[libre-riscv-dev] [isa-dev] Re: FP reciprocal sqrt extension proposal

lkcl luke.leighton at gmail.com
Sun Aug 4 07:39:50 BST 2019


okaaay, so that's just done, what i did was to split out the use of funct5 
(when either rs2 or funct3 are "specifiers") and you can see that, 
actually, rs2=00000 is used for FSQRT.X, and it might be better, instead of 
using a new funct5, to just use rs2=00001 for FRSQRT.X

funct3 in both cases is the "rounding mode".


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