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ghash-x86_64.pl: minor optimization.

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This commit is contained in:
Andy Polyakov 2013-03-19 20:02:11 +01:00
parent 2f0275a4c3
commit fbf7c44bbf
1 changed files with 28 additions and 28 deletions
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56
crypto/modes/asm/ghash-x86_64.pl
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@ -773,15 +773,11 @@ $code.=<<___;
pxor $T1,$Xi # Ii+Xi
movdqa $Xln,$Xhn
pshufd \$0b01001110,$Xln,$Xmn
pxor $Xln,$Xmn
pshufd \$0b01001110,$Xln,$T1
pxor $Xln,$T1
pclmulqdq \$0x00,$Hkey,$Xln
pclmulqdq \$0x11,$Hkey,$Xhn
pclmulqdq \$0x00,$HK,$Xmn
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T1 #
pxor $Xi,$T1 #
pclmulqdq \$0x00,$HK,$T1
lea 32($inp),$inp # i+=2
sub \$0x20,$len
@ -790,30 +786,32 @@ $code.=<<___;
.align 32
.Lmod_loop:
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T2 #
pxor $Xi,$T2 #
pclmulqdq \$0x00,$Hkey2,$Xi
pclmulqdq \$0x11,$Hkey2,$Xhi
movdqu ($inp),$T2 # Ii
pclmulqdq \$0x10,$HK,$T1
pshufb $T3,$T2
pclmulqdq \$0x10,$HK,$T2
pxor $Xln,$Xi # (H*Ii+1) + H^2*(Ii+Xi)
movdqu 16($inp),$Xln # Ii+1
pxor $Xhn,$Xhi
movdqu ($inp),$Xhn # Ii
pshufb $T3,$Xhn
movdqu 16($inp),$Xln # Ii+1
pxor $Xi,$Xmn # aggregated Karatsuba post-processing
pxor $Xhi,$Xmn
pxor $T2,$Xhi # "Ii+Xi", consume early
pxor $Xmn,$T1
pxor $Xi,$T1 # aggregated Karatsuba post-processing
pxor $Xhi,$T1
pxor $Xhn,$Xhi # "Ii+Xi", consume early
pxor $T1,$T2
pshufb $T3,$Xln
movdqa $T1,$T2 #
movdqa $T2,$T1 #
psrldq \$8,$T1
pslldq \$8,$T2 #
pxor $T1,$Xhi
pxor $T2,$Xi #
movdqa $Xln,$Xhn #
pshufd \$0b01001110,$Xln,$Xmn
pxor $Xln,$Xmn #
movdqa $Xi,$T2 # 1st phase
movdqa $Xi,$T1
@ -828,6 +826,8 @@ $code.=<<___;
psrldq \$8,$T1 #
pxor $T2,$Xi
pxor $T1,$Xhi #
pshufd \$0b01001110,$Xhn,$T1
pxor $Xhn,$T1 #
pclmulqdq \$0x11,$Hkey,$Xhn #######
movdqa $Xi,$T2 # 2nd phase
@ -837,28 +837,28 @@ $code.=<<___;
psrlq \$5,$Xi
pxor $T2,$Xi #
psrlq \$1,$Xi #
pclmulqdq \$0x00,$HK,$Xmn #######
pclmulqdq \$0x00,$HK,$T1 #######
pxor $Xhi,$Xi #
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T1 #
pxor $Xi,$T1 #
lea 32($inp),$inp
sub \$0x20,$len
ja .Lmod_loop
.Leven_tail:
movdqa $Xi,$Xhi
pshufd \$0b01001110,$Xi,$T2 #
pxor $Xi,$T2 #
pclmulqdq \$0x00,$Hkey2,$Xi
pclmulqdq \$0x11,$Hkey2,$Xhi
pclmulqdq \$0x10,$HK,$T1
pclmulqdq \$0x10,$HK,$T2
pxor $Xln,$Xi # (H*Ii+1) + H^2*(Ii+Xi)
pxor $Xhn,$Xhi
pxor $Xi,$Xmn
pxor $Xhi,$Xmn
pxor $Xmn,$T1
movdqa $T1,$T2 #
pxor $Xi,$T1
pxor $Xhi,$T1
pxor $T1,$T2
movdqa $T2,$T1 #
psrldq \$8,$T1
pslldq \$8,$T2 #
pxor $T1,$Xhi