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path: root/source/slang/slang-emit-glsl.cpp
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2025-08-05Implement SPV_EXT_fragment_invocation_density (SPV_NV_shading_rate) (#8037)davli-nv
* Implement SPV_EXT_fragment_invocation_density -Adds semantics SV_FragSize and SV_FragInvocationCount and implements them for SPIRV and GLSL using the appropriate target builtins from extensions. -Adds test case checking for expected target builtins from these semantics. -For future work, could implement SV_FragSize using pixel shader input SV_ShadingRate for HLSL, and SV_FragInvocationCount needs research. Fixes #7974 Generated with Claude Code * address review feedback https://github.com/shader-slang/slang/pull/8037#pullrequestreview-3084645845 * fixup format * review feedback https://github.com/shader-slang/slang/pull/8037#pullrequestreview-3086442819
2025-07-21Fix C-style casts in GLSL pointer cast operations (#7841)Copilot
* Initial plan * Fix C-style casts in GLSL pointer cast operations Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
2025-07-17fix const qualifier for specialization constants (#7640)Sirox
Co-authored-by: Yong He <yonghe@outlook.com>
2025-05-16Address structured buffer `GetDimensions` issues for WGSL, GLSL and SPIRV ↵Darren Wihandi
(#7010) * Fix structured buffer get dimensions * Further fixes and added tests * Remove unnecessary include * Fix test issues * attempt to fix wgpu crash * test remove half usage in test * attempt to fix WGPU test issue * Another attempt to fix WGSL test - make test similar to the existing GetDimensions test --------- Co-authored-by: Yong He <yonghe@outlook.com>
2025-05-16Fix broken -emit-spirv-via-glsl test option (#7091)sricker-nvidia
Fixes issue #6898 The -emit-spirv-via-glsl slang-test option has been broken for some amount of time. Tests that were using it were operating as if using -emit-spirv-directly, leading to many duplicated tests. After fixing the test option, there were an number of errors that appeared as a result. This change fixes the broken test option and the resulting test errors. Some of the test errors revealed some legitimate issues, such as: -The GLSL bitCount instrinsic only supports 32-bit integers and requires emulation for other bit widths. -Emitting GLSL 8-bit and 16-bit glsl integer types did not emit the proper extension requirements -Emitting GLSL and casting for 16-bit integers was missing a closing parenthesis. -Missing profile for GL_EXT_shader_explicit_arithmetic_types -Missing toType cases for UInt8/Int8 for the kIROp_BitCast case in tryEmitInstExprImpl.
2025-05-14Remove readonly keyword from buffer pointer definitions (#7068)aidanfnv
For https://github.com/shader-slang/slang/issues/6880 This change removes the readonly keyword from buffer pointer definitions from the GLSL source emitter, to allow for mutable buffer pointers. Support for readonly will be readded when we add const pointer support later.
2025-05-12Cleanups related to RIFF support (#7041)Theresa Foley
2025-04-27Emit SPIRV NonReadable decoration for WTexture* (#6922)Darren Wihandi
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
2025-04-13Fix pointer field/member access for GLSL (#6798)Darren Wihandi
* Fix pointer field access for GLSL * Add test * Fix SPIRV test * add spirv via glsl test
2025-03-13Add mesh shader output topology checks (#6592)Darren Wihandi
* initial wip * more wip * add test * add unexpected for invalid target * fixups and improve error message * fixups and improve error message * remove incorrect comment --------- Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>
2025-03-06Update SPIRV-Tools and fix new validation errors. (#6511)Yong He
* Update SPIRV-Tools and fix new validation errors. * Implement pointers for glsl target. * Reworked packStorage/unpackStorage code gen to operate on pointers rather than values.
