Pushui Push User Stack (Incrementing) - Samsung S3C80A5B User Manual

INSTRUCTION SET
PUSHUI
— Push User Stack (Incrementing)
PUSHUI dst,src
IR ← IR + 1
Operation:
dst ← src
This instruction is used for user-defined stacks in the register file. PUSHUI increments the user
stack pointer and then loads the contents of the source into the register location addressed by the
incremented user stack pointer.
Flags: No flags are affected.
Format:
opc
Example: Given: Register 00H = 03H, register 01H = 05H, and register 04H = 2AH:
PUSHUI
If the user stack pointer (register 00H, for example) contains the value 03H, the statement
"PUSHUI @00H,01H" increments the user stack pointer by one, leaving the value 04H. The 01H
register value, 05H, is then loaded into the location addressed by the incremented user stack
pointer.
6-68
dst src
→
@00H,01H Register 00H = 04H, register 01H = 05H, register 04H = 05H
Bytes Cycles Opcode
3 8
S3C80A5B
Addr Mode
(Hex) dst src
83 IR R