User talk:Guy Harris

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Season's Greetings

Merry Christmas and a Prosperous 2026!

Hello Guy Harris, may you be surrounded by peace, success and happiness on this seasonal occasion. Spread the WikiLove by wishing another user a Merry Christmas and a Happy New Year, whether it be someone you have had disagreements with in the past, a good friend, or just some random person. Sending you heartfelt and warm greetings for Christmas and New Year 2026. Happy editing, Abishe (talk) 03:32, 27 December 2025 (UTC)[reply] Spread the love by adding {{subst:Seasonal Greetings}} to other user talk pages.

Abishe (talk) 03:32, 27 December 2025 (UTC)[reply]

Program counter

Thanks for your edit. See also my note to the previous editor at User talk:Stevebroshar. Spike-from-NH (talk) 18:04, 27 December 2025 (UTC)[reply]

@Spike-from-NH: Yup, I noticed some of the other things you commented on, but wasn't sure what the right thing was to do there.

In most cases, I don't think pipelining/superscalarity/out-of-orderness makes a difference to the program's view of the PC, otherwise procedure calls get a bit complicated. There might be some imprecision about the instruction that caused an exception; for example, in the IBM System/360 Model 91, several exceptions, such as overflows, underflows, and zero-divide exceptions, did not indicate the instruction that got the exception.^{[1]: 5, 14} But, yeah, that gets a bit tangled up in the weeds. Guy Harris (talk) 19:48, 27 December 2025 (UTC)[reply]

References

1. "IBM System/360 Model 91 Functional Characteristics" (PDF). Systems Reference Library. IBM. Retrieved 31 May 2024.