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Forum: Amiga scene Today, 09:28
Replies: 596
Views: 21,210
Posted By meynaf
I heard IBM Power did that in the past, and the...

I heard IBM Power did that in the past, and the hint bit is now ignored because ordinary branch prediction works better.
Hints in the code also take space, btw. Encoding space is valuable and there...
Forum: Amiga scene Yesterday, 21:36
Replies: 596
Views: 21,210
Posted By meynaf
Yes, in general. Especially when loading...

Yes, in general. Especially when loading projects, opening files, etc.
Believe me, VS2015 that i have here is very slow.



Not that much for people who don't code, really.



Yes but...
Forum: Amiga scene Yesterday, 20:00
Replies: 596
Views: 21,210
Posted By meynaf
Of course it's not the hypothetical native speed,...

Of course it's not the hypothetical native speed, but even native apps don't reach this :D



That really depend what you're doing.
Some Amiga C compilers are way faster than VS on the pc....
Forum: Amiga scene Yesterday, 19:33
Replies: 596
Views: 21,210
Posted By meynaf
:agree

:agree
Forum: Amiga scene Yesterday, 19:30
Replies: 596
Views: 21,210
Posted By meynaf
Have i been so rude ? Why destroying posts like...

Have i been so rude ? Why destroying posts like this ? :shocked



Unreadable to say the least !



For what ?
Forum: Amiga scene Yesterday, 19:18
Replies: 596
Views: 21,210
Posted By meynaf
Of course but if you design your carriage for use...

Of course but if you design your carriage for use with donkeys, mules or whatever, you'll be real sorry the day the horse comes and it doesn't work together anymore !
Besides, as said previously,...
Forum: Amiga scene Yesterday, 19:08
Replies: 596
Views: 21,210
Posted By meynaf
I know it's not exactly everything, but...

I know it's not exactly everything, but nevertheless close enough.
Load/store unit has to handle addresses twice as large.
And ya better have bigger caches because you have more data to fit.
Of...
Forum: Amiga scene Yesterday, 17:22
Replies: 596
Views: 21,210
Posted By meynaf
So the hardware has to be made asap. Else it is...

So the hardware has to be made asap.
Else it is putting the carriage before the horse.



If you're speaking about the OS rather the hardware, then classic may be outdated and missing much, but...
Forum: Amiga scene Yesterday, 14:45
Replies: 596
Views: 21,210
Posted By meynaf
Of course but it had some advantages perhaps even...

Of course but it had some advantages perhaps even the amiga creators did not foresee... Or at least many users didn't !



This has nothing to do with the operating system. This is about the...
Forum: Amiga scene Yesterday, 07:47
Replies: 596
Views: 21,210
Posted By meynaf
What we want here is "like Amiga did". If what...

What we want here is "like Amiga did".
If what you want is "like Apple do" then get an Apple and leave us alone.
Forum: Amiga scene 24 May 2018, 19:47
Replies: 596
Views: 21,210
Posted By meynaf
Frankly i don't give a shit about the...

Frankly i don't give a shit about the compatibility. My goal is a machine which would retain the advantages of the miggy while raising it at reasonable performance levels.
Running old programs is...
Forum: Amiga scene 24 May 2018, 18:04
Replies: 596
Views: 21,210
Posted By meynaf
My ISA isn't an "intermediate representation". It...

My ISA isn't an "intermediate representation". It is made to be used on its own. I have a (slow but relative complete) software VM for it. It's even better than 68k to code on.
What do you want, use...
Forum: Amiga scene 24 May 2018, 16:17
Replies: 596
Views: 21,210
Posted By meynaf
What ? You ask risc lovers to write actual asm...

