PowerPC - Quantized Floating Point Instructions

PowerPC - Quantized Floating Point Instructions - Printable Version

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PowerPC - Quantized Floating Point Instructions - JimmyKazakhstan - 06-24-2021

This is a bit of an odd question but I thought I'd ask it here.
I'm asking this way in advance.

I'm currently in the process of writing my PowerPC For Dummies guide.
I eventually wanted to add the "psq" instruction types to the guide.
Is anyone familiar with them? Specifically the following instructions:

Code:
psq_l

psq_st

psq_lu

psq_stu

psq_lx

psq_stx

psq_stux

psq_lux

ps_abs

ps_nabs

ps_merge00

ps_merge01

ps_merge10

ps_merge11

ps_cmpo0

ps_cmpo1

ps_cmpu0

ps_cmpu1

ps_muls0

ps_muls1

ps_msub

ps_res

ps_rsqrte

ps_sel

The only mention of them that isn't from a dolphin/cemu update page I've been able to find online is this page.
But even on that page the explanations given are extremely ~removed~ (unclear)

If anyone is familiar with how any of these work, would you mind explaining the basic function of it? I would love to add it all into the guide!

RE: PowerPC - Quantized Floating Point Instructions - Vega - 06-25-2021

That smash board thread is very detailed but its tailored more towards seasoned coders.

It's important to have a complete understanding of the fundamentals of basic floating instructions and the fpr's before diving into paired singles

https://mkwii.com/showthread.php?tid=1744

After you have read that thread, the WiiBrew article (and the Smash thread) on paired singles will make more sense. Just boot a game up, pause the emulation, compile some mock paired single instructions to mess around with, and execute them (stepping) to see how they effect memory and what not.

RE: PowerPC - Quantized Floating Point Instructions - JimmyKazakhstan - 06-25-2021

(06-25-2021, 12:14 AM)Vega Wrote: That smash board thread is very detailed but its tailored more towards seasoned coders.

It's important to have a complete understanding of the fundamentals of basic floating instructions and the fpr's before diving into paired singles

https://mkwii.com/showthread.php?tid=1744

After you have read that thread, the WiiBrew article (and the Smash thread) on paired singles will make more sense. Just boot a game up, pause the emulation, compile some mock paired single instructions to mess around with, and execute them (stepping) to see how they effect memory and what not.

Thanks! I'll be sure to look into that.

RE: PowerPC - Quantized Floating Point Instructions - Vega - 06-25-2021

You're welcome!