[LV-kern-commit] CVS: kernel-2.4/include/asm-vax checksum.h,1.3,1.4

[Dave A. <ai...@us...>]

Update of /cvsroot/linux-vax/kernel-2.4/include/asm-vax
In directory usw-pr-cvs1:/tmp/cvs-serv24183/include/asm-vax

Modified Files:
	checksum.h 
Log Message:
added tcpudp_magic and tcpudp_nofold not verified .. will verify later


Index: checksum.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/include/asm-vax/checksum.h,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- checksum.h	2001/02/22 23:25:08	1.3
+++ checksum.h	2001/02/25 00:09:22	1.4
@@ -62,17 +62,17 @@
  * computes the checksum of the TCP/UDP pseudo-header
  * returns a 16-bit checksum, already complemented
  */
-      
-extern unsigned short int csum_tcpudp_magic(unsigned long saddr,
-					   unsigned long daddr,
-					   unsigned short len,
-					   unsigned short proto,
-					   unsigned int sum);
-
-unsigned int csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
-				unsigned short len, unsigned short proto,
-				unsigned int sum);
-
+/*
+  extern unsigned short int csum_tcpudp_magic(unsigned long saddr,
+  unsigned long daddr,
+  unsigned short len,
+  unsigned short proto,
+  unsigned int sum);
+  
+  unsigned int csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
+  unsigned short len, unsigned short proto,
+  unsigned int sum)
+*/
 	
 /*
  * computes the checksum of a memory block at buff, length len,
@@ -149,6 +149,43 @@
 	sum = (sum & 0xffff) + (sum >> 16);
 	sum = (sum & 0xffff) + (sum >> 16);
 	return ~sum;
+}
+
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
+                                               unsigned long daddr,
+                                               unsigned short len,
+                                               unsigned short proto,
+                                               unsigned int sum)
+{
+	  
+  /*  in X86 this is  addl %1, %0
+                      adcl %2, %0
+                      adcl %3, %0
+             	      adcl $0, %0 */
+
+  __asm__("addl2 %1, %0\n"
+          "adwc %2, %0\n"
+          "adwc %3, %0\n"
+	  "adwc $0, %0\n"
+	  : "=r" (sum) : "g" (daddr), "g" (saddr), "g"((ntohs(len)<<16)+proto*256), "0" (sum));
+  return sum;
+}
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
+						   unsigned long daddr,
+						   unsigned short len,
+						   unsigned short proto,
+						   unsigned int sum)
+{
+	return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
 }
 
 /*