Move 64bit division from avr32 to generic lib

Move the 64bit division from lib_avr32 to lib_generic. With this, all
boards can do_div/__div64_32 if needed, not only avr one. Code is put
to lib_generic, so no larger memory footprint if not used. No code
modifications. Thanks for proposal by Håvard Skinnemoen.

Signed-off-by: Dirk Behme <dirk.behme@gmail.com>

2 files changed, 1 insertions, 55 deletions

diff --git a/lib_avr32/Makefile b/lib_avr32/Makefile
index cf20836..bb2938f 100644
--- a/lib_avr32/Makefile
+++ b/lib_avr32/Makefile
@@ -29,7 +29,7 @@ LIB	= $(obj)lib$(ARCH).a
 
 SOBJS	= memset.o
 
-COBJS	= board.o interrupts.o avr32_linux.o div64.o
+COBJS	= board.o interrupts.o avr32_linux.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/lib_avr32/div64.c b/lib_avr32/div64.c
deleted file mode 100644
index 99726e3..0000000
--- a/lib_avr32/div64.c
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2003 Bernardo Innocenti <bernie@develer.com>
- *
- * Based on former do_div() implementation from asm-parisc/div64.h:
- *	Copyright (C) 1999 Hewlett-Packard Co
- *	Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
- *
- *
- * Generic C version of 64bit/32bit division and modulo, with
- * 64bit result and 32bit remainder.
- *
- * The fast case for (n>>32 == 0) is handled inline by do_div().
- *
- * Code generated for this function might be very inefficient
- * for some CPUs. __div64_32() can be overridden by linking arch-specific
- * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S.
- */
-
-#include <linux/types.h>
-
-#include <asm/div64.h>
-
-uint32_t __div64_32(uint64_t *n, uint32_t base)
-{
-	uint64_t rem = *n;
-	uint64_t b = base;
-	uint64_t res, d = 1;
-	uint32_t high = rem >> 32;
-
-	/* Reduce the thing a bit first */
-	res = 0;
-	if (high >= base) {
-		high /= base;
-		res = (uint64_t) high << 32;
-		rem -= (uint64_t) (high*base) << 32;
-	}
-
-	while ((int64_t)b > 0 && b < rem) {
-		b = b+b;
-		d = d+d;
-	}
-
-	do {
-		if (rem >= b) {
-			rem -= b;
-			res += d;
-		}
-		b >>= 1;
-		d >>= 1;
-	} while (d);
-
-	*n = res;
-	return rem;
-}