Intel iAPX 86/88 User Manual page 56

8086/8088 CPU
Table 1-16 Instruction Set Reference Data (continued)
STOS
I
STOS dest-string
Store byte or word string
FI 0 D ITS ZAP C
ags
Operands Clocks Transfers· Bytes Coding Example
dest-string 11 (1 0) 1 1 STOS PRINT_LINE
(repeat) dest-string 9+ 10/rep) 1/rep 1
REP STOS DISPLAY
(6 + 9/rep)
SUB
I
SUB destination, source
Subtraction
FIODITSZAPC
ags
x
XXX XX
Operands· Clocks
Transfers·
Bytes
Coding Example
register, register 3(3)
-
2 SUBCX, BX
register, memory 9(10)+EA 1 2-4 SUB DX, MATH_TOTAL [S1)
memory, register 16(10)+EA 2 2-4 SUB [BP+2), CL
accumulator, immediate 4(3-4)
-
2-3 SUBAL,10
register, immediate 4(4)
-
3-4 SUB SI, 5280
memory, immediate 17(16)+EA 2 3-6 SUB [BP), BALANCE, 1000
TEST
I
TEST destination, source
Test or non-destructive logical and
FIODITSZAPC
ags
o
XXUXO
Operands
Clocks Transfers· Bytes Coding Example
register, register 3(3)
-
2 TESTSI,DI
register, memory 9(10)+EA 1 2-4 TEST SI, END_COUNT
accumulator, immediate 4(3-4)
-
2-3
TEST AL, 001000008
register, immediate 5(4)
-
3·4 TEST BX, OCC4H
memory, immediate 11(10)+EA
-
3·6
TEST RETURN_COUNT, 01 H
WAIT
I
WAIT (no operands)
Flags
ODITSZAPC
Wait while TEST pin not asserted
Operands Clocks
Transfers· Bytes Coding Example
(no operands) 4+5(6)n
-
1 WAIT
XCHG
I
XCHG destination, source
Flags
ODITSZAPC
Exchange
Operands Clocks
Transfers·
Bytes
Coding Example
accumulator, reg 16 3(3)
-
1 XCHGAX, BX
memory, register 17(17)+EA 2 2·4
XCHG SEMAPHORE, AX
register, register 4(4)
-
2 XCHGAL, BL
XLAT
I
XLAT source-table
Translate
Flags
0
D ITS ZAP C
Operands Clocks Transfers· Bytes Coding Example
source-table 11 (11) 1 1 XLAT ASCII_TAB
'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. .
1·40
210912-001