| Commit message (Collapse) | Author | Age |
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix for writing to RWTexture with half types on CUDA.
* CUDA half functionality doc updates.
* First pass support for sust.p RWTexture format conversion on write.
* Tidy up implementation of $C.
Made clamping mode #define able.
* A simple test for RWTexture CUDA format conversion.
* Add support for float2 and float4.
* WIP conversion testing.
* Use $E to fix byte addressing in X in CUDA.
* Do not scale when accessing via _convert versions of surface functions.
* Revert to previous test.
* Test with half/float convert write/read.
* More broad half->float read conversion testing.
* Improve documentation around half and RWTexture conversion.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix for writing to RWTexture with half types on CUDA.
* CUDA half functionality doc updates.
* First pass support for sust.p RWTexture format conversion on write.
* Tidy up implementation of $C.
Made clamping mode #define able.
* A simple test for RWTexture CUDA format conversion.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix for issue where threading KernelContext was not working on C++ test when there were multiple invocations.
* Improve test for context threading.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Fix for writing to RWTexture with half types on CUDA.
* CUDA half functionality doc updates.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Make args of CommandLine always unescaped.
* Add category.
* Don't need escaping on unix/linux.
* Remove some no longer used functions.
* Add requireSMVersion to CUDAExtensionTracker.
* half-calc.slang now works for CUDA.
* bit-cast-16-bit works on CUDA.
* WIP handling of CUDA vector<half> types.
* Half swizzle CUDA.
* Half vector test.
* Fix swizzle half bug.
* Fix compilation issue with narrowing to Index.
* Add unary ops.
* Add some vector scalar maths ops.
* Add half vector conversions for CUDA.
* Fix erroneous comment.
* Support for half comparisons.
* First pass test for half compare.
* Fix bug in CUDA specialized emit control.
Updated tests to have pre and post inc/dec.
* Removed unneeded parts of the cuda prelude.
* Half structured buffer works on CUDA.
* Added name lookup for Gfx::Format
* Support half texture type in test system.
* Test for half reading on CUDA.
* Add half formats to Vk and D3D utils.
* Fix getAt for CUDA - where there might not be a .x member in a vector.
* Template specialization for half surface access works.
* Half RWTexture support.
* Test for half RWTexture access.
* Update half-rw-texture test.
* Remove test function from CUDA prelude.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Make args of CommandLine always unescaped.
* Add category.
* Don't need escaping on unix/linux.
* Remove some no longer used functions.
* Add requireSMVersion to CUDAExtensionTracker.
* half-calc.slang now works for CUDA.
* bit-cast-16-bit works on CUDA.
* WIP handling of CUDA vector<half> types.
* Half swizzle CUDA.
* Half vector test.
* Fix swizzle half bug.
* Fix compilation issue with narrowing to Index.
* Add unary ops.
* Add some vector scalar maths ops.
* Add half vector conversions for CUDA.
* Fix erroneous comment.
* Support for half comparisons.
* First pass test for half compare.
* Fix bug in CUDA specialized emit control.
Updated tests to have pre and post inc/dec.
* Removed unneeded parts of the cuda prelude.
* Half structured buffer works on CUDA.
* Added name lookup for Gfx::Format
* Support half texture type in test system.
* Test for half reading on CUDA.
* Add half formats to Vk and D3D utils.
* Fix getAt for CUDA - where there might not be a .x member in a vector.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Make args of CommandLine always unescaped.
* Add category.
* Don't need escaping on unix/linux.
* Remove some no longer used functions.
* Add requireSMVersion to CUDAExtensionTracker.
* half-calc.slang now works for CUDA.
* bit-cast-16-bit works on CUDA.
* WIP handling of CUDA vector<half> types.
* Half swizzle CUDA.
* Half vector test.
* Fix swizzle half bug.
* Fix compilation issue with narrowing to Index.
* Add unary ops.
* Add some vector scalar maths ops.
* Add half vector conversions for CUDA.
* Fix erroneous comment.
* Support for half comparisons.
* First pass test for half compare.
* Fix bug in CUDA specialized emit control.
Updated tests to have pre and post inc/dec.
* Removed unneeded parts of the cuda prelude.
* Half structured buffer works on CUDA.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Make args of CommandLine always unescaped.
* Add category.
* Don't need escaping on unix/linux.
* Remove some no longer used functions.
* Add requireSMVersion to CUDAExtensionTracker.
* half-calc.slang now works for CUDA.
* bit-cast-16-bit works on CUDA.
* WIP handling of CUDA vector<half> types.
* Half swizzle CUDA.
* Half vector test.
* Fix swizzle half bug.
* Fix compilation issue with narrowing to Index.
* Add unary ops.
* Add some vector scalar maths ops.
* Add half vector conversions for CUDA.
* Fix erroneous comment.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Make args of CommandLine always unescaped.
* Add category.
* Don't need escaping on unix/linux.
* Remove some no longer used functions.
