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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-24 11:50:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-24 11:50:27 -0700
commit9f22aae04631ec90eeab804b024de3c658dae406 (patch)
treea96393e19eff70ef7d5c50496abfea335301a44c /arch/m68k/lib/muldi3.c
parent988c7f2d6d5622c2407bcad49c0349fbad6489a7 (diff)
parent531d2895917566ab0d82faa0696d0576569f1053 (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.c99
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;
+}