Zilog Z8F0130 - Manual (Page 242)

eZ8
™
CPU Core
User Manual
UM012820-0810 SRL Instruction
227
Attributes
Escaped Mode Addressing
Using Escaped Mode Addressing, address modes R or IR specify a work-
ing register. If the destination address is prefixed by
Eh ( 1110b ), a work-
ing register is inferred. For example, if Working Register R12 ( Ch ) is the
preferred destination operand, use ECh as the destination operand in the
Op Code. To access registers with addresses E0h to EFh , either set the
Working Group Pointer, RP[7:4] , to Eh or use indirect addressing.
Sample Usage
If Working Register R6 contains the value B1h ( 10110001b ), the follow-
ing statement leaves the value 58h ( 01011000b ) in Working Register R6,
sets the Carry flag, and clears the Z, V, and S flags:
SRL R6

Object Code: 1F C0 E6
If Register C6h contains the value DFh , and Register DFh contains the
value F8h ( 11111000b ), the following statement leaves the value 7Ch
( 01111100b ) in Register DFh and resets the C, Z, S, and V flags:
SRL @C6h

Object Code: 1F C1 C6
Mnemonic Destination
Op
Code
(Hex)
Operand 1 Operand 2 Operand 3
SRL R1 1F C0 R1 — —
SRL @R1 1F C1 R1 — —