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2018-09-20lib/libm_dbl: Add implementation of copysign() for DEBUG builds.Andrew Leech
This provides a double variant of the float copysignf from libm/math.c which is required for DEBUG=1 builds when MICROPY_FLOAT_IMPL=double
2018-09-04lib/libm_dbl/tanh: Make tanh more efficient and handle large numbers.Damien George
Prior to this patch tanh(large number) would return nan due to inf/inf.
2017-06-28lib: Add libm_dbl, a double-precision math library, from musl-1.1.16.Damien George