mirror of
https://github.com/TwilitRealm/dusklight
synced 2026-07-21 20:54:43 -04:00
Luke Street
9649319ec4
* Reorganize files into libs/{dolphin,JSystem,PowerPC_EABI_Support,revolution,TRK_MINNOW_DOLPHIN}
* Update configure.py and project.py for new libs structure
* Refactor `#include <dolphin/x.h>` -> `<x.h>`
* Remove `__REVOLUTION_SDK__` forwards from dolphin
* Fix dolphin/ references in revolution
* Wrap `#include <dolphin.h>` in `!__REVOLUTION_SDK__`
* Always build TRK against dolphin headers
* Resolve revolution SDK header resolution issues
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
// fake MSL_C math for sdk specifically since it differs from game MSL_C math
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extern inline float sqrtf(float x) {
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static const double _half=.5;
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static const double _three=3.0;
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volatile float y;
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if(x > 0.0f) {
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double guess = __frsqrte((double)x); // returns an approximation to
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guess = _half*guess*(_three - guess*guess*x); // now have 12 sig bits
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guess = _half*guess*(_three - guess*guess*x); // now have 24 sig bits
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guess = _half*guess*(_three - guess*guess*x); // now have 32 sig bits
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y=(float)(x*guess);
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return y ;
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}
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return x ;
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}
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extern inline float sqrt(float x) {
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static const double _half=.5;
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static const double _three=3.0;
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volatile float y;
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if(x > 0.0f) {
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double guess = __frsqrte((double)x); // returns an approximation to
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guess = _half*guess*(_three - guess*guess*x); // now have 12 sig bits
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guess = _half*guess*(_three - guess*guess*x); // now have 24 sig bits
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guess = _half*guess*(_three - guess*guess*x); // now have 32 sig bits
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guess = _half*guess*(_three - guess*guess*x); // now have 32 sig bits
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y=(float)(x*guess);
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return y ;
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}
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return x ;
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}
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extern inline float fabs(float x) {
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#if __MIPS__
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return fabsf(x);
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#else
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(*(int*)&x)&=0x7fffffff;
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return x;
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#endif
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}
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extern inline float fabsf(float x) {
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return __fabsf(x);
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}
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extern float cosf(float);
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extern float sinf(float);
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extern float tanf(float);
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extern float acosf(float);
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extern inline float cos(float x) {
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return cosf(x);
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}
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inline float floor(float x) {
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int i=(int)x;
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float y=x-(float)i;
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if(!y || x > 8388608.0f)
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return x ; // x is already an int
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if(x < 0)
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return (float)--i;
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// x < 0 -> int conversion of x above rounded toward zero(so decrement)
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return (float)i;
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}
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