diff options
Diffstat (limited to 'lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h')
| -rw-r--r-- | lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h | 108 |
1 files changed, 41 insertions, 67 deletions
diff --git a/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h b/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h index 3ae1610179..abe4bc2ff9 100644 --- a/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h +++ b/lib/Target/X86/Disassembler/X86DisassemblerDecoderCommon.h @@ -42,11 +42,9 @@ namespace X86Disassembler { #define XOP9_MAP_STR "x86DisassemblerXOP9Opcodes" #define XOPA_MAP_STR "x86DisassemblerXOPAOpcodes" -/* - * Attributes of an instruction that must be known before the opcode can be - * processed correctly. Most of these indicate the presence of particular - * prefixes, but ATTR_64BIT is simply an attribute of the decoding context. - */ +// Attributes of an instruction that must be known before the opcode can be +// processed correctly. Most of these indicate the presence of particular +// prefixes, but ATTR_64BIT is simply an attribute of the decoding context. #define ATTRIBUTE_BITS \ ENUM_ENTRY(ATTR_NONE, 0x00) \ ENUM_ENTRY(ATTR_64BIT, (0x1 << 0)) \ @@ -71,13 +69,11 @@ enum attributeBits { }; #undef ENUM_ENTRY -/* - * Combinations of the above attributes that are relevant to instruction - * decode. Although other combinations are possible, they can be reduced to - * these without affecting the ultimately decoded instruction. - */ +// Combinations of the above attributes that are relevant to instruction +// decode. Although other combinations are possible, they can be reduced to +// these without affecting the ultimately decoded instruction. -/* Class name Rank Rationale for rank assignment */ +// Class name Rank Rationale for rank assignment #define INSTRUCTION_CONTEXTS \ ENUM_ENTRY(IC, 0, "says nothing about the instruction") \ ENUM_ENTRY(IC_64BIT, 1, "says the instruction applies in " \ @@ -278,10 +274,8 @@ enum InstructionContext { }; #undef ENUM_ENTRY -/* - * Opcode types, which determine which decode table to use, both in the Intel - * manual and also for the decoder. - */ +// Opcode types, which determine which decode table to use, both in the Intel +// manual and also for the decoder. enum OpcodeType { ONEBYTE = 0, TWOBYTE = 1, @@ -292,37 +286,31 @@ enum OpcodeType { XOPA_MAP = 6 }; -/* - * The following structs are used for the hierarchical decode table. After - * determining the instruction's class (i.e., which IC_* constant applies to - * it), the decoder reads the opcode. Some instructions require specific - * values of the ModR/M byte, so the ModR/M byte indexes into the final table. - * - * If a ModR/M byte is not required, "required" is left unset, and the values - * for each instructionID are identical. - */ - +// The following structs are used for the hierarchical decode table. After +// determining the instruction's class (i.e., which IC_* constant applies to +// it), the decoder reads the opcode. Some instructions require specific +// values of the ModR/M byte, so the ModR/M byte indexes into the final table. +// +// If a ModR/M byte is not required, "required" is left unset, and the values +// for each instructionID are identical. typedef uint16_t InstrUID; -/* - * ModRMDecisionType - describes the type of ModR/M decision, allowing the - * consumer to determine the number of entries in it. - * - * MODRM_ONEENTRY - No matter what the value of the ModR/M byte is, the decoded - * instruction is the same. - * MODRM_SPLITRM - If the ModR/M byte is between 0x00 and 0xbf, the opcode - * corresponds to one instruction; otherwise, it corresponds to - * a different instruction. - * MODRM_SPLITMISC- If the ModR/M byte is between 0x00 and 0xbf, ModR/M byte - * divided by 8 is used to select instruction; otherwise, each - * value of the ModR/M byte could correspond to a different - * instruction. - * MODRM_SPLITREG - ModR/M byte divided by 8 is used to select instruction. This - corresponds to instructions that use reg field as opcode - * MODRM_FULL - Potentially, each value of the ModR/M byte could correspond - * to a different instruction. - */ - +// ModRMDecisionType - describes the type of ModR/M decision, allowing the +// consumer to determine the number of entries in it. +// +// MODRM_ONEENTRY - No matter what the value of the ModR/M byte is, the decoded +// instruction is the same. +// MODRM_SPLITRM - If the ModR/M byte is between 0x00 and 0xbf, the opcode +// corresponds to one instruction; otherwise, it corresponds to +// a different instruction. +// MODRM_SPLITMISC- If the ModR/M byte is between 0x00 and 0xbf, ModR/M byte +// divided by 8 is used to select instruction; otherwise, each +// value of the ModR/M byte could correspond to a different +// instruction. +// MODRM_SPLITREG - ModR/M byte divided by 8 is used to select instruction. This +// corresponds to instructions that use reg field as opcode +// MODRM_FULL - Potentially, each value of the ModR/M byte could correspond +// to a different instruction. #define MODRMTYPES \ ENUM_ENTRY(MODRM_ONEENTRY) \ ENUM_ENTRY(MODRM_SPLITRM) \ @@ -337,10 +325,7 @@ enum ModRMDecisionType { }; #undef ENUM_ENTRY -/* - * Physical encodings of instruction operands. - */ - +// Physical encodings of instruction operands. #define ENCODINGS \ ENUM_ENTRY(ENCODING_NONE, "") \ ENUM_ENTRY(ENCODING_REG, "Register operand in ModR/M byte.") \ @@ -381,10 +366,7 @@ enum OperandEncoding { }; #undef ENUM_ENTRY -/* - * Semantic interpretations of instruction operands. - */ - +// Semantic interpretations of instruction operands. #define TYPES \ ENUM_ENTRY(TYPE_NONE, "") \ ENUM_ENTRY(TYPE_REL8, "1-byte immediate address") \ @@ -481,20 +463,14 @@ enum OperandType { }; #undef ENUM_ENTRY -/* - * OperandSpecifier - The specification for how to extract and interpret one - * operand. - */ +/// \brief The specification for how to extract and interpret one operand. struct OperandSpecifier { uint8_t encoding; uint8_t type; }; -/* - * Indicates where the opcode modifier (if any) is to be found. Extended - * opcodes with AddRegFrm have the opcode modifier in the ModR/M byte. - */ - +// Indicates where the opcode modifier (if any) is to be found. Extended +// opcodes with AddRegFrm have the opcode modifier in the ModR/M byte. #define MODIFIER_TYPES \ ENUM_ENTRY(MODIFIER_NONE) @@ -505,13 +481,11 @@ enum ModifierType { }; #undef ENUM_ENTRY -#define X86_MAX_OPERANDS 5 +static const int X86_MAX_OPERANDS = 5; -/* - * Decoding mode for the Intel disassembler. 16-bit, 32-bit, and 64-bit mode - * are supported, and represent real mode, IA-32e, and IA-32e in 64-bit mode, - * respectively. - */ +/// Decoding mode for the Intel disassembler. 16-bit, 32-bit, and 64-bit mode +/// are supported, and represent real mode, IA-32e, and IA-32e in 64-bit mode, +/// respectively. enum DisassemblerMode { MODE_16BIT, MODE_32BIT, |