* Add requireSMVersion to CUDAExtensionTracker.
* half-calc.slang now works for CUDA.
* bit-cast-16-bit works on CUDA.
* WIP handling of CUDA vector<half> types.
* Half swizzle CUDA.
* Half vector test.
* Fix swizzle half bug.
* Fix compilation issue with narrowing to Index.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Update gfx back-ends to handle static specialization
The main goal here is to make the D3D11, D3D12 and Vulkan back-ends support static specialization of interface types in the case where the data for the type won't "fit" in the pre-allocated space for existential values. This includes all cases where the concrete type being specialized to has resources/samplers/etc., as well as any cases where its ordinary/uniform data exceeds the space available.
(Note that the CPU and CUDA targets don't need this work since they can (in theory) support arbitrary-size data in the fixed-size existential payload by using pointer indirection. Actually supporting indirection in those cases should be a distinct change)
The Slang compiler already performs layout for programs that have this kind of data that doesn't "fit," and it lays them out using an idea of "pending" type layouts. Basically, a type that contains some amount of specialized interface-type fields will produce both a "primary" type layout that just covers the data for the unspecialized case, as well as "pending" type layout that describes the layout for all the extra data needed by specialization.
When laying out a `ConstantBuffer<X>` or `ParameterBlocK<X>` ("CB" or "PB"), the front-end will try to place as much of that "pending" data into the layout of the buffer/block itself as is possible. That means that both CBs and PBs will be able to allocate trailing bytes for any ordinary data in the "pending" layout. PBs will be able to allocate any trailing resources/samplers into their layout, but for CBs they will spill out to be part of the pending layout for the buffer itself.
In order for the back-ends to properly handle pending data, they need to *either* assume the exact layout rules used by the front-end and try to reproduce them (e.g., by iterating over binding ranges and sub-objects in the exact same order that front-end layout would enumerate them), *or* they need to respect the reflection information produced by the front-end. This change takes the latter approach, trying to make only minimal assumptions about the layout rules being used. This choice is motivated by wanting to decouple the `gfx` implementation from the compiler front-end, especially insofar as this work has made me question whether the current layout rules are the best ones possible.
A common theme across all the implementations is to have a fixed-size type that can represent "binding offsets" for the chosen back-end. The offset type has fields that depend on the API-specific way bindings are indexed; e.g., for D3D11 it has offsets for CBV, SRV, UAV, and sampler bindings. This fixed-size offset type can be filled in based on Slang reflecton information, and then used to compute derived offsets with just a few add operations.
The simple offset type for each API is then extended to produce an offset type that includes both the offsets for "primary" data and also the offsets for "pending" data. Most logic that traffics in offsets doesn't have to know about this more complicated representation.
Making consistent use of these offsets required that I pretty much rewrite the logic that actually applies shader objects to the API state. Doing so might be lowering the efficiency of the system in the near term, but the increase in clarity was important for getting the work done, and it seems like it will also be important if/when we start trying to perform special-case optimizations around root and entry-point parameter setting.
While there are many API-specific differences, we can identify a repeated pattern where many steps, whether applying parameters to the pipeline stage or constructing signatures / layouts, can be broken down into three main operations on `ShaderObject`s or their layouts:
* `*AsValue()` is the core operation, and is the one used for the `ExistentialValue` case most of the time. It ignores the ordinary data in the object, and instead processes all nested binding ranges (for resources/smaplers) and sub-objects.
* `*AsConstantBuffer()` handles the `ConstntBuffer<X>` case, by dealing with the implicit buffer for ordinary data (if it is needed) and then delegates to the `*AsValue()` case.
* `*AsParameterBlock()` handles the `ParameterBlock<X>` case, by allocating/preparing/etc. any descriptor tables/sets that would be required for the current object/layout and then delegating to `*AsConstantBuffer()` to do the rest
The idea is that by having the parameter block case delegate to the constant buffer case, which delegates to the value/existential case, we can streamline a lot of the logic so that it doesn't seem quite as full of special cases.
Note: When preparing this pull request I spent a reasonable amount of time trying to clean up the D3D11 and Vulkan implementations, so they are probably the easiest to read and understand when it comes to the new code. Doing the cleanup work also helped to work out some weird corner case bugs/issues. In contrast, the D3D12 path hasn't had as much attention given to cleanliness and comments, so it really needs some attention down the line to get things into a state that is easier to understand.
* fixup: remove debugging code spotted in review
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Split out StringEscapeUtil.
* Added StringEscapeUtil.
* Fix typo in unix quoting type.
* Small comment improvements.
* Try to fix linux linking issue.
* Fix typo.
* Attempt to fix linux link issue.
* Update VS proj even though nothing really changed.
* Fix another typo issue.
* Fix for windows issue.
Fixed bug.
* Make separate Utils for escaping.
* Fix typo.
* Split out into StringEscapeHandler.
* Windows shell does handle removing quotes (so remove code to remove them).
