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

bugzilla-daemon at libre-riscv.org bugzilla-daemon at libre-riscv.org
Fri Jul 26 23:01:06 BST 2019


--- Comment #3 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
Found section.

rd bit Meaning 
0 rs1 is ∞. 
1 rs1 is a negative normal number. 
2 rs1 is a negative subnormal number. 
3 rs1 is 0. 
4 rs1 is +0. 
5 rs1 is a positive subnormal number. 
6 rs1 is a positive normal number. 
7 rs1 is +∞. 
8 rs1 is a signaling NaN. 
9 rs1 is a quiet NaN.
Table 8.5

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