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#31

The Laboratory / Re: different compares clock c...

Last post by NoCforMe - February 13, 2025, 08:03:24 AM

Well, go ahead and test it then.
You have access to all the tools you need, including macros if you want to go that route.
Report back to us with your results.

#32

The Laboratory / Re: different compares clock c...

Last post by daydreamer - February 13, 2025, 07:43:34 AM

What's happened to this forum ?,nobody wants to test run code anymore ? :(
I have a comparison that might not been tested yet :
A loop with many scalar compares with conditional jumps vs packed compares ???

#33

UASM Assembler Development / Re: Website is down

Last post by lucho - February 12, 2025, 06:48:18 PM

I don't know why it's down. As for the "403 forbidden" error, have you tried to access it via an anonymizer?

#34

UASM Assembler Development / Re: Website is down

Last post by dannycoh - February 12, 2025, 03:43:08 PM

Thanks lucho
I downloaded everything from the way back machine.
The last link you provided gives me the same 403 forbidden error message.
Why is the main website down?
Is it for maintenance?
Is it down for good?

#35

The Laboratory / Re: different compares clock c...

Last post by NoCforMe - February 12, 2025, 09:41:57 AM

Real4 compares that can be done with integer 32 bit cmp is +inf ,-inf and zero 0.0 = zero 0
Real8 compares similar but with 64 bit integer cmp
Are these faster ?
Ucomiss faster than fpu compare ?

Look them up in that document I linked in my reply above.
They're all there. See for yourself.

#36

The Laboratory / Re: different compares clock c...

Last post by daydreamer - February 12, 2025, 06:15:21 AM

Real4 compares that can be done with integer 32 bit cmp is +inf ,-inf and zero 0.0 = zero 0
Real8 compares similar but with 64 bit integer cmp
Are these faster ?
Ucomiss faster than fpu compare ?

#37

UASM Assembler Development / Re: Website is down

Last post by lucho - February 11, 2025, 09:29:17 PM

The GitHub is working.
However, it does not have what the website had, such as Visual Studio integration, Windows.inc and documentation.

There is a 2.57 branch on GitHub:

https://github.com/Terraspace/UASM/tree/v2.57

The executables and docs can still be downloaded from the archived page given by Vortex:

http://web.archive.org/web/20241222030909/https://www.terraspace.co.uk/uasm.html

Also, I had archived version 2.57 and just put it here (sources + executables + docs):

https://lucho.ddns.net/UASM-2.57.7z

#38

The Laboratory / Re: different compares clock c...

Last post by Villuy - February 11, 2025, 05:50:31 PM

In fact, if instruction is needed in this place, then it is needed. No point in thinking about its price. But in broad sense, optimization is so complex and unknowable that there is nothing to rely on except empirical method for each concrete case.

[Ops]

#39

The Laboratory / Re: different compares clock c...

Last post by NoCforMe - February 11, 2025, 03:27:36 PM

To answer the OP's question without writing code, you might want to check this document of Agner Fog's, which gives the following info for each instruction for many different processors:

• Ops ("Number of macro-operations issued from instruction decoder to schedulers")
• Latency: ("This is the delay that the instruction generates in a dependency chain. The numbers are minimum values. Cache misses, misalignment, and exceptions may increase the clock counts considerably.")
• Reciprocal throughput ("This is also called issue latency. This value indicates the average number of clock cycles from the execution of an instruction begins to a subsequent independent instruction of the same kind can begin to execute.")

As you can see, determining execution time for instructions is no simple thing. However, these tables at least offer the chance to compare instructions to see which ones may be relatively faster.
Of course, as they say, YMMV.

#40

The Laboratory / Re: different compares clock c...

Last post by sinsi - February 11, 2025, 02:11:38 PM

Code Select Expand

counter_begin 100000,HIGH_PRIORITY_CLASS
;your code here
counter_end
;EAX has cycle count