aes/asm/bsaes-x86_64.pl: update from master.

Performance improvement and Windows-specific bugfix (PR#3139).
(cherry picked from commit 9ed6fba2b4685ced2340feff03da5a12ed14b003)

diff --git a/crypto/aes/asm/bsaes-x86_64.pl b/crypto/aes/asm/bsaes-x86_64.pl
index ceb02b50ddb60d283345b27ad8a5a3d4a3b92534..41b90f08443f512bb0079910720936afff275fc7 100644 (file)
--- a/crypto/aes/asm/bsaes-x86_64.pl
+++ b/crypto/aes/asm/bsaes-x86_64.pl
@@ -83,9 +83,9 @@
 # Add decryption procedure. Performance in CPU cycles spent to decrypt
 # one byte out of 4096-byte buffer with 128-bit key is:
 #
-# Core 2       11.0
-# Nehalem      9.16
-# Atom         20.9
+# Core 2       9.83
+# Nehalem      7.74
+# Atom         19.0
 #
 # November 2011.
 #
@@ -456,6 +456,7 @@ sub MixColumns {
 # modified to emit output in order suitable for feeding back to aesenc[last]
 my @x=@_[0..7];
 my @t=@_[8..15];
+my $inv=@_[16];        # optional
 $code.=<<___;
        pshufd  \$0x93, @x[0], @t[0]    # x0 <<< 32
        pshufd  \$0x93, @x[1], @t[1]
@@ -497,7 +498,8 @@ $code.=<<___;
        pxor    @t[4], @t[0]
         pshufd \$0x4E, @x[2], @x[6]
        pxor    @t[5], @t[1]
-
+___
+$code.=<<___ if (!$inv);
        pxor    @t[3], @x[4]
        pxor    @t[7], @x[5]
        pxor    @t[6], @x[3]
@@ -505,9 +507,20 @@ $code.=<<___;
        pxor    @t[2], @x[6]
         movdqa @t[1], @x[7]
 ___
+$code.=<<___ if ($inv);
+       pxor    @x[4], @t[3]
+       pxor    @t[7], @x[5]
+       pxor    @x[3], @t[6]
+        movdqa @t[0], @x[3]
+       pxor    @t[2], @x[6]
+        movdqa @t[6], @x[2]
+        movdqa @t[1], @x[7]
+        movdqa @x[6], @x[4]
+        movdqa @t[3], @x[6]
+___
 }
 
-sub InvMixColumns {
+sub InvMixColumns_orig {
 my @x=@_[0..7];
 my @t=@_[8..15];
 
@@ -661,6 +674,54 @@ $code.=<<___;
 ___
 }
 
+sub InvMixColumns {
+my @x=@_[0..7];
+my @t=@_[8..15];
+
+# Thanks to Jussi Kivilinna for providing pointer to
+#
+# | 0e 0b 0d 09 |   | 02 03 01 01 |   | 05 00 04 00 |
+# | 09 0e 0b 0d | = | 01 02 03 01 | x | 00 05 00 04 |
+# | 0d 09 0e 0b |   | 01 01 02 03 |   | 04 00 05 00 |
+# | 0b 0d 09 0e |   | 03 01 01 02 |   | 00 04 00 05 |
+
+$code.=<<___;
+       # multiplication by 0x05-0x00-0x04-0x00
+       pshufd  \$0x4E, @x[0], @t[0]
+       pshufd  \$0x4E, @x[6], @t[6]
+       pxor    @x[0], @t[0]
+       pshufd  \$0x4E, @x[7], @t[7]
+       pxor    @x[6], @t[6]
+       pshufd  \$0x4E, @x[1], @t[1]
+       pxor    @x[7], @t[7]
+       pshufd  \$0x4E, @x[2], @t[2]
+       pxor    @x[1], @t[1]
+       pshufd  \$0x4E, @x[3], @t[3]
+       pxor    @x[2], @t[2]
+        pxor   @t[6], @x[0]
+        pxor   @t[6], @x[1]
+       pshufd  \$0x4E, @x[4], @t[4]
+       pxor    @x[3], @t[3]
+        pxor   @t[0], @x[2]
+        pxor   @t[1], @x[3]
+       pshufd  \$0x4E, @x[5], @t[5]
+       pxor    @x[4], @t[4]
+        pxor   @t[7], @x[1]
+        pxor   @t[2], @x[4]
+       pxor    @x[5], @t[5]
+
+        pxor   @t[7], @x[2]
+        pxor   @t[6], @x[3]
+        pxor   @t[6], @x[4]
+        pxor   @t[3], @x[5]
+        pxor   @t[4], @x[6]
+        pxor   @t[7], @x[4]
+        pxor   @t[7], @x[5]
+        pxor   @t[5], @x[7]
+___
+       &MixColumns     (@x,@t,1);      # flipped 2<->3 and 4<->6
+}
+
 sub aesenc {                           # not used
 my @b=@_[0..7];
 my @t=@_[8..15];
@@ -2028,6 +2089,8 @@ ___
 #      const unsigned char iv[16]);
 #
 my ($twmask,$twres,$twtmp)=@XMM[13..15];
+$arg6=~s/d$//;
+
 $code.=<<___;
 .globl bsaes_xts_encrypt
 .type  bsaes_xts_encrypt,\@abi-omnipotent