MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 363
MC68EC000EI20
Manufacturer Part Number
MC68EC000EI20
Description
IC MPU 32BIT 20MHZ 68-PLCC
Manufacturer
Freescale Semiconductor
Specifications of MC68EC000EI20
Processor Type
M680x0 32-Bit
Speed
20MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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FLOG2
Operation:
Assembler
Syntax:
Attributes:
Description: Converts the source operand to extended precision (if necessary) and
Operation Table:
Floating-Point Status Register:
MOTOROLA
calculates the logarithm of that number using base two arithmetic. Stores the result in
the destination floating- point data register. This function is not defined for input values
less than zero.
Condition Codes:
Quotient Byte:
Exception Byte:
Accrued Exception Byte:
NOTES:
1. If the source operand is a NAN, refer to 1.6.5 Not-A-Numbers for more information.
2. Sets the OPERR bit in the floating-point status register exception byte.
3. Sets the DZ bit in the floating-point status register exception byte.
DESTINATION
Result
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Log
FLOG2. < fmt > < ea > ,FPn
FLOG2.X FPm,FPn
FLOG2.X FPn
Format = (Byte, Word, Long, Single, Double, Extended, Packed)
2
+
Log
of Source
2
(MC6888X, M68040FPSP)
In Range
Affected as described in 3.6.2 Conditional Testing.
Not affected.
BSUN
SNAN
OPERR
OVFL
UNFL
DZ
INEX2
INEX1
bility in the appropriate user’s manual.
Affected as described in IEEE exception and trap compati-
FPn
NAN
Log
– +
2
Cleared
Refer to 1.6.5 Not-A-Numbers.
Set if the source is < 0; cleared otherwise
Cleared
Cleared
Set if the source is
Refer to inexact result in the appropriate
user’s manual.
If < fmt > is packed, refer to inexact result on
decimal input in the appropriate user’s
manual; cleared otherwise.
2
SOURCE
– inf
Zero
3
1
– +
+ inf
Floating Point Instructions
0; cleared otherwise
Infinity
FLOG2
NAN
–
2
5-61
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