x86 Instruction Set Reference

# ANDNPS

# Bitwise Logical AND NOT of Packed Single-Precision Floating-Point Values

Opcode Mnemonic Description
0F 55 /r ANDNPS xmm1, xmm2/m128 Bitwise logical AND NOT of xmm2/m128 and xmm1.

# Description

Inverts the bits of the four packed single-precision floating-point values in the destination operand (first operand), performs a bitwise logical AND of the four packed single-precision floating-point values in the source operand (second operand) and the temporary inverted result, and stores the result in the destination operand. The source operand can be an XMM register or a 128-bit memory location. The destination operand is an XMM register.

# Operation

Destination[0..127] = ~Destination[0..127] & Source[0..127];
1
2

# SIMD Floating-Point Exceptions

None.

# Protected Mode Exceptions
#GP(0) For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#GP(0) For an illegal memory operand effective address in the CS, DS, ES, FS or GS segments. If a memory operand is not aligned on a 16-byte boundary, regardless of segment.
#SS(0) For an illegal address in the SS segment.
#PF(fault-code) For a page fault.
#NM If TS in CR0 is set.

# Real-Address Mode Exceptions
#GP(0) If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#GP(0) If a memory operand is not aligned on a 16-byte boundary, regardless of segment. If any part of the operand lies outside the effective address space from 0 to FFFFH.
#NM If TS in CR0 is set.

# Virtual-8086 Mode Exceptions

Same exceptions as in Real Address Mode
#PF(fault-code) For a page fault.
Instruction Latency Throughput Execution Unit
CPUID 0F3n/0F2n/069n 0F3n/0F2n/069n 0F2n
ANDNPS xmm, xmm 4/4/2 2/2/2 MMX_ALU

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