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target/sh4: Fix mac.w with saturation enabled

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The saturation arithmetic logic in helper_macw is not correct.
I tested and verified this behavior on a SH7091.

Reviewd-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Zack Buhman <zack@buhman.org>
Message-Id: <20240405233802.29128-3-zack@buhman.org>
[rth: Reformat helper_macw, add a test case.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Zack Buhman 2024-04-05 17:11:47 -10:00 • committed by Richard Henderson
parent c97e8977dc
commit 7227c0cd50
4 changed files with 82 additions and 12 deletions
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2
target/sh4/helper.h
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@ -12,7 +12,7 @@ DEF_HELPER_1(discard_movcal_backup, void, env)
DEF_HELPER_2(ocbi, void, env, i32)
DEF_HELPER_3(macl, void, env, s32, s32)
DEF_HELPER_3(macw, void, env, i32, i32)
DEF_HELPER_3(macw, void, env, s32, s32)
DEF_HELPER_2(ld_fpscr, void, env, i32)