diff options
Diffstat (limited to 'arch/m68k/lib/muldi3.c')
| -rw-r--r-- | arch/m68k/lib/muldi3.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c index be4f275649e3..079bafca073e 100644 --- a/arch/m68k/lib/muldi3.c +++ b/arch/m68k/lib/muldi3.c @@ -1,4 +1,4 @@ -/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and +/* 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. @@ -19,7 +19,8 @@ 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 +#if defined(__mc68020__) || defined(__mc68030__) || \ + defined(__mc68040__) || defined(__mc68060__) || defined(__mcpu32__) #define umul_ppmm(w1, w0, u, v) \ __asm__ ("mulu%.l %3,%1:%0" \ @@ -28,12 +29,46 @@ Boston, MA 02111-1307, USA. */ : "%0" ((USItype)(u)), \ "dmi" ((USItype)(v))) +#else + +#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 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__))); |