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MOVHPD
In the x86 assembly language, x86 assembly programming language, MOVHPD is the name for a specific action performable by modern x86, x86 processors with SSE2, 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 *'' {{mono, info page.'' *''Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2A: Instruction Set Refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MOVDDUP
In the x86 assembly language, x86 assembly programming language, MOVDDUP is the name for a specific action performable by modern x86, x86 processors with SSE3, 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, double-precision, floating point, floating-point source to be copied to both the lower half and upper half of an Streaming SIMD Extensions, 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 *{{mono, gcc info documentation. *''Int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |