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Download RH850 Coding - Renesas Electronics
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CubeSuite+ V2.01.00 CHAPTER 6 FUNCTIONAL SPECIFICATIONS logf Logarithmic function (natural logarithm) [Classification] Mathematical library [Syntax] #include <mathf.h> float logf(float x); [Return value] Returns the natural logarithm of x. logf returns a Not a Nuber(NaN) and sets macro EDOM to global variable errno if x is negative. If x is zero, it returns ∞ and sets macro ERANGE to global variable errno. [Description] This function calculates the natural logarithm of x, i.e., logarithm with base e. R20UT2584EJ0101 Rev.1.01 Sep 01, 2013 Page 621 of 751
