MC68EC000EI16 Freescale Semiconductor, MC68EC000EI16 Datasheet - Page 417

• Manufacturer Part Number: MC68EC000EI16
• Description: IC MPU 32BIT 16MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI16

• Processor Type: M680x0 32-Bit
• Speed: 16MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

FSGLMUL
Operation:
Assembler
Syntax:
Attributes:
Description: Converts the source operand to extended precision (if necessary) and
Operation Table:
MOTOROLA
multiplies that number by the number in the destination floating-point data register.
Stores the result in the destination floating-point data register, rounded to single
precision (regardless of the current rounding precision).
Both the source and destination operands are assumed to be representable in the sin-
gle-precision format. If either operand requires more than 24 bits of mantissa to be
accurately represented, the extraneous mantissa bits are truncated prior to the multi-
pliction; hence, the accuracy of the result is not guaranteed. Furthermore, the result
exponent may exceed the range of single precision, regardless of the rounding preci-
sion selected in the floating-point control register mode control byte. Refer to 3.6.1
Underflow, Round, Overflow for more information.
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.
DESTINATION
In Range
Infinity
Zero
The input operand mantissas truncate to single precision before
the multiply operation. The result mantissa rounds to single pre-
cision despite the rounding precision selected in the floating-
point control register.
M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL
Source x FPn
FSGLMUL. < fmt > < ea > ,FPn
FSGLMUL.X FPm,FPn
Format = (Byte, Word, Long, Single, Double, Extended, Packed)
+
–
+
–
+
–
+
+ 0.0
– 0.0
+ inf
– inf
(Single Precision)
Single-Precision Multiply
In Range
Multiply
(MC6888X, MC68040)
FPn
– 0.0
+ 0.0
+ inf
– inf
NOTE
– +
+ 0.0
– 0.0
+ 0.0
– 0.0
SOURCE
NAN
Zero
1
– 0.0
+ 0.0
– 0.0
+ 0.0
– +
+ inf
– inf
+ inf
– inf
Floating Point Instructions
FSGLMUL
Infinity
NAN
2
– inf
+ inf
– inf
+ inf
–
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