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authorRich Felker <dalias@aerifal.cx>2012-03-19 21:55:53 -0400
committerRich Felker <dalias@aerifal.cx>2012-03-19 21:55:53 -0400
commitacb744921b73f5a73803e533e5e4a4896d164a26 (patch)
tree2cdfcd2dc29d4d3041af99958215871ae5c900b6 /src/math/acoshf.c
parent01084202815fefbb7db23825d8b11a570c455e13 (diff)
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fix exp asm
exponents (base 2) near 16383 were broken due to (1) wrong cutoff, and
(2) inability to fit the necessary range of scalings into a long
double value.

as a solution, we fall back to using frndint/fscale for insanely large
exponents, and also have to special-case infinities here to avoid
inf-inf generating nan.

thankfully the costly code never runs in normal usage cases.
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