Minor optimization for sha1-armv4 module.
authorAndy Polyakov <appro@openssl.org>
Thu, 25 Jan 2007 10:44:18 +0000 (10:44 +0000)
committerAndy Polyakov <appro@openssl.org>
Thu, 25 Jan 2007 10:44:18 +0000 (10:44 +0000)
crypto/sha/asm/sha1-armv4-large.pl

index 9df9af4..f54eef5 100644 (file)
@@ -7,7 +7,7 @@
 # details see http://www.openssl.org/~appro/cryptogams/.
 # ====================================================================
 
-# sha1_block precedure for ARMv4.
+# sha1_block procedure for ARMv4.
 #
 # January 2007.
 
 # impl         size in bytes   comp cycles[*]  measured performance
 # ====================================================================
 # thumb                304             3212            4420
-# armv4-small  392/+29%        1958/+64%       2290/+93%
-# armv4-compact        740/+89%        1552/+26%       1910/+20%
-# armv4-large  1420/+92%       1307/+19%       1630/+17%
-# full unroll  ~5100/+260%     ~1260/+4%       ~1600/+2%
+# armv4-small  392/+29%        1958/+64%       2250/+96%
+# armv4-compact        740/+89%        1552/+26%       1840/+22%
+# armv4-large  1420/+92%       1307/+19%       1500/+23%
+# full unroll  ~5100/+260%     ~1260/+4%       ~1500/+0%
 # ====================================================================
 # thumb                = same as 'small' but in Thumb instructions[**] and
 #                with recurring code in two private functions;
@@ -64,15 +64,16 @@ $code.=<<___;
        add     $e,$K,$e,ror#2                  @ E+=K_00_19
        orr     $t0,$t1,$t0,lsl#8
        ldrb    $t1,[$inp,#-1]
-       add     $e,$e,$a,ror#27                 @ E+=ROR(A,27)
        orr     $t0,$t2,$t0,lsl#8
+       add     $e,$e,$a,ror#27                 @ E+=ROR(A,27)
        orr     $t0,$t1,$t0,lsl#8
        add     $e,$e,$t0                       @ E+=X[i]
+       eor     $t1,$c,$d                       @ F_xx_xx
        str     $t0,[$Xi,#-4]!
 ___
 }
 sub Xupdate {
-my ($a,$b,$c,$d,$e)=@_;
+my ($a,$b,$c,$d,$e,$flag)=@_;
 $code.=<<___;
        ldr     $t0,[$Xi,#15*4]
        ldr     $t1,[$Xi,#13*4]
@@ -83,6 +84,11 @@ $code.=<<___;
        add     $e,$e,$a,ror#27                 @ E+=ROR(A,27)
        eor     $t0,$t0,$t2
        eor     $t0,$t0,$t1
+___
+$code.=<<___ if (!defined($flag));
+       eor     $t1,$c,$d                       @ F_xx_xx, but not in 40_59
+___
+$code.=<<___;
        mov     $t0,$t0,ror#31
        add     $e,$e,$t0                       @ E+=X[i]
        str     $t0,[$Xi,#-4]!
@@ -93,7 +99,6 @@ sub BODY_00_15 {
 my ($a,$b,$c,$d,$e)=@_;
        &Xload(@_);
 $code.=<<___;
-       eor     $t1,$c,$d
        and     $t1,$b,$t1,ror#2
        eor     $t1,$t1,$d,ror#2                @ F_00_19(B,C,D)
        add     $e,$e,$t1                       @ E+=F_00_19(B,C,D)
@@ -104,7 +109,6 @@ sub BODY_16_19 {
 my ($a,$b,$c,$d,$e)=@_;
        &Xupdate(@_);
 $code.=<<___;
-       eor     $t1,$c,$d
        and     $t1,$b,$t1,ror#2
        eor     $t1,$t1,$d,ror#2                @ F_00_19(B,C,D)
        add     $e,$e,$t1                       @ E+=F_00_19(B,C,D)
@@ -115,7 +119,6 @@ sub BODY_20_39 {
 my ($a,$b,$c,$d,$e)=@_;
        &Xupdate(@_);
 $code.=<<___;
-       eor     $t1,$c,$d
        eor     $t1,$b,$t1,ror#2                @ F_20_39(B,C,D)
        add     $e,$e,$t1                       @ E+=F_20_39(B,C,D)
 ___
@@ -123,7 +126,7 @@ ___
 
 sub BODY_40_59 {
 my ($a,$b,$c,$d,$e)=@_;
-       &Xupdate(@_);
+       &Xupdate(@_,1);
 $code.=<<___;
        and     $t1,$b,$c,ror#2
        orr     $t2,$b,$c,ror#2