What ? You ask risc lovers to write actual asm code ? Ahem... :blased

Oh, by the way. This is a little bit boring example ; with my own instruction set it would be single instruction. But who...
Forum: Amiga scene 24 May 2018, 15:04
Replies: 596
Views: 21,210
Posted By meynaf
One sure thing is that the code is 6 bytes :p

One sure thing is that the code is 6 bytes :p
Forum: Amiga scene 24 May 2018, 14:41
Replies: 596
Views: 21,210
Posted By meynaf
Hmm... well... what can i say... :o Anyway,...

Hmm... well... what can i say... :o

Anyway, instruction timings depend heavily on the implementation, so we'd better favor small code - simply because it's small everywhere.
Forum: Amiga scene 24 May 2018, 14:23
Replies: 596
Views: 21,210
Posted By meynaf
Yet this does not require that big amounts of...

Yet this does not require that big amounts of memory because you could preload just the start of the samples (enough to cover the latency), loading what follows only for samples that are actually...
Forum: Amiga scene 24 May 2018, 14:22
Replies: 596
Views: 21,210
Posted By meynaf
In my memory exg is 6 and branch is 6 when not...

In my memory exg is 6 and branch is 6 when not taken and 8 if taken.
Forum: Amiga scene 24 May 2018, 14:18
Replies: 596
Views: 21,210
Posted By meynaf
You're both wrong. :p They have more or less...

You're both wrong. :p
They have more or less same speed on 020/030.
Linear example is always 12.
Branch example is 10/14 depending on the case (2+8 if taken, 2+6+6 if not taken).

Of course this...
Forum: Amiga scene 24 May 2018, 13:05
Replies: 596
Views: 21,210
Posted By meynaf
Do not search for a technical reason why to do...

Do not search for a technical reason why to do this - there is no valid one.
It's always the same old reason why folks do complicated things in place of simple ones.
Something like :
- Hey, i'm...
Forum: Amiga scene 24 May 2018, 12:54
Replies: 596
Views: 21,210
Posted By meynaf
Exactly, something that runs fine on a low end...

Exactly, something that runs fine on a low end machine will just fly on a fast one !



An example of this is arm's predicate+barrelshifter. But they're not as useful as they pretend when alone,...
Forum: Amiga scene 24 May 2018, 10:01
Replies: 596
Views: 21,210
Posted By meynaf
An OS book ? Is it "How to write an operating...

An OS book ? Is it "How to write an operating system in ten lessons" ? :D
Forum: Amiga scene 24 May 2018, 09:58
Replies: 596
Views: 21,210
Posted By meynaf
64-bit floats are different to the normal...

64-bit floats are different to the normal instruction set.
Besides, you're probably not coding your audio processing software in asm so it is not relevant.
Forum: Amiga scene 23 May 2018, 21:21
Replies: 596
Views: 21,210
Posted By meynaf
A few percent, for about everything being twice...

A few percent, for about everything being twice the size ?



I wrote "easier to support in hardware".
But anyway of course yes it is. Software is always easier to make when it has less things...
Forum: Amiga scene 23 May 2018, 19:18
Replies: 596
Views: 21,210
Posted By meynaf
For this task i'd choose to start from scratch.

For this task i'd choose to start from scratch.
Forum: Amiga scene 23 May 2018, 18:04
Replies: 596
Views: 21,210
Posted By meynaf
Nope this is the opposite of what I wrote :scream...

Nope this is the opposite of what I wrote :scream



Imagine executing legacy code with an IPC of up to 1024, similar to the power of a GPU.
But no need to write code especially for it.
And...
Forum: Amiga scene 23 May 2018, 17:12
Replies: 596
Views: 21,210
Posted By meynaf
That's not what i understood from what you wrote...

That's not what i understood from what you wrote a few posts earlier :

So i need my own test program or not ? What's needed to run that calculator ? Do you have an archive from which i can run the...
Forum: Amiga scene 23 May 2018, 17:06
Replies: 596
Views: 21,210
Posted By meynaf
Exactly ! Probably, but who knows...

Exactly !



Probably, but who knows what's lurking inside...