* Handle unescaping if not initiating using the shell.
* Slight improvement around shell like decoding.
* Simplify command extraction.
* Add shared-library category type.
* Fix bug in command extraction.
* Typo in transcendental category.
* Enable unit-test on in smoke test category.
* Make parsing failing output as a failing test.
* Fixes for transcendental tests. Disable tests that do not work.
* Changed category parsing.
* Removed the TestResult parameter from _gatherTestsForFile.
Made testsList only output.
* Remove testing if all tests were disabled.
* Fix typo.
* Disable path canonical test on linux because CI issue.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Some test around matrix layout.
* A test for problem with C++ code output.
* Default should be column major CPU/CUDA tests confused this.
* Added column-major test
* Small fixes around tabs/comments
* Diagnostic problem for init of vector type with inappropriate params.
* Test demonstrating inconsistency between GPU and 'CPU-like' non square matrices.
* Added column major non square test.
* Remove vector mismatch - because ambiguity is arguably reasonable because float can silently promote to a vector.
* Small typo fixes for non-square-column-major.slang
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP CUDA half support.
* Working support for half on CUDA - requires cuda_fp16.h and associated files can be found.
* Fix for win32 for unused funcs.
* Fix for Clang.
* Hack to disable unused local function warning.
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This change originated as an attempt to re-enable a test case, but it has ended up disabling more tests (for good reasons) than it re-enables.
The main change here is a significant overhaul of the way that the D3D12 render path extracts information from the Slang reflection API to produce a root signature.
There were also some supporting fixes in the reflection information to make sure it returns what the D3D12 back-end needed.
The big picture here is that the D3D12 path now uses the descriptor ranges stored in the reflection data more or less directly.
It still needs to use register/space offset information queried via the "old" reflection API, but it only does so at the top level now, for the program and entry points themselves.
All other layout information is derived directly from what Slang provides.
Smaller changes:
* The "flat" reflection API was expanded to include `getBindingRangeDescriptorRangeCount()` which was clearly missing.
* The "flat" reflection results for a constant buffer or parameter block that didn't contain any uniform data and was mapped to a plain constant buffer needed to be fixed up. That logic is still way to subtle to be trusted.
* Several additional tests were disabled that relied on static specialization, global/entry-point generi type parameters, structured buffers of interfaces or other features we don't officially support with shader objects right now. All of the affected tests were somehow passing by sheer luck and because they often passed in specialization arguments via explicit `TEST_INPUT` lines.
* The `inteface-shader-param` test is re-enabled now that we can properly describe its input with the new `set` mode on `TEST_INPUT`
* `ShaderCursor::getElement()` can now be used on structure types (in addition to arrays) to support by-index access to fields
* The `TEST_INPUT` system was expanded to support both by-name and by-index setting of structure fields for aggregates
* The `TEST_INPUT` system was expanded to allow an `out` prefix to mark parts of an expression as outputs on a `set` lines
* The `TEST_INPUT` system was expanded so that anything that would be allowed on a `TEST_INPUT` line by itself (like `ubuffer(...)`) can now be used as a sub-expression on a `set` line
Co-authored-by: Yong He <yonghe@outlook.com>
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This change allows the `TEST_INPUT` syntax used by `render-test` to support aggregate values with a single input line more easily.
The test writer can now use a syntax like:
```
//TEST_INPUT:set someVar = 3.0
```
Input lines that start with the `set` keyword will now use a simpler `dst = src` format (instead of `dst:name=src` as the existing syntax used). The right-hand side expression can include:
* Numeric literals, both integer and floating-point (currently only supporting 32-bit scalar types; we could fix this later)
* Arrays, consisting of zero or more comma-separated expressions inside `[]`
* Aggregates, consisting of zero or more comma-separated "fields" inside `{}`. A field can either be `name: <expr>` or just `<expr>`
* Objects, which can be written as either `new SomeType{ <fields> }` or `new{ <fields> }` in the case where the type is know-able from context
With this approach is should be possible to support almost arbitrary-type inputs on a single line. For now, I have used this support to re-enable an existing test that had been disabled due to lack of support for setting up arrays of objects.
Major things left to do:
* The new syntax doesn't support the existing cases we had for `Texture2D`, etc. Those should probably be supported but I'd like to find a way to do it without duplicating the parsing logic (ideally the value cases from the existing code should Just Work in the new model)
* There is no support right now for non-32-bit scalar types
* It would be good if this support (and the shader cursor system) supported treating vectors like aggregates
* The actual value-setting logic doesn't currently handle aggregates without field names, so `{ a:0, b:1 }` will work but `{ 0, 1 }` will parse but fail when it comes time to set values
* While this approach lets complicated values be set with a single line, that isn't always what a user will want to do: in the future we should provide a way to break up an aggregate value over multiple lines that is consistent with this approach
* Once we port all of the relvant tests over, it would be great to drop the `set` prefix and have these lines look as simple and conventional as possible
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The original goal of this change was to streamline the `TEST_INPUT` system by eliminating options that are no longer relevant once we have eliminated the non-shader-object execution paths. The result is more or less a re-implementation/refactor of the logic around how input is parsed and represented, that tries to set things up for a more general sytem going forward.
