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2025-07-01extend fiddle to allow custom lua splices in more places (#7559)Ellie Hermaszewska
* Add fkYAML submodule * Generate slang-ir-inst-defs.h from slang-ir-inst-defs.yaml * generate ir-inst-defs.h * neaten things * neaten inst def parser * add rapidyaml submodule * remove fkyaml * remove fkyaml submodule * remove use of ir-inst-defs.h * format and warnings * fix wasm build * tidy * remove rapidyaml * Extend fiddle to allow custom splices in more places * Use lua to describe ir insts * fix * neaten * neaten * neaten * spelling * neaten * comment comment out assert * merge
2025-06-30Remove redundant [payload] attribute (Fix #7528) (#7555)Harsh Aggarwal (NVIDIA)
Removes the PayloadAttribute class and related infrastructure that was made redundant by PR #6595, which added ray payload access qualifiers (PAQs) per the DXR spec. The new [raypayload] attribute with access qualifiers provides the same functionality. Changes: - Remove PayloadAttribute class from slang-ast-modifier.h - Remove [payload] attribute syntax from core.meta.slang - Remove PayloadDecoration IR instruction and related processing - Remove HLSL emission of [payload] attribute - Remove IR lowering support for old PayloadAttribute The new [raypayload] attribute with PAQ support remains unchanged.
2025-06-30Add MLP training examples. (#7550)Yong He
* Add MLP training examples. * Formatting fix. * Fix. * Improve documentation on coopvector. * Improve doc. * Update doc. * Fix typo. * Cleanup shader. * Cleanup. * Fix test. * Fix type check recursion. * Fix. * Fix. * Fix override check.
2025-06-30Implement IFloat.scale for vectors, matrices (#7545)James Helferty (NVIDIA)
* Test for IFloat.scale usage Test that using IFloat.scale doesn't cause an internal compiler error. * Generic implementation of IFloat.scale() Fixes #7156 * Implement IFloat.scale for matrix Adds matrix implementation and test coverage. * Avoid explicitly constructing a matrix * Remove intrinsicOp from IFloat.scale impls Updates IFloat.scale implementations: - Remove __intrinsic_op($(kIROp_Mul)) since we're providing an implementation - Add [__unsafeForceInlineEarly] where missing
2025-06-04Add legalization for 0-sized arrays. (#7327)Yong He
* Add legalization for 0-sized arrays. * Allow 0-sized arrays in the front-end. * More tests. * Add `Conditional<T, hasValue>` type to core module. * Update toc. * Fix wording. * Update test.
2025-06-04Make interface types non c-style in Slang2026. (#7260)Yong He
* Make interface types non c-style. * Make Optional<T> work with autodiff and existential types. * Fix. * patch behind slang 2026. * Fix warnings. * cleanup. * Fix tests. * Fix. * Fix com interface lowering. * Add comment to test. * regenerate command line reference * Add test for passing `none` to autodiff function. * Fix recording of `getDynamicObjectRTTIBytes`. * Fix nested Optional types. --------- Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
2025-05-14Add new coopmat2 functions: Reduce and Transpose (#7027)Jay Kwak
This commit adds three new functions for CoopMat as described in the proposal document, Cooperative matrix 2 proposal spec#12 The new functions are: CoopMat<T,S,M,N,R>::Transpose CoopMat<T,S,M,N,R>::ReduceRow CoopMat<T,S,M,N,R>::ReduceColumn CoopMat<T,S,M,N,R>::ReduceRowAndColumn CoopMat<T,S,M,N,R>::Reduce2x2
2025-04-21Add `vk::offset` to specify member offsets for push constants (#6797)Darren Wihandi
* Add struct member offset qualifier for SPIRV * Implement for GLSL target and add tests * clean up * fix formatting * fix typo * renamed GLSLStructOffset to VkStructOffset and added emit-spirv-via-glsl test case
2025-04-07Support for Payload Access Qualifiers (#3448) (#6595)Harsh Aggarwal (NVIDIA)
