Ldw — Load Word - Samsung S3F84B8 User Manual

S3F84B8_UM_REV 1.00
6.3.44 LDW — LOAD WORD
dst,src
LDW
dst  src
Operation:
The contents of source (word) are loaded into the destination. The contents of source remain
unaffected.
No flags are affected.
Flags:
Format:
opc
opc
Given R4 = 06H, R5 = 1CH, R6 = 05H, R7 = 02H, register 00H = 1AH,
Examples:
register 01H = 02H, register 02H = 03H, and register 03H = 0FH:
LDW
LDW
LDW
LDW
LDW
LDW
In the second example, note that the statement "LDW 00H,02H" loads the contents of source
word 02H, 03H into the destination word 00H, 01H. This leaves the value 03H in general register
00H and the value 0FH in register 01H.
Other examples show how to use the LDW instruction with various addressing modes and
formats.
src dst
dst

RR6,RR4

00H,02H

RR2,@R7

04H,@01H

RR6,#1234H

02H,#0FEDH
Bytes
3
src 4
R6 = 06H, R7 = 1CH, R4 = 06H, R5 = 1CH
Register 00H = 03H, register 01H = 0FH,
register 02H = 03H, register 03H = 0FH
R2 = 03H, R3 = 0FH,
Register 04H = 03H, register 05H = 0FH
R6 = 12H, R7 = 34H
Register 02H = 0FH, register 03H = 0EDH
6-57
6 INSTRUCTION SET
Cycles Opcode
(Hex)
8 C4
8 C5
8 C6
Addr Mode
dst src
RR RR
RR IR
RR IML