On 13 January 2018 at 17:14, Bastian Koppelmann <kbast...@mail.uni-paderborn.de> wrote: > Hi Richard, > > +# Field examples: > +# > +# %disp 0:s16 -- sextract(i, 0, 16) > +# %imm9 16:6 10:3 -- extract(i, 16, 6) << 3 | extract(i, 10, 3) > > startindex:endindex for unnamed_field is more intuitive. As any ISA > manual would specify those.
I find start:len easier to work with personally (and it matches what we use in QEMU for the extract/deposit APIs, and for what little it's worth, what RISU data file syntax does). You're probably right that ISA manuals will tend to give bit positions though. thanks -- PMM
