Skip to content
Snippets Groups Projects
softfloat.c 1.16 KiB
Newer Older
  • Learn to ignore specific revisions
  • #include <inttypes.h>
    #include <stdio.h>
    #include <assert.h>
    #include "softfloat.h"
    #include "common.h"
    #include "log.h"
    
    #undef printf
    
    int main(){
        SoftFloat one= av_int2sf(1, 0);
        SoftFloat sf1, sf2;
        double d1, d2;
        int i, j;
    av_log_level = AV_LOG_DEBUG;
    
        d1= 1;
        for(i= 0; i<10; i++){
            d1= 1/(d1+1);
        }
        printf("test1 double=%d\n", (int)(d1 * (1<<24)));
    
        sf1= one;
        for(i= 0; i<10; i++){
            sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
        }
        printf("test1 sf    =%d\n", av_sf2int(sf1, 24));
    
    
        for(i= 0; i<100; i++){
            START_TIMER
            d1= i;
            d2= i/100.0;
            for(j= 0; j<1000; j++){
                d1= (d1+1)*d2;
            }
            STOP_TIMER("float add mul")
        }
        printf("test2 double=%d\n", (int)(d1 * (1<<24)));
    
        for(i= 0; i<100; i++){
            START_TIMER
            sf1= av_int2sf(i, 0);
            sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
            for(j= 0; j<1000; j++){
                sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
            }
            STOP_TIMER("softfloat add mul")
        }
        printf("test2 sf    =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
        return 0;
    }