Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Instrukcja Użytkownika Pobierz pdf (Strona 145)

7 DETAILS OF INSTRUCTIONS

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

137

pop %rd

Function

Pop

Standard) rd

← W[sp], sp ← sp + 4

Extension 1) Unusable

Extension 2) Unusable

Code

15 12 11 8 7 4 3 0

0 0 0 0 0 0 0 0 0 1 0 1

r d

0x005_

Flag

IE C V Z N

– – – – –

Mode

CLK

One cycle

Description

The data of a general-purpose register that has been saved to the stack by a push instruction is

restored from the stack. The pop instruction restores word data from the stack with an address

indicated by the current SP to the rd register, and increments the SP by an amount equivalent to 1

word (4 bytes).

Stack operation when pop %rd is executed

31 0

rd ← Data

31 0

Data

Example

pop %r3 ; r3 ← W[sp], sp ← sp + 4

1 2 ... 140 141 142 143 144 145 146 147 148 149 150 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Instrukcja Użytkownika Strona 145