muldi3.c File Reference

#include <linux/module.h>
#include "libgcc.h"

Go to the source code of this file.

Macros
#define	DWtype   long long
#define	UWtype   unsigned long
#define	UHWtype   unsigned short
#define	W_TYPE_SIZE   32
#define	__ll_B   ((UWtype) 1 << (W_TYPE_SIZE / 2))
#define	__ll_lowpart(t)   ((UWtype) (t) & (__ll_B - 1))
#define	__ll_highpart(t)   ((UWtype) (t) >> (W_TYPE_SIZE / 2))
#define	umul_ppmm(w1, w0, u, v)
#define	__umulsidi3(u, v)

Functions
DWtype	__muldi3 (DWtype u, DWtype v)
	EXPORT_SYMBOL (__muldi3)

Macro Definition Documentation

#define __ll_B   ((UWtype) 1 << (W_TYPE_SIZE / 2))

Definition at line 11 of file muldi3.c.

#define __ll_highpart

(

t

)

((UWtype) (t) >> (W_TYPE_SIZE / 2))

Definition at line 13 of file muldi3.c.

#define __ll_lowpart

(

t

)

((UWtype) (t) & (__ll_B - 1))

Definition at line 12 of file muldi3.c.

#define __umulsidi3	(		u,
			v
	)

Value:

({              \
	DWunion __w;                   \
    umul_ppmm(__w.s.high, __w.s.low, u, v);     \
    __w.ll;                     \
    })

Definition at line 43 of file muldi3.c.

#define DWtype   long long

Definition at line 5 of file muldi3.c.

#define UHWtype   unsigned short

Definition at line 7 of file muldi3.c.

#define umul_ppmm	(		w1,
			w0,
			u,
			v
	)

Value:

do {                                \
		UWtype __x0, __x1, __x2, __x3;                \
		UHWtype __ul, __vl, __uh, __vh;               \
                                    \
        __ul = __ll_lowpart(u);                 \
        __uh = __ll_highpart(u);                \
        __vl = __ll_lowpart(v);                 \
        __vh = __ll_highpart(v);                \
                                    \
        __x0 = (UWtype) __ul * __vl;                \
        __x1 = (UWtype) __ul * __vh;                \
        __x2 = (UWtype) __uh * __vl;                \
        __x3 = (UWtype) __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)

Definition at line 17 of file muldi3.c.

#define UWtype   unsigned long

Definition at line 6 of file muldi3.c.

#define W_TYPE_SIZE   32

Definition at line 9 of file muldi3.c.

Function Documentation

DWtype __muldi3	(	DWtype	u,
		DWtype	v
	)

Definition at line 50 of file muldi3.c.

EXPORT_SYMBOL

(

__muldi3

)