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48f7170772
Error out if an encoding position is invalid, like an "r" operand matches an "xmmrm" operand. Document the instruction encoding symbols; there are too many of them by now. Add symbols 'n' and 'w' meaning immediates that are supposed to be encoded as if they were 'm' memory addresses and 'v' register numbers, respectively; this is necessary to indicate a validation exception. Remove broken ARPL "memory-like" encoding. It probably never worked anyway. This verification caught two bugs already: - VPMASKMOV[DQ] cannot omit the second operand. - Incorrect operand encoding order for VREDUCESH. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>