The main changes isthat the `ShaderInputLayout` no longer tracks a simple flat list of `ShaderInputLayoutEntry` (that is a kind of pseudo-union of the various buffer/texture/value cases), and it instead uses a hierarchical representation composed of `RefObject`-derived classes to represent "values."
There are several "simple" cases of values
* Textures
* Samplers
* Uniform/ordinary data (`uniform`)
* Buffers composed of uniform/ordinary data (`ubuffer`)
Then there are composed/aggregate values that nest other values:
* An *aggregate* value is a set of *fields* which are name/value pairs. It can be used to fill in a structure, for example.
* An *array* value is a list of values for the elements of an array. It can be used to fill out an array-of-textures parameter, for example.
* A combined texture/sampler value is a pair of a texture value and a sampler value (easy enough)
* An *object* holds an optional type name for a shader object to allocate (it defaults to the type that is "under" the current shader cursor when binding), and a nested value that describes how to fill in the contents of that object
Finally there are cases of values that are just syntactic sugar:
* A `cbuffer` is just shorthand for creating an object value with a nested uniform/ordinary data value
The big idea with this recursive structure is that it gives us a way to handle more arbitrary data types with name-based binding. Supporting this new capability requires changes to both how input layouts get parsed, and also how they get bound into shader objects.
On the parsing side, things have been refactored a bit so that parsing isn't a single monolithic routine. The refactor also tries to make it so that the various options on an input item (e.g., the `size=...` option for textures) are only supported on the relevant type of entry (so you can't specify as many useless options that will be ignored).
The bigger change to parsing is that it now supports a hierarchical structure, where certain input elements like `begin_array` can push a new "parent" value onto a stack, and subsequent `TEST_INPUT` lines will be parsed as children of that item until a matching `end` item. This approach means that we can now in principle describe arbitrary hierarchical structures as part of test input without endlessly increasing the complexity of invididual `TEST_INPUT` lines.
On the binding side, we now have a central recursive operation called `assign(ShaderCursor, ShaderInputLayout::ValPtr)` that assigns from a parsed `ShaderInputLayout` value to a particular cursor. That operation can then recurse on the fields/elements/contents of whatever the cursor points to.
Major open directions:
* With this change it is still necessary to use `uniform` entries to set things like individual integers or `float`s and that is a little silly. It would be good to have some streamlines cases for setting individual scalar values.
* Further, once we have a hierarchical representation of the values for `TEST_INPUT` lines, it becomes clear that we really ought to move to a format more like `TEST_INPUT: dstLocation = srcValue;` where `srcValue` is some kind of hierarchial expression grammar. Refactoring things in this way should make the binding logic even more clear and easy to understand. The refactored parser should make parsing hierarchical expressions easier to do in the future (even if it uses the push/pop model for now)
* One detailed note is that the representation of buffers in this change is kind of a compromise. Just as an "object" value is a thin wrapper around a recursively-contained value for its "content" it seems clear that a buffer could be represented as a wrapper around a content value that could include hierarchical aggregates/objects instead of just flat binary data (this would be important for things like a buffer over a structure type that lays out different on different targets). The main problem right now with changing the representation is actually needing to compute the size of a buffer based on its content, so that can/should be addressed in a subsequent change.
Details:
* The base `RenderTestApp` class and the `ShaderObjectRenderTestApp` classes have been merged, since the hierarchy no longer serves any purpose.
* Disabled the tess that rely on `StructuredBuffer<IWhatever>` because they aren't really supported by our current shader object implementation
* Replaced used of `Uniform` and `root_constants` in `TEST_INPUT` lines with just `uniform`
* Removed a bunch of uses of `stride` from `cbuffer` inputs, where it wasn't really correct/meaningful
* Added the `copyBuffer()` operation to VK/D3D renderers, along with some missing `Usage` cases to support it.
* Made `ShaderCursor` handle the logic to look up a name in the entry points of a root shader object, rather than just having that logic in `render-test`. (We probably need to make a clear design choice on this issue)
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* Improve Vulkan shader-objects implementation.
1. Null bindings no longer crashes.
2. No longer copies push constants to staging CPU buffer before setting it into command buffer. The entry-point shader object now directly sets it into command buffer upon `bindObject` call.
* Update comments
* Fix
* Re-enable 3 tests.
Improved vulkan implementation so that each shader object is responsible for creating descriptor sets on-demand.
Fixed slang reflection to correctly report `ParameterBlock` binding.
* Fix gcc compile error.
