如何在 Dev C++ 编译器的 C 代码中使用汇编函数？错误：对“__UADD16”的未定义引用

问题描述

我正在使用 Dev C++ 编译器来运行下面的 C 代码。我使用了 _UADD 汇编函数使其更加优化。但是我收到 _UADD 的未定义参考错误。我只有很少的汇编语言背景。我可以使用这个汇编函数 _UADD 来优化我的 C 代码并在 Dev C++ 中编译吗？如果是这样怎么办？

    #include <stdio.h>
    #include <string.h>
    #include <stdlib.h>
    #include <time.h>
    #include <x86intrin.h>
    #include <stdint.h>
    


#ifndef N1_8_H
#define N1_8_H
    
void refined_karatsuba_mul(int16_t* h,const int16_t* f,const int16_t* g,int n);
#endif
    
  static void schoolbook_mul(int16_t* h,int n)
    {
      int16_t result; 
      int i,j;
      for (i = 0; i < n; ++i) {
      result = 0;
      for (j = 0; j <= i; ++j) result = result+f[j]*g[i-j];
      h[i] = result; 
      }
      for (i = n; i < n+n-1; ++i) {
        result = 0;
        for (j = i-n+1; j < n; ++j) result = result+f[j]*g[i-j];
        h[i] = result; 
      }
  
    }
   
      void refined_karatsuba_mul(int16_t* h,int n) {
      const int16_t* f0 = f;
      int16_t f01[n/2];
      const int16_t* f1 = f + n/2;
       const int16_t* g0 = g;
      int16_t g01[n/2];
      const int16_t* g1 = g + n/2;
      uint32_t result;
      for (int i = 0; i < n/2; i+=2) {
        *(int32_t*)(&f01[i]) = __UADD16(*(int32_t*)(&f0[i]),*(int32_t*)(&f1[i])); // f01[i]= f0[i] + f1[i] and f01[i+1]= f0[i+1] + f1[i+1]
        *(int32_t*)(&g01[i]) = __UADD16(*(int32_t*)(&g0[i]),*(int32_t*)(&g1[i])); // g01[i]= g0[i] + g1[i] and g01[i+1]= g0[i+1] + g1[i+1]
      }
    
      int16_t p1[n-1],p2[n-1],p3[n-1];
      schoolbook_mul(p1,f0,g0,n/2);
      schoolbook_mul(p2,f01,g01,n/2);
      schoolbook_mul(p3,f1,g1,n/2);
    

      for(int i = 0; i < n-1; i++) {
        h[i] += p1[i];
        h[i+n/2] += p2[i] - p1[i] - p3[i];
        h[i+n] += p3[i];
      }
    }
   
int main(){


    int16_t *f = malloc(8*sizeof(int16_t));
    int16_t *g = malloc(8*sizeof(int16_t));
    int16_t *h= calloc((2*8-1),sizeof(int16_t));

     int i;
////////////////////////reading f and g 
    FILE *myFile;
    myFile = fopen("inp8test","r");
    if (myFile == NULL){
        printf("Error Reading File\n");
        exit (0);}

    for (i = 0; i < 8; i++){
        fscanf(myFile,"%d",&f[i]);
        f[i] = 0;
    }
    
    for (i = 0; i < 8; i++){
        fscanf(myFile,&g[i] );
        g[i] = 0;
    }
    fclose(myFile);
    

        unsigned long long   LastCycleCount = _rdtsc();
        clock_t start = clock ();        
    for (i=0;i<999;i++){
        
    refined_karatsuba_mul(h,f,g,8);
        memset(h,sizeof(int16_t)*(2*8-1));
        }
        refined_karatsuba_mul(h,8);
        unsigned long long   EndCycleCount = _rdtsc();
        unsigned long long   CyclesElapsed = EndCycleCount - LastCycleCount;
        CyclesElapsed = CyclesElapsed/1000 ;
   
        double Timelapsed=(clock()-start)/(double) CLOCKS_PER_SEC;
        Timelapsed=Timelapsed/1000;
 /////////////////////////////////////////////write on c_n1_8 file  
    FILE *outFile;
    outFile = fopen("c_n1_8","w");
    if (outFile == NULL)
    {
        printf("Cannot Open File\n");
        exit (0);
    }
    
   for (i = 0; i < 2*8-1; i++)
        fprintf(outFile,"%d ",((h[i])%3+3)%3 );
        
    fclose(outFile);
/////////////////////////////////////////////////////////////printing on console
    for( i=0; i<2*8-1; i++)
        printf("%d ",((h[i])%3+3)%3);
    printf("\n\n\n");
    printf("Cycles: %llu\n",CyclesElapsed);
    printf("Multiplication Time:");
    printf( "%f",Timelapsed);
    printf("sec");
    printf("\n \n ");

    free(f);
    free(g);
    free(h);

    return 0;
}

解决方法

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