diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-24 11:50:27 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-24 11:50:27 -0700 |
commit | 9f22aae04631ec90eeab804b024de3c658dae406 (patch) | |
tree | a96393e19eff70ef7d5c50496abfea335301a44c /arch/m68k/lib/muldi3.c | |
parent | 988c7f2d6d5622c2407bcad49c0349fbad6489a7 (diff) | |
parent | 531d2895917566ab0d82faa0696d0576569f1053 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (22 commits)
m68knommu: Use generic show_interrupts()
coldfire_qspi compile fix
m68k: merge the mmu and non-mmu versions of sys_m68k.c
m68knommu: use asm-generic/bitops/ext2-atomic.h
m68knommu: Remove obsolete #include <linux/sys.h>
m68k: merge mmu and non-mmu versions of asm-offsets.c
m68k: merge non-mmu and mmu versions of m68k_ksyms.c
m68knommu: remove un-needed exporting of COLDFIRE symbols
m68knommu: move EXPORT of kernel_thread to function definition
m68knommu: move EXPORT of local checksumming functions to definitions
m68knommu: move EXPORT of dump_fpu to function definition
m68knommu: clean up mm/init_no.c
m68k: merge the mmu and non-mmu mm/Makefile
m68k: mv kmap_mm.c to kmap.c
m68knommu: remove stubs for __ioremap() and iounmap()
m68knommu: remove unused kernel_set_cachemode()
m68k: let Makefile sort out compiling mmu and non-mmu lib/checksum.c
m68k: remove duplicate memcpy() implementation
m68k: remove duplicate memset() implementation
m68k: remove duplicate memmove() implementation
...
Diffstat (limited to 'arch/m68k/lib/muldi3.c')
-rw-r--r-- | arch/m68k/lib/muldi3.c | 99 |
1 files changed, 96 insertions, 3 deletions
diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c index 16e0eb338ee..079bafca073 100644 --- a/arch/m68k/lib/muldi3.c +++ b/arch/m68k/lib/muldi3.c @@ -1,5 +1,98 @@ -#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; +} |