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SPIRV-Cross/spirv_msl.hpp
Chip Davis ae6c05f6f4 MSL: Move inline uniform blocks to the end of the argument buffer. 
Limit inline blocks to one per descriptor set.

This should avoid the need for complicated code to calculate the
argument buffer ID stride of an inline uniform block. If there's demand
for more inline blocks, we can revisit this.
2020-01-25 13:40:51 -06:00

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/*
* Copyright 2016-2020 The Brenwill Workshop Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SPIRV_CROSS_MSL_HPP
#define SPIRV_CROSS_MSL_HPP
#include "spirv_glsl.hpp"
#include <map>
#include <set>
#include <stddef.h>
#include <unordered_map>
#include <unordered_set>
namespace SPIRV_CROSS_NAMESPACE
{
// Indicates the format of the vertex attribute. Currently limited to specifying
// if the attribute is an 8-bit unsigned integer, 16-bit unsigned integer, or
// some other format.
enum MSLVertexFormat
{
MSL_VERTEX_FORMAT_OTHER = 0,
MSL_VERTEX_FORMAT_UINT8 = 1,
MSL_VERTEX_FORMAT_UINT16 = 2,
MSL_VERTEX_FORMAT_INT_MAX = 0x7fffffff
};
// Defines MSL characteristics of a vertex attribute at a particular location.
// After compilation, it is possible to query whether or not this location was used.
struct MSLVertexAttr
{
uint32_t location = 0;
uint32_t msl_buffer = 0;
uint32_t msl_offset = 0;
uint32_t msl_stride = 0;
bool per_instance = false;
MSLVertexFormat format = MSL_VERTEX_FORMAT_OTHER;
spv::BuiltIn builtin = spv::BuiltInMax;
};
// Matches the binding index of a MSL resource for a binding within a descriptor set.
// Taken together, the stage, desc_set and binding combine to form a reference to a resource
// descriptor used in a particular shading stage.
// If using MSL 2.0 argument buffers, the descriptor set is not marked as a discrete descriptor set,
// and (for iOS only) the resource is not a storage image (sampled != 2), the binding reference we
// remap to will become an [[id(N)]] attribute within the "descriptor set" argument buffer structure.
// For resources which are bound in the "classic" MSL 1.0 way or discrete descriptors, the remap will become a
// [[buffer(N)]], [[texture(N)]] or [[sampler(N)]] depending on the resource types used.
struct MSLResourceBinding
{
spv::ExecutionModel stage = spv::ExecutionModelMax;
uint32_t desc_set = 0;
uint32_t binding = 0;
uint32_t msl_buffer = 0;
uint32_t msl_texture = 0;
uint32_t msl_sampler = 0;
};
enum MSLSamplerCoord
{
MSL_SAMPLER_COORD_NORMALIZED = 0,
MSL_SAMPLER_COORD_PIXEL = 1,
MSL_SAMPLER_INT_MAX = 0x7fffffff
};
enum MSLSamplerFilter
{
MSL_SAMPLER_FILTER_NEAREST = 0,
MSL_SAMPLER_FILTER_LINEAR = 1,
MSL_SAMPLER_FILTER_INT_MAX = 0x7fffffff
};
enum MSLSamplerMipFilter
{
MSL_SAMPLER_MIP_FILTER_NONE = 0,
MSL_SAMPLER_MIP_FILTER_NEAREST = 1,
MSL_SAMPLER_MIP_FILTER_LINEAR = 2,
MSL_SAMPLER_MIP_FILTER_INT_MAX = 0x7fffffff
};
enum MSLSamplerAddress
{
MSL_SAMPLER_ADDRESS_CLAMP_TO_ZERO = 0,
MSL_SAMPLER_ADDRESS_CLAMP_TO_EDGE = 1,
MSL_SAMPLER_ADDRESS_CLAMP_TO_BORDER = 2,
MSL_SAMPLER_ADDRESS_REPEAT = 3,
MSL_SAMPLER_ADDRESS_MIRRORED_REPEAT = 4,
MSL_SAMPLER_ADDRESS_INT_MAX = 0x7fffffff
};
enum MSLSamplerCompareFunc
{
MSL_SAMPLER_COMPARE_FUNC_NEVER = 0,
MSL_SAMPLER_COMPARE_FUNC_LESS = 1,
MSL_SAMPLER_COMPARE_FUNC_LESS_EQUAL = 2,
MSL_SAMPLER_COMPARE_FUNC_GREATER = 3,
MSL_SAMPLER_COMPARE_FUNC_GREATER_EQUAL = 4,
MSL_SAMPLER_COMPARE_FUNC_EQUAL = 5,
MSL_SAMPLER_COMPARE_FUNC_NOT_EQUAL = 6,
MSL_SAMPLER_COMPARE_FUNC_ALWAYS = 7,
MSL_SAMPLER_COMPARE_FUNC_INT_MAX = 0x7fffffff
};
enum MSLSamplerBorderColor
{
MSL_SAMPLER_BORDER_COLOR_TRANSPARENT_BLACK = 0,
MSL_SAMPLER_BORDER_COLOR_OPAQUE_BLACK = 1,
MSL_SAMPLER_BORDER_COLOR_OPAQUE_WHITE = 2,
MSL_SAMPLER_BORDER_COLOR_INT_MAX = 0x7fffffff
};
enum MSLFormatResolution
{
MSL_FORMAT_RESOLUTION_444 = 0,
MSL_FORMAT_RESOLUTION_422,
MSL_FORMAT_RESOLUTION_420,
MSL_FORMAT_RESOLUTION_INT_MAX = 0x7fffffff
};
enum MSLChromaLocation
{
MSL_CHROMA_LOCATION_COSITED_EVEN = 0,
MSL_CHROMA_LOCATION_MIDPOINT,
MSL_CHROMA_LOCATION_INT_MAX = 0x7fffffff
};
