[LV-k25-commit] kernel-2.5/arch/vax/lib udiv.c,NONE,1.1 urem.c,NONE,1.1 Makefile,1.8,1.9

[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-serv22476

Modified Files:
	Makefile 
Added Files:
	udiv.c urem.c 
Log Message:
- Thanks to Kenn, I found my bad __udiv() function...
- __urem() can most probably be done better, though.
- Sunrise starts, I'd go to bed.


--- NEW FILE: urem.c ---

typedef signed int		SItype  __attribute__ ((mode (SI)));
typedef unsigned int		USItype __attribute__ ((mode (SI)));
typedef signed long long	DItype	__attribute__ ((mode (DI)));
typedef unsigned long long	UDItype	__attribute__ ((mode (DI)));

/*
 * This could probably be done better, but without clobbering r[2-4], gcc
 * re-used the MSB longword of the dividend, most probably because I
 * haven't told him correctly that this is a DItype...
 *
 * Also, keep an eye on where 'ret' gets allocated to. We want to keep
 * r0 unsused up to this point so gcc will schedult r0 for output which
 * will save another MOVL.
 */
USItype
__urem (USItype dividend, USItype divisor)
{
	USItype ret;
	USItype quotient;

	__asm__ (
	"	movl	%3, %%r2		\n"	/* r[23] = dividend	*/
	"	clrl	%%r3			\n"	/*			*/
	"	movl	%2, %%r4		\n"	/* r4 = divisor		*/
	"	ediv	%%r4, %%r2, %1, %0	\n"	/* %0 = dividend % divisor */
	: "=g" (ret),
	  "=g" (quotient)
	: "g" (divisor),
	  "g" (dividend)
	: "r2", "r3", "r4");

	return ret;
}


--- NEW FILE: udiv.c ---

typedef	signed int	SItype	__attribute__ ((mode (SI)));
typedef	unsigned int	USItype	__attribute__ ((mode (SI)));

USItype
__udiv (USItype dividend, USItype divisor)
{
	USItype ret;

	__asm__ (
	"	divl3	%2, %1, %0		\n"
	: "=g" (ret)
	: "g" (dividend),
	  "g" (divisor));

	return ret;
}


Index: Makefile
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.5/arch/vax/lib/Makefile,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -r1.8 -r1.9
--- Makefile	13 Oct 2003 01:07:26 -0000	1.8
+++ Makefile	24 May 2005 02:14:36 -0000	1.9
@@ -2,6 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-lib-y   := string.o negdi.o checksum.o lshrdi3.o strncpy_user.o \
-		copy_tofrom_user.o strnlen_user.o clear_user.o
+lib-y := string.o negdi.o checksum.o lshrdi3.o strncpy_user.o	\
+	 copy_tofrom_user.o strnlen_user.o clear_user.o		\
+	 udiv.o urem.o