Opcode XBTS
CPU: 80386 step A0-B0 only
Type of Instruction: User
Instruction: XBTS dest,base,bitoffset,len
Description:
Write bit string length bits from bitfield, defined by
and bitsoffset from this base to start of
the field to read. String read from this start field bit to
higher memory addresses or register bits.
And after it string placed to operand, lowest bit of
register or memory to bit 0 of .
Note: Use SHLD/SHRD instructions for extract bits strings.
On 80386 steps B1+ this opcode generation INT 6,
and on some of 486 other instruction replace this
instruction opcode.
Flags Affected: None
CPU mode: RM,PM,VM
+++++++++++++++++++++++
Physical Form: XBTS r16,r/m16,AX,CL
XBTS r32,r/m32,EAX,CL
COP (Code of Operation) : 0FH A6H Postbyte
Clocks: XBTS
80386: 6/13
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