2.732.732.73
int saturating_add(int x,int y){
unsigned int tot=x+y;
int len=(sizeof(int)<<3)-1;
unsigned int flag=!((((x>>len)^(y>>len))&1) | !(((x>>len)^(tot>>len))&1));
flag=~flag+1;
x=x>>len;
printf("%x\n",(tot|flag)-(flag&((unsigned int)x^(1<<len))));
}
2.932.932.93
typedef unsigned float_bits;
float_bits float_absval(float_bits f){
int len=(sizeof(int)<<3)-1;
float_bits o=(1<<len)&f;
float_bits a=(-1)<<24;
float_bits b=(a&(f<<1));
float_bits c=!(a^b);
float_bits d=!(!(f<<9));
float_bits flag=c&d;
o=(flag<<len)&o;
f=(~(1<<len))&f;
printf("%x\n",f|o);
}
2.972.972.97
typedef unsigned float_bits;
float_bits float_i2f(int i){
if(!i) return (float_bits)0;
int len=(sizeof(int)<<3)-1;
float_bits o=(1<<len)&(float_bits)i;
float_bits num=(~(1<<len))&(float_bits)i;
if(o) num=o-num;
int dest=31;
float_bits ans=0,e=0;
while(!((1<<dest)&num)) --dest;
if(dest>23&&(num&1<<(dest-23))) num+=(1<<(dest-24));
dest=31;while(!((1<<dest)&num)) --dest;
ans=(float_bits)num&(~(1<<dest));
if(dest>23) ans=ans>>(dest-23);
else ans=ans<<(23-dest);
e=127+dest;
ans|=(e<<23);
if(o) ans|=(1<<len);
return ans;
}
}