R 在 RAX、RBX、RCX、RDX、RSI、RDI、RBP、RSP 中代表什么? [英] What does the R stand for in RAX, RBX, RCX, RDX, RSI, RDI, RBP, RSP?

问题描述

x86 汇编语言不得不改变，因为 x86 处理器架构已经从 8 位变为 16 位，再到 32 位和现在的 64 位.

The x86 assembler language has had to change as the x86 processor architecture has changed from 8bit to 16bit to 32bit and now 64bit.

我知道在 32 位汇编寄存器名称(EAX、EBX 等)中，每个名称的前缀 E 代表 Extended 表示寄存器的 32 位形式而不是 16 位形式(AX、BX 等).).

I know that in 32bit assembler register names (EAX, EBX, etc.), the E prefix for each of the names stands for Extended meaning the 32bit form of the register rather than the 16bit form (AX, BX, etc.).

这些寄存器名称的 R 前缀在 64 位中代表什么?

What does the R prefix for these register names stand for in 64bit?

推荐答案

我认为它只是 R 代表寄存器"，因为在 x86-64 上还有额外的寄存器 R8 - R15，而 R 是许多 CPU 架构的通用前缀寄存器编号的位置.

I think it's just R for "register", since there are additional registers R8 - R15 on x86-64, and R is a common prefix on many CPU architectures where registers are numbered.

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