* Add support for Ray Payload Access Qualifiers (PAQs) (#3448) - Added [raypayload] attribute for struct declarations - Implemented field validation requiring read/write access qualifiers - Added diagnostic error for missing qualifiers - Enabled PAQs in DXC compiler and HLSL emission - Added new test demonstrating PAQ syntax - Implemented proper handling of ray payload attributes in IR generation * format code * Cleanup: Remove unused vars * Add check to enablePAQ only for profile >= lib_6_7 * Review Fix - Add PAQ support for DX Raytracing add enablePAQ flag to DownstreamCompileOpitons, improve PAQ handling update raypayload-attribute-paq.slang to ensure hlsl and dxil is validated * Add diagnostic test for missing paq for lib_6_7 Compile using `-disable-payload-qualifiers` aka lib_6_6 profile raypayload-attribute-no-struct.slang and raypayload-attribute.slang --------- Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com> Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>
2025-02-28Add WaveGetLane* support for Metal and WGSL (#6371)Darren Wihandi
* support WaveGetLane* for WGSL and Metal * update test and glsl support * address review comments and fix metal test * add missing pragma guard * update test * Revert "update test" This reverts commit f2b97e91c29de154190710580c343bd0764aedbb. * update failing glsl metal test and added new test * make hlsl and glsl outputs similar * update test * disable tests for Metal and cleanup * comment fix * add expected failures * correct expected failures list * remove expected failure * add tests to expected failure --------- Co-authored-by: Yong He <yonghe@outlook.com>
2025-02-23Improve performance when compiling small shaders. (#6396)Yong He
Improve performance when compiling small shaders. Avoid copying witness table entries that are not getting used during linking. Avoid copying auto-diff related decorations and derivative functions during linking, if the user modules doesn't use autodiff. Cache operator overload resolution results on global session, so each new Session doesn't need to repetitively run through overload resolution from scratch.
2025-02-20Simplify implicit cast ctors for vector & matrix. (#6408)Yong He
* Simplify implicit cast ctors for vector & matrix. * Fix formatting. * Fix tests. * Fix Falcor test. * Mark __builtin_cast as internal.
2025-02-05Feature/initialize list side branch (#6058)kaizhangNV
* SP004: implement initialize list translation to ctor - We synthesize a member-wise constructor for each struct follow the rules described in SP004. - Add logic to translate the initialize list to constructor invoke - Add cuda-host decoration for the synthesized constructor - Remove the default constructor when we have a valid member init constructor - Disable -zero-initialize option, will re-implement it in followup (#6109). - Fix the overload lookup issue When creating invoke expression for ctor, we need to call ResolveInvoke() to find us the best candidates, however the existing lookup logic could find us the base constructor for child struct, we should eliminate this case by providing the LookupOptions::IgnoreInheritance to lookup, this requires us to create a subcontext on SemanticsVisitor to indicate that we only want to use this option on looking the constructor. - Do not implicit initialize a struct that doesn't have explicit default constructor. Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
2025-02-05Fix autodiff issue for vector<T, N> (#6275)kaizhangNV
* Fix autodiff issue for vector<T, N> Close #6154 We didn't implement correctly for vector<T, N> regarding the differentiablity. As we check differentiable before specialization, however according to the definition of vector, it has to be specialized to IFloat to know it's conformed to IDifferential type. Therefore for parameter type vector<T, N> will become no_diff. Therefore, we change the implementation a to make it explicit conform to IDifferential type. * fix typo
2025-01-30[Docs] Auto-diff documentation overhaul (#6202)Sai Praveen Bangaru
* AD: Docs Update * More documentation * More documentation * More docs fixes * Cleanup documentation * More docs polish. Add docs for the [Differentiable] attributes * Fixup code sections * Fixup * Address review comments * regenerate documentation Table of Contents * Update docs with more playground links --------- Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com> Co-authored-by: Yong He <yonghe@outlook.com>
2025-01-30Support cooperative vector (#6223)Jay Kwak
* Support cooperative vector without Vulkan-header update Adding a Slang support for cooperative vector. But this commit doesn't have Vulkan-header update.
