모두의 코드
MOVDQ2Q (Intel x86/64 assembly instruction)
MOVDQ2Q
Move Quadword from XMM to MMX Technology Register### Instruction Operand Encoding
Op/En Operand 1 Operand 2 Operand 3 Operand 4
RM ModRM:reg (w) ModRM:r/m (r) NA NA
Description
Moves the low quadword from the source operand (second operand) to the destination operand (first operand). The source operand is an XMM register and the destination operand is an MMX technology register.
This instruction causes a transition from x87 FPU to MMX technology operation (that is, the x87 FPU top-of-stack pointer is set to 0 and the x87 FPU tag word is set to all 0s [valid]). If this instruction is executed while an x87 FPU floating-point exception is pending, the exception is handled before the MOVDQ2Q instruction is executed.
In 64-bit mode, use of the REX.R prefix permits this instruction to access additional registers (XMM8-XMM15).
Operation
DEST <- SRC[63:0];
Intel C/C++ Compiler Intrinsic Equivalent
MOVDQ2Q : __m64 _mm_movepi64_pi64(__m128i a)
SIMD Floating-Point Exceptions
None.
Protected Mode Exceptions
#NM
If CR0.TS[bit 3] = 1.
#UD
If CR0.EM[bit 2] = 1.
If CR4.OSFXSR[bit 9] = 0.
If CPUID.01H:EDX.SSE2[bit 26] = 0.
If the LOCK prefix is used.
#MF
If there is a pending x87 FPU exception.
Real-Address Mode Exceptions
Same exceptions as in protected mode.
Virtual-8086 Mode Exceptions
Same exceptions as in protected mode.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
Same exceptions as in protected mode.
댓글을 불러오는 중입니다..