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* math: define _GNU_SOURCE when implementing non-standard math functionsSzabolcs Nagy2013-12-121-0/+1
| | | | | this makes the prototypes in math.h are visible so they are checked agaist the function definitions
* math: sin cos cleanupSzabolcs Nagy2013-05-181-21/+24
| | | | | | | | * use unsigned arithmetics * use unsigned to store arg reduction quotient (so n&3 is understood) * remove z=0.0 variables, use literal 0 * raise underflow and inexact exceptions properly when x is small * fix spurious underflow in tanl
* fix trailing whitespace issues that crept in here and thereRich Felker2012-12-071-1/+1
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* efficient sincos based on sin and cosnsz2012-03-151-0/+113