2025-01-17Implement Quad Control intrinsics (#5981)Darren Wihandi
2025-01-10Add overload for select to handle Optional<T> (#6022)mTvare
Fixes #6020 Co-authored-by: Yong He <yonghe@outlook.com>
2025-01-09Support a storage class, NodePayloadAMDX, for SPIRV work-graphs (#6052)Jay Kwak
In order to unblock experiments with SPIRV work-graphs, Slang needs to support the storage class, `NodePayloadAMDX`. Note that this commit is only to support a storage class, `NodePayloadAMDX`. There are many parts required for work-graphs hasn't been implemented yet. The implementation of `DispatchNodeInputRecord` is not required, but it is implemented mostly for a testing purpose. Closes #6049 Co-authored-by: Yong He <yonghe@outlook.com>
2025-01-10Fix implicit string conversion breaking NativeStrings (#6035)Julius Ikkala
* Fix implicit string conversion breaking NativeStrings * Allow string literals to coerce to either string type * Add test for CPU string passing --------- Co-authored-by: Yong He <yonghe@outlook.com>
2025-01-07Lower varying parameters as pointers instead of SSA values. (#5919)Yong He
* Add executable test on matrix-typed vertex input. * Fix emit logic of matrix layout qualifier. * Pass fragment shader varying input by constref to allow EvaluateAttributeAtCentroid etc. to be implemented correctly.
2024-12-12Bit extract (#5847)kaizhangNV
* promoting bitfield extraction and insertion to become intrinsics for internal compiler use * removing duplicate intrinsics from glsl.meta.slang * refactor: update function signatures of bitfield extraction and insertion to use uint as the parameter type for offset and bits. --------- Co-authored-by: Nate Morrical <natemorrical@gmail.com> Co-authored-by: Yong He <yonghe@outlook.com>
2024-12-03Add intrinsics for aligned load/store. (#5736)Yong He
* Add intrinsics for aligned load/store. * Fix. * Update comment. * Implement aligned load/store as intrinsic_op. * Fix. * Add proposal doc. * fix typo.
2024-12-01[Docs] Minor fixes to auto-diff documentation (#5621)Sai Praveen Bangaru
* Minor fixes to AD documentation * Add a note warning about experimental behavior * Update vulkan --------- Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com> Co-authored-by: Yong He <yonghe@outlook.com>
2024-11-21Add datalayout for constant buffers. (#5608)Yong He
* Add datalayout for constant buffers. * Fixes. * Fix test. * Fix glsl codegen. * Update spirv-specific doc. * Fix test. * Fix binding in the presense of specialization constants. * address comments. * Add a test for constant buffer layout.
2024-10-27Add implicit cast for generic vector types. (#5413)Yong He
2024-10-23Document the interfaces in the core module (#5374)Jay Kwak
Co-authored-by: Yong He <yonghe@outlook.com>
2024-10-21Stdlib documentation for Atomic, Optional, Tuple (#5358)Ellie Hermaszewska
2024-10-21Add more doc for builtin interfaces. (#5357)Yong He
2024-10-17Cleanup atomic intrinsics. (#5324)Yong He
* Cleanup atomic intrinsics. * Fix. * Fix glsl. * Remove hacky intrinsic expansion logic for glsl image atomics. * Fix all tests. * Fix. * Add `InterlockedAddF16Emulated`. * Fix glsl intrinsic. * Fix.
2024-10-15Add stdlib documentation for attributes and interfaces. (#5297)Yong He
* Add stdlib documentation for attributes and interfaces. * Fix name mangling to avoid collision of functions in different extensions. * Fix doc.
2024-10-08Overhaul docgen tool and setup CI to generate stdlib reference. (#5232)Yong He
* Overhaul docgen tool and setup CI to generate stdlib reference. * Fix build error. * Write parsed doc for all decls. * fix. * fix callout. * Fix. * Fix comment. * Fix. * Delete obsolete doc tests. * Fix. * Categorize functions and types. * Fix CI. * Update comments.
2024-09-27Fix l-value computation for subscript call. (#5177)Yong He
2024-09-20Initial `Atomic<T>` type implementation. (#5125)Yong He
* Initial Atomic<T> type implementation. * Update design doc. * Fix. * Add test. * Fixes and add tests. * Fix WGSL. * Fix glsl. * Fix metal. * experiemnt with github metal. * experiment github metal 2 * github metal experiment 3 * experiment with github metal 4. * experiment with metal 5. * experiment 7. * metal experiment 8. * Fix metal tests. --------- Co-authored-by: Yong He <yhe@nvidia.com>
2024-09-19Support `IDifferentiablePtrType` (#5031)Sai Praveen Bangaru
* initial diff-ref-type interface * Initial support for `IDifferentiablePtrType` * Fix unused vars * More tests + fix switch case fallthrough. * Update slang-ir-autodiff.cpp * Update diff-ptr-type-loop.slang * Add optimization to allow more complex pair types * Update slang-ir-autodiff-primal-hoist.cpp * Update diff-ptr-type-loop.slang * Update slang-ir-autodiff-primal-hoist.cpp * More fixes to address reviews * Update slang-check-expr.cpp * Optimizations + rename `differentiableRefInterfaceType` -> `differentiablePtrInterfaceType` * Move pair logic to ir-builder, unify the type dictionaries. --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-09-18Add `IRWArray` interface, and make StructuredBuffer conform to them. (#5097)Yong He
* Add `IRWArray` interface, and make StructuredBuffer conform to them. * Update user guide. * Fix. * Fixes.
