Comments (3)
hekota
commented on June 19, 2024
I have verified that it does not repro on x64 (pre-release Windows build 23H2 version 26016.1001).
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jenatali
commented on June 19, 2024
FYI @hekota @damyanp, this was a bug in WARP's arm64 code generation backend. Essentially, in the arm64 ISA, there's multiple variations of add instructions, and depending on which one is used, register 31 has a different meaning, either the stack pointer, or an always-zero value. WARP used the wrong one and ended up producing pointers that were 0-based instead of stack-based.
I coincidentally fixed this a few weeks ago due to a report on the DirectX Discord server (https://discord.com/channels/590611987420020747/596046911010504754/1227755899037286512). I confirmed that this test is passing on latest WARP bits on arm64, but crashes if I revert that fix. I'm hoping to get fixed binaries available via the WARP NuGet 1.0.12 soon.
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jenatali
commented on June 19, 2024
Fixed binaries are available in https://www.nuget.org/packages/Microsoft.Direct3D.WARP/1.0.12.
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