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2024-04-09target/sh4: Fix mac.w with saturation enabledZack Buhman
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>