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math: raise flags in log2l.c on <= 0 arguments, and fix volatile
[oweals/musl.git]
/
src
/
complex
/
catanh.c
1
#include "libm.h"
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/* atanh = -i atan(i z) */
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double complex catanh(double complex z)
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{
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z = catan(cpack(-cimag(z), creal(z)));
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return cpack(cimag(z), -creal(z));
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}