diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-01-30 14:56:29 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2019-02-28 04:43:22 -0800 |
| commit | 8df3fd359697d68095c5f1ba47e83e8e237a3055 (patch) | |
| tree | 09dc8ab20422770cee30babaf7caa4c4b024db26 /target/xtensa/helper.h | |
| parent | 45b71a795e5add347f0ba7aba526896132e9b986 (diff) | |
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>
Diffstat (limited to 'target/xtensa/helper.h')
| -rw-r--r-- | target/xtensa/helper.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/target/xtensa/helper.h b/target/xtensa/helper.h index 2a7db35874..b6529a8925 100644 --- a/target/xtensa/helper.h +++ b/target/xtensa/helper.h @@ -3,12 +3,11 @@ DEF_HELPER_3(exception_cause, noreturn, env, i32, i32) DEF_HELPER_4(exception_cause_vaddr, noreturn, env, i32, i32, i32) DEF_HELPER_3(debug_exception, noreturn, env, i32, i32) -DEF_HELPER_2(wsr_windowbase, void, env, i32) +DEF_HELPER_1(sync_windowbase, void, env) DEF_HELPER_4(entry, void, env, i32, i32, i32) DEF_HELPER_2(test_ill_retw, void, env, i32) DEF_HELPER_2(test_underflow_retw, void, env, i32) DEF_HELPER_2(retw, i32, env, i32) -DEF_HELPER_2(rotw, void, env, i32) DEF_HELPER_3(window_check, noreturn, env, i32, i32) DEF_HELPER_1(restore_owb, void, env) DEF_HELPER_2(movsp, void, env, i32) |