| // Copyright (c) 2015-2016 The Khronos Group Inc. |
| // |
| // 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 SOURCE_OPERAND_H_ |
| #define SOURCE_OPERAND_H_ |
| |
| #include <functional> |
| #include <vector> |
| |
| #include "source/table.h" |
| #include "spirv-tools/libspirv.h" |
| |
| // A sequence of operand types. |
| // |
| // A SPIR-V parser uses an operand pattern to describe what is expected |
| // next on the input. |
| // |
| // As we parse an instruction in text or binary form from left to right, |
| // we pop and push at the end of the pattern vector. Symbols later in the |
| // pattern vector are matched against the input before symbols earlier in the |
| // pattern vector are matched. |
| |
| // Using a vector in this way reduces memory traffic, which is good for |
| // performance. |
| using spv_operand_pattern_t = std::vector<spv_operand_type_t>; |
| |
| // Finds the named operand in the table. The type parameter specifies the |
| // operand's group. A handle of the operand table entry for this operand will |
| // be written into *entry. |
| spv_result_t spvOperandTableNameLookup(spv_target_env, |
| const spv_operand_table table, |
| const spv_operand_type_t type, |
| const char* name, |
| const size_t name_length, |
| spv_operand_desc* entry); |
| |
| // Finds the operand with value in the table. The type parameter specifies the |
| // operand's group. A handle of the operand table entry for this operand will |
| // be written into *entry. |
| spv_result_t spvOperandTableValueLookup(spv_target_env, |
| const spv_operand_table table, |
| const spv_operand_type_t type, |
| const uint32_t value, |
| spv_operand_desc* entry); |
| |
| // Gets the name string of the non-variable operand type. |
| const char* spvOperandTypeStr(spv_operand_type_t type); |
| |
| // Returns true if an operand of the given type is optional. |
| bool spvOperandIsOptional(spv_operand_type_t type); |
| |
| // Returns true if an operand type represents zero or more logical operands. |
| // |
| // Note that a single logical operand may still be a variable number of words. |
| // For example, a literal string may be many words, but is just one logical |
| // operand. |
| bool spvOperandIsVariable(spv_operand_type_t type); |
| |
| // Append a list of operand types to the end of the pattern vector. |
| // The types parameter specifies the source array of types, ending with |
| // SPV_OPERAND_TYPE_NONE. |
| void spvPushOperandTypes(const spv_operand_type_t* types, |
| spv_operand_pattern_t* pattern); |
| |
| // Appends the operands expected after the given typed mask onto the |
| // end of the given pattern. |
| // |
| // Each set bit in the mask represents zero or more operand types that should |
| // be appended onto the pattern. Operands for a less significant bit always |
| // appear after operands for a more significant bit. |
| // |
| // If a set bit is unknown, then we assume it has no operands. |
| void spvPushOperandTypesForMask(spv_target_env, |
| const spv_operand_table operand_table, |
| const spv_operand_type_t mask_type, |
| const uint32_t mask, |
| spv_operand_pattern_t* pattern); |
| |
| // Expands an operand type representing zero or more logical operands, |
| // exactly once. |
| // |
| // If the given type represents potentially several logical operands, |
| // then prepend the given pattern with the first expansion of the logical |
| // operands, followed by original type. Otherwise, don't modify the pattern. |
| // |
| // For example, the SPV_OPERAND_TYPE_VARIABLE_ID represents zero or more |
| // IDs. In that case we would prepend the pattern with SPV_OPERAND_TYPE_ID |
| // followed by SPV_OPERAND_TYPE_VARIABLE_ID again. |
| // |
| // This also applies to zero or more tuples of logical operands. In that case |
| // we prepend pattern with for the members of the tuple, followed by the |
| // original type argument. The pattern must encode the fact that if any part |
| // of the tuple is present, then all tuple members should be. So the first |
| // member of the tuple must be optional, and the remaining members |
| // non-optional. |
| // |
| // Returns true if we modified the pattern. |
| bool spvExpandOperandSequenceOnce(spv_operand_type_t type, |
| spv_operand_pattern_t* pattern); |
| |
| // Expands the first element in the pattern until it is a matchable operand |
| // type, then pops it off the front and returns it. The pattern must not be |
| // empty. |
| // |
| // A matchable operand type is anything other than a zero-or-more-items |
| // operand type. |
| spv_operand_type_t spvTakeFirstMatchableOperand(spv_operand_pattern_t* pattern); |
| |
| // Calculates the corresponding post-immediate alternate pattern, which allows |
| // a limited set of operand types. |
| spv_operand_pattern_t spvAlternatePatternFollowingImmediate( |
| const spv_operand_pattern_t& pattern); |
| |
| // Is the operand an ID? |
| bool spvIsIdType(spv_operand_type_t type); |
| |
| // Is the operand an input ID? |
| bool spvIsInIdType(spv_operand_type_t type); |
| |
| // Takes the opcode of an instruction and returns |
| // a function object that will return true if the index |
| // of the operand can be forward declared. This function will |
| // used in the SSA validation stage of the pipeline |
| std::function<bool(unsigned)> spvOperandCanBeForwardDeclaredFunction( |
| spv::Op opcode); |
| |
| // Takes the instruction key of a debug info extension instruction |
| // and returns a function object that will return true if the index |
| // of the operand can be forward declared. This function will |
| // used in the SSA validation stage of the pipeline |
| std::function<bool(unsigned)> spvDbgInfoExtOperandCanBeForwardDeclaredFunction( |
| spv_ext_inst_type_t ext_type, uint32_t key); |
| |
| #endif // SOURCE_OPERAND_H_ |