nv2a 0x97 -> 0x1d78 (glEnable(GL_DEPTH_CLAMP)?) unhandled

[dracc]

Title

https://xemu.app/titles/4d53006e
https://xemu.app/titles/53430007

Bug Description

According to the debug output, 0x97 -> 0x1d78 is unhandled.
In the NV20 nouveau sources, this instruction is 3D_DEPTH_CLAMP.

The parameter of the call has so far been observed as one of the following:
0x1, 0x10

Expected Behavior

The NV2A instruction 0x1D78 should be handled.

xemu Version

0.6.2-55-gcaf84884c4

System Information

N/A

Additional Context

No response

[Triticum0]

Also, affect rolling, 0x1
https://xemu.app/titles/53430007/#Rolling

[jackchentwkh]

NV097_SET_ZMIN_MAX_CONTROL 0x00001D78

[abaire]

This one is in the nxdk already: https://github.com/search?q=repo%3AXboxDev%2Fnxdk%20NV097_SET_ZMIN_MAX_CONTROL&type=code

[abaire]

Tests: https://github.com/abaire/nxdk_pgraph_tests/blob/main/src/tests/z_min_max_control_tests.cpp

More work may be necessary to figure out the "IGNORE_W" bit mentioned in the nxdk code. It didn't have any effect on my test cases, but I also didn't do a truly exhaustive attempt to make it work.

HW results: https://github.com/abaire/nxdk_pgraph_tests_golden_results/wiki/Results-ZMinMaxControl