4
INSTRUCTION NAME
-FABS
OPERATION DESCRIPTION (SEE 4,6 INDIVIDUAL INSTRUCTION DE-
SCRIPTIONS
FOR NOTATION DEFINITIONS).
SYNTAX FOR THIS INSTRUCTION
Iz
TEXT DESCRIPTION OF INSTRUCTION OPERATION
%
RESULT OF OPERATION FOR INPUT OPERAND(S). (THIS TABLE DEFINES I /
THE DATA TYPE OF THE RESULT THAT IS RETURNED FOR EACH COM-
)
BINATION OF INPUT OPERANDS.)
STATUS REGISTER EFFECTS
INSTRUCTION FORMAT (THIS SPECIFIES THE BIT PATTERN AND FIELDS
OF THE OPEBAT;DN AND COMMAND WORDS, AND ANY OTHER WORDS I|
THAT ARE ALWAYS PART OF THE INSTRUCTION. THE EFFECTIVE ADDRESS
EXTENSIONS ARE NOT EXPLICITILY ILLUSTRATED. THE EXTENSION WORDS
(IF ANY) FOLLOW IMMEDIATELY AFTER THE ILLUSTRATED PDRTIDNS OF
THE INSTRUCTIONS. REFER TO THE USER'S MANUAL OF THE MC68020
OR MC68030 FOR THE FORMAT OF ANY REQUIRED EXTENSION WORDS.)
I
MEANINGS AND ALLOWED VALUES (FOR THE VARIOUS FIELDS REQUIRED ( __
BY THE INSTRUCTION (FORMAT).
Operation: Absolute Value of Sou
Assembler
FABS.<fmt> <ea
Syntax: FABS.X FPrr
FABS.X FPn
Attributes:
Format = (Byte, Word,
Description: Converts the source o
absolute value of that number in
~.~ Operation Table:
I~
sou~cel ,.~
Destination ~ *
Resu]'t I ~bsc
NOTE: If the source eperan--, is e
Status Register:
Condition Codes:
Quotient Byte:
Exception Byte:
Affected
DITION c
Not affe
BSUN
SNAN
OPERR
OVFL
UNFL
DZ
INEX2
INEX1
Accrued Exception Byte:
"~ Instruction
Format:
I I 1
0
B.'M
0
Affected
bility.
I COPR~CESSO
1 (0
SOURCE
I
SPECIFIER
Figure 4-1. Instruction Description Format
FREESCALE
4-14
MC68881/MC68882 USER'S MANUAL
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