[Bug 54887] New: Add support for SampleGrad() function

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54887

Bug ID: 54887
           Summary: Add support for SampleGrad() function
           Product: vkd3d
           Version: 1.7
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: hlsl
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

This is used by MojoShader's HLSL emitter for the TEXLDD instruction.

Amusingly, there's a test in vkd3d already, it's just in binary form only!

https://gitlab.winehq.org/wine/vkd3d/-/blob/b46df551eba19ccf45ad907bef0e6223...