--- a/CRC32Stream.st	Sun Mar 17 15:09:28 2019 +0100
+++ b/CRC32Stream.st	Sun Mar 17 15:09:39 2019 +0100
@@ -57,11 +57,11 @@
     Only use CRC to protect against communication errors;
     do NOT use CRC for cryptography - use SHA1Stream or MD5Stream instead.
 
-    Notice that this CRC is also used with PNG images - therefore, its performance
-    directly affects png image processing.
+    Notice that this CRC is also used with PNG images; 
+    therefore, its performance directly affects png image processing (png write speed).
 
     throughput:
-        220 Mb/s on MacBook Pro (2.6Ghz I7)
+        235 Mb/s on MacBook Pro (2.6Ghz I7)
         157000 Kb/s on a 2.5Ghz 64X2 Athlon 4800+ (64bit)
         150000 Kb/s on 2Ghz Duo
 
@@ -117,7 +117,7 @@
     |hashStream n t|
 
     hashStream := CRC32Stream new.
-    n := 1000000.
+    n := 2000000.
     t := Time millisecondsToRun:[
             n timesRepeat:[
                 hashStream nextPutAll:'12345678901234567890123456789012345678901234567890'.
@@ -192,14 +192,13 @@
 !
 
 new
-    "return an instance of the ITU-T CRC-32
-        x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1"
+    "return an instance of the ITU-T CRC-32"
 
-    "/ 16r4C11DB7 bitReversed32 -> 16rEDB88320
     ^ self newCCITT
 
     "Created: / 16-03-2019 / 21:09:19 / Claus Gittinger"
     "Modified: / 16-03-2019 / 23:29:45 / Claus Gittinger"
+    "Modified (comment): / 17-03-2019 / 14:34:47 / Claus Gittinger"
 !
 
 newCCITT
@@ -207,18 +206,41 @@
         x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1"
 
     "/ 16r4C11DB7 bitReversed32 -> 16rEDB88320
-    ^ self generatorPolynom:16rEDB88320 initValue:16rFFFFFFFF xorOut:16rFFFFFFFF
+    ^ self generatorPolynomMSB:16r4C11DB7 
+           initValue:16rFFFFFFFF xorOut:16rFFFFFFFF
 
     "Created: / 16-03-2019 / 23:29:39 / Claus Gittinger"
+    "Modified: / 17-03-2019 / 14:07:36 / Claus Gittinger"
 !
 
-newCrc32c
+newCastagnoli
     "return an instance of the Castagnoli CRC-32
         x32 + x28 + x27 + x26 + x25 + x23 + x22 + x20 + x19 + x18 + x14 + x13 + x11 + x10 + x9 + x8 + x6 + 1
      (used in iSCSI & SCTP, G.hn payload, SSE4.2)"
 
     "/ 16r1edc6f41 bitReversed32 -> 16r82F63B78
-    ^ self generatorPolynom:16r82F63B78 initValue:16rFFFFFFFF xorOut:16rFFFFFFFF
+    ^ self generatorPolynomMSB:16r1edc6f41 
+           initValue:16rFFFFFFFF xorOut:16rFFFFFFFF
+
+    "
+     Castagnoli crc:
+       self assert:((self newCrc32c)
+                                nextPut:'123456789';
+                                hashValue) = 3808858755. '16rE3069283'
+
+     default crc:
+       self assert:((self new)
+                                nextPut:'123456789';
+                                hashValue) = 3421780262. '16rCBF43926'
+    "
+
+    "Created: / 17-03-2019 / 14:33:54 / Claus Gittinger"
+!
+
+newCrc32c
+    "return an instance of the Castagnoli CRC-32"
+
+    ^ self newCastagnoli
 
     "
      Castagnoli crc:
@@ -233,7 +255,7 @@
     "
 
     "Modified (comment): / 17-05-2012 / 12:48:53 / cg"
-    "Modified: / 16-03-2019 / 21:21:07 / Claus Gittinger"
+    "Modified: / 17-03-2019 / 14:34:26 / Claus Gittinger"
 ! !
 
 !CRC32Stream methodsFor:'initialization'!