4
FASIN
Arc Sine
FASIN
Operation:
Arc Sine of the Source $ FPn
Assembler
FASIN.<fmt> <ea>,FPn
Syntax:
FASIN.X FPm,FPn
FASIN.X FPn
Attributes:
Format= (Byte, Word, Long, Single, Double, Extended, Packed)
Description:
Converts the source operand to extended precision (if necessary) and cal-
culates the arc sine of the number. Stores the result in the destination floating-point
data register. This function is not defined for source operands outside of the range
[-1 ... +1]; if the source is not in the correct range, a NAN is returned as the result
and the OPERR bit is set in the FPSR. If the source is in the correct range, the result
is in the range of [-~r/2... +w/2].
Operation Table:
!~
Source
Destination-~'~..~
Result
In
Range
Arc Sine
-I-
Zero
+0.0 -0.0
Infinity
+
NAN 7
NOTES:
1. Sets the OPERR bit in the FPSR exception byte.
2. If the source operand is a NAN, refer to 4.5.4 NANs for more information.
Status Register:
Condition Codes:
Quotient Byte:
Exception Byte:
Accrued Exception Byte:
Affected as described in 4.5.5.1 SETTING FLOATING-POINT
CONDITION CODES.
Not affected
BSUN
SNAN
OPERR
OVFL
UNFL
DZ
INEX2
INEX1
Cleared
Refer to 4.5.4
NANs.
Set if the source is infinity, > +1 or < -1;
cleared otherwise
Cleared
Cleared
Cleared
Refer to 6.1.7 Inexact Result.
If <fret> is Packed, refer to 6.1.8 Inexact Result
on
Decimal Input; cleared otherwise.
Affected as described in 6.1.10
IEEE Exception
and Trap
Com-
patibility
FREESCALE
4-24
MC68881/MC68882 USER'S MANUAL
To Next Page
Loading...