MOVQ2DQ instruction (SSE2)

Forms

Every encoding of MOVQ2DQ that Intel XED knows, one row per XED instruction form (iform). How to read the notation.

Instruction	Encoding	Requires
`MOVQ2DQ xmm, mm` MOVQ2DQ_XMMdq_MMXq	`F3 0F D6 /r`	SSE2

Data flow

Where the elements of the sources go, element 0 on the right; results that depend on a control value are drawn for an example. How to read.

The quadword in mm2 goes to the low end of xmm1, and the rest of xmm1 is zeroed.

Result quadwords 1 to 0: 0, a0.

Operation

What the forms do, in pseudocode that our tests run against results recorded on real processors. How to read.

xmm1.write(mm2.q[0])  # bits 127:64 zeroed
# bits 128 and up of the register are unchanged
# x87: TOP = 0, all tags valid

Run on AMD Zen 5 (EPYC 9645): 1 case.

Operands

What each form reads and writes, as Intel XED records it: the operands of its syntax, in order, and the implicit ones that the syntax does not name. How to read.

Operand	Kind	Action
`MOVQ2DQ xmm, mm`
`xmm`	explicit	write
`mm`	explicit	read

Flags

None: XED records no flag that the forms test or change.

Attributes

What else XED records about the forms. How to read.

All forms: may abort a TSX transaction

CPUID and processors

Each form belongs to an XED ISA set. A form can be used when the processor reports every CPUID bit of one of its ISA set's alternatives.

CPUID requirements and processors of the XED ISA sets above. Alternatives are separated by “or”; processors follow XED’s chip model, whose AMD processors end with Zen 2, and the CPU data of this site for Zen 3 to Zen 6.

ISA set	CPUID	Processors
`SSE2` SSE2	SSE2 `CPUID.01H:EDX[26]` SSE2	Every x86-64 processor in XED’s model and Zen 3 to Zen 6

More SSE2 instructions

All 124 SSE2 instructions