Power Architecture Study Notes

richiefang

Power Architecture Study Notes [复制链接]

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PPC function category:
1. Interger (Fixed-point) Facility, using 32 GPRs(General Purpose Registers), each register have 32/64 bits for different mode.
2. Floating-point Facility, using 32 FPRs (Floating-point Registers), each register have 64 bits.
3. Vector/Vector Scalar Facility, using 32 128bits VRs and 64 128bits VSXs.
4. DSP Facility, using GPRS.


A funny feature: the instrution 0x0 would always be considered as illeagel instruction, and cause a exception. It's designed for avoid process data as instruction by mistake.
[ 本帖最后由 richiefang 于 2010-7-27 21:41 编辑 ]

zhdphao

PPC是否长在网络处理能力上？

richiefang

网络处理器我更看好MIPS

richiefang

PPC data access units:
Bytes: 8 bit
Halfwords: 16 bit
Words: 32 bit
Doublewords: 64 bit
Quadwords: 128 bit

zhdphao

和VC++比，多了Halfwords和Quadwords。
    VC++:
        Bytes: 8 bit
        WORD: 16 bit
        DWORD: 32 bit
        __int64: 64 bit
       128 bit  ？