- 根目录:
- arch
- m68k
- lib
- muldi3_mm.c
#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;
}
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