它还规定在存储设备与一组32位矢量寄存器(Vector Register,VR)之间存取和储存的字节、半字、字和四字操作数。

It also provides for byte, halfword, word, and quadword operand fetches and stores between storage and a set of 32 Vector Registers (VRs).

youdao

双%%前缀，指明这是一个寄存器名。单%指明操作数。 这帮组GCC辨别操作数和寄存器。

There are two %'s prefixed to the register name. This helps GCC to distinguish between the operands and registers. operands have a single % as prefix.

youdao

双%%前缀，指明这是一个寄存器名。单%指明操作数。 这帮组GCC辨别操作数和寄存器。

There are two %'s prefixed to the register name. This helps GCC to distinguish between the operands and registers. operands have a single % as prefix.

youdao