- MOVDDUP
In the x86 assembly programming language, MOVDDUP is the name for a specific action performable by modern x86 processors with 3rd-generation Streaming SIMD Extensions (SSE3). This action involves copying a number to temporary space in the processor for use in other computations.
Specifically, MOVDDUP causes one, double-precision, floating-point source to be copied to both the lower half and upper half of an XMM register.
Usage
The source operand can be either an XMM register ("xmm2") or a memory address ("m64"). When the source operand is an XMM register, the lower half of the register is used in the operation. When the source operand is a memory address, it is assumed to be the address of an 8-byte region, the value at which is used in the operation.
The destination operand must be an XMM register ("xmm1").
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
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