x86 Instruction Set Reference

# MOVAPS

# Move Aligned Packed Single-Precision Floating-Point Values

Opcode Mnemonic Description
0F 28 /r MOVAPS xmm1, xmm2/m128 Move packed single-precision floating-point values from xmm2/m128 to xmm1.
0F 29 /r MOVAPS xmm2/m128, xmm1 Move packed single-precision floating-point values from xmm1 to xmm2/m128.

# Description

Moves a double quadword containing four packed single-precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load an XMM register from a 128-bit memory location, to store the contents of an XMM register into a 128-bit memory location, or to move data between two XMM registers.

When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) is generated.

To move packed single-precision floating-point values to or from unaligned memory locations, use the MOVUPS instruction.

# Operation

Destination = Source;
//#GP if Source or Destination unaligned memory operand
1
2
3

# 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 0F3n/0F2n 0F2n
MOVAPS xmm, xmm 6/6 1/1 FP_MOVE

← MOVD →