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    • 7. 发明申请
    • MICROPROCESSOR THAT MAKES 64-BIT GENERAL PURPOSE REGISTERS AVAILABLE IN MSR ADDRESS SPACE WHILE OPERATING IN NON-64-BIT MODE
    • 微处理器可在非64位模式下运行的MSR地址空间中提供64位通用寄存器
    • US20130305013A1
    • 2013-11-14
    • US13874838
    • 2013-05-01
    • VIA Technologies, Inc.
    • Mark John Ebersole
    • G06F15/78
    • G06F15/7842G06F9/30076G06F9/30112G06F9/30138G06F9/3017G06F9/30174G06F9/30189G06F9/30196G06F9/4401
    • A microprocessor includes hardware registers that instantiate the IA-32 Architecture EDX and EAX GPRs and hardware registers that instantiate the Intel 64 Architecture R8-R15 GPRs. The microprocessor associates with each of the R8-R15 GPRs a respective unique MSR address. In response to an IA-32 Architecture RDMSR instruction that specifies the respective unique MSR address of one of the R8-R15 GPRs, the microprocessor reads the contents of the hardware register that instantiates the specified one of the R8-R15 GPRs into the hardware registers that instantiate the EDX:EAX registers. In response to an IA-32 Architecture WRMSR instruction that specifies the respective unique MSR address of one of the R8-R15 GPRs, the microprocessor writes into the hardware register that instantiates the specified one of the R8-R15 GPRs the contents of the hardware registers that instantiate the EDX:EAX registers. The microprocessor does so even when operating in non-64-modes.
    • 微处理器包括实例化IA-32架构EDX和EAX GPR的硬件寄存器以及实例化英特尔64架构R8-R15 GPR的硬件寄存器。 微处理器与每个R8-R15 GPR相关联,分别有独特的MSR地址。 为了响应指定R8-R15 GPR之一的相应唯一MSR地址的IA-32架构RDMSR指令,微处理器读取硬件寄存器的内容,该硬件寄存器将R8-R15 GPR中指定的一个实例化到硬件寄存器 实例化EDX:EAX寄存器。 为了响应指定R8-R15 GPR之一的相应唯一MSR地址的IA-32架构WRMSR指令,微处理器写入硬件寄存器,将R8-R15 GPR中指定的一个实例化到硬件寄存器的内容 实例化EDX:EAX寄存器。 即使在非64模式下工作,微处理器也会这样做。