tree 3455592898896a575edcdb25887238e0225c36ee
parent b994e91b00cce463bfd306482dfe21630e11bf68
author Max Filippov <jcmvbkbc@gmail.com> 1315266949 +0400
committer Blue Swirl <blauwirbel@gmail.com> 1315673859 +0000

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>