enum MSLComponentSwizzle
{
MSL_COMPONENT_SWIZZLE_IDENTITY = 0,
MSL_COMPONENT_SWIZZLE_ZERO,
MSL_COMPONENT_SWIZZLE_ONE,
MSL_COMPONENT_SWIZZLE_R,
MSL_COMPONENT_SWIZZLE_G,
MSL_COMPONENT_SWIZZLE_B,
MSL_COMPONENT_SWIZZLE_A,
MSL_COMPONENT_SWIZZLE_INT_MAX = 0x7fffffff
};
enum MSLSamplerYCbCrModelConversion
{
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY = 0,
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_IDENTITY,
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_BT_709,
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_BT_601,
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_YCBCR_BT_2020,
MSL_SAMPLER_YCBCR_MODEL_CONVERSION_INT_MAX = 0x7fffffff
};
enum MSLSamplerYCbCrRange
{
MSL_SAMPLER_YCBCR_RANGE_ITU_FULL = 0,
MSL_SAMPLER_YCBCR_RANGE_ITU_NARROW,
MSL_SAMPLER_YCBCR_RANGE_INT_MAX = 0x7fffffff
};
struct MSLConstexprSampler
{
MSLSamplerCoord coord = MSL_SAMPLER_COORD_NORMALIZED;
MSLSamplerFilter min_filter = MSL_SAMPLER_FILTER_NEAREST;
MSLSamplerFilter mag_filter = MSL_SAMPLER_FILTER_NEAREST;
MSLSamplerMipFilter mip_filter = MSL_SAMPLER_MIP_FILTER_NONE;
MSLSamplerAddress s_address = MSL_SAMPLER_ADDRESS_CLAMP_TO_EDGE;
MSLSamplerAddress t_address = MSL_SAMPLER_ADDRESS_CLAMP_TO_EDGE;
MSLSamplerAddress r_address = MSL_SAMPLER_ADDRESS_CLAMP_TO_EDGE;
MSLSamplerCompareFunc compare_func = MSL_SAMPLER_COMPARE_FUNC_NEVER;
MSLSamplerBorderColor border_color = MSL_SAMPLER_BORDER_COLOR_TRANSPARENT_BLACK;
float lod_clamp_min = 0.0f;
float lod_clamp_max = 1000.0f;
int max_anisotropy = 1;
// Sampler Y'CbCr conversion parameters
uint32_t planes = 0;
MSLFormatResolution resolution = MSL_FORMAT_RESOLUTION_444;
MSLSamplerFilter chroma_filter = MSL_SAMPLER_FILTER_NEAREST;
MSLChromaLocation x_chroma_offset = MSL_CHROMA_LOCATION_COSITED_EVEN;
MSLChromaLocation y_chroma_offset = MSL_CHROMA_LOCATION_COSITED_EVEN;
MSLComponentSwizzle swizzle[4]; // IDENTITY, IDENTITY, IDENTITY, IDENTITY
MSLSamplerYCbCrModelConversion ycbcr_model = MSL_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY;
MSLSamplerYCbCrRange ycbcr_range = MSL_SAMPLER_YCBCR_RANGE_ITU_FULL;
uint32_t bpc = 8;
bool compare_enable = false;
bool lod_clamp_enable = false;
bool anisotropy_enable = false;
bool ycbcr_conversion_enable = false;
MSLConstexprSampler()
{
for (uint32_t i = 0; i < 4; i++)
swizzle[i] = MSL_COMPONENT_SWIZZLE_IDENTITY;
}
bool swizzle_is_identity() const
{
return (swizzle[0] == MSL_COMPONENT_SWIZZLE_IDENTITY && swizzle[1] == MSL_COMPONENT_SWIZZLE_IDENTITY &&
swizzle[2] == MSL_COMPONENT_SWIZZLE_IDENTITY && swizzle[3] == MSL_COMPONENT_SWIZZLE_IDENTITY);
}
bool swizzle_has_one_or_zero() const
{
return (swizzle[0] == MSL_COMPONENT_SWIZZLE_ZERO || swizzle[0] == MSL_COMPONENT_SWIZZLE_ONE ||
swizzle[1] == MSL_COMPONENT_SWIZZLE_ZERO || swizzle[1] == MSL_COMPONENT_SWIZZLE_ONE ||
swizzle[2] == MSL_COMPONENT_SWIZZLE_ZERO || swizzle[2] == MSL_COMPONENT_SWIZZLE_ONE ||
swizzle[3] == MSL_COMPONENT_SWIZZLE_ZERO || swizzle[3] == MSL_COMPONENT_SWIZZLE_ONE);
}
};
// Special constant used in a MSLResourceBinding desc_set
// element to indicate the bindings for the push constants.
// Kinda deprecated. Just use ResourceBindingPushConstant{DescriptorSet,Binding} directly.
static const uint32_t kPushConstDescSet = ResourceBindingPushConstantDescriptorSet;
// Special constant used in a MSLResourceBinding binding
// element to indicate the bindings for the push constants.
// Kinda deprecated. Just use ResourceBindingPushConstant{DescriptorSet,Binding} directly.
static const uint32_t kPushConstBinding = ResourceBindingPushConstantBinding;
// Special constant used in a MSLResourceBinding binding
// element to indicate the buffer binding for swizzle buffers.
static const uint32_t kSwizzleBufferBinding = ~(1u);
// Special constant used in a MSLResourceBinding binding
// element to indicate the buffer binding for buffer size buffers to support OpArrayLength.
static const uint32_t kBufferSizeBufferBinding = ~(2u);
// Special constant used in a MSLResourceBinding binding
// element to indicate the buffer binding used for the argument buffer itself.
