x86-64 opcodes
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x86-64 instruction set pdf

The ud2 instruction is a "valid instruction" and it stands for Undefined Instruction and generates an invalid opcode exception clang andInstruction is only available when in 64-bit mode. d64. When in 64-bit mode, instruction defaults to 64-bit operand size and cannot encode 32-bit operand The x86 instruction set refers to the set of instructions that x86-compatible is referred to as (32-bit) x86 and (64-bit) x86-64 (also known as AMD64). SIMD floating-point exception when the OSXMMEXCPT bit in control register CR4 is clear (0). •. Executed a UD2 instruction. Note that even though it is the This instruction's operation is the same in non-64-bit modes and 64-bit mode. Operation ¶. #UD (* Generates invalid opcode exception *);. Flags Affected ¶. None