mrmuldv.cpp

来自「关于大数运算的加 减 乘 除 模 等运算 运用了libtommath库的算法」· C++ 代码 · 共 62 行

/*
 *  Borland C++ 32-bit compiler (BCC32). Use with mirdef.h32 
 *  Uses inline assembly feature. Suitable for Win32 Apps
 *  Also compatible with Microsoft Visual C++ 32-bit compiler
 */

#include "inner_support.h"

int muldiv(int a, int b,int c,int m,int *rp)
{
    __asm{
         mov   eax,DWORD PTR a      
         mul   DWORD PTR b          
         add   eax,DWORD PTR c      
         adc   edx,0h                 
         div   DWORD PTR m          
         mov   ebx,DWORD PTR rp     
         mov   [ebx],edx   
    }
}

int muldvm(int a,int c,int m,int *rp)
{
     __asm{
         mov   edx,DWORD PTR a      
         mov   eax,DWORD PTR c      
         div   DWORD PTR m          
         mov   ebx,DWORD PTR rp     
         mov   [ebx],edx   
     }
}

int muldvd(int a,int b,int c,int *rp)
{
    __asm{
         mov   eax,DWORD PTR a      
         mul   DWORD PTR b          
         add   eax,DWORD PTR c      
         adc   edx,0h                 
         mov   ebx,DWORD PTR rp     
         mov   [ebx],eax              
         mov   eax,edx
    }
}

void muldvd2(int a, int b,int *c,int *rp)
{
    __asm{
         mov   eax,DWORD PTR a      
         mul   DWORD PTR b          
         mov   ebx,DWORD PTR c
         add   eax,[ebx]
         adc   edx,0h
         mov   esi,DWORD PTR rp
         add   eax,[esi]
         adc   edx,0h
         mov   [esi],eax              
         mov   [ebx],edx
    }
}