1 // Copyright (c) 2015-2016 The Khronos Group Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #ifndef SOURCE_INSTRUCTION_H_
16 #define SOURCE_INSTRUCTION_H_
17
18 #include <cstdint>
19 #include <vector>
20
21 #include "source/latest_version_spirv_header.h"
22 #include "spirv-tools/libspirv.h"
23
24 // Describes an instruction.
25 struct spv_instruction_t {
26 // Normally, both opcode and extInstType contain valid data.
27 // However, when the assembler parses !<number> as the first word in
28 // an instruction and opcode and extInstType are invalid.
29 SpvOp opcode;
30 spv_ext_inst_type_t extInstType;
31
32 // The Id of the result type, if this instruction has one. Zero otherwise.
33 uint32_t resultTypeId;
34
35 // The instruction, as a sequence of 32-bit words.
36 // For a regular instruction the opcode and word count are combined
37 // in words[0], as described in the SPIR-V spec.
38 // Otherwise, the first token was !<number>, and that number appears
39 // in words[0]. Subsequent elements are the result of parsing
40 // tokens in the alternate parsing mode as described in syntax.md.
41 std::vector<uint32_t> words;
42 };
43
44 // Appends a word to an instruction, without checking for overflow.
spvInstructionAddWord(spv_instruction_t * inst,uint32_t value)45 inline void spvInstructionAddWord(spv_instruction_t* inst, uint32_t value) {
46 inst->words.push_back(value);
47 }
48
49 #endif // SOURCE_INSTRUCTION_H_
50