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public: mathlib: convert rsqrt to use float_bits_t union

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This commit is contained in:
Alibek Omarov 2023-03-13 03:48:44 +03:00
parent b96bfcfe7a
commit 19a785a98a
1 changed files with 2 additions and 2 deletions
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public/xash3d_mathlib.c
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@ -296,9 +296,9 @@ float rsqrt( float number )
return 0.0f; return 0.0f;
x = number * 0.5f; 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? i = 0x5f3759df - (i >> 1); // what the fuck?
y = *(float *)&i; y = IntAsFloat( i );
y = y * (1.5f - (x * y * y)); // first iteration y = y * (1.5f - (x * y * y)); // first iteration
return y; return y;