[libre-riscv-dev] [Bug 74] preliminary exploratory software emulation of FP SQRT

bugzilla-daemon at libre-riscv.org bugzilla-daemon at libre-riscv.org
Sun Apr 28 10:53:00 BST 2019


--- Comment #11 from Aleksandar Kostovic <alexandar.kostovic at gmail.com> ---
I pushed the commit of the python code of the previous C version of SQRT
function found in that paper. BUT it doesnt work yet, as i had to init a
variable with no value(it was done like that in c version) so now python trows
an error because of it. also i commented the old version so there exists a
"vorking version" of sqrt function.

  File "/home/aleksandar/projects/ieee754fpu/src/add/fsqrt.py", line 28, in
    R = (R<<2)|((D>>(i+i))&3)
TypeError: unsupported operand type(s) for >>: 'NoneType' and 'int'

Any ideas on how to fix this are welcome.

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