// This buffer binding should be kept as small as possible as all automatic bindings for buffers
// will start at max(kArgumentBufferBinding) + 1.
static const uint32_t kArgumentBufferBinding = ~(3u);
static const uint32_t kMaxArgumentBuffers = 8;
// Decompiles SPIR-V to Metal Shading Language
class CompilerMSL : public CompilerGLSL
{
public:
// Options for compiling to Metal Shading Language
struct Options
{
typedef enum
{
iOS = 0,
macOS = 1
} Platform;
Platform platform = macOS;
uint32_t msl_version = make_msl_version(1, 2);
uint32_t texel_buffer_texture_width = 4096; // Width of 2D Metal textures used as 1D texel buffers
uint32_t swizzle_buffer_index = 30;
uint32_t indirect_params_buffer_index = 29;
uint32_t shader_output_buffer_index = 28;
uint32_t shader_patch_output_buffer_index = 27;
uint32_t shader_tess_factor_buffer_index = 26;
uint32_t buffer_size_buffer_index = 25;
uint32_t view_mask_buffer_index = 24;
uint32_t dynamic_offsets_buffer_index = 23;
uint32_t shader_input_wg_index = 0;
uint32_t device_index = 0;
bool enable_point_size_builtin = true;
bool disable_rasterization = false;
bool capture_output_to_buffer = false;
bool swizzle_texture_samples = false;
bool tess_domain_origin_lower_left = false;
bool multiview = false;
bool view_index_from_device_index = false;
bool dispatch_base = false;
bool texture_1D_as_2D = false;
// Enable use of MSL 2.0 indirect argument buffers.
// MSL 2.0 must also be enabled.
bool argument_buffers = false;
// Ensures vertex and instance indices start at zero. This reflects the behavior of HLSL with SV_VertexID and SV_InstanceID.
bool enable_base_index_zero = false;
// Fragment output in MSL must have at least as many components as the render pass.
// Add support to explicit pad out components.
bool pad_fragment_output_components = false;
// Specifies whether the iOS target version supports the [[base_vertex]] and [[base_instance]] attributes.
bool ios_support_base_vertex_instance = false;
// Use Metal's native frame-buffer fetch API for subpass inputs.
bool ios_use_framebuffer_fetch_subpasses = false;
// Enables use of "fma" intrinsic for invariant float math
bool invariant_float_math = false;
// Emulate texturecube_array with texture2d_array for iOS where this type is not available
bool emulate_cube_array = false;
// Allow user to enable decoration binding
bool enable_decoration_binding = false;
// Requires MSL 2.1, use the native support for texel buffers.
bool texture_buffer_native = false;
// Forces all resources which are part of an argument buffer to be considered active.
// This ensures ABI compatibility between shaders where some resources might be unused,
// and would otherwise declare a different IAB.
bool force_active_argument_buffer_resources = false;
bool is_ios()
{
return platform == iOS;
}
bool is_macos()
{
return platform == macOS;
}
void set_msl_version(uint32_t major, uint32_t minor = 0, uint32_t patch = 0)
{
msl_version = make_msl_version(major, minor, patch);
}
bool supports_msl_version(uint32_t major, uint32_t minor = 0, uint32_t patch = 0) const
{
return msl_version >= make_msl_version(major, minor, patch);
}
static uint32_t make_msl_version(uint32_t major, uint32_t minor = 0, uint32_t patch = 0)
{
return (major * 10000) + (minor * 100) + patch;
}
};
const Options &get_msl_options() const
{
return msl_options;
}
void set_msl_options(const Options &opts)
{
msl_options = opts;
}
// Provide feedback to calling API to allow runtime to disable pipeline
// rasterization if vertex shader requires rasterization to be disabled.
bool get_is_rasterization_disabled() const
{
return is_rasterization_disabled && (get_entry_point().model == spv::ExecutionModelVertex ||
get_entry_point().model == spv::ExecutionModelTessellationControl ||
get_entry_point().model == spv::ExecutionModelTessellationEvaluation);
}
// Provide feedback to calling API to allow it to pass an auxiliary
// swizzle buffer if the shader needs it.
bool needs_swizzle_buffer() const
{
return used_swizzle_buffer;
}
// Provide feedback to calling API to allow it to pass a buffer
// containing STORAGE_BUFFER buffer sizes to support OpArrayLength.
bool needs_buffer_size_buffer() const
{
return !buffers_requiring_array_length.empty();
}
// Provide feedback to calling API to allow it to pass a buffer
// containing the view mask for the current multiview subpass.
bool needs_view_mask_buffer() const
{
return msl_options.multiview && !msl_options.view_index_from_device_index;
}
// Provide feedback to calling API to allow it to pass a buffer
// containing the dispatch base workgroup ID.
bool needs_dispatch_base_buffer() const
{
return msl_options.dispatch_base && !msl_options.supports_msl_version(1, 2);
}
// Provide feedback to calling API to allow it to pass an output
// buffer if the shader needs it.
bool needs_output_buffer() const
{
return capture_output_to_buffer && stage_out_var_id != ID(0);
}
// Provide feedback to calling API to allow it to pass a patch output
// buffer if the shader needs it.
bool needs_patch_output_buffer() const
{
return capture_output_to_buffer && patch_stage_out_var_id != ID(0);
}
// Provide feedback to calling API to allow it to pass an input threadgroup
// buffer if the shader needs it.
