target/sparc: Implement STDFQ

Invalid encoding of addr should raise TT_ILL_INSN, so
check before supervisor, which might raise TT_PRIV_INSN.
Clear QNE after execution.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2340
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Carl Hauser <chauser@pullman.com>
2 files changed