2024-09-09Fix generic IInteger `mod` implementation. (#5037)Yong He
2024-08-30Support specialization constants. (#4963)Yong He
* Support specialization constants. * Fix. * Fix. * Fix. * Fix. * Make sure specialization constants have names. * Clean up and support the dxc [vk::constant_id] syntax. * Fix. * Fix. * Fix.
2024-08-28Make sure `NullDifferential` and its witness are removed after autodiff. (#4958)Yong He
* Make sure `NullDifferential` and its witness are removed after autodiff. * Fix. * Add a test.
2024-08-28Fix partial inference of variadic generic functions. (#4956)Yong He
2024-08-28Metal: Mesh Shaders (#4280)Dynamitos
* Metal: mesh shading skeleton * Metal: fixing mesh payload * Metal: improving mesh shader indices output * Metal: Implementing conditional mesh output set * Metal: Trying to not break other backends * Metal: trying to fix mesh output set * Metal: Fixing MeshOutputSet usages * Metal: Fixing vertex and primitive semantics * Metal: Fixing code style * Metal: Fixed hlsl indices set * Fixed HLSL mesh output set disappearing and GLSL mesh output crashing * Metal: Adjusting task test matching --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-08-27Add functor syntax support. (#4926)Yong He
2024-08-27Document notable `__ref` uss in stdlib. Remove user docs use of '__ref'. (#4799)ArielG-NV
1. Document `__ref` in stdlib. 2. Remove `__ref` example in `docs\user-guide\a1-04-interop.md` 3. New example in `docs\user-guide\a1-04-interop.md` to compensate for no longer providing an example that uses `&` and `OpCapability`/`OpExtension`. Co-authored-by: Yong He <yonghe@outlook.com>
2024-08-27Adds a warning for using `[PreferRecompute]` on methods that may contain ↵Sai Praveen Bangaru
side effects (#4707) * Adds a warning for using prefer-recompute on methods that contain side effects * Rename `SideEffects` -> `SideEffectBehavior` --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-08-23Make variadic generics work with interfaces and forward autodiff. (#4905)Yong He
2024-08-19Tuple swizzling, concat, comparison and `countof`. (#4856)Yong He
* Tuple swizzling and element access. * Update proposal status. * Cleanup. * Fix merrge error. * Address review.
2024-08-18Variadic Generics Part 2: IR lowering and specialization. (#4849)Yong He
* Variadic Generics Part 2: IR lowering and specialization. * Update design doc status. * Update design doc. * Resolve review comments.
2024-08-12Warn when inout parameter is never written (#4777)venkataram-nv
Addresses #4698 as one approach to diagnose the potential problem. Emit warnings when a user marks a parameter as `inout` but never writes to it in the function. A new intrinsic function `unmodified(out T)` has been added to explicitly indicate that an `inout` variable will not be modified in the function. This is only one way to address the specific validation error in #4698. In general it seems that DXC does some more extensive checks on actual struct fields (as opposed to observing arbitrary struct writes), so that will be the next step.
2024-08-06Support an Upper-case variant of [NumThreads] and [Shader] (#4780)Jay Kwak
Closes #4746. This commit adds a support for "NumThreads" and "Shader" attribute keyword, which is in CamelCasing starting with an upper case letter. The attribute keywords in HLSL are case-insensitive. As an example, one of D3D documents says, "The attribute name "Shader" is case insensitive." https://microsoft.github.io/DirectX-Specs/d3d/WorkGraphs.html Slang, however, doesn't support the case-insensitivity. They should be all lower-case or CamelCasing starting with an upper case.
2024-07-26Allow passing sized array to unsized array parameter. (#4744)Yong He
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