target/arm: Introduce gen_gvec_sshr, gen_gvec_ushr

Handle the two special cases within these new
functions instead of higher in the call stack.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240912024114.1097832-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
4 files changed