bool needs_input_threadgroup_mem() const
{
return capture_output_to_buffer && stage_in_var_id != ID(0);
}
explicit CompilerMSL(std::vector<uint32_t> spirv);
CompilerMSL(const uint32_t *ir, size_t word_count);
explicit CompilerMSL(const ParsedIR &ir);
explicit CompilerMSL(ParsedIR &&ir);
// attr is a vertex attribute binding used to match
// vertex content locations to MSL attributes. If vertex attributes are provided,
// is_msl_vertex_attribute_used() will return true after calling ::compile() if
// the location was used by the MSL code.
void add_msl_vertex_attribute(const MSLVertexAttr &attr);
// resource is a resource binding to indicate the MSL buffer,
// texture or sampler index to use for a particular SPIR-V description set
// and binding. If resource bindings are provided,
// is_msl_resource_binding_used() will return true after calling ::compile() if
// the set/binding combination was used by the MSL code.
void add_msl_resource_binding(const MSLResourceBinding &resource);
// desc_set and binding are the SPIR-V descriptor set and binding of a buffer resource
// in this shader. index is the index within the dynamic offset buffer to use. This
// function marks that resource as using a dynamic offset (VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC
// or VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC). This function only has any effect if argument buffers
// are enabled. If so, the buffer will have its address adjusted at the beginning of the shader with
// an offset taken from the dynamic offset buffer.
void add_dynamic_buffer(uint32_t desc_set, uint32_t binding, uint32_t index);
// desc_set and binding are the SPIR-V descriptor set and binding of a buffer resource
// in this shader. This function marks that resource as an inline uniform block
// (VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT). This function only has any effect if argument buffers
// are enabled. If so, the buffer block will be directly embedded into the argument
// buffer, instead of being referenced indirectly via pointer.
void add_inline_uniform_block(uint32_t desc_set, uint32_t binding);
// When using MSL argument buffers, we can force "classic" MSL 1.0 binding schemes for certain descriptor sets.
// This corresponds to VK_KHR_push_descriptor in Vulkan.
void add_discrete_descriptor_set(uint32_t desc_set);
// If an argument buffer is large enough, it may need to be in the device storage space rather than
// constant. Opt-in to this behavior here on a per set basis.
void set_argument_buffer_device_address_space(uint32_t desc_set, bool device_storage);
// Query after compilation is done. This allows you to check if a location or set/binding combination was used by the shader.
bool is_msl_vertex_attribute_used(uint32_t location);
// NOTE: Only resources which are remapped using add_msl_resource_binding will be reported here.
// Constexpr samplers are always assumed to be emitted.
// No specific MSLResourceBinding remapping is required for constexpr samplers as long as they are remapped
// by remap_constexpr_sampler(_by_binding).
bool is_msl_resource_binding_used(spv::ExecutionModel model, uint32_t set, uint32_t binding) const;
// This must only be called after a successful call to CompilerMSL::compile().
// For a variable resource ID obtained through reflection API, report the automatically assigned resource index.
// If the descriptor set was part of an argument buffer, report the [[id(N)]],
// or [[buffer/texture/sampler]] binding for other resources.
// If the resource was a combined image sampler, report the image binding here,
// use the _secondary version of this call to query the sampler half of the resource.
// If no binding exists, uint32_t(-1) is returned.
uint32_t get_automatic_msl_resource_binding(uint32_t id) const;
// Same as get_automatic_msl_resource_binding, but should only be used for combined image samplers, in which case the
// sampler's binding is returned instead. For any other resource type, -1 is returned.
uint32_t get_automatic_msl_resource_binding_secondary(uint32_t id) const;
// Same as get_automatic_msl_resource_binding, but should only be used for combined image samplers for multiplanar images,
// in which case the second plane's binding is returned instead. For any other resource type, -1 is returned.
uint32_t get_automatic_msl_resource_binding_tertiary(uint32_t id) const;
// Same as get_automatic_msl_resource_binding, but should only be used for combined image samplers for triplanar images,
// in which case the third plane's binding is returned instead. For any other resource type, -1 is returned.
uint32_t get_automatic_msl_resource_binding_quaternary(uint32_t id) const;
// Compiles the SPIR-V code into Metal Shading Language.
std::string compile() override;
// Remap a sampler with ID to a constexpr sampler.
// Older iOS targets must use constexpr samplers in certain cases (PCF),
// so a static sampler must be used.
// The sampler will not consume a binding, but be declared in the entry point as a constexpr sampler.
// This can be used on both combined image/samplers (sampler2D) or standalone samplers.
// The remapped sampler must not be an array of samplers.
// Prefer remap_constexpr_sampler_by_binding unless you're also doing reflection anyways.
void remap_constexpr_sampler(VariableID id, const MSLConstexprSampler &sampler);
// Same as remap_constexpr_sampler, except you provide set/binding, rather than variable ID.
// Remaps based on ID take priority over set/binding remaps.
void remap_constexpr_sampler_by_binding(uint32_t desc_set, uint32_t binding, const MSLConstexprSampler &sampler);
// If using CompilerMSL::Options::pad_fragment_output_components, override the number of components we expect
// to use for a particular location. The default is 4 if number of components is not overridden.
void set_fragment_output_components(uint32_t location, uint32_t components);
protected:
// An enum of SPIR-V functions that are implemented in additional
// source code that is added to the shader if necessary.
enum SPVFuncImpl
{
SPVFuncImplNone,
SPVFuncImplMod,
SPVFuncImplRadians,
SPVFuncImplDegrees,
SPVFuncImplFindILsb,
SPVFuncImplFindSMsb,
SPVFuncImplFindUMsb,
SPVFuncImplSSign,
SPVFuncImplArrayCopyMultidimBase,
// Unfortunately, we cannot use recursive templates in the MSL compiler properly,
// so stamp out variants up to some arbitrary maximum.
