CrossWorks for ARM User Guide

log10Synopsis#include double log10(double x);Description log10 computes the base-10 logarithm of x.Fast math librarybehaviorIEC 60559 mathlibrary behaviorPortabilityIf x = 0, errno is set to ERANGE and log10 returns -HUGE_VAL.If x < 0, errno is set to EDOM and log10 returns -HUGE_VAL.If x < 0 or x = -Infinity, log10 returns NaN with signal.If x = 0, log10 returns -Infinity with signal.If x = Infinity, log10 returns Infinity.If x = NaN, log10 returns x with no signal.log10 conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).log10fSynopsis#include float log10f(float x);Description log10f computes the base-10 logarithm of x.Fast math librarybehaviorIEC 60559 mathlibrary behaviorPortabilityIf x = 0, errno is set to ERANGE and log10f returns -HUGE_VALF.If x < 0, errno is set to EDOM and log10f returns -HUGE_VALF.If x < 0 or x = -Infinity, log10f returns NaN with signal.If x = 0, log10f returns -Infinity with signal.If x = Infinity, log10f returns Infinity.If x = NaN, log10f returns x with no signal.log10f conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).logfSynopsis#include float logf(float x);Description logf computes the base-e logarithm of x.Fast math librarybehaviorIf x = 0, errno is set to ERANGE and logf returns -HUGE_VALF.If x < 0, errno is set to EDOM and logf returns -HUGE_VALF.Chapter 28 - Mathematics269