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Partially match m_watch_my_step.c

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Cuyler36
2023-06-15 17:19:42 -04:00
parent 2d9e699c7e
commit fd8fbd9c92
24 changed files with 1223 additions and 33 deletions
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include/MSL_C/w_math.h
+18
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@@ -37,6 +37,24 @@ extern inline float sqrtf(float x)
}
#endif
// hack to get some functions matching where the static const locals are needed
extern inline float sqrtf2(float x)
{
static const double _half=.5;
static const double _three=3.0;
volatile float y;
if(x > 0.0f)
{
double guess = __frsqrte((double)x); // returns an approximation to
guess = _half*guess*(_three - guess*guess*x); // now have 12 sig bits
guess = _half*guess*(_three - guess*guess*x); // now have 24 sig bits
guess = _half*guess*(_three - guess*guess*x); // now have 32 sig bits
y=(float)(x*guess);
return y;
}
return x;
}
extern inline double fabs(double x)
{
return __fabs(x) ;