldq \$8,$Xmn #
pxor $T1,$Xhi
pxor $T2,$Xi #
pxor $Xmn,$Xi #
movdqa $Xln,$Xhn #
movdqa $Xi,$T2 # 1st phase
movdqa $Xi,$T1
psllq \$5,$Xi
pclmulqdq \$0x00,$Hkey,$Xln #######
pxor $Xi,$T1 #
pclmulqdq \$0x00,$Hkey,$Xln #######
psllq \$1,$Xi
pxor $T1,$Xi #
psllq \$57,$Xi #
@ -871,9 +881,9 @@ $code.=<<___;
pslldq \$8,$Xi
psrldq \$8,$T1 #
pxor $T2,$Xi
pshufd \$0b01001110,$Xhn,$Xmn
pxor $T1,$Xhi #
pshufd \$0b01001110,$Xhn,$T1
pxor $Xhn,$T1 #
pxor $Xhn,$Xmn #
pclmulqdq \$0x11,$Hkey,$Xhn #######
movdqa $Xi,$T2 # 2nd phase
@ -882,33 +892,35 @@ $code.=<<___;
pxor $Xi,$T2
psrlq \$5,$Xi
pxor $T2,$Xi #
psrlq \$1,$Xi #
pclmulqdq \$0x00,$HK,$T1 #######
pxor $Xhi,$Xi #
lea 32($inp),$inp
psrlq \$1,$Xi #
pclmulqdq \$0x00,$HK,$Xmn #######
pxor $Xhi,$Xi #
.byte 0x66,0x90
sub \$0x20,$len
ja .Lmod_loop
.Leven_tail:
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T2 #
pxor $Xi,$T2 #
movdqa $Xmn,$T1
pshufd \$0b01001110,$Xi,$Xmn #
pxor $Xi,$Xmn #
pclmulqdq \$0x00,$Hkey2,$Xi
pclmulqdq \$0x11,$Hkey2,$Xhi
pclmulqdq \$0x10,$HK,$T2
pclmulqdq \$0x10,$HK,$Xmn
pxor $Xln,$Xi # (H*Ii+1) + H^2*(Ii+Xi)
pxor $Xhn,$Xhi
pxor $Xi,$T1
pxor $Xhi,$T1
pxor $T1,$T2
movdqa $T2,$T1 #
pxor $T1,$Xmn
movdqa $Xmn,$T1 #
psrldq \$8,$T1
pslldq \$8,$T2 #
pslldq \$8,$Xmn #
pxor $T1,$Xhi
pxor $T2,$Xi #
pxor $Xmn,$Xi #
___
&reduction_alg9 ($Xhi,$Xi);
$code.=<<___;