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With the floating-point extension facility - CONVERT FROM LOGICAL - CONVERT TO LOGICAL - CONVERT TO FIXED - CONVERT FROM FIXED - LOAD FP INTEGER have both, a rounding mode specification and the inexact-exception control (XxC). Other instructions will be handled separatly. Check for valid rounding modes and forward also the XxC (via m4). To avoid a lot of boilerplate code and changes to the helpers, combine both, the m3 and m4 field in a combined 32 bit TCG variable. Perform checks at a central place, taking in account if the m3 or m4 field was ignore before the floating-point extension facility was introduced. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20190218122710.23639-13-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>