Well that depends how that "improvement" is made.
But in any case emulator settings are what have the most impact.
Forum: Amiga scene 23 May 2018, 16:05
Replies: 596
Views: 21,210
Posted By meynaf
That really depends. (I only have basic knowledge...

That really depends. (I only have basic knowledge about how it works, so don't take this as more than a rough idea.) But even with JIT active, some time is spent on executing non-JIT instructions,...
Forum: Amiga scene 23 May 2018, 14:40
Replies: 596
Views: 21,210
Posted By meynaf
Then what do you call efficiency here ? Is it...

Then what do you call efficiency here ?
Is it the number of host instructions per emulated instructions or something like that ?



But what do you call heavy load here ?
Host side ? Other apps...
Forum: support.WinUAE 22 May 2018, 22:05
Replies: 10
Views: 456
Posted By meynaf
Then there is no reason it should do a stack...

Then there is no reason it should do a stack overflow.

Just to be sure, comment this line out and try again.
Noninitialized random seed should have a minimal impact and be fine for some debug...
Forum: support.Hardware 22 May 2018, 21:59
Replies: 18
Views: 352
Posted By meynaf
Ok i wanted to verify there is no name conflict. ...

Ok i wanted to verify there is no name conflict.

But now it's even more mysterious. There must be something specific to A3000...
Forum: support.Hardware 22 May 2018, 21:03
Replies: 18
Views: 352
Posted By meynaf
You speak of WB_2.x, is it the device name you...

You speak of WB_2.x, is it the device name you use in partitioning or the volume name the workbench will show under the disk icon ? Or maybe both ?
Forum: Amiga scene 22 May 2018, 19:58
Replies: 596
Views: 21,210
Posted By meynaf
- OS preempting : makes the timings unstable but...

- OS preempting : makes the timings unstable but does not measurably reduce the peak speed
- other parts of UAE : simple, check host cpu% when emulated cpu does nothing
- flushing caches : not...
Forum: request.Other 22 May 2018, 19:35
Replies: 2
Views: 94
Posted By meynaf
As this is a Commodity, check the tool types of...

As this is a Commodity, check the tool types of your program.
If you have CX_POPUP=YES, change to CX_POPUP=NO.
Forum: project.EAB 22 May 2018, 15:57
Replies: 141
Views: 5,296
Posted By meynaf
I hope for your sake that no true user will...

I hope for your sake that no true user will accidentally fall on using the same convention...



That person will start by getting pissed off and won't have much of a desire to create another...
Forum: project.EAB 22 May 2018, 15:31
Replies: 141
Views: 5,296
Posted By meynaf
Beware of having easy trigger, you might one day...

Beware of having easy trigger, you might one day shoot someone legit...
Forum: Amiga scene 22 May 2018, 15:28
Replies: 596
Views: 21,210
Posted By meynaf
The only possibility i can see, is extra...

The only possibility i can see, is extra programming flexibility.



Nobody would want to code on that monster.
Beware, too, of 64 bit immediates. Simple move of a full sized data to a linear...
Forum: Amiga scene 22 May 2018, 14:56
Replies: 596
Views: 21,210
Posted By meynaf
Microcode is at a lower level than software...

Microcode is at a lower level than software emulation (more transparent).
So you can hide it and pretend there is no emulation - noone will be able to check.



If one wants the bang for the...
Forum: support.Hardware 22 May 2018, 12:11
Replies: 18
Views: 352
Posted By meynaf
So the disk seems to work fine when booted from...

So the disk seems to work fine when booted from floppy, hdtoolbox says it's ok and bootable, but it does not actually boot ?
Well, it appears it does recognise it as bootable, else it would probably...
Forum: Amiga scene 22 May 2018, 10:45
Replies: 596
Views: 21,210
Posted By meynaf
That's still better. Not something i...

That's still better.



Not something i want to go into, indeed.



Yes but you know people : they will still grumble this is emulation.
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