[Libre-soc-isa] [Bug 532] discuss iterative approach for statistical analysis of effectiveness of Compressed PowerISA encoding

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Sat Nov 28 23:27:37 GMT 2020


--- Comment #16 from Alexandre Oliva <oliva at gnu.org> ---
Created attachment 122
  --> https://bugs.libre-soc.org/attachment.cgi?id=122&action=edit
python script skeleton to estimate compression for a given insn selection

This script is a skeleton to experiment with the selection of insns for
compressed encoding, so far only supporting the 8-bit nop switching, just
because I thought it was easier to model.  

Next, I'll improve/rewrite mode switching and selection insns to use 10-bit
maybe-switch insns, and 16-bit insns that switch out of compressed mode for 1
or n insns, or remain in compressed mode with or without an extra 16-bit
immediate.  Wish me luck ;-)

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