xref: /minix3/minix/lib/libsys/sqrt_approx.c (revision 433d6423c39e34ec4b79c950597bb2d236f886be) 
1*433d6423SLionel Sambuc #include <minix/sysutil.h>
2*433d6423SLionel Sambuc 
sqrt_approx(u32_t in)3*433d6423SLionel Sambuc u32_t sqrt_approx(u32_t in)
4*433d6423SLionel Sambuc {
5*433d6423SLionel Sambuc         int b, v = 0;
6*433d6423SLionel Sambuc         for(b = (sizeof(in)*8)/2-1; b >= 0; b--) {
7*433d6423SLionel Sambuc                 u32_t n = v | (1UL << b);
8*433d6423SLionel Sambuc                 if(n*n <= in)
9*433d6423SLionel Sambuc                         v = n;
10*433d6423SLionel Sambuc         }
11*433d6423SLionel Sambuc 
12*433d6423SLionel Sambuc         return v;
13*433d6423SLionel Sambuc }
14*433d6423SLionel Sambuc 
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