Commit 98d655a6 authored by Greg Ungerer's avatar Greg Ungerer
Browse files

m68k: merge mmu and non-mmu versions of muldi3 



The implementation of gcc's muldi3 support function differs only in
the use of the machine's 64 bit sized mul or not. (It isn't based
on using an MMU or not). Merge the current mmu and non-mmu versions
of arc/m68k/lib/muldi3 and use the appropriate pre-processor
conditionals to get the right version for all m68k processor types.

Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.org>
Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent ea2b50ef

arch/m68k/lib/muldi3.c

+96 −3
Original line number Diff line number Diff line 
#ifdef CONFIG_MMU

#include "muldi3_mm.c"

/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and 

			   gcc-2.7.2.3/longlong.h which is: */

/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.



This file is part of GNU CC.



GNU CC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.



GNU CC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.



You should have received a copy of the GNU General Public License

along with GNU CC; see the file COPYING.  If not, write to

the Free Software Foundation, 59 Temple Place - Suite 330,

Boston, MA 02111-1307, USA.  */



#if defined(__mc68020__) || defined(__mc68030__) || \

    defined(__mc68040__) || defined(__mc68060__) || defined(__mcpu32__)



#define umul_ppmm(w1, w0, u, v) \

  __asm__ ("mulu%.l %3,%1:%0"						\

           : "=d" ((USItype)(w0)),					\

             "=d" ((USItype)(w1))					\

           : "%0" ((USItype)(u)),					\

             "dmi" ((USItype)(v)))



#else

#include "muldi3_no.c"



#define SI_TYPE_SIZE 32

#define __BITS4 (SI_TYPE_SIZE / 4)

#define __ll_B (1L << (SI_TYPE_SIZE / 2))

#define __ll_lowpart(t) ((USItype) (t) % __ll_B)

#define __ll_highpart(t) ((USItype) (t) / __ll_B)



#define umul_ppmm(w1, w0, u, v)						\

  do {									\

    USItype __x0, __x1, __x2, __x3;					\

    USItype __ul, __vl, __uh, __vh;					\

									\

    __ul = __ll_lowpart (u);						\

    __uh = __ll_highpart (u);						\

    __vl = __ll_lowpart (v);						\

    __vh = __ll_highpart (v);						\

									\

    __x0 = (USItype) __ul * __vl;					\

    __x1 = (USItype) __ul * __vh;					\

    __x2 = (USItype) __uh * __vl;					\

    __x3 = (USItype) __uh * __vh;					\

									\

    __x1 += __ll_highpart (__x0);/* this can't give carry */		\

    __x1 += __x2;		/* but this indeed can */		\

    if (__x1 < __x2)		/* did we get it? */			\

      __x3 += __ll_B;		/* yes, add it in the proper pos. */	\

									\

    (w1) = __x3 + __ll_highpart (__x1);					\

    (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0);		\

  } while (0)



#endif



#define __umulsidi3(u, v) \

  ({DIunion __w;							\

    umul_ppmm (__w.s.high, __w.s.low, u, v);				\

    __w.ll; })



typedef 	 int SItype	__attribute__ ((mode (SI)));

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

typedef		 int DItype	__attribute__ ((mode (DI)));

typedef int word_type __attribute__ ((mode (__word__)));



struct DIstruct {SItype high, low;};



typedef union

{

  struct DIstruct s;

  DItype ll;

} DIunion;



DItype

__muldi3 (DItype u, DItype v)

{

  DIunion w;

  DIunion uu, vv;



  uu.ll = u,

  vv.ll = v;



  w.ll = __umulsidi3 (uu.s.low, vv.s.low);

  w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high

	       + (USItype) uu.s.high * (USItype) vv.s.low);



  return w.ll;

}

arch/m68k/lib/muldi3_mm.c

deleted100644 → 0
+0 −63
Original line number Diff line number Diff line 
/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and

			   gcc-2.7.2.3/longlong.h which is: */

/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.



This file is part of GNU CC.



GNU CC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.



GNU CC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.