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* Remove old code paths from render-test
Historically, the `render-test` tool was using three different code paths:
* One based on `gfx` and manual (non-reflection-based) parameter setting, used for OpenGL, D3D11, D3D12, and Vulkan
* One for CPU that used reflection-based parameter setting but shared no code with the first
* One for CUDA that used reflection-based parameter setting and shared some, but not all, code with the CPU path
Recently we've updated `render-test` to include a fourth option:
* Using `gfx` and the "shader object" system it exposes for a unified reflection-based parameter-setting system taht works across OpenGL, D3D11, D3D12, Vulkan, CUDA, and CPU
This change removes the first three options and leaves only the single unified path. A sa result, a bunch of code in `render-test` is no longer needed, and the codebase no longer relies on things like the `IDescriptorSet`-related APIs in `gfx`.
Several existing tests had to be disabled to make this change possible. Those tests will need to be audited and either re-enabled once we fix issues in the shader object system, or permanently removed if they don't test stuff we intend to support in the long run (e.g., global-scope type parameters, which aren't a clear necessity).
* fixup: CUDA detection logic
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* Add a CPU renderer implementation
This change adds a CPU back-end to `gfx` and ensures that most of our existing CPU tests pass when using it.
Detailed notes:
* Most of the CPU renderer implementation is copy-pasted from the CUDA case, so they share a lot of similar logic
* The main addition to the CPU renderer is a semi-complete implementation of host-memory textures. The logic here handles all the main shapes (Buffer, 1D, 2D, 3D, Cube) and all the currently-supported `Format`s that are sample-able as-is (no D24S8). The implementation is not intended to be fast, and it currently only does nearest-neighbor sampling, but otherwise it tries to avoid cutting too many corners and should be ar reasonable starting point for a more complete (but not performance-oriented) implementation.
* Refactored the CPU prelude `IRWTexture` interface to inherit from `ITexture`, since in most cases a single type will end up implementing both. It might be worth it to collapse it all down to a single interface later.
* Changed the CPU prelude `ITexture`/`IRWTexture` interface so that it takes both a pointer *and* a size for output arguments. This change seems necessary to allow a shader variable declared as a `Texture2D<float>` to fetch a single `float` when the underlying texture might be using RGBA32F.
* Added to the `IComponentType` public API so that we can query a "host callable" for an entry point and not just a binary.
* Turned off the `-shaderobj` flag on two tests that weren't yet compatible with shader objects but still had the flag left in on the path (since previously the CPU path always used the non-`gfx` non-shader-object logic anyway)
* Disabled one test (`dynamic-dispatch-11`) that relied on the `ConstantBuffer<IInterface>` idiom that we know we are planning to chagne soon anyway.
* Made a few changes to the CUDA path to bring it into line with what I added for the CPU path. These were mostly bug fixes around indexing logic for sub-objects and resources.
* fixup
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* Shader object specialization work-in-progress
The big change here is in the `setObject()` implementations, where we now take write the witness table ID and data for the value being assigned in both the CUDA and graphics-API paths (it is possible the code could be shared...). The logic for deciding whether a value "fits" in the existential value payload should actually be correct here, since it uses the reflection data.
The other relevant change is that the logic for writing out the ordinary/uniform data for a shader object on the graphics-API path has been updated so that it only allocates the GPU buffer *after* it knows the specialized layout, and can thus allocate space for any extra parameter data that wasn't in the original layout but got added by specialization. There is some inactive code in place that tries to sketch how the implementation should handle writing the data of sub-objects for interface-type fields into the appropriate areas of the allocated buffer for a parent object, but that is stubbed out for now pending implementation of the relevant reflection information.
This change also introduces logic in the graphics-API path to create a specialized layout for a shader object on-demand (so that it will only be created after the specialization arguments are known or can be inferred). The implementation needs to treat ordinary shader objects and root shader objects differently because the Slang API handles specialization differently for ordinary types vs. `IComponentType`s.
Some notes and caveats:
* The CUDA path doesn't need to compute specialized layouts the way the graphics-API path does because layout doesn't change based on specialization for that path (just as it won't for the CPU path)
* This code just skips over the RTTI field in existential values because it seems that we currently aren't using it in generated code.
* We are completely missing the logic for recursively writing the resource ranges of sub-objects bound to interface-type fields into the descriptor set(s) of the parent object. The missing link there is reflection API support, just as it is for filling in the ordinary/uniform data. We need a way to get the binding range offset (and binding array stride) for the "pending" data of a specialized interface-type field.
* The logic for computing specialization arguments based on the shader objects bound to interface-type fields has a lot of holes. Some of the indexing math is flat-out incorrect, and it also doesn't make any attempt to handle sub-object ranges with more than one element in them. I tweaked some of the code there to make it *more* correct, but that doesn't mean it is actually correct at this point.
* The logic for computing a specialized `IComponentType` for a `ProgramVars` in the graphics-API path seems to have a lot of overlap with `maybeSpecializeProgram()`, so we should look into ways to avoid the duplication over time.
* clang error fix
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* #include an absolute path didn't work - because paths were taken to always be relative.