SPVFuncImplArrayCopy = SPVFuncImplArrayCopyMultidimBase + 1,
SPVFuncImplArrayOfArrayCopy2Dim = SPVFuncImplArrayCopyMultidimBase + 2,
SPVFuncImplArrayOfArrayCopy3Dim = SPVFuncImplArrayCopyMultidimBase + 3,
SPVFuncImplArrayOfArrayCopy4Dim = SPVFuncImplArrayCopyMultidimBase + 4,
SPVFuncImplArrayOfArrayCopy5Dim = SPVFuncImplArrayCopyMultidimBase + 5,
SPVFuncImplArrayOfArrayCopy6Dim = SPVFuncImplArrayCopyMultidimBase + 6,
SPVFuncImplTexelBufferCoords,
SPVFuncImplImage2DAtomicCoords, // Emulate texture2D atomic operations
SPVFuncImplFMul,
SPVFuncImplFAdd,
SPVFuncImplCubemapTo2DArrayFace,
SPVFuncImplUnsafeArray, // Allow Metal to use the array<T> template to make arrays a value type
SPVFuncImplInverse4x4,
SPVFuncImplInverse3x3,
SPVFuncImplInverse2x2,
// It is very important that this come before *Swizzle and ChromaReconstruct*, to ensure it's
// emitted before them.
SPVFuncImplForwardArgs,
// Likewise, this must come before *Swizzle.
SPVFuncImplGetSwizzle,
SPVFuncImplTextureSwizzle,
SPVFuncImplGatherSwizzle,
SPVFuncImplGatherCompareSwizzle,
SPVFuncImplSubgroupBallot,
SPVFuncImplSubgroupBallotBitExtract,
SPVFuncImplSubgroupBallotFindLSB,
SPVFuncImplSubgroupBallotFindMSB,
SPVFuncImplSubgroupBallotBitCount,
SPVFuncImplSubgroupAllEqual,
SPVFuncImplReflectScalar,
SPVFuncImplRefractScalar,
SPVFuncImplFaceForwardScalar,
SPVFuncImplChromaReconstructNearest2Plane,
SPVFuncImplChromaReconstructNearest3Plane,
SPVFuncImplChromaReconstructLinear422CositedEven2Plane,
SPVFuncImplChromaReconstructLinear422CositedEven3Plane,
SPVFuncImplChromaReconstructLinear422Midpoint2Plane,
SPVFuncImplChromaReconstructLinear422Midpoint3Plane,
SPVFuncImplChromaReconstructLinear420XCositedEvenYCositedEven2Plane,
SPVFuncImplChromaReconstructLinear420XCositedEvenYCositedEven3Plane,
SPVFuncImplChromaReconstructLinear420XMidpointYCositedEven2Plane,
SPVFuncImplChromaReconstructLinear420XMidpointYCositedEven3Plane,
SPVFuncImplChromaReconstructLinear420XCositedEvenYMidpoint2Plane,
SPVFuncImplChromaReconstructLinear420XCositedEvenYMidpoint3Plane,
SPVFuncImplChromaReconstructLinear420XMidpointYMidpoint2Plane,
SPVFuncImplChromaReconstructLinear420XMidpointYMidpoint3Plane,
SPVFuncImplExpandITUFullRange,
SPVFuncImplExpandITUNarrowRange,
SPVFuncImplConvertYCbCrBT709,
SPVFuncImplConvertYCbCrBT601,
SPVFuncImplConvertYCbCrBT2020,
SPVFuncImplDynamicImageSampler,
SPVFuncImplArrayCopyMultidimMax = 6
};
// If the underlying resource has been used for comparison then duplicate loads of that resource must be too
// Use Metal's native frame-buffer fetch API for subpass inputs.
void emit_texture_op(const Instruction &i) override;
void emit_binary_unord_op(uint32_t result_type, uint32_t result_id, uint32_t op0, uint32_t op1, const char *op);
void emit_instruction(const Instruction &instr) override;
void emit_glsl_op(uint32_t result_type, uint32_t result_id, uint32_t op, const uint32_t *args,
uint32_t count) override;
void emit_spv_amd_shader_trinary_minmax_op(uint32_t result_type, uint32_t result_id, uint32_t op,
const uint32_t *args, uint32_t count) override;
void emit_header() override;
void emit_function_prototype(SPIRFunction &func, const Bitset &return_flags) override;
void emit_sampled_image_op(uint32_t result_type, uint32_t result_id, uint32_t image_id, uint32_t samp_id) override;
void emit_subgroup_op(const Instruction &i) override;
std::string to_texture_op(const Instruction &i, bool *forward,
SmallVector<uint32_t> &inherited_expressions) override;
void emit_fixup() override;
std::string to_struct_member(const SPIRType &type, uint32_t member_type_id, uint32_t index,
const std::string &qualifier = "");
void emit_struct_member(const SPIRType &type, uint32_t member_type_id, uint32_t index,
const std::string &qualifier = "", uint32_t base_offset = 0) override;
void emit_struct_padding_target(const SPIRType &type) override;
std::string type_to_glsl(const SPIRType &type, uint32_t id = 0) override;
// Allow Metal to use the array<T> template to make arrays a value type
std::string type_to_array_glsl(const SPIRType &type) override;
// Threadgroup arrays can't have a wrapper type
std::string variable_decl(const SPIRVariable &variable) override;
// GCC workaround of lambdas calling protected functions (for older GCC versions)
std::string variable_decl(const SPIRType &type, const std::string &name, uint32_t id = 0) override;
std::string image_type_glsl(const SPIRType &type, uint32_t id = 0) override;
std::string sampler_type(const SPIRType &type);
std::string builtin_to_glsl(spv::BuiltIn builtin, spv::StorageClass storage) override;
std::string to_func_call_arg(const SPIRFunction::Parameter &arg, uint32_t id) override;
std::string to_name(uint32_t id, bool allow_alias = true) const override;
std::string to_function_name(VariableID img, const SPIRType &imgtype, bool is_fetch, bool is_gather, bool is_proj,
bool has_array_offsets, bool has_offset, bool has_grad, bool has_dref, uint32_t lod,
uint32_t minlod) override;
std::string to_function_args(VariableID img, const SPIRType &imgtype, bool is_fetch, bool is_gather, bool is_proj,
uint32_t coord, uint32_t coord_components, uint32_t dref, uint32_t grad_x,
uint32_t grad_y, uint32_t lod, uint32_t coffset, uint32_t offset, uint32_t bias,
uint32_t comp, uint32_t sample, uint32_t minlod, bool *p_forward) override;
std::string to_initializer_expression(const SPIRVariable &var) override;
std::string unpack_expression_type(std::string expr_str, const SPIRType &type, uint32_t physical_type_id,
bool is_packed, bool row_major) override;
// Returns true for BuiltInSampleMask because gl_SampleMask[] is an array in SPIR-V, but [[sample_mask]] is a scalar in Metal.
