AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

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AMD64 Technology 26568—Rev. 3.05—September 2003 rFLAGS Affected None MXCSR Flags Affected None Exceptions Exception Real Invalid opcode, #UD X X 340 PUNPCKLWD Virtual 8086 Protected Cause of Exception X X X X The SSE2 instructions are not supported, as indicated by bit 26 of CPUID standard function 1. The emulate bit (EM) of CR0 was set to 1. X X X The operating-system FXSAVE/FXRSTOR support bit (OSFXSR) of CR4 is cleared to 0. Device not available, #NM X X X The task-switch bit (TS) of CR0 was set to 1. Stack, #SS X X X A memory address exceeded the stack segment limit or was non-canonical. General protection, #GP X X X X A memory address exceeded a data segment limit or was non-canonical. A null data segment was used to reference memory. X X X The memory operand was not aligned on a 16-byte boundary. Page fault, #PF X X A page fault resulted from the execution of the instruction.
26568—Rev. 3.05—September 2003 AMD64 Technology PXOR Packed Logical Bitwise Exclusive OR Performs a bitwise exclusive OR of the values in the first and second source operands and writes the result in the destination (first source). The first source/destination operand is an XMM register and the second source operand is another XMM register or 128-bit memory location. Mnemonic Opcode Description PXOR xmm1, xmm2/mem128 66 0F EF /r Performs bitwise logical XOR of values in an XMM register and in another XMM register or 128-bit memory location and writes the result in the destination XMM register. Related Instructions PAND, PANDN, POR rFLAGS Affected None MXCSR Flags Affected None xmm1 xmm2/mem128 127 0 XOR 127 0 pxor-128.eps PXOR 341
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