Intel iAPX 86/88 User Manual page 42

8086/8088 CPU
Table 1-16 Instruction Set Reference Data (continued)
CLC
I
CLC (no operands)
Flags
ODITSZAPC
Clear carry flag 0
Operands
Clocks Transfers·
Bytes Coding Example
(no operands) 2(2)
-
1 CLC
CLO
I
CLD (no operands)
Flags
ODITSZAPC
Clear direction flag
0
Operands Clocks Transfers· Bytes Coding Example
(no operands) 2(2) - 1 CLD
CLI
I
Cli (no operands)
Flags
ODITSZAPC
Clear interrupt flag 0
Operands Clocks Transfers· Bytes Coding Example
(no operands) 2(2) - 1 CLI
CMC
I
CMC (no operands)
Flags
ODITSZAPC
Complement carry flag X
Operands Clocks Transfers· Bytes Coding Example
(no operands) 2(2)
-
1 CMC
CMP
I
CMP destination, source
Flags
ODITSZAPC
Compare destination to source X XXX XX
Operands Clocks
Transfers· Bytes
Coding Example
register, register
3(3)
-
2
CMP BX, CX
register, memory 9(10)+EA 1 2-4 CMP DH, ALPHA
memory, register 9(10)+EA 1 2-4 CMP [BP + 21, SI
register, immediate 4(3)+EA
-
3-4 CMP BL, 02H
memory, immediate
10(10)+EA 1
3-6 CMP [BXI.RADAR [01), 3420H
accumulator, immediate 4(3-4)
-
2-3 CMP AL; 000100008
CMPS
I
CMPS des-string, source-string
Compare string
FI
0 0 ITS ZAP C
ags X
XXXXX
Operands Clocks Transfers' Bytes Coding Example
dest-string, source-string 22(22) 2 1 CMPS BUSS1, BUFF2
(repeat) dest-string, source-string
9+22/rep 2/rep 1
REPE CMPS 10, KEY
(5 + 22/rep)
CWO
I
CWD(no operands)
Flags
00 I TSZAPC
Convert word to doubleword
Operands Clocks Transfers· Bytes Coding Example
(no operands)
5(4) . - 1 CWO
OAA
I
DAA (no operands)
Flags
ODITSZAPC
Decimal adjust for addition X XXXXX
Operands Clocks Transfers· Bytes Coding e:xample
(no operands)
4(4) .
-
1 DAA
"For the 8086 (80186) add four clocks for each 16·bit word transfer with an odd address. For the 8088 (80188) add four clocks for each 16'bit word
transfer.
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