101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
// Copyright (c) 2015-2016 The Khronos Group Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_SPIRV_CONSTANT_H_
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#define SOURCE_SPIRV_CONSTANT_H_
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#include "source/latest_version_spirv_header.h"
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#include "spirv-tools/libspirv.h"
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// Version number macros.
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// Evaluates to a well-formed version header word, given valid
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// SPIR-V version major and minor version numbers.
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#define SPV_SPIRV_VERSION_WORD(MAJOR, MINOR) \
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((uint32_t(uint8_t(MAJOR)) << 16) | (uint32_t(uint8_t(MINOR)) << 8))
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// Returns the major version extracted from a version header word.
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#define SPV_SPIRV_VERSION_MAJOR_PART(WORD) ((uint32_t(WORD) >> 16) & 0xff)
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// Returns the minor version extracted from a version header word.
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#define SPV_SPIRV_VERSION_MINOR_PART(WORD) ((uint32_t(WORD) >> 8) & 0xff)
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// Header indices
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#define SPV_INDEX_MAGIC_NUMBER 0u
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#define SPV_INDEX_VERSION_NUMBER 1u
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#define SPV_INDEX_GENERATOR_NUMBER 2u
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#define SPV_INDEX_BOUND 3u
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#define SPV_INDEX_SCHEMA 4u
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#define SPV_INDEX_INSTRUCTION 5u
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// Universal limits
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// SPIR-V 1.0 limits
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#define SPV_LIMIT_INSTRUCTION_WORD_COUNT_MAX 0xffff
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#define SPV_LIMIT_LITERAL_STRING_UTF8_CHARS_MAX 0xffff
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// A single Unicode character in UTF-8 encoding can take
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// up 4 bytes.
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#define SPV_LIMIT_LITERAL_STRING_BYTES_MAX \
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(SPV_LIMIT_LITERAL_STRING_UTF8_CHARS_MAX * 4)
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// NOTE: These are set to the minimum maximum values
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// TODO(dneto): Check these.
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// libspirv limits.
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#define SPV_LIMIT_RESULT_ID_BOUND 0x00400000
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#define SPV_LIMIT_CONTROL_FLOW_NEST_DEPTH 0x00000400
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#define SPV_LIMIT_GLOBAL_VARIABLES_MAX 0x00010000
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#define SPV_LIMIT_LOCAL_VARIABLES_MAX 0x00080000
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// TODO: Decorations per target ID max, depends on decoration table size
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#define SPV_LIMIT_EXECUTION_MODE_PER_ENTRY_POINT_MAX 0x00000100
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#define SPV_LIMIT_INDICIES_MAX_ACCESS_CHAIN_COMPOSITE_MAX 0x00000100
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#define SPV_LIMIT_FUNCTION_PARAMETERS_PER_FUNCTION_DECL 0x00000100
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#define SPV_LIMIT_FUNCTION_CALL_ARGUMENTS_MAX 0x00000100
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#define SPV_LIMIT_EXT_FUNCTION_CALL_ARGUMENTS_MAX 0x00000100
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#define SPV_LIMIT_SWITCH_LITERAL_LABEL_PAIRS_MAX 0x00004000
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#define SPV_LIMIT_STRUCT_MEMBERS_MAX 0x0000400
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#define SPV_LIMIT_STRUCT_NESTING_DEPTH_MAX 0x00000100
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// Enumerations
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// Values mapping to registered tools. See the registry at
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// https://www.khronos.org/registry/spir-v/api/spir-v.xml
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// These values occupy the higher order 16 bits of the generator magic word.
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typedef enum spv_generator_t {
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// TODO(dneto) Values 0 through 5 were registered only as vendor.
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SPV_GENERATOR_KHRONOS = 0,
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SPV_GENERATOR_LUNARG = 1,
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SPV_GENERATOR_VALVE = 2,
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SPV_GENERATOR_CODEPLAY = 3,
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SPV_GENERATOR_NVIDIA = 4,
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SPV_GENERATOR_ARM = 5,
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// These are vendor and tool.
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SPV_GENERATOR_KHRONOS_LLVM_TRANSLATOR = 6,
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SPV_GENERATOR_KHRONOS_ASSEMBLER = 7,
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SPV_GENERATOR_KHRONOS_GLSLANG = 8,
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SPV_GENERATOR_NUM_ENTRIES,
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SPV_FORCE_16_BIT_ENUM(spv_generator_t)
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} spv_generator_t;
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// Evaluates to a well-formed generator magic word from a tool value and
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// miscellaneous 16-bit value.
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#define SPV_GENERATOR_WORD(TOOL, MISC) \
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((uint32_t(uint16_t(TOOL)) << 16) | uint16_t(MISC))
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// Returns the tool component of the generator word.
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#define SPV_GENERATOR_TOOL_PART(WORD) (uint32_t(WORD) >> 16)
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// Returns the misc part of the generator word.
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#define SPV_GENERATOR_MISC_PART(WORD) (uint32_t(WORD) & 0xFFFF)
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#endif // SOURCE_SPIRV_CONSTANT_H_
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