MOVHPD

In the x86 assembly programming language, MOVHPD is the name for a specific action performable by modern x86 processors with 2nd-generation Streaming SIMD Extensions (SSE2). This action involves either copying a number from memory to temporary space or copying a number from temporary space to memory.

Specifically, MOVHPD causes the value at an 8-byte memory region to be either copied to or assigned from the upper half of an XMM register.

Usage

The source operand can be either an XMM register ("xmm") or a memory address ("m64"). When the source operand is an XMM register, the destination operand must be a memory address. When the source operand is a memory address, the destination operand must be an XMM register.

Note that the lower half of the XMM register is unaffected by this operation.

Potential exceptions

References

*"gcc info page."
*"Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2A: Instruction Set Reference, A-M", November, 2006.

ee also

*MOVAPS/MOVAPD
*MOVDDUP
*MOVHLPS
*MOVHPS/MOVHPD
*MOVLHPS
*MOVLPS/MOVLPD
*MOVMSKPS/MOVMSKPD
*MOVNTPS
*MOVSHDUP
*MOVSLDUP
*MOVSS/MOVSD
*MOVUPS/MOVUPD

x86 instruction listings