3 Commits

Author	SHA1	Message	Date
Max Filippov	c949009bc0	target/xtensa: only rotate window in the retw helper ... Move return address calculation and WINDOW_START adjustment out of the retw helper to simplify logic a bit and avoid using registers directly. Pass a0 as a parameter to the helper. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>	2019-02-28 04:43:22 -08:00
Max Filippov	8df3fd3596	target/xtensa: move WINDOW_BASE SR update to postprocessing ... Opcodes that modify WINDOW_BASE SR don't have dependency on opcodes that use windowed registers. If such opcodes are combined in a single instruction they may not be correctly ordered. Instead of adding said dependency use temporary register to store changed WINDOW_BASE value and do actual register window rotation as a postprocessing step. Not all opcodes that change WINDOW_BASE need this: retw, rfwo and rfwu are also jump opcodes, so they are guaranteed to be translated last and thus will not affect other opcodes in the same instruction. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>	2019-02-28 04:43:22 -08:00
Max Filippov	c9ed50e82d	target/xtensa: extract windowed registers helpers ... Move helper functions related to register windows from op_helper.c to win_helper.c. No functional changes. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>	2019-01-13 23:34:30 -08:00