2020-06-20 Copyright © 2020 Apple Inc. All Rights Reserved.
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2.11.1.1 Array Element Access with its Operator .............................................................. 40
2.11.1.2 Array Capacity ..................................................................................................... 40
2.11.1.3 Constructors for Templated Arrays ..................................................................... 40
2.11.2 Structures of Buffers, Textures, and Samplers ......................................................... 42
2.12 Argument Buffers ............................................................................................................ 43
2.12.1 Tier 2 Hardware Support for Argument Buffers ........................................................ 45
2.13 Uniform Type .................................................................................................................. 46
2.13.1 The Need for a Uniform Type .................................................................................... 46
2.13.2 Behavior of the Uniform Type ................................................................................... 48
2.13.3 Uniform Control Flow ................................................................................................ 49
2.14 Visible Function Table ..................................................................................................... 49
2.15 Function Group Attribute ................................................................................................ 50
2.16 Ray Tracing Intersection Tags ........................................................................................ 50
2.17 Type Conversions and Re-interpreting Data .................................................................. 52
2.18 Implicit Type Conversions ............................................................................................... 53
3 Operators ................................................................................................ 54
3.1 Scalar and Vector Operators ........................................................................................... 54
3.2 Matrix Operators ............................................................................................................. 57
4 Address Spaces ....................................................................................... 60
4.1 device Address Space .................................................................................................... 60
4.2 constant Address Space .................................................................................................. 61
4.3 thread Address Space ..................................................................................................... 62
4.4 threadgroup Address Space ........................................................................................... 62
4.4.1 SIMD-groups and Quad-groups ............................................................................... 63
4.5 threadgroup_imageblock Address Space ....................................................................... 63
4.6 ray_data Address Space ................................................................................................. 64
5 Function and Variable Declarations .......................................................... 65
5.1 Functions ......................................................................................................................... 65
5.1.1 Vertex Functions ....................................................................................................... 65
5.1.1.1 Post-Tessellation Vertex Functions .................................................................... 66
5.1.1.2 Patch Type and Number of Control Points Per-Patch ........................................ 66
5.1.2 Fragment Functions .................................................................................................. 67
5.1.3 Compute Functions (Kernels) ................................................................................... 68
5.1.4 Visible Functions ....................................................................................................... 68
5.1.5 Intersection Functions ............................................................................................... 68
5.1.6 Tile Functions ............................................................................................................ 69
5.1.7 Host Name Attribute ................................................................................................. 70
5.1.8 Templated Vertex, Fragment, and Kernel functions ................................................. 70
5.2 Function Arguments and Variables .................................................................................. 71
5.2.1 Locating Buffer, Texture, and Sampler Arguments ................................................... 72
5.2.1.1 Vertex Function Example with Resources and Outputs to Device Memory ........ 73
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