Microprocessor that enables ARM ISA program to access 64-bit general purpose registers written by x86 ISA program

摘要

A microprocessor includes 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. The microprocessor also includes hardware registers that instantiate the ARM Architecture GPRs. In response to an ARM MRRC 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 two of the ARM GPRs registers. In response to an ARM MCRR 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 two of the ARM Architecture GPRs registers. The hardware registers may be shared by the two Architectures.