2025-02-28Add Slang-specific intrinsics for integer pack/unpack (#6459)Darren Wihandi
* update hlsl meta * update test * use slang syntax in meta file * improve meta file * fix pack clamp u8 * remove builtin packed types, use typealias instead * fix wgsl pack clamp * fix formatting --------- Co-authored-by: Yong He <yonghe@outlook.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>
2025-02-27Map `SV_InstanceID` to `gl_InstanceIndex-gl_BaseInstance` (#6468)Yong He
* Map `SV_InstanceID` to `gl_InstanceIndex-gl_BaseInstance` * Fix ci.
2025-02-02Add support for WGSL subgroup operations (#6213)Darren Wihandi
* initial work * more work * more work on glsl intrinsics * add subgroup broadcast for glsl * wip add wgsl extension tracking * enable tests, enable extensions and added some todos * format and warning fixes * fix wgsl extension tracker --------- 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.
2025-01-24Add bgra8 format (#6163)Darren Wihandi
* add brga8 format * add tests * minor fixes * cleanup * maybe fix broken quad control test * add missing xslang flag on test --------- Co-authored-by: Yong He <yonghe@outlook.com>
2025-01-17Implement Quad Control intrinsics (#5981)Darren Wihandi
2025-01-14Implement specialization constant support in numthreads / local_size (#5963)Julius Ikkala
* Allow using specialization constants in numthreads attribute * Add support for GLSL local_size_x_id syntax * Fix overeager specialization constant parsing * Add diagnostics for specialization constant numthreads * Remove unused variable * Fix local_size_x_id not finding existing specialization constant * Allow materializeGetWorkGroupSize to reference specialization constants * Use SpvOpExecutionModeId for modes that require it * Cleanup specialization constant numthreads code * Add tests for specialization constant work group sizes * Fix implicit Slang::Int -> int32_t cast * Fix querying thread group size in reflection API --------- 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.
2024-12-30Add `RaytracingAccelerationStructure::__init(uint64_t)`. (#5967)Yong He
2024-12-26Add packed 8bit builtin types (#5939)Darren Wihandi
* Add packed bytes builtin type * fix test
2024-12-17Implement bitcast for 64-bit date type (#5895)kaizhangNV
Close #5470 * implement bitcast for 64-bit date type * Move 'ensurePrelude' to base class to remove duplication * Assert on 'double' type for Metal target, as Metal doesn't have 'double' support
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>
2024-12-09Add SV_DrawIndex. (#5787)Yong He
Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.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.
2024-11-05Move switch statement bodies to their own lines (#5493)Ellie Hermaszewska
* Move switch statement bodies to their own lines * format --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-10-30Write only texture types. (#5454)Yong He
* Add support for write-only textures. * Fix capabilities. * Fix implementation. * Fix. * format code --------- Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com> Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
2024-10-29formatEllie Hermaszewska
* format * Minor test fixes * enable checking cpp format in ci
2024-10-17Cleanup definition of `printf`. (#5330)Yong He
* Cleanup definition of `printf`. * Fix. * Fix spirv generation. * Fix. * enhance test.
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.
2024-10-09Use user defined type name in glsl buffer declarations. (#5242)Yong He
2024-09-26Move texture format inference to frontend and add reflection api for it. (#5155)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>
2024-09-05Respect matrix layout in uniform and in/out parameters for HLSL target. (#5013)Yong He
* Respect matrix layout in uniform and in/out parameters for HLSL target. * Update test. * Fix test. * fix test. * Fix metal layout calculation. * Fix compile error. * Fix compiler error. --------- Co-authored-by: Yong He <yhe@nvidia.com>
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.
