Altera Floating-Point Manual do Utilizador descarregar pdf (Página 79)

Figure 9-3: ALTFP_EXP Signals

data[]

clk_en

clock

inst

ALTFP_EXP

result[]

underflow

zero

nan

underflow

aclr

Table 9-4: ALTFP_EXP IP Core Input Signals

Port Name Required Description

aclr No Asynchronous clear. When the aclr port is asserted high the function

is asynchronously reset.

clk_en No Clock enable. When the clk_en port is asserted high, an exponential

value operation takes place. When this signal is asserted low, no

operation occurs and the outputs remain unchanged.

clock Yes Clock input to the IP core.

data[] Yes Floating-point input data. 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 the sign bit, exponent bits, and mantissa bits.

Table 9-5: ALTFP_EXP IP Core Output Signals

Port Name Required Description

result[] Yes The floating-point exponential result of the value at data[]. The MSB

is the sign, the next MSBs are the exponent, and the LSBs are the

mantissa. The size of this port is the total width of the sign bit,

exponent bits, and mantissa bits.

overflow No Overflow exception output. Asserted when the result of the operation

(after rounding) is infinite.

underflow No Underflow exception output. Asserted when the result of the exponen‐

tial approaches 1 (from numbers of very small magnitude), or when

the result approaches 0 (from negative numbers of very large

magnitudes).

zero No Zero exception output. Asserted when the value in the result[] port

is zero.

UG-01058

2014.12.19

ALTFP_EXP Signals

9-5

ALTFP_EXP IP Core

Altera Corporation

Send Feedback

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 156 157

Comentários a estes Manuais

Sem comentários

Altera Floating-Point Manual do Utilizador Página 79

Comentários a estes Manuais

Manuais e produtos relacionados com Instrumentos de medida Altera Floating-Point