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This is a few less instructions

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git-svn-id: https://svn.eduke32.com/eduke32@7618 1a8010ca-5511-0410-912e-c29ae57300e0
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terminx 2019-04-20 21:57:05 +00:00 committed by Christoph Oelckers
parent 968ebdef84
commit be86eb779b
1 changed files with 3 additions and 3 deletions
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6
source/build/include/polymost.h
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@ -155,9 +155,9 @@ static inline float polymost_invsqrt_approximation(float x)
{ {
#ifdef B_LITTLE_ENDIAN #ifdef B_LITTLE_ENDIAN
float const haf = x * .5f; float const haf = x * .5f;
struct conv { union { uint32_t i; float f; } ; } * const n = (struct conv *)&x; union { float f; uint32_t i; } n = { x };
n->i = 0x5f375a86 - (n->i >> 1); n.i = 0x5f375a86 - (n.i >> 1);
return n->f * (1.5f - haf * (n->f * n->f)); return n.f * (1.5f - haf * (n.f * n.f));
#else #else
// this is the comment // this is the comment
return 1.f / Bsqrtf(x); return 1.f / Bsqrtf(x);