I found this.

Has this anything to do with the library the Teensy 3.6 uses?

Code:

double cos (double __x)
double sin (double __x)
double tan (double __x)
double fabs (double __x)
double fmod (double __x, double __y)
double modf (double __x, double *__iptr)
float modff (float __x, float *__iptr)
double sqrt (double __x)
float sqrtf (float)
double cbrt (double __x)
double hypot (double __x, double __y)
double square (double __x)
double floor (double __x)
double ceil (double __x)
double frexp (double __x, int *__pexp)
double ldexp (double __x, int __exp)
double exp (double __x)
double cosh (double __x)
double sinh (double __x)
double tanh (double __x)
double acos (double __x)
double asin (double __x)
double atan (double __x)
double atan2 (double __y, double __x)
double log (double __x)
double log10 (double __x)
double pow (double __x, double __y)
int isnan (double __x)
int isinf (double __x)
static int isfinite (double __x)
static double copysign (double __x, double __y)
int signbit (double __x)
double fdim (double __x, double __y)
double fma (double __x, double __y, double __z)
double fmax (double __x, double __y)
double fmin (double __x, double __y)
double trunc (double __x)
double round (double __x)
long lround (double __x)
long lrint (double __x)

Can I expect all these functions to work with the suffix f on 32 bit floats using the FPU?

Sorry in case my question is entirely stupid. I really have no clue where and how I could find the information myself.

Is the answer so obvious to anyone that I sound like a troll? I assure this is not my intention.