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Code Issues Releases Activity

Add support for TEST instruction

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This commit is contained in:
bird_egop
2025-04-12 19:26:00 +03:00
parent ae1c4730d0
commit cedd7a931e
5 changed files with 258 additions and 1 deletions
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25
X86Disassembler/X86/OpcodeMap.cs
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@ -19,6 +19,11 @@ public class OpcodeMap
"add", "or", "adc", "sbb", "and", "sub", "xor", "cmp"
};
// Group 3 operations (used with opcodes 0xF6, 0xF7)
public static readonly string[] Group3Operations = {
"test", "???", "not", "neg", "mul", "imul", "div", "idiv"
};
// Static constructor to initialize the opcode maps
static OpcodeMap()
{
@ -51,6 +56,16 @@ public class OpcodeMap
OneByteOpcodes[0x81] = "group1d";
OneByteOpcodes[0x83] = "group1s"; // Sign-extended immediate
// Group 3 instructions (TEST, NOT, NEG, MUL, IMUL, DIV, IDIV)
OneByteOpcodes[0xF6] = "group3b"; // 8-bit operations
OneByteOpcodes[0xF7] = "group3d"; // 32-bit operations
// TEST instructions
OneByteOpcodes[0x84] = "test"; // TEST r/m8, r8
OneByteOpcodes[0x85] = "test"; // TEST r/m32, r32
OneByteOpcodes[0xA8] = "test"; // TEST AL, imm8
OneByteOpcodes[0xA9] = "test"; // TEST EAX, imm32
// Data transfer instructions
for (int i = 0x88; i <= 0x8B; i++)
{
@ -125,6 +140,16 @@ public class OpcodeMap
return opcode == 0x80 || opcode == 0x81 || opcode == 0x83;
}
/// <summary>
/// Checks if the opcode is a Group 3 opcode
/// </summary>
/// <param name="opcode">The opcode to check</param>
/// <returns>True if the opcode is a Group 3 opcode</returns>
public static bool IsGroup3Opcode(byte opcode)
{
return opcode == 0xF6 || opcode == 0xF7;
}
/// <summary>
/// Checks if the opcode is a floating-point instruction
/// </summary>