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public: mathlib: convert rsqrt to use float_bits_t union

pull/2/head
Alibek Omarov 2 years ago
parent
commit
19a785a98a
  1. 4
      public/xash3d_mathlib.c

4
public/xash3d_mathlib.c

@ -296,9 +296,9 @@ float rsqrt( float number ) @@ -296,9 +296,9 @@ float rsqrt( float number )
return 0.0f;
x = number * 0.5f;
i = *(int *)&number; // evil floating point bit level hacking
i = FloatAsInt( number ); // evil floating point bit level hacking
i = 0x5f3759df - (i >> 1); // what the fuck?
y = *(float *)&i;
y = IntAsFloat( i );
y = y * (1.5f - (x * y * y)); // first iteration
return y;

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