Instruction Timing

[jj2007]

AMD Ryzen 5 3400G

As already seen in the other thread, AMD sucks for lodsb

594 ticks for movzx+inc
1515 ticks for lodsb

[TimoVJL]

Mine is old Zen 2 gen, 12 nm, with integral graphics.
We still wait Zen 3 gen results.

[Greenhorn]

Ryzen 5 3400G is Zen+.

Attached is Zen 2 (AMD Ryzen 7 3700X)

[TimoVJL]

Thanks.

Ryzen 5 3400G is Zen+.

Yes, Zen+ based (2nd generation)

Code Select Expand

Instr. Operands Bytes Intel Intel AMD AMD
--------- ----------------- ------ ------ ------ ------
lodsb 1 4 5 4 12 6
lodsw 2 4 5 4 12 6
lodsd 1 4 5 3 12 12
...
xchg reg64,mem64 6 77 83 75 119 68
xchg mem64,reg64 6 77 83 75 119 68


[hutch--]

Something missing in the ZIP file.

Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz (AVX2)
------------------------------------------------
Instr.     Operands         Bytes  Clocks
------------------------------------------------
error reading: bin\mov_reg64_reg64.bin

[TimoVJL]

That test needs asmc64.exe too, in path or in same folder.

[Greenhorn]

Thanks.

Ryzen 5 3400G is Zen+.

Yes, Zen+ based (2nd generation)

Sorry, I missed the period after the "2". My eyes get bad.

[nidud]

deleted

[hutch--]

You guys worry me, a working executable file should be trivial to make.

Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz (AVX2)
------------------------------------------------
Instr.     Operands         Bytes  Clocks
------------------------------------------------
The system cannot find the path specified.
error reading: bin\mov_reg64_reg64.bin

A:\InstructionTiming>

[nidud]

deleted

[nidud]

deleted

[TimoVJL]

@hutch--
Pre-created binaries with empty asmc64.cmd.
Perhaps now you can have results for excel table.

[hutch--]

Hi Timo,

I downloaded the Excel reader you posted, had a look at the table but deleted it after as it was squarking crap with a nag screen. At least I understood what the data was and the CPU comparisons it contained.

[TimoVJL]

Ok,
Attached results in tabular format and tiny viewer for it.

[hutch--]

Thanks,

That worked OK.