Opcode MOVD
CPU: all which supported IA MMX:
Pentium (P55C only), Pentium (tm) Pro (P6) future models
Type of Instruction: User
Instruction: MOVD dest,src
Description:
IF dest is MMi register THEN
{
dest[63..32] <- 0
dest[31..0] <- src
} ELSE ; If dest is DWORD
dest <- src [31..0]
Note: This instruction moved DWORDs to/from MMX registers
Flags affected: None
Exceptions:
RM PM VM SMM Description
#GP(0) If result in Non-Writable segment
#GP(0) If Illegal memory operand's EA in CS,DS,ES,FS,GS
#SS(0) If illegal memory operand's EA in SS
#PF(fcode) If page fault
#AC #AC If unaligned memory reference then alignment
check enabled and in ring 3.
#UD #UD #UD #UD If CR0.EM = 1
#NM #NM #NM #NM If CR0.TS = 1
#MF #MF #MF #MF If pending FPU Exception
++++++++++++++++++++++++++++++++++++++
COP & Times:
MOVD mm,r/m32 0FH 6EH PostByte
MOVD r/m32,mm 0Fh 7Eh PostByte
mm,r/m32 r/m32,mm
P55C: n/a (~1) (~1)
future P6: n/a (~1) (~1)
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