Meeting 2021-01-21

[XAMPPRocky]

Where & When

• #rust-gpu on the Embark Discord.
• Time: 17:00 CET
• Previous Meeting

Agenda

• Project updates
• Review & discuss any open MCPs

Feel free to propose additional items in this thread.

[XAMPPRocky]

Attendees:

@eddyb
@Jasper-Bekkers
@VZout
@DJMcNab
@Hentropy
@msiglreith

Project Updates:

@XAMPPRocky: Mostly focused on Embark work.
@VZout: Same.
@Jasper-Bekkers: working on bindless MCP
@eddyb: inline assembly inference.
@XAMPPRocky: where to document that?
@eddyb: it's ad-hoc onto of spir-v
@XAMPPRocky: dev guide seems fine.

MCP Arch module #384

@eddyb: add intrinics hooks into compiler
@XAMPPRocky: or inline asm
@Jasper-Bekkers: We might have some already
Msl: how much does it depend on the existing glam?
@XAMPPRocky: I think initially we'll want to depend on using existing glam library for dependencies.

MCP Bindless support #389

@Jasper-Bekkers: messing around, depends on inference work by eddy.
@eddyb: Still requires more work, but hopefully soon.

@XAMPPRocky: How does this interact with RuntimeArray
@eddyb: We need to be able to use references directly, which is why we want to be able to infer storage classes
@eddyb: possible to make slices map to OpRuntimeArray, but it's not useful, not sure how interface with it.

@Jasper-Bekkers: Another thing is bindings working with globals.
@eddyb: Need to emulate pointers fully, might need some kind of warning
@Jasper-Bekkers: We should sync up as there are decorations to reduce the overhead.
@Jasper-Bekkers: I have included some examples in the issues, will sketch it out further.
@Jasper-Bekkers: Related to the binding proposal, in having everything in a struct with attributes.
@eddyb: That will all work with read-only, the issue is more around when you need to write.
@Jasper-Bekkers: You don't need to be able to mutate the runtime array, you only need to mutate the handles
@Jasper-Bekkers: Is it possible to use Refcell to handle to mutation?
@eddyb: It depends on how shared it is, if it's not shared you can use a cell for shared you need atomics.
@eddyb: There are some tricks to workaround this, but it requires some design work.