... eight-bit address register 八位地址寄存器 VBR Valid Bit Register 有效位寄存器 eight-bit register 八位寄存器 ...
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在两种模式下,有效地址计算将使用所有64位相关寄存器(GPR、LR、CTR等)并生成64位结果。
In both modes, effective address computations use all 64 bits of the relevant registers (GPRs, LRs, CTRs, etc.) and produce a 64-bit result.
在这种情况下,有效地址总是分为两个32位的寄存器;高位寄存器是可选的,如果没有指定,就会被当作零进行处理。
The effective address is, under the hood, always split into a pair of 32-bit registers; the high-order register is optional and if it's not specified, it is treated as zero.
为了解决这一问题,乘法指令只使用每个 32 位的最低有效的 16 位以便结果能够放进整个 32 位寄存器内。
To combat the problem, multiplication instructions only use the least-significant 16 bits of every 32-bit value so that the result will fit in the full 32-bit register.
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