* WIP: First pass in supporting output of line error information.
* Add support for lexing to better be able to indicate SourceLocation information.
* Fix lexer usage in DiagnosticSink in C++ extractor.
* Update diagnostics tests to have line location info.
* Fixed test expected output that now have source location information in them.
* Better handling of tab.
* Fix test expected results for tabbing change.
* DiagnosticLexer -> DiagnosticSink::SourceLocationLexer
Added line continuation tests.
* Fix typo.
* Added String::appendRepeatedChar
* Change to rerun tests.
* Added source locations to IR dumping.
* Output column for IR dump source loc.
* Add support for closing brace location to AST.
Use closing brace location in lowering when adding return void.
* Set the source location through SourceLoc - simplifies identifying if current loc is valid.
* Copy terminator sloc.
* Test for improved #line handling.
* Made writer the last parameter for dumpIR.
Small improvements to comments.
* Disable sloc output on dump IR by default.
* Fix issue with #line and inlining.
* Fix for output with improved #line output.
* Small comment change - mainly to kick off TC build.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Add `SampleGrad` overload for lod clamp.
* Fix gfx to run the test on vulkan.
* Whitespace change to trigger CI build
* remove presentFrame call in render-test
Co-authored-by: Yong He <yhe@nvidia.com>
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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This change converts a large number of our existing tests to use the `ShaderObject` support that was added to the `gfx` layer.
In many cases, tests were just updated to pass `-shaderobj` and the result Just Worked.
In other cases, a `name` attribute had to be added to one or more `TEST_INPUT` lines.
For tests that did not work with shader objects "out of the box," I spent a little bit of time trying to get them work, but fell back to letting those tests run in the older mode.
Future changes to the infrastructure will be needed to get those additional tests working in the new path.
Along with the changes to test files, the following implementation changes were made to get additional tests working:
* Because the shader object mode uses explicit register bindings (from reflection), the hacky logic that was offseting `u` registers for D3D12 based on the number of render targets gets disabled (by another hack).
* The "flat" reflection information coming from Slang was not correctly reporting "binding ranges" for things that consumed only uniform data (which would be everything on CUDA/CPU), so it was refactored to properly include binding ranges for anything where the type of the field/variable implied a binding range should be created (even if the `LayoutResourceKind` was `::Uniform`).
* A few fixes were made to the CUDA implementation of `Renderer`, in order to get additional tests up and running. Most of these changes had to do with texture bindings, which hadn't really been tested previously.
In addition, a few changes were made that were attempts at getting more tests working, but didn't actually help. These could be dropped if requested:
* As a quality-of-life feature (not being used) the `object` style of `TEST_INPUT` line is upgraded to support inferring the type to use from the type of the input being set.
* Any `object` shader input lines get ignored in non-shader-object mode.
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* Implements CUDA renderer in gfx.
* Revert unnecessary change.
* Revert unnecessary changes.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Move ShaderObject to be under renderer interface.
* Make `create*PipelineState` take `const PipelineStateDesc&`.
* Move ShaderCursor implementation to a cpp file
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* Add shader object parameter binding to renderer_test.
* remove multiple-definitions.hlsl
* Fix cuda implementation.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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* Make witness and RTTI handles lower to `uint2`.
And enable some dynamic dispatch tests on D3D/VK.
* Bug fixes.
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Overview
========
Prior to this change, we had two different code generation strategies for interface/existential types in Slang, that didn't always play nicely together:
* The "legacy" static specialization approach could handle plugging in an arbitrary concrete type for an existential type parameter (including types with resources, etc.), but wouldn't work well with things like a `StructuredBuffer<>` of an interface type, and requires somewhat counter-intuitive layout rules to make work.
* The new dynamic dispatch approach produces simpler, more easily understood layouts by assuming that values of interface type can fit into a fixed number of bytes. The tradeoff there is that it cannot handle types that include resources (only POD types).
The goal of this change is to make it so that the two strategies can co-exist. In particular, in cases where a shader is amenable to both static specialization and dynamic dispatch, the type layouts should agree.
In order to make the type layouts agree, we:
* Declare that *all* values of existential type reserve storage according to the dynamic-dispatch rules (so 16 bytes for the RTTI and witness-table information, plus whatever bytes are needed to story "any value" of a conforming type).
* Then we modify the "legacy" layout rules so that if a value of concrete type can fit in the reserved "any value" space for a given interface, then it is laid out there exactly like the dynamic dispatch rules would do. Otherwise, we fall back to the previous legacy rules (since we don't need to agree with the dynamic-dispatch layout on types that can't be used with dynamic dispatch).
Details
=======
* Renamed `ExistentialBox` to `BoundInterfaceType` to better clarify how it relates to `BindExistentialsType`
* Unconditionally apply the `lowerGenerics` pass during emit, since it is now responsible for aspects of the lowering of existential types when specialization is used.
