On 2022-04-16 02:23, Tom Harper wrote:
On Apr 15, 2022, at 12:20 PM, Robin Vowels <[email protected]>
wrote:
On 2022-04-16 00:25, Tom Harper wrote:
Well known. But the instruction I’m proposing has no registers
involved
Oh? How do you propose that such an instruction move
N bytes (where N is variable) without the value of N
being in a register?
As mentioned, R0.
Make up your mind! You just said that no registers were involved.
(other than base displacement) and thus there is no way to
restart the instruction to complete the process.
So to avoid that, limiting it to 256 bytes removed that as an issue.
On Apr 15, 2022, at 9:45 AM, Seymour J Metz <[email protected]> wrote:
You can have interruptability without an arbitrary length
restriction; CLCL and MVCL work just fine. All that you need is that
the instruction be resumeable and for the
hardware/microcode/millicode to periodically check for pending
interrupts and update the registers as needed
