Altera Floating-Point User Manual
Page 68
Port Name
Required
Description
aclr
No
Synchronous clear. Source is asynchronously reset when asserted
high.
dataa[]
Yes
Floating-point input data input to the multiplier. The MSB is the sign,
the next MSBs are the exponent, and the LSBs are the mantissa. This
input port size is the total width of sign bit, exponent bits, and
mantissa bits.
datab[]
Yes
Floating-point input data to the multiplier. The MSB is the sign, the
next MSBs are the exponent, and the LSBs are the mantissa. This
input port size is the total width of sign bit, exponent bits, and
mantissa bits.
Table 7-7: ALTFP_MULT IP Core Output Signals
Port Name
Required
Description
result[]
Yes
Output port for the multiplier. The floating-point result after
rounding. The MSB is the sign, the next MSBs are the exponent, and
the LSBs are the mantissa.
overflow
No
Overflow port for the multiplier. Asserted when the result of the
multiplication, after rounding, exceeds or reaches infinity. Infinity is
defined as a number in which the exponent exceeds
2
WIDTH_EXP
-1
.
underflow
No
Underflow port for the multiplier. Asserted when the result of the
multiplication (after rounding) is
0
while none of the inputs to the
multiplication is
0
, or asserted when the result is a denormalized
number.
zero
No
Zero port for the multiplier. Asserted when the value of
result[]
is
0
.
nan
No
NaN port for the multiplier. This port is asserted when an invalid
multiplication occurs, such as the multiplication of infinity and zero.
In this case, a NaN value is the output generated at the
result[]
port. The multiplication of any value and NaN produces NaN.
7-6
ALTFP_MULT Signals
UG-01058
2014.12.19
Altera Corporation
ALTFP_MULT IP Core