Download USER`S MANUAL ERRATA

S3C84H5X/F84H5X_UM_REV 1.10
INSTRUCTION SET
PUSHUD − Push User Stack (Decrementing)
PUSHUD
dst,src
Operation:
IR ← IR − 1
dst ← src
This instruction is used to address user-defined stacks in the register file. PUSHUD decrements
the user stack pointer and loads the contents of the source into the register addressed by the
decremented stack pointer.
Flags:
No flags are affected.
Format:
opc
Example:
dst
src
Bytes
Cycles
Opcode
(Hex)
3
8
82
Addr Mode
dst
src
IR
R
Given: Register 00H = 03H, register 01H = 05H, and register 02H = 1AH:
PUSHUD
@00H,01H
→
Register 00H = 02H, register 01H = 05H,
register 02H = 05H
If the user stack pointer (the register 00H, for example) contains the value 03H, the statement
"PUSHUD @00H,01H" decrements the user stack pointer by one, leaving the value 02H.
The 01H register value, 05H, is then loaded into the register addressed by the decremented user
stack pointer.
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