libc-top-half/musl/src/math/i386/sqrtf.c

   1 #include <math.h>
   2
   3 float sqrtf(float x)
   4 {
   5         long double t;
   6         /* The long double result has sufficient precision so that
   7          * second rounding to float still keeps the returned value
   8          * correctly rounded, see Pierre Roux, "Innocuous Double
   9          * Rounding of Basic Arithmetic Operations". */
  10         __asm__ ("fsqrt" : "=t"(t) : "0"(x));
  11         return (float)t;
  12 }