Compaq ECQD2KCTE Laptop User Manual


 
Instruction Descriptions 4–55
4.6.3 Byte Insert
Format:
Operation:
CASE
big_endian_data: Rbv’ Rbv XOR 111
2
little_endian_data: Rbv’ Rbv
ENDCASE
CASE
INSBL: byte_mask 0000 0000 0000 0001
2
INSWx: byte_mask 0000 0000 0000 0011
2
INSLx: byte_mask 0000 0000 0000 1111
2
INSQx: byte_mask 0000 0000 1111 1111
2
ENDCASE
byte_mask LEFT_SHIFT(byte_mask, Rbv’<2:0>)
CASE
INSxL:
byte_loc Rbv’<2:0>*8
temp LEFT_SHIFT(Rav, byte_loc<5:0>)
Rc BYTE_ZAP(temp, NOT(byte_mask<7:0>))
INSxH:
byte_loc 64 - Rbv’<2:0>*8
temp RIGHT_SHIFT(Rav, byte_loc<5:0>)
Rc BYTE_ZAP(temp, NOT(byte_mask<15:8>))
ENDCASE
Exceptions:
Instruction mnemonics:
INSxx Ra.rq,Rb.rq,Rc.wq
!Operate format
INSxx Ra.rq,#b.ib,Rc.wq
!Operate format
None
INSBL Insert Byte Low
INSWL Insert Word Low
INSLL Insert Longword Low
INSQL Insert Quadword Low
INSWH Insert Word High
INSLH Insert Longword High
INSQH Insert Quadword High