diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/m68k/lib/muldi3_mm.c (renamed from arch/m68knommu/lib/ashrdi3.c) | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/arch/m68knommu/lib/ashrdi3.c b/arch/m68k/lib/muldi3_mm.c index 78efb65e315a..be4f275649e3 100644 --- a/arch/m68knommu/lib/ashrdi3.c +++ b/arch/m68k/lib/muldi3_mm.c @@ -1,4 +1,5 @@ -/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */ +/* 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. @@ -20,7 +21,19 @@ Boston, MA 02111-1307, USA. */ #define BITS_PER_UNIT 8 -typedef int SItype __attribute__ ((mode (SI))); +#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__))); @@ -34,30 +47,17 @@ typedef union } DIunion; DItype -__ashrdi3 (DItype u, word_type b) +__muldi3 (DItype u, DItype v) { DIunion w; - word_type bm; - DIunion uu; - - if (b == 0) - return u; - - uu.ll = u; - - bm = (sizeof (SItype) * BITS_PER_UNIT) - b; - if (bm <= 0) - { - /* w.s.high = 1..1 or 0..0 */ - w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1); - w.s.low = uu.s.high >> -bm; - } - else - { - USItype carries = (USItype)uu.s.high << bm; - w.s.high = uu.s.high >> b; - w.s.low = ((USItype)uu.s.low >> b) | carries; - } + 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; } |