On Thu, 7 Mar 2019 at 14:47, Richard Henderson <richard.hender...@linaro.org> wrote: > > This will let backends implement the double-word shift operation. > > Signed-off-by: Richard Henderson <richard.hender...@linaro.org> > diff --git a/tcg/README b/tcg/README > index 603f4df659..ddabf33017 100644 > --- a/tcg/README > +++ b/tcg/README > @@ -343,6 +343,11 @@ at bit 8. This operation would be equivalent to > > (using an arithmetic right shift). > > +* extract2_i64 dest, t1, t2, pos > + > +Extract a 64-bit quantity from the concatenation of t2:t1, > +beginning at pos. > +
I think we should document the valid values of 'pos'. My guess is "0 <= pos <= 63". thanks -- PMM
