unexpected results with clang-cl /fp:fast in release mode about directxmath HOT 6 CLOSED

Just to clarify, the 45 literal you are passing to XMQuaternionRotationRollPitchYaw: The function takes radians, not degrees, so you are going to get something like 7 complete rotations plus a little...

If you do a rotation by XM_PI/4 (i.e. 45° expressed as radians), the answers match for MSVC, clang v15, /fp:fast, etc.

from directxmath.

oops, sorry for that...
but it is still there (and not just for specific angles)
does clang version make a difference?

my cli options: (and inherit from default)
/GS /W3 /Gy /Zi /O2 /fp:fast /D "NDEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /WX- /Gd /Oi /MD /Fa"x64\Release\" /EHsc /nologo /Fo"x64\Release\" /Fp"x64\Release\Project1.pch" /diagnostics:column
(i'm not using any pch, though it does specify a name for it)

from directxmath.

from directxmath.

Any use of /fp:fast allows the compiler to deviate from IEEE-754 rules for floating-point, so it's not going to be consistent between compilers.

from directxmath.

You may also want to try the latest DirectXMath. Windows 10 SDK (19041) contains DirectXMath 3.14. You can get newer versions from GitHub, NuGet, vcpkg, or installing newer Windows SDKs.

from directxmath.

You may also want to try the latest DirectXMath. Windows 10 SDK (19041) contains DirectXMath 3.14. You can get newer versions from GitHub, NuGet, vcpkg, or installing newer Windows SDKs.

i tried ver3.17 through vcpkg, but it still not works unfortunately.
anyway, thank you very much
let's looking forward to a better collaboration between compilers in the future xD

from directxmath.