bool builtin_translates_to_nonarray(spv::BuiltIn builtin) const override;
std::string bitcast_glsl_op(const SPIRType &result_type, const SPIRType &argument_type) override;
bool skip_argument(uint32_t id) const override;
std::string to_member_reference(uint32_t base, const SPIRType &type, uint32_t index, bool ptr_chain) override;
std::string to_qualifiers_glsl(uint32_t id) override;
void replace_illegal_names() override;
void declare_undefined_values() override;
void declare_constant_arrays();
// Constant arrays of non-primitive types (i.e. matrices) won't link properly into Metal libraries
void declare_complex_constant_arrays();
bool is_patch_block(const SPIRType &type);
bool is_non_native_row_major_matrix(uint32_t id) override;
bool member_is_non_native_row_major_matrix(const SPIRType &type, uint32_t index) override;
std::string convert_row_major_matrix(std::string exp_str, const SPIRType &exp_type, uint32_t physical_type_id,
bool is_packed) override;
void preprocess_op_codes();
void localize_global_variables();
void extract_global_variables_from_functions();
void mark_packable_structs();
void mark_as_packable(SPIRType &type);
std::unordered_map<uint32_t, std::set<uint32_t>> function_global_vars;
void extract_global_variables_from_function(uint32_t func_id, std::set<uint32_t> &added_arg_ids,
std::unordered_set<uint32_t> &global_var_ids,
std::unordered_set<uint32_t> &processed_func_ids);
uint32_t add_interface_block(spv::StorageClass storage, bool patch = false);
uint32_t add_interface_block_pointer(uint32_t ib_var_id, spv::StorageClass storage);
struct InterfaceBlockMeta
{
struct LocationMeta
{
uint32_t num_components = 0;
uint32_t ib_index = ~0u;
};
std::unordered_map<uint32_t, LocationMeta> location_meta;
bool strip_array = false;
};
void add_variable_to_interface_block(spv::StorageClass storage, const std::string &ib_var_ref, SPIRType &ib_type,
SPIRVariable &var, InterfaceBlockMeta &meta);
void add_composite_variable_to_interface_block(spv::StorageClass storage, const std::string &ib_var_ref,
SPIRType &ib_type, SPIRVariable &var, InterfaceBlockMeta &meta);
void add_plain_variable_to_interface_block(spv::StorageClass storage, const std::string &ib_var_ref,
SPIRType &ib_type, SPIRVariable &var, InterfaceBlockMeta &meta);
void add_plain_member_variable_to_interface_block(spv::StorageClass storage, const std::string &ib_var_ref,
SPIRType &ib_type, SPIRVariable &var, uint32_t index,
InterfaceBlockMeta &meta);
void add_composite_member_variable_to_interface_block(spv::StorageClass storage, const std::string &ib_var_ref,
SPIRType &ib_type, SPIRVariable &var, uint32_t index,
InterfaceBlockMeta &meta);
uint32_t get_accumulated_member_location(const SPIRVariable &var, uint32_t mbr_idx, bool strip_array);
void add_tess_level_input_to_interface_block(const std::string &ib_var_ref, SPIRType &ib_type, SPIRVariable &var);
void fix_up_interface_member_indices(spv::StorageClass storage, uint32_t ib_type_id);
void mark_location_as_used_by_shader(uint32_t location, spv::StorageClass storage);
uint32_t ensure_correct_builtin_type(uint32_t type_id, spv::BuiltIn builtin);
uint32_t ensure_correct_attribute_type(uint32_t type_id, uint32_t location, uint32_t num_components = 0);
void emit_custom_templates();
void emit_custom_functions();
void emit_resources();
void emit_specialization_constants_and_structs();
void emit_interface_block(uint32_t ib_var_id);
bool maybe_emit_array_assignment(uint32_t id_lhs, uint32_t id_rhs);
void fix_up_shader_inputs_outputs();
std::string func_type_decl(SPIRType &type);
std::string entry_point_args_classic(bool append_comma);
std::string entry_point_args_argument_buffer(bool append_comma);
std::string entry_point_arg_stage_in();
void entry_point_args_builtin(std::string &args);
void entry_point_args_discrete_descriptors(std::string &args);
std::string to_qualified_member_name(const SPIRType &type, uint32_t index);
std::string ensure_valid_name(std::string name, std::string pfx);
std::string to_sampler_expression(uint32_t id);
std::string to_swizzle_expression(uint32_t id);
std::string to_buffer_size_expression(uint32_t id);
std::string builtin_qualifier(spv::BuiltIn builtin);
std::string builtin_type_decl(spv::BuiltIn builtin, uint32_t id = 0);
std::string built_in_func_arg(spv::BuiltIn builtin, bool prefix_comma);
std::string member_attribute_qualifier(const SPIRType &type, uint32_t index);
std::string argument_decl(const SPIRFunction::Parameter &arg);
std::string round_fp_tex_coords(std::string tex_coords, bool coord_is_fp);
uint32_t get_metal_resource_index(SPIRVariable &var, SPIRType::BaseType basetype, uint32_t plane = 0);
uint32_t get_ordered_member_location(uint32_t type_id, uint32_t index, uint32_t *comp = nullptr);
// MSL packing rules. These compute the effective packing rules as observed by the MSL compiler in the MSL output.
