SPIRV-Tools/source/instruction.h
Andrew Woloszyn 537e77663d Added tracking to types and validated certain instructions.
We need to know how to generate correct SPIRV for cases like
OpConstant %int64 42 since the current parser will encode the 42 as a
32-bit value incorrectly.

This change is the first of a pair. This one tracks types, and makes
sure that OpConstant and OpSpecConstant are only ever called with
Integer or Float types, and OpSwitch is only called with integer
generating values.
2015-10-26 12:55:33 -04:00

61 lines
2.5 KiB
C++

// Copyright (c) 2015 The Khronos Group Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and/or associated documentation files (the
// "Materials"), to deal in the Materials without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Materials, and to
// permit persons to whom the Materials are furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Materials.
//
// MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS
// KHRONOS STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS
// SPECIFICATIONS AND HEADER INFORMATION ARE LOCATED AT
// https://www.khronos.org/registry/
//
// THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
#ifndef _LIBSPIRV_UTIL_INSTRUCTION_H_
#define _LIBSPIRV_UTIL_INSTRUCTION_H_
#include <cstdint>
#include <vector>
#include <headers/spirv.hpp>
// Describes an instruction.
struct spv_instruction_t {
// Normally, both opcode and extInstType contain valid data.
// However, when the assembler parses !<number> as the first word in
// an instruction and opcode and extInstType are invalid.
Op opcode;
spv_ext_inst_type_t extInstType;
// The Id of the result type, if this instruction has one. Zero otherwise.
uint32_t resultTypeId;
// The instruction, as a sequence of 32-bit words.
// For a regular instruction the opcode and word count are combined
// in words[0], as described in the SPIR-V spec.
// Otherwise, the first token was !<number>, and that number appears
// in words[0]. Subsequent elements are the result of parsing
// tokens in the alternate parsing mode as described in syntax.md.
std::vector<uint32_t> words;
};
// Appends a word to an instruction, without checking for overflow.
inline void spvInstructionAddWord(spv_instruction_t* inst, uint32_t value) {
inst->words.push_back(value);
}
#endif // _LIBSPIRV_UTIL_INSTRUCTION_H_