[OSy] chybejici __udivdi3

[Branislav Repček]

Zdravim,

ja som mal tiez tento problem a vyriesil som ho tak, ze som si
"napisal" makro, ktore robi 64 bitove delenie za mna.

longdiv.h:

#ifndef LONGDIV_H
#define LONGDIV_H

#include "types.h"

#define do_div64_32(res, high, low, base) ({ \
	unsigned long __quot32, __mod32; \
	unsigned long __cf, __tmp, __tmp2, __i; \
	\
	__asm__(".set	push\n\t" \
		".set	noat\n\t" \
		".set	noreorder\n\t" \
		"move	%2, $0\n\t" \
		"move	%3, $0\n\t" \
		"b	1f\n\t" \
		" li	%4, 0x21\n" \
		"0:\n\t" \
		"sll	$1, %0, 0x1\n\t" \
		"srl	%3, %0, 0x1f\n\t" \
		"or	%0, $1, %5\n\t" \
		"sll	%1, %1, 0x1\n\t" \
		"sll	%2, %2, 0x1\n" \
		"1:\n\t" \
		"bnez	%3, 2f\n\t" \
		" sltu	%5, %0, %z6\n\t" \
		"bnez	%5, 3f\n" \
		"2:\n\t" \
		" addiu	%4, %4, -1\n\t" \
		"subu	%0, %0, %z6\n\t" \
		"addiu	%2, %2, 1\n" \
		"3:\n\t" \
		"bnez	%4, 0b\n\t" \
		" srl	%5, %1, 0x1f\n\t" \
		".set	pop" \
		: "=&r" (__mod32), "=&r" (__tmp), \
		  "=&r" (__quot32), "=&r" (__cf), \
		  "=&r" (__i), "=&r" (__tmp2) \
		: "Jr" (base), "0" (high), "1" (low)); \
	\
	(res) = __quot32; \
	__mod32; })

#define do_div(n, base) ({ \
	unsigned long long __quot; \
	unsigned long __mod; \
	unsigned long long __div; \
	unsigned long __upper, __low, __high, __base; \
	\
	__div = (n); \
	__base = (base); \
	\
	__high = __div >> 32; \
	__low = __div; \
	__upper = __high; \
	\
	if (__high) \
		__asm__("divu	$0, %z2, %z3" \
			: "=h" (__upper), "=l" (__high) \
			: "Jr" (__high), "Jr" (__base) \
			: "$0"); \
	\
	__mod = do_div64_32(__low, __upper, __low, __base); \
	\
	__quot = __high; \
	__quot = __quot << 32 | __low; \
	(n) = __quot; \
	__mod; })

#endif

Tento kod je prakticky cely prebraty z
linux-2.6.23.1/include/asm-mips/div64.h a zatial mi funguje bez
problemov...

On Nov 3, 2007 2:33 PM, Zdeněk Doležal <zdenek.dolezal at gmail.com> wrote:
> Ahoj,
> nevim, zda je tohle stejny pripad jako nas, zkus make clean a
> distclean a pak prolozit znovu. Delalo nam to podobnou chybu.
>
>
> On 11/3/07, Josef Reidinger <josef.reidinger at seznam.cz> wrote:
> > Ahoj,
> > mam problem, ze pri prekladu deleni unsigned long long mi to pise
> > .../prereq/timer.o: In function `timer_start'
> > timer.c:(.text+0x4ac): undefined reference to `__udivdi3'
> > timer.c:(.text+0x4ac): relocation truncated to fit: R_MIPS_26 against
> > `__udivdi3
> >
> > pri googleni mi to naslo, ze by to melo byt v nejaky knihovne
> > /lib/libuuid.so.1 ale tu jsem nenasel a nejde mi slinkovat tedy kernel.
> > Netusite nekdo cim by se to dalo opravit?
> >
>
> --
> S pozdravem
> Zdenek Dolezal

-- 
Branislav Repcek
http://minimal.matfyz.cz