You should have received a copy of the GNU General Public License

along with GNU CC; see the file COPYING.  If not, write to

the Free Software Foundation, 59 Temple Place - Suite 330,

Boston, MA 02111-1307, USA.  */



#define BITS_PER_UNIT 8



#define umul_ppmm(w1, w0, u, v) \

  __asm__ ("mulu%.l %3,%1:%0"						\

           : "=d" ((USItype)(w0)),					\

             "=d" ((USItype)(w1))					\

           : "%0" ((USItype)(u)),					\

             "dmi" ((USItype)(v)))



#define __umulsidi3(u, v) \

  ({DIunion __w;							\

    umul_ppmm (__w.s.high, __w.s.low, u, v);				\

    __w.ll; })



typedef		 int SItype	__attribute__ ((mode (SI)));

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

typedef		 int DItype	__attribute__ ((mode (DI)));

typedef int word_type __attribute__ ((mode (__word__)));



struct DIstruct {SItype high, low;};



typedef union

{

  struct DIstruct s;

  DItype ll;

} DIunion;



DItype

__muldi3 (DItype u, DItype v)

{

  DIunion w;

  DIunion uu, vv;



  uu.ll = u,

  vv.ll = v;



  w.ll = __umulsidi3 (uu.s.low, vv.s.low);

  w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high

	       + (USItype) uu.s.high * (USItype) vv.s.low);



  return w.ll;

}

arch/m68k/lib/muldi3_no.c

deleted100644 → 0
+0 −86
Original line number Diff line number Diff line 
/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and 

			   gcc-2.7.2.3/longlong.h which is: */

/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.



This file is part of GNU CC.



GNU CC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.



GNU CC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.



You should have received a copy of the GNU General Public License

along with GNU CC; see the file COPYING.  If not, write to

the Free Software Foundation, 59 Temple Place - Suite 330,

Boston, MA 02111-1307, USA.  */



#define BITS_PER_UNIT 8

#define SI_TYPE_SIZE 32



#define __BITS4 (SI_TYPE_SIZE / 4)

#define __ll_B (1L << (SI_TYPE_SIZE / 2))

#define __ll_lowpart(t) ((USItype) (t) % __ll_B)

#define __ll_highpart(t) ((USItype) (t) / __ll_B)



#define umul_ppmm(w1, w0, u, v)						\

  do {									\

    USItype __x0, __x1, __x2, __x3;					\

    USItype __ul, __vl, __uh, __vh;					\

									\

    __ul = __ll_lowpart (u);						\

    __uh = __ll_highpart (u);						\

    __vl = __ll_lowpart (v);						\

    __vh = __ll_highpart (v);						\

									\

    __x0 = (USItype) __ul * __vl;					\

    __x1 = (USItype) __ul * __vh;					\

    __x2 = (USItype) __uh * __vl;					\

    __x3 = (USItype) __uh * __vh;					\

									\

    __x1 += __ll_highpart (__x0);/* this can't give carry */		\

    __x1 += __x2;		/* but this indeed can */		\

    if (__x1 < __x2)		/* did we get it? */			\

      __x3 += __ll_B;		/* yes, add it in the proper pos. */	\

									\

    (w1) = __x3 + __ll_highpart (__x1);					\

    (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0);		\

  } while (0)



#define __umulsidi3(u, v) \

  ({DIunion __w;							\

    umul_ppmm (__w.s.high, __w.s.low, u, v);				\

    __w.ll; })



typedef 	 int SItype	__attribute__ ((mode (SI)));

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

typedef		 int DItype	__attribute__ ((mode (DI)));

typedef int word_type __attribute__ ((mode (__word__)));



struct DIstruct {SItype high, low;};



typedef union

{

  struct DIstruct s;

  DItype ll;

} DIunion;



DItype

__muldi3 (DItype u, DItype v)

{

  DIunion w;

  DIunion uu, vv;



  uu.ll = u,

  vv.ll = v;



  w.ll = __umulsidi3 (uu.s.low, vv.s.low);

  w.s.high += ((USItype) uu.s.low * (USItype) vv.s.high

	       + (USItype) uu.s.high * (USItype) vv.s.low);



  return w.ll;

}

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