64 bit instruction set

Discussion in 'OT Technology' started by RiKuN, Jan 25, 2007.

  1. RiKuN

    RiKuN New Member

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    Say, for example, there's an instruction set similar to minimips. But instead of having 32bit registers, you have 64 bits. Does this mean that each register field is doubled? For example, instead of the opcode being 6 bits, it is now 12 bits, and so on.
     
  2. TheDarkHorizon

    TheDarkHorizon \xC0\xFF\xEE

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    This sounds awfully like a homework problem, but I'll shoot anyways. Unless there are more registers added, what need is there to increase the number of bits to choose a register in an instruction? I know it's a RISC architecture, but I'm pretty sure they won't be getting close to 2^12 registers anytime soon. Not only that, but that would totally kill any backwards compatibility with binaries based on the 32-bit instruction set.
     

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