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100 lines
4.1 KiB
C++
100 lines
4.1 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_ASSEMBLY_GRAMMAR_H_
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#define SOURCE_ASSEMBLY_GRAMMAR_H_
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#include "source/enum_set.h"
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#include "source/latest_version_spirv_header.h"
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#include "source/operand.h"
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#include "source/table.h"
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#include "source/util/span.h"
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#include "spirv-tools/libspirv.h"
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namespace spvtools {
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// Encapsulates the grammar to use for SPIR-V assembly.
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// Contains methods to query for valid instructions and operands.
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class AssemblyGrammar {
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public:
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explicit AssemblyGrammar(const spv_const_context context)
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: target_env_(context->target_env) {}
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// Returns the SPIR-V target environment.
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spv_target_env target_env() const { return target_env_; }
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// Removes capabilities not available in the current target environment and
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// returns the rest.
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// TODO(crbug.com/266223071) Remove this.
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CapabilitySet filterCapsAgainstTargetEnv(const spv::Capability* cap_array,
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uint32_t count) const;
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// Removes capabilities not available in the current target environment and
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// returns the rest.
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CapabilitySet filterCapsAgainstTargetEnv(
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const spvtools::utils::Span<const spv::Capability>& caps) const {
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return filterCapsAgainstTargetEnv(caps.begin(),
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static_cast<uint32_t>(caps.size()));
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}
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// Finds operand entry in the grammar table and returns its name.
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// Returns "Unknown" if not found.
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const char* lookupOperandName(spv_operand_type_t type,
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uint32_t operand) const;
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// Finds the opcode for the given OpSpecConstantOp opcode name. The name
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// should not have the "Op" prefix. For example, "IAdd" corresponds to
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// the integer add opcode for OpSpecConstantOp. On success, returns
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// SPV_SUCCESS and sends the discovered operation code through the opcode
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// parameter. On failure, returns SPV_ERROR_INVALID_LOOKUP.
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spv_result_t lookupSpecConstantOpcode(const char* name,
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spv::Op* opcode) const;
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// Returns SPV_SUCCESS if the given opcode is valid as the opcode operand
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// to OpSpecConstantOp.
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spv_result_t lookupSpecConstantOpcode(spv::Op opcode) const;
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// Parses a mask expression string for the given operand type.
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//
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// A mask expression is a sequence of one or more terms separated by '|',
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// where each term is a named enum value for a given type. No whitespace
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// is permitted.
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//
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// On success, the value is written to pValue, and SPV_SUCCESS is returned.
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// The operand type is defined by the type parameter, and the text to be
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// parsed is defined by the textValue parameter.
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spv_result_t parseMaskOperand(const spv_operand_type_t type,
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const char* textValue, uint32_t* pValue) const;
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// Inserts the operands expected after the given typed mask onto the end
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// of the given pattern.
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//
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// Each set bit in the mask represents zero or more operand types that
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// should be appended onto the pattern. Operands for a less significant
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// bit must always match before operands for a more significant bit, so
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// the operands for a less significant bit must appear closer to the end
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// of the pattern stack.
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//
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// If a set bit is unknown, then we assume it has no operands.
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void pushOperandTypesForMask(const spv_operand_type_t type,
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const uint32_t mask,
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spv_operand_pattern_t* pattern) const;
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private:
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const spv_target_env target_env_;
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};
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} // namespace spvtools
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#endif // SOURCE_ASSEMBLY_GRAMMAR_H_
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