2024-08-26Fix Varying Variable Location Assignments With Hull Shaders (#4915)ArielG-NV
* Fix Varying Variable Location Assignments With Hull Shaders Fixes: #4913 Fixes: #4540 Changes: 1. Added `kIROp_ControlBarrier` to HLSL/GLSL emitting. 2. Added a method to track 'used' and 'unused' varyings for when legalizing GLSL. This allows us to assign correct offsets to automatically added varyings * Added a `ZeroLSB` check to UIntSet for this purpose * add missing return * code comment adjustment * cleanup * comment and HLSL controlBarrier mistake * assume space for glsl/spriv varying is irrelevant
2024-08-19Remove using SpvStorageClass values casted into AddressSpace values (#4861)Ellie Hermaszewska
* Remove using SpvStorageClass values casted into AddressSpace values Also removes support for specific storage classes in __target_intrinsic snippets * remove SLANG_RETURN_NEVER macro * squash warnings * Make nonexhaustive switch statement error on gcc * Add SLANG_EXHAUSTIVE_SWITCH_BEGIN/END macros --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-08-12Emit memory qualifier once for GLSL targets (#4819)ArielG-NV
Fixes #4818 Emit memory qualifier once for GLSL targets. Co-authored-by: Yong He <yonghe@outlook.com>
2024-07-25Overhaul IR lowering of pointer types. (#4710)Yong He
* Overhaul IR lowering of pointer types. * Propagate address space in IRBuilder. * Fixup. * Fix. * Fix. * Change how Ptr type is printed to text. * Fix.
2024-07-01Fix the type error in kIROp_RWStructuredBufferLoad (#4523)kaizhangNV
* Fix the type error in kIROp_RWStructuredBufferLoad In StructuredBuffer::Load(), we allow any type of integer as the input. However, when emitting glsl code, StructuredBuffer::Load(index) will be translated to the subscript index of the buffer, e.g. buffer[index], however, glsl doesn't allow 64bit integer as the subscript. So the easiest fix is to convert the index to uint when emitting glsl. * Add commit
2024-06-28Implement HLSL resource bindings and default type `float4` to ↵ArielG-NV
`SubpassInput<T>` (#4462) * Add case to `emitVectorReshape` for `vector<>` type, `scalar` value 1. Add new case 2. Add test * fix warning * fix warning * Implement HLSL resource bindings and default type `float4` to `SubpassInput<T>` fixes: #4440 1. Removed GLSLInputAttachmentIndexLayout modifier and the somewhat 'hacky' binding model 'Input Attachment' previously relied upon. This was changed to work with the slang-type-layout rules system. This change allows Slang automatic bindings, HLSL bindings, GLSL bindings, and translation of GLSL to and from HLSL bindings to work. 2. Added default argument `float4` to SubpassInput<T>. 3. Merged glsl.meta and hlsl.meta SubpassInput logic. * fix InputAttachment attribute checks fix InputAttachment attribute checks for HLSL and GLSL syntax * remove unused var * validate attribute correctly Attributes do not have type information. We must check the type expression to validate attribute usage. * remove hacky validation type based validation before types are fully resolved is quite hacky and unstable to changes and wrapped types * fix warning * remove redundant `!= nullptr` * remove extra `!= nullptr` * fix some warnings/errors * subpass capability to limit to dxc & remove default values in some functions * revert logic to previous logic revert logic to return if we have a binding regardless of if a VarDecl is given the binding
2024-06-26Expand upon existing `ImageSubscript` support (Metal, GLSL, SPIRV) (#4408)ArielG-NV
* Add additional `ImageSubscript` features: 1. Added ImageSubscript support for Metal & a test case * Merge GLSL/SPIRV/Metal `ImageSubscript` legalization pass 2. Added multisample support to glsl/spirv/metal for when using ImageSubscript * Added in this PR since the overhaul of the code merges together GLSL/SPIRV/Metal implementation 3. Fixed minor metal texture `Load`/`Read` bugs * [HLSL methods of access do not support subscript accessor for texture cube array](https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/texturecubearray) * removed swizzling of uint/int/float * other odd bugs which were causing compile errors note: Compute tests do not work due to what seems to be the GFX backend (causes crash without error report). The tests are disabled. * disable LOD with texture 1d seems that LOD for 1d textures need to be a compile time constant as per an error metal throws * syntax error in hlsl.meta * static_assert alone with intrinsic_asm error provides cleaner errors Note: `static_assert` seems to be unstable and not be fully respected (still require `intrinsic_asm` to avoid a stdlib compile error) * change comment to `// lod is not supported for 1D texture * add `static_assert` in related code gen paths * address review * address review * add asserts as per review comment, NOTE: unclear if these should be release 'asserts' as well
