On Tue, 18 Feb 2014 09:50:55 -0500, Gerhard Postpischil <[email protected]> wrote:
>On 2/18/2014 9:40 AM, Tom Marchant wrote: >> The next instruction would already have been fetched, as well as the >> following instruction. >> How could a macro help the hardware process a new instruction? > >I was positing an instruction that could accommodate various subsequent >instruction lengths. Either the coder would need to know and specify >that length, or else use a macro to have it done under the covers. Ok, I see what you mean about using a macro to generate "Skip the next 4 byte instruction". I still contend that coding the length of the next instruction wouldn't be necessary because the processor would already know the length of the next instruction. It is in the two bits following this instruction. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
