Masm64 SDK ignores "uses"

[jj2007]

There is no call in this test.

Interesting. "nc" stands for "no call":

Code Select Expand

Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz
*
pushing took 983 ms
moving  took 1139 ms
nc pushing took 1030 ms
nc moving  took 936 ms
pushing took 1045 ms
moving  took 1139 ms
nc pushing took 1014 ms
nc moving  took 952 ms
pushing took 998 ms
moving  took 1201 ms
nc pushing took 1014 ms
nc moving  took 936 ms
pushing took 967 ms
moving  took 1263 ms
nc pushing took 1030 ms
nc moving  took 951 ms
IMHO there should be a call, since we are talking about the best way to implement "uses rsi rdi". Anyway, it's an interesting result

[HSE]

IMHO there should be a call, since we are talking about the best way to implement "uses rsi rdi".

Correct. There was to much variations in your test. I tried to split the problem to see where variation is. Look like access to stack have that variation.