DFPMU
Floating Point Coprocessor
ver 2.05
OVERVIEW
DFPMU is a Floating Point Coprocessor, de-
signed to assist CPU in performing the float-
ing point mathematic computations. DFPMU
directly replaces C software functions, by
equivalent, very fast hardware operations,
which significantly accelerate system per-
formance. It doesn’t require any program-
ming, so it also doesn’t require any modifica-
tions made in the main software. Everything
is done automatically during software compi-
lation by the DFPMU C driver.
DFPMU was designed to operate with DCD’s
DP8051, but can also operate with any other
8-, 16- and 32-bit processor. Drivers for all
popular 8051 C compilers are delivered to-
gether with the DFPMU package.
DFPMU uses the specialized CORDIC and
standard algorithms to compute math func-
tions. It supports
addition, subtraction, mul-
tiplication, division, square root,
compari-
son, absolute value, change sign of a number
and trigonometric functions:
sine, cosine,
tangent
and
arctangent.
It has built-in con-
version instructions from integer type to float-
ing point type and vice versa. The input num-
bers format is according to IEEE-754 stan-
dard. DFPMU supports single precision real
numbers, 16-bit and 32-bit integers.
Each
floating point function can be turned
on/off
at configuration level providing the
flexible scalability of DFPMU module. It al-
lows save silicon space and provides exact
configuration required by certain application.
All trademarks mentioned in this document
are trademarks of their respective owners.
DFPMU is a technology independent design
that can be implemented in a variety of proc-
ess technologies.
APPLICATIONS
●
Math coprocessors
●
DSP algorithms
●
Embedded arithmetic coprocessor
●
Fast data processing & control
KEY FEATURES
●
Direct replacement
for C float software
functions such as: +, -, *, /,==, !=,>=, <=, <,
>
●
Configurability of all available functions
●
C interface supplied for all popular compil-
ers: GNU C/C++, 8051 compilers
●
No programming required
●
IEEE-754 Single precision real format
support –
float type
●
16-bit word and 32-bit short integers for-
mat supported –
integer types
●
Flexible arguments and result registers
location
●
Performs the following functions:
○
FADD, FSUB
○
FMUL, FDIV
○
FSQRT
○
FCHS, FABS
– addition, subtraction
– multiplication, division
– square root
– change of sign, absolute
value
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