target/arm: Split decode of BFloat SVE FADD, FSUB, FMUL, FMIN*, FMAX*

Split decode so that feature detection can be handled
external to gen_gvec_fpst_arg_zpzz

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20260826174213.614571-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 files changed