首页>
外国专利>
Address size and operand size prefix overrides for default sizes defined by an operating mode of a processor
Address size and operand size prefix overrides for default sizes defined by an operating mode of a processor
展开▼
机译:地址大小和操作数大小前缀会覆盖由处理器的操作模式定义的默认大小
展开▼
页面导航
摘要
著录项
相似文献
摘要
A processor supports a processing mode in which the default address size is greater than 32 bits and the default operand size is 32 bits. The default address size may be nominally indicated as 64 bits, although various embodiments of the processor may implement any address size which exceeds 32 bits, up to and including 64 bits, in the processing mode. The processing mode may be established by placing an enable indication in a control register into an enabled state and by setting a first operating mode indication and a second operating mode indication in a segment descriptor to predefined states. Additionally, an instruction prefix may be coded into an instruction to override the default address and/or operand size. Thus, an address size of 32 bits may be used when desired, and an operand size of 64 bits may be used when desired.
展开▼