* Made IR type layout take the target into account, so that the layout of resource types can vary by target (e.g., being POD on some targets, and invalid on others)
* Cleaned up some issues around using global shader parameters as the "key" for their layout information in the global-scope layout (only comes up when there are global-scope `uniform` parameters)
* Made there be a default any-value size (16) instead of making it be an error to leave out. This was the simplest option; we could try to go back to having an error, but we'd need to only issue it if we are sure a type/interface is being used with dynamic dispatch, since static dispatch doesn't have to obey the restrictions.
* Changed lowering of existential types to tuples so that bound interfaces where the concrete type won't fit use a "pseudo-pointer" instead of an "any-value" to hold the payload
* Changed IR type legalization to handle the "pseudo-pointer" case and apply layout information from an interface type over to the payload part when static specialization was used.
* Changed some details of how witness tables were being lowered, so that we didn't have to create "proxy" witness tables for the constraints on associated types (just use the actual requirement entries we generate)
* Changed witness tables so that they know the subtype doing the conforming
* Added logic so that we don't generate pack/unpack logic and witness table wrapper functions for types that are incompatible with any-value/dynamic dispatch for a given interface.
* Changed the core AST-level type layout logic to use the dynamic-dispatch layout in case things fit, and the legacy static specialization case when things don't (while also reserving space for the dynamic-dispatch fields)
* Changed a bunch of test cases for static specialization to properly use the new layout (which introduces new buffers in some cases, and moves data around in others).
Future Work
===========
The experience of trying to reconcile our older way of handling interface-type specialization with our newer model (that supports dynamic dispatch) makes it clear that we really need to make similar changes to our handling of generic type parameters on entry points and at the global scope.
A future change should make it so that a global type parameter is lowered with a type layout similar to a value parameter of interface type, including the RTTI and witness-table pieces, and just leaving out the "any value" piece. A similar translation strategy should apply to entry-point generic parameters (mirroring how we lower generic functions for dynamic dispatch already), and value specialization parameters.
Co-authored-by: Yong He <yonghe@outlook.com>
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* Fix constant folding in attributes
* remove unnecessary change
* remove unnecessary change
* remove unnecessary change
* Fixed circular checking issue.
* cleanup
* more cleanup
* minimize diff
* minimize diff
* minimize diff
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* Specialize witness table lookups.
* Remove generated files from vcxproj
* Fix call to generic interface methods.
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* #include an absolute path didn't work - because paths were taken to always be relative.
* Slang repro test that reloads and runs compiled code.
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* Specialize exsitentials parameters in struct fields.
* Cleanup.
* Handle partial existential parameter type specialization.
Co-authored-by: Yong He <yhe@nvidia.com>
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* Specialize exsitentials parameters in struct fields.
* Cleanup.
Co-authored-by: Yong He <yhe@nvidia.com>
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* Enable all dynamic dispatch tests on CUDA.
* Fix expected cross-compile test results.
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* Front-load cuda module loading to fill in RTTI pointers.
* Enable dynamic dispatch codegen for CUDA.
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* Support shader parameters that are an array of existential type.
* Rename to getFirstNonExistentialValueCategory
Co-authored-by: Yong He <yhe@nvidia.com>
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* Allow existential types in `StructuredBuffer` element type.
* Handle StructuredBuffer.Load/.Consume methods
* Clean up unnecessary changes
* Code cleanup
* Update test comment
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* Allow mixing unspecialized and specialized existential parameters.
* Fixes.
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* Allow unspecialized existential shader parameters (dynamic dispatch).
* Fixes.
* Fixes
* disable cuda test
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* Enable lower-generics pass universally.
* Exclude builtin interfaces and functions from lower-generics pass.
* Update stdlib.
* Fixup.
* Fixes handling of nested intrinsic generic functions.
* Fixes.
* Fixes.
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* Clean up the way that lookup "through" a base type is encoded
In order to undestand this change, it is important to undestand how lookup through base interfaces works prior to this change. In order to understand *that* it helps to be reminded of how inheritance relationships get encoded in the AST.
Suppose the user writes:
struct Base { int val; }
struct Derived : Base { ... }
...
Derived d = ...;
int v = d.val;
The question is how an expression like `d.val` gets semantically checked, and how it is encoded into the IR after semantic checking. You might assume it gets checked and encoded so that we end up with:
int v = ((Base) d).val;
and that seems like it should Just Work... so of course that isn't what Slang has been doing. Instead, we relied on the fact that the inheritance relationship `Derived : Base` is represented as an `InheritanceDecl` member of the `Derived` type, and we ended up checking the code into something like:
int v = d.<anonymous>.val;
where `<anonymous>` stands in for the name of the `InheritanceDecl` that represents inheritance from `Base`. This design choice makes a limited amount of sense when you consider how inheritance would typically be lowered to a C-like output language:
// struct Derived : Base { ... }
// =>
struct Derived { Base base; ... }
The problem with that encoding is that it really doesn't make sense for almost any other scenario. In particular, if you have a generic type parameter `T` that was constrianed with `T : ISomething`, then the constraint isn't even technically a *member* of the type parameter `T`, so expressing thing as a member reference in the AST is completely incorrect. Unfortunately, by the time it was clear that we needed something better, a bunch of implementation work was done based on the existing representation.
