test_nm failing with nasm 2.16.03

[Tachi107]

Hi!

Debian recently upgraded to NASM version 2.16.03, and unfortunately this broke xbyak's test_nm.sh test. I'm not sure what broke exactly, so I'll just leave the error log here:

cxx=g++ ./test_nm.sh
nasm(32bit)
compile make_nm.cpp with -wall -i../ -dxbyak32
asm
xbyak
compile nm_frame.cpp
1045,1046c1045,1046
< 86d1
< 86c5
---
> 86ca
> 86e8
1048c1048
< 86f0
---
> 86c6
1053c1053
< 6687ce
---
> 6687f1
1061c1061
< 87f1
---
> 87ce

You may find some more information in the downstream bug report: https://bugs.debian.org/1080144.

What is the cause of this failure?

Thanks!

[herumi]

It is because NASM has changed the bytecode output of xchg (bytecode execution is not affected).
Xbyak 7.07.1 follows the new behavior of NASM to pass the tests.
https://github.com/herumi/xbyak/blob/master/doc/changelog.md

[Tachi107]

Thanks for the quick reply! This is indeed fixed when upgrading to the new release. Sorry for the noise!