Intel® Extended Memory 64 Technology Software Developer's Guide

BOUND—Check Array Index Against BoundsOpcode Instruction 64-Bit Mode Compat/Leg DescriptionMode62 /r BOUND r16, m16&16 Inv. Valid Check if r16 (array index) is within boundsspecified by m16&1662 /r BOUND r32, m32&32 Inv. Valid Check if r32 (array index) is within boundsspecified by m16&16Flags AffectedNone.IA-32e Mode OperationInstruction is invalid in 64-bit mode.Protected Mode Exceptions#BR#UD#GP(0)#SS(0)#PF(fault-code)#AC(0)If the bounds test fails.If second operand is not a memory location.If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.If the DS, ES, FS, or GS register contains a null segment selector.If a memory operand effective address is outside the SS segment limit.If a page fault occurs.If alignment checking is enabled and an unaligned memory reference is made while thecurrent privilege level is 3.Real-Address Mode Exceptions#BR#UD#GP#SSIf the bounds test fails.If second operand is not a memory location.If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.If a memory operand effective address is outside the SS segment limit.Virtual-8086 Mode Exceptions#BR#UD#GP(0)#SS(0)#PF(fault-code)#AC(0)If the bounds test fails.If second operand is not a memory location.If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.If a memory operand effective address is outside the SS segment limit.If a page fault occurs.If alignment checking is enabled and an unaligned memory reference is made.Compatibility Mode ExceptionsSame as protected mode exceptions.2-42 Vol. 1