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Finish matching hsfman.c

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This commit is contained in:
gamemasterplc 2023-12-27 14:31:16 -06:00
parent 2a3ff68d7f
commit bf5db9fe8d
3 changed files with 25 additions and 11 deletions
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18
include/math.h
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@ -3,6 +3,7 @@
#define M_PI 3.141592653589793
#ifdef MATH_EXPORT_CONST
extern inline float sqrtf(float x)
{
static const double _half=.5;
@ -19,7 +20,22 @@ extern inline float sqrtf(float x)
}
return x;
}
#else
extern inline float sqrtf(float x)
{
volatile float y;
if(x > 0.0f)
{
double guess = __frsqrte((double)x); // returns an approximation to
guess = 0.5*guess*(3.0 - guess*guess*x); // now have 12 sig bits
guess = 0.5*guess*(3.0 - guess*guess*x); // now have 24 sig bits
guess = 0.5*guess*(3.0 - guess*guess*x); // now have 32 sig bits
y=(float)(x*guess);
return y;
}
return x;
}
#endif
double atan(double x);
double copysign(double x, double y);
double cos(double x);