[LV-kern-commit] CVS: kernel/include/asm-vax byteorder.h,1.1,1.2

[Andy P. <at...@us...>]

Update of /cvsroot/linux-vax/kernel/include/asm-vax
In directory usw-pr-cvs1:/tmp/cvs-serv28266

Modified Files:
	byteorder.h 
Log Message:
backport of byteorder.h from 2.4


Index: byteorder.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel/include/asm-vax/byteorder.h,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -r1.1 -r1.2
*** byteorder.h	2000/03/07 22:12:30	1.1
--- byteorder.h	2001/01/20 12:36:16	1.2
***************
*** 6,9 ****
--- 6,50 ----
  #include <asm/types.h>
  
+ #ifdef __GNUC__
+ 
+ static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
+ {
+   __u32 t1, t2;                     /* assume input is aabbccdd in x*/
+    
+        __asm__("clrl %0\n\t" 		     /* clear t1 */ 
+                "rotl $8, %2, %1\n\t"         /* %1 = bbccddaa */ 
+                "bisl3 $0xff00ff, %1, %0\n\t" /* %0 = 00cc00aa */ 
+                "rotl $-8, %2, %1\n\t"        /* %1 = ddaabbcc */
+                "bicl2 $0xff00ff, %1\n\t"     /* %1 = dd00bb00 */
+                "bisl2 %1, %0\n\t"            /* %0 = ddccbbaa */ 
+                : "=g" (t1), "=g" (t2) : "g" (x) ); 
+      return t1; 
+ }
+ 
+ static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
+ {
+   __u32 t1, t2, t3;
+ 	__asm__("clrl %2\n\t"
+ 		"movw %3,%2\n\t"    /* %2=0000aabb */
+ 		"rotl $-8,%2,%0\n\t"  /* %0=bb0000aa */
+ 		"ashl $24,%0,%1\n\t"  /* %1=aa000000 */
+ 		"rotl $8,%1,%0\n\t"   /* %0=000000aa */
+ 		"ashl $8,%2,%1\n\t"   /* %1=00aabb00 */
+ 		"bicl2 $0xfffff00ff, %1\n\t"   /* %1=0000bb00 */
+ 		"addl2 %1,%0\n\t"    /* %0=0000bbaa */
+ 		: "=g" (t1), "=g" (t2), "=g"(t3) : "g" (x));
+ 	return (__u16) t1;
+ }
+ 
+ #define __arch__swab32(x) ___arch__swab32(x)
+ #define __arch__swab16(x) ___arch__swab16(x)
+ 
+ #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+ #  define __BYTEORDER_HAS_U64__
+ #  define __SWAB_64_THRU_32__
+ #endif
+ 
+ #endif /* __GNUC__ */
+ 
  
  #include <linux/byteorder/little_endian.h>