2024-06-14Improve Direct SPIRV Backend Test Coverage (#4396)ArielG-NV
'raytracing' and 'texture-footprint' tests fixed texture-footprint bug changed when we emit raytracing/rayquery extensions with glsl backend (to reduce incorrect extension emitting)
2024-06-12Capability System: Implicit capability upgrade warning/error (#4241)ArielG-NV
* capability upgrade warning/error adjusted implementation + tests to support a warning/error if capabilities are implicitly upgraded and test accordingly. * add glsl profile caps * add GLSL and HLSL capabilities to the associated capability * syntax error in capdef * only error if user explicitly enables capabilities 1. changed testing infrastructure to not set a `profile` explicitly, 2. Added tests to be sure this works as intended with user API and with slangc command line * Change capability atom definitions and how Slang manages them to fix errors 1. most `glsl_spirv` version atoms have been removed from `.capdef`, instead we will translate `spirv` version atoms into `glsl_spirv` since there is no point in writing the same code twice in `.capdef` files to define `spirv` versions. 2. add spirv version, and hlsl sm version (and equivlent) capability dependencies 3. removed some stage requirments which were set on objects, keep the wrapper capabilities. I am keeping the wrapper capabilities since I am unaware on if there are stage limitations (spec says code in practice does not work). * check internal version instead of version profile (_spirv_1_5 vs. spirv_1_5) * remove unused OpCapability. adjust SPIRV version'ing again for glsl_spirv * apply workaround for glslang bug with rayquery usage * ensure capabilities targetted by a profile and added together by a user are valid * remove additions to `spirv_1_*` wrapper * spirv_* -> glsl_spirv fix * fix bug where incompatable profiles would cause invalid target caps * try to avoid joining invalid capabilities * fix the warning/error & printing * run through tests to fix capability system and test mistakes many mistakes were mesh shaders doing `-profile glsl_450+spirv_1_4`. This is not allowed for a few reasons 1. the test tooling does not handle arguments the same as `slangc` 2. glsl_450 core profile does not support mesh shaders, nor does spirv_1_4. sm_6_5 does work in this senario * set some sm_4_1 intrinsics to sm_4_0 * replace `GLSL_` defs with `glsl_` * swap the unsupported render-test syntax for working syntax * set d3d11/d3d12 profile defaults this is required since sm version changes compiled code & behavior * adjusted nvapi capabilities with atomics + d3d11 set to use sm_5_0 as per default * cleanup * address review * incorrect styling * change `bitscanForward` to work as intended on 32 bit targets --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-06-11Fix `GetAttributeAtVertex` for spirv and glsl targets. (#4334)Yong He
2024-06-10Address glslang ordering requirments for 'derivative_group_*NV' (#4323)ArielG-NV
* Address glslang ordering requirments for 'derivative_group_*NV' fixes: #4305 The solution is to emit some `layout`s after a module source is emitted. Added to slangs gfx backend code to enable the compute shader derivative extension for testing purposes. * address review * enable removed test --------- Co-authored-by: Yong He <yonghe@outlook.com>
2024-05-16RasterizerOrder resource for spirv and metal. (#4175)Yong He
* RasterizerOrder resource for spirv and metal. Also fixes the byte address buffer logic for metal. * Fix. * Delete commented lines. --------- Co-authored-by: Jay Kwak <82421531+jkwak-work@users.noreply.github.com>
2024-05-14Remove use of `G0` and `__target_intrinsic` in stdlib. (#4170)Yong He
* Remove use of `G0` and `__target_intrinsic` in stdlib. * Fix. * Fix calling intrinsic in global scope.
generated by cgit v1.2.3 (git 2.39.1) at 2026-07-02 22:52:55 +0000