Il 07/05/2014 14:32, Nadav Amit ha scritto:
32-bit operations are zero extended in 64-bit mode. Currently, the code does not handle them correctly and keeps the high bits. In 16-bit mode, the high 32-bits are kept intact. In addition, although it is not well-documented, when address override prefix is used with REP-string instruction, RCX high half is zeroed even if ECX was zero on the first iteration (as if an assignment was performed to ECX).
Is this true even for REPZ and ZF=0 or REPNZ and ZF=1? Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