// These values can change depending on various extended decorations which control packing rules.
// We need to make these rules match up with SPIR-V declared rules.
uint32_t get_declared_type_size_msl(const SPIRType &type, bool packed, bool row_major) const;
uint32_t get_declared_type_array_stride_msl(const SPIRType &type, bool packed, bool row_major) const;
uint32_t get_declared_type_matrix_stride_msl(const SPIRType &type, bool packed, bool row_major) const;
uint32_t get_declared_type_alignment_msl(const SPIRType &type, bool packed, bool row_major) const;
uint32_t get_declared_struct_member_size_msl(const SPIRType &struct_type, uint32_t index) const;
uint32_t get_declared_struct_member_array_stride_msl(const SPIRType &struct_type, uint32_t index) const;
uint32_t get_declared_struct_member_matrix_stride_msl(const SPIRType &struct_type, uint32_t index) const;
uint32_t get_declared_struct_member_alignment_msl(const SPIRType &struct_type, uint32_t index) const;
const SPIRType &get_physical_member_type(const SPIRType &struct_type, uint32_t index) const;
uint32_t get_declared_struct_size_msl(const SPIRType &struct_type, bool ignore_alignment = false,
bool ignore_padding = false) const;
std::string to_component_argument(uint32_t id);
void align_struct(SPIRType &ib_type, std::unordered_set<uint32_t> &aligned_structs);
void mark_scalar_layout_structs(const SPIRType &ib_type);
void mark_struct_members_packed(const SPIRType &type);
void ensure_member_packing_rules_msl(SPIRType &ib_type, uint32_t index);
bool validate_member_packing_rules_msl(const SPIRType &type, uint32_t index) const;
std::string get_argument_address_space(const SPIRVariable &argument);
std::string get_type_address_space(const SPIRType &type, uint32_t id, bool argument = false);
const char *to_restrict(uint32_t id, bool space = true);
SPIRType &get_stage_in_struct_type();
SPIRType &get_stage_out_struct_type();
SPIRType &get_patch_stage_in_struct_type();
SPIRType &get_patch_stage_out_struct_type();
std::string get_tess_factor_struct_name();
void emit_atomic_func_op(uint32_t result_type, uint32_t result_id, const char *op, uint32_t mem_order_1,
uint32_t mem_order_2, bool has_mem_order_2, uint32_t op0, uint32_t op1 = 0,
bool op1_is_pointer = false, bool op1_is_literal = false, uint32_t op2 = 0);
const char *get_memory_order(uint32_t spv_mem_sem);
void add_pragma_line(const std::string &line);
void add_typedef_line(const std::string &line);
void emit_barrier(uint32_t id_exe_scope, uint32_t id_mem_scope, uint32_t id_mem_sem);
void emit_array_copy(const std::string &lhs, uint32_t rhs_id, spv::StorageClass lhs_storage,
spv::StorageClass rhs_storage) override;
void build_implicit_builtins();
uint32_t build_constant_uint_array_pointer();
void emit_entry_point_declarations() override;
uint32_t builtin_frag_coord_id = 0;
uint32_t builtin_sample_id_id = 0;
uint32_t builtin_vertex_idx_id = 0;
uint32_t builtin_base_vertex_id = 0;
uint32_t builtin_instance_idx_id = 0;
uint32_t builtin_base_instance_id = 0;
uint32_t builtin_view_idx_id = 0;
uint32_t builtin_layer_id = 0;
uint32_t builtin_invocation_id_id = 0;
uint32_t builtin_primitive_id_id = 0;
uint32_t builtin_subgroup_invocation_id_id = 0;
uint32_t builtin_subgroup_size_id = 0;
uint32_t builtin_dispatch_base_id = 0;
uint32_t swizzle_buffer_id = 0;
uint32_t buffer_size_buffer_id = 0;
uint32_t view_mask_buffer_id = 0;
uint32_t dynamic_offsets_buffer_id = 0;
void bitcast_to_builtin_store(uint32_t target_id, std::string &expr, const SPIRType &expr_type) override;
void bitcast_from_builtin_load(uint32_t source_id, std::string &expr, const SPIRType &expr_type) override;
void emit_store_statement(uint32_t lhs_expression, uint32_t rhs_expression) override;
void analyze_sampled_image_usage();
bool emit_tessellation_access_chain(const uint32_t *ops, uint32_t length);
bool emit_tessellation_io_load(uint32_t result_type, uint32_t id, uint32_t ptr);
bool is_out_of_bounds_tessellation_level(uint32_t id_lhs);
void ensure_builtin(spv::StorageClass storage, spv::BuiltIn builtin);
void mark_implicit_builtin(spv::StorageClass storage, spv::BuiltIn builtin, uint32_t id);
std::string convert_to_f32(const std::string &expr, uint32_t components);
Options msl_options;
std::set<SPVFuncImpl> spv_function_implementations;
std::unordered_map<uint32_t, MSLVertexAttr> vtx_attrs_by_location;
std::unordered_map<uint32_t, MSLVertexAttr> vtx_attrs_by_builtin;
std::unordered_set<uint32_t> vtx_attrs_in_use;
std::unordered_map<uint32_t, uint32_t> fragment_output_components;
std::set<std::string> pragma_lines;
std::set<std::string> typedef_lines;
SmallVector<uint32_t> vars_needing_early_declaration;
std::unordered_map<StageSetBinding, std::pair<MSLResourceBinding, bool>, InternalHasher> resource_bindings;
uint32_t next_metal_resource_index_buffer = 0;
uint32_t next_metal_resource_index_texture = 0;
uint32_t next_metal_resource_index_sampler = 0;
// Intentionally uninitialized, works around MSVC 2013 bug.
