[libre-riscv-dev] [Bug 117] RISCV FCLASS instruction needed

[bugzilla-daemon at libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=117

--- Comment #5 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
https://stackoverflow.com/questions/8341395/what-is-a-subnormal-floating-point-number

N126 already exists which if exp is -126 (N126), that means num is subnormal.

http://git.libre-riscv.org/?p=ieee754fpu.git;a=blob;f=src/ieee754/fpcommon/fpbase.py;h=5f7df717e374719c0b8b1ec1c2eee13feda427f0;hb=refs/heads/master#l321

Pffh. It should be dirt simple, this one. FPBase has all the tests already, and
they are used in specialcases a *lot*.

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