target-xtensa: implement accurate window check (772177c1) · Commits · Anton / libtcg

Commit 772177c1 authored 13 years ago by Max Filippov Committed by Blue Swirl 13 years ago

target-xtensa: implement accurate window check


See ISA, 4.7.1.3 for details.

Window check is inserted before commands that push "used register
watermark" beyond its current level. Used register watermark is reset on
instructions that change WINDOW_BASE/WINDOW_START SRs.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>