uint32_t next_metal_resource_ids[kMaxArgumentBuffers];
VariableID stage_in_var_id = 0;
VariableID stage_out_var_id = 0;
VariableID patch_stage_in_var_id = 0;
VariableID patch_stage_out_var_id = 0;
VariableID stage_in_ptr_var_id = 0;
VariableID stage_out_ptr_var_id = 0;
// Handle HLSL-style 0-based vertex/instance index.
enum class TriState
{
Neutral,
No,
Yes
};
TriState needs_base_vertex_arg = TriState::Neutral;
TriState needs_base_instance_arg = TriState::Neutral;
bool has_sampled_images = false;
bool builtin_declaration = false; // Handle HLSL-style 0-based vertex/instance index.
bool use_builtin_array = false; // Force the use of C style array declaration.
bool is_rasterization_disabled = false;
bool capture_output_to_buffer = false;
bool needs_swizzle_buffer_def = false;
bool used_swizzle_buffer = false;
bool added_builtin_tess_level = false;
bool needs_subgroup_invocation_id = false;
std::string qual_pos_var_name;
std::string stage_in_var_name = "in";
std::string stage_out_var_name = "out";
std::string patch_stage_in_var_name = "patchIn";
std::string patch_stage_out_var_name = "patchOut";
std::string sampler_name_suffix = "Smplr";
std::string swizzle_name_suffix = "Swzl";
std::string buffer_size_name_suffix = "BufferSize";
std::string plane_name_suffix = "Plane";
std::string input_wg_var_name = "gl_in";
std::string output_buffer_var_name = "spvOut";
std::string patch_output_buffer_var_name = "spvPatchOut";
std::string tess_factor_buffer_var_name = "spvTessLevel";
spv::Op previous_instruction_opcode = spv::OpNop;
// Must be ordered since declaration is in a specific order.
std::map<uint32_t, MSLConstexprSampler> constexpr_samplers_by_id;
std::unordered_map<SetBindingPair, MSLConstexprSampler, InternalHasher> constexpr_samplers_by_binding;
const MSLConstexprSampler *find_constexpr_sampler(uint32_t id) const;
std::unordered_set<uint32_t> buffers_requiring_array_length;
SmallVector<uint32_t> buffer_arrays;
std::unordered_set<uint32_t> atomic_image_vars; // Emulate texture2D atomic operations
// Must be ordered since array is in a specific order.
std::map<SetBindingPair, std::pair<uint32_t, uint32_t>> buffers_requiring_dynamic_offset;
std::unordered_set<SetBindingPair, InternalHasher> inline_uniform_blocks;
uint32_t argument_buffer_ids[kMaxArgumentBuffers];
uint32_t argument_buffer_discrete_mask = 0;
uint32_t argument_buffer_device_storage_mask = 0;
void analyze_argument_buffers();
bool descriptor_set_is_argument_buffer(uint32_t desc_set) const;
uint32_t get_target_components_for_fragment_location(uint32_t location) const;
uint32_t build_extended_vector_type(uint32_t type_id, uint32_t components);
bool suppress_missing_prototypes = false;
void add_spv_func_and_recompile(SPVFuncImpl spv_func);
void activate_argument_buffer_resources();
// OpcodeHandler that handles several MSL preprocessing operations.
struct OpCodePreprocessor : OpcodeHandler
{
OpCodePreprocessor(CompilerMSL &compiler_)
: compiler(compiler_)
{
}
bool handle(spv::Op opcode, const uint32_t *args, uint32_t length) override;
CompilerMSL::SPVFuncImpl get_spv_func_impl(spv::Op opcode, const uint32_t *args);
void check_resource_write(uint32_t var_id);
CompilerMSL &compiler;
std::unordered_map<uint32_t, uint32_t> result_types;
std::unordered_map<uint32_t, uint32_t> image_pointers; // Emulate texture2D atomic operations
bool suppress_missing_prototypes = false;
bool uses_atomics = false;
bool uses_resource_write = false;
bool needs_subgroup_invocation_id = false;
};
// OpcodeHandler that scans for uses of sampled images
struct SampledImageScanner : OpcodeHandler
{
SampledImageScanner(CompilerMSL &compiler_)
: compiler(compiler_)
{
}
bool handle(spv::Op opcode, const uint32_t *args, uint32_t) override;
CompilerMSL &compiler;
};
// Sorts the members of a SPIRType and associated Meta info based on a settable sorting
// aspect, which defines which aspect of the struct members will be used to sort them.
// Regardless of the sorting aspect, built-in members always appear at the end of the struct.
struct MemberSorter
{
enum SortAspect
{
Location,
LocationReverse,
Offset,
OffsetThenLocationReverse,
Alphabetical
};
void sort();
bool operator()(uint32_t mbr_idx1, uint32_t mbr_idx2);
MemberSorter(SPIRType &t, Meta &m, SortAspect sa);
SPIRType &type;
Meta &meta;
SortAspect sort_aspect;
};
};
} // namespace SPIRV_CROSS_NAMESPACE
#endif
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