This change tries to clean things up so that lookup of a super-type member through a value of a sub-type does the obvious thing: cast the value to the super-type and then look up the member (as in `((Base) d).val`).
The core of the change is that in lookup, instead of creating `Constraint` breadcrumbs whenever we are looking up in a super-type (with a reference to the `TypeConstraintDecl` being used) we instead use `SuperType` breadcrumbs (with a reference to a `SubtypeWitness`). Then when we create the expression from a `LookupResultItem`, we translate any `SuperType` breadcrumbs into `CastToSuperTypeExpr`s (an expression type that already existed).
This change also adds support for lookup through the `This` type in the context of an interface, and in order for that to work we need a new kind of subtype witness to represent the knowledge that a `This` type is a subtype of the enclosing interface. Making that work forces us to change the representation of `TransitiveSubtypeWitness` so that it takes a pair of subtype witnesses (and not one subtype witness plus one `TypeConstraintDecl`). For the most part this is a small change, but it raises the possibility that some pieces of the code aren't going to be robust against all possible shapes of subtype witnesses.
The IR lowering logic has relied on the weird `d.<anonymous>` representation in order to ensure that when looking up interface members we weren't always casting to the interface type (which would create a `makeExistential` instruction), and then calling using that. Basically, the IR lowering would ignore the `d.<anonymous>` part and just emit `d`, but we can't do that for `((Base) d)` or `((IThing) d)` because whehter or not we should actually perform the cast depends on context.
For now we solve that problem by adding specific logic to ignore up-casts to interface types when they appear in member expressions or method calls. A more robust solution might be needed down the line, but this seems to work in practice.
All of this work is cleanup that I found was needed in order to make `extension`s of `interface` types workable.
* fixup: disable an incorrect test
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dispatch) (#1508)
* Allow calling a generic function with an existential value (dynamic dispatch).
* Fixes per review comments.
* Clean up implementation by having `openExistential` return `ExtractExistentialType` instead of a DeclRef to the interface with a `ThisTypeSubstitution`.
* More cleanups
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
Co-authored-by: Yong He <yhe@nvidia.com>
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* Support initializing an existential value from a generic value.
* Remove trailing spaces and clean up debugging code.
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* Fix premake5.lua so it uses the new path needed for OpenCLDebugInfo100.h
* Keep including the includes directory.
* Added the spirv-tools-generated files.
* We don't need to include the spirv/unified1 path because the files needed are actually in the spirv-tools-generated folder.
* Put the build_info.h glslang generated files in external/glslang-generated. Alter premake5.lua to pick up that header.
* First pass at documenting how to build glslang and spirv-tools.
* Improved glsl/spir-v tools README.md
* Added revision.h
* Change how gResources is calculated.
Update about revision.h
* Update docs a little.
* Split out spirv-tools into a separate project for building glslang. This was not necessary on linux, but *is* necessary on windows, because there is a file disassemble.cpp in spirv-tools and in glslang, and this leads to VS choosing only one. With the separate library, the problem is resolved.
* Fix direct-spirv-emit output.
* Update to latest version of spirv headers and spirv-tools.
* Upgrade submodule version of glslang in external.
* Add fPIC to build options of slang-spirv-tools
* WIP adding support for InterlockedAddFp32
* Upgrade slang-binaries to have new glslang.
* Fix issues with Windows slang-glslang binaries, via update of slang-binaries used.
* WIP - atomicAdd. This solution can't work as we can't do (float*) in glsl.
* WIP on atomic float ops.
* Added checking for multiple decls that takes into account __target_intrinsic and __specialized_for_target.
First pass impl of atomic add on float for glsl.
* Split __atomicAdd so extensions are applied appropriately.
* Made Dxc/Fxc support includes.
Use HLSL prelude to pass the path to nvapi
Added -nv-api-path
* Refactor around IncludeHandler and impl of IncludeSystem
* slang-include-handler -> slang-include-system
Have IncludeHandler/Impl defined in slang-preprocessor
* Small comment improvements.
* Document atomic float add addition in target-compatibility.md.
* CUDA float atomic support on RWByteAddressBuffer.
* Add atomic-float-byte-address-buffer-cross.slang
* Removed inappropriate-once.slang - the test is no longer valid when a file is loaded and has a unique identity by default. A test could be made, but would require an API call to create the file (so no unique id).
Improved handling of loadFile - uses uniqueId if has one.
* Work around for testing target overlaps - to avoid exceptions on adding targets.
Simplify PathInfo setup.
Modify single-target-intrinsic.slang - it no longer failed because there were no longer multiple definitions for the same target.
Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
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