I'm pretty sure it's not faster, but it was fun to write:

    float asin(float x) {
      float x2 = 1.0f-fabs(x);
      u32 i = bitcast(x2);
      i = 0x5f3759df - (i>>1);
      float inv = bitcast(i);
      return copysign(pi/2-pi/2*(x2*inv),x);
    }

Courtesy of evil floating point bithacks.

▲ jacquesm 5 hours ago | parent | next [-]

That could do with some subtitles.

	▲	irishcoffee 4 hours ago \| parent [-]
		https://en.wikipedia.org/wiki/Fast_inverse_square_root

▲ def-pri-pub 6 hours ago | parent | prev | next [-]

> floating point bithacks

The forbidden magic

▲ chuckadams 6 hours ago | parent | prev | next [-]

You brought Zalgo. I blame this decade on you.

▲ moffkalast 6 hours ago | parent | prev | next [-]

> float asinine(float x) {

FTFY :P

▲ adampunk 6 hours ago | parent | prev [-]

// what the fuck