[LV-k25-commit] kernel-2.5/arch/vax/lib udiv.S,1.1,1.2 urem.S,1.1,1.2

[Jan-Benedict G. <jb...@us...>]

Update of /cvsroot/linux-vax/kernel-2.5/arch/vax/lib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv28752

Modified Files:
	udiv.S urem.S 
Log Message:
- Correct me if I'm wrong, but for saving R2, the register save mask
  should be 0x0004, not 0x0002. We need to set bit #2, not the 2nd
  bit.
- This code was taken from NetBSD, so we'd probably tell them?
- Why did it work, though? I think that GCC (or the whole VAX ABI)
  implies that R0 and R1 are for returning values (and thus may not
  be pushed onto the stack) and R2..R5 are ment for temporary values
  that are not preserved during CALLSing a function, so the compiler
  will reload these registers. Though, that's theory and I haven't
  tested it :-)


Index: urem.S
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/arch/vax/lib/urem.S,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- urem.S	25 May 2005 23:05:52 -0000	1.1
+++ urem.S	26 Sep 2005 19:15:18 -0000	1.2
@@ -49,7 +49,7 @@
 #define	DIVISOR		8(%ap)
 
 ENTRY(__urem)
-	.word	0x02		# save R2
+	.word	0x04		# save R2
 	movl	8(%ap),%r2
 	jlss	Leasy		# big divisor: settle by comparison
 	movl	4(%ap),%r0

Index: udiv.S
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/arch/vax/lib/udiv.S,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- udiv.S	25 May 2005 23:05:52 -0000	1.1
+++ udiv.S	26 Sep 2005 19:15:17 -0000	1.2
@@ -50,7 +50,7 @@
 #define	DIVISOR		8(%ap)
 
 ENTRY(__udiv)
-	.word	0x02		# save R2
+	.word	0x04		# save R2
 	movl	DIVISOR,%r2
 	jlss	Leasy		# big divisor: settle by comparison
 	movl	DIVIDEND,%r0