sha256-586.pl: code refresh.

diff --git a/crypto/sha/asm/sha256-586.pl b/crypto/sha/asm/sha256-586.pl
index 7244b00c87532f298d69b58e9d5766b7474d4db6..447c50b0ccf6dac98bcdb93ef430d3d3d3a01a89 100644 (file)
--- a/crypto/sha/asm/sha256-586.pl
+++ b/crypto/sha/asm/sha256-586.pl
@@ -33,10 +33,11 @@
 #              PIII    P4      AMD K8  Core2   SB      Atom    Bldzr
 # gcc          36      41      27      26      25      50      36
 # icc          33      38      25      23      -       -       -
-# x86 asm(*)   27/24   28      19/15.5 18/15.6 12.5    30/25   16.6
+# x86 asm(*)   27/24   28      19/15.5 18/15.6 12.3    30/25   16.6
 # x86_64 asm(**)       17.5    15.1    13.9    11.6    22      13.7
 #
-# (*)  numbers after slash are for unrolled loop, where available;
+# (*)  numbers after slash are for unrolled loop, where available,
+#      otherwise best applicable such as AVX/XOP;
 # (**) x86_64 assembly performance is presented for reference
 #      purposes.
 
@@ -775,32 +776,28 @@ sub Xupdate_AVX () {
        '&vpsrld        ($t3,$t0,3);',
        '&vpslld        ($t1,$t0,14);',
        '&vpxor         ($t0,$t3,$t2);',
+        '&vpshufd      ($t3,@X[3],0b11111010)',# X[14..15]
        '&vpsrld        ($t2,$t2,18-7);',
        '&vpxor         ($t0,$t0,$t1);',
        '&vpslld        ($t1,$t1,25-14);',
        '&vpxor         ($t0,$t0,$t2);',
-        '&vpsrld       ($t3,@X[3],10);',
+        '&vpsrld       ($t2,$t3,10);',
        '&vpxor         ($t0,$t0,$t1);',        # sigma0(X[1..4])
-        '&vpslld       ($t2,@X[3],13);',
+        '&vpsrlq       ($t1,$t3,17);',
        '&vpaddd        (@X[0],@X[0],$t0);',    # X[0..3] += sigma0(X[1..4])
-        '&vpsrld       ($t1,@X[3],17);',
-        '&vpxor        ($t3,$t3,$t2);',
-        '&vpslld       ($t2,$t2,15-13);',
-        '&vpxor        ($t3,$t3,$t1);',
-        '&vpsrld       ($t1,$t1,19-17);',
-        '&vpxor        ($t3,$t3,$t2);',
-        '&vpxor        ($t3,$t3,$t1);',        # sigma1(X[14..15])
+        '&vpxor        ($t2,$t2,$t1);',
+        '&vpsrlq       ($t3,$t3,19);',
+        '&vpxor        ($t2,$t2,$t3);',        # sigma1(X[14..15]
+        '&vpshufd      ($t3,$t2,0b10000100);',
        '&vpsrldq       ($t3,$t3,8);',
        '&vpaddd        (@X[0],@X[0],$t3);',    # X[0..1] += sigma1(X[14..15])
-        '&vpsrld       ($t3,@X[0],10);',
-        '&vpslld       ($t2,@X[0],13);',
-        '&vpsrld       ($t1,@X[0],17);',
-        '&vpxor        ($t3,$t3,$t2);',
-        '&vpslld       ($t2,$t2,15-13);',
-        '&vpxor        ($t3,$t3,$t1);',
-        '&vpsrld       ($t1,$t1,19-17);',
-        '&vpxor        ($t3,$t3,$t2);',
-        '&vpxor        ($t3,$t3,$t1);',        # sigma1(X[16..17])
+        '&vpshufd      ($t3,@X[0],0b01010000)',# X[16..17]
+        '&vpsrld       ($t2,$t3,10);',
+        '&vpsrlq       ($t1,$t3,17);',
+        '&vpxor        ($t2,$t2,$t1);',
+        '&vpsrlq       ($t3,$t3,19);',
+        '&vpxor        ($t2,$t2,$t3);',        # sigma1(X[16..17]
+        '&vpshufd      ($t3,$t2,0b11101000);',
        '&vpslldq       ($t3,$t3,8);',
        '&vpaddd        (@X[0],@X[0],$t3);'     # X[2..3] += sigma1(X[16..17])
        );
@@ -813,7 +810,7 @@ my $body = shift;
 my @X = @_;
 my @insns = (&$body,&$body,&$body,&$body);     # 120 instructions
 
-       foreach (Xupdate_AVX()) {               # 35 instructions
+       foreach (Xupdate_AVX()) {               # 31 instructions
            eval;
            eval(shift(@insns));
            eval(shift(@insns));