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target/xtensa: only rotate window in the retw helper

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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>
This commit is contained in:
Max Filippov 2019-02-11 12:22:29 -08:00
parent 8df3fd3596
commit c949009bc0
3 changed files with 10 additions and 9 deletions
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2
target/xtensa/helper.h
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@ -7,7 +7,7 @@ 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(retw, 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)