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* math: fix x86 expl.s to raise underflow and clean up special case handlingSzabolcs Nagy2013-08-151-23/+16
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* math: x86_64 version of expl, fixed some comments in the i386 versionSzabolcs Nagy2012-12-161-2/+2
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* math: fix i386/expl.s with more precise x*log2eSzabolcs Nagy2012-12-141-1/+107
| | | | | | | | | with naive exp2l(x*log2e) the last 12bits of the result was incorrect for x with large absolute value with hi + lo = x*log2e is caluclated to 128 bits precision and then expl(x) = exp2l(hi) + exp2l(hi) * f2xm1(lo) this gives <1.5ulp measured error everywhere in nearest rounding mode
* asm exponential functions for i386Rich Felker2012-03-181-0/+1