Microchip Technology AC164345 Data Sheet
Development Systems Ordering Guide
DS30177T-page 12
© 2005 Microchip Technology Inc.
dsPIC30F Math Library
The dsPIC30F Math Library is the compiled version of
the math library that is distributed with the highly
optimized, ANSI-compliant dsPIC30F MPLAB
the math library that is distributed with the highly
optimized, ANSI-compliant dsPIC30F MPLAB
®
C30
C Compiler (SW006012). It contains advanced single
and double-precision, floating-point arithmetic and
trigonometric functions from the standard ‘C’ header
file <math.h>. The library delivers small program code
size and data size, reduced cycles and high accuracy.
and double-precision, floating-point arithmetic and
trigonometric functions from the standard ‘C’ header
file <math.h>. The library delivers small program code
size and data size, reduced cycles and high accuracy.
Features
• The math library is callable from either MPLAB C30
or dsPIC30F Assembly language.
• The functions are IEEE-754 compliant, with signed
zero, signed infinity, NaN (Not a Number) and
denormal support and operate in the
“Round-to-Nearest” mode.
denormal support and operate in the
“Round-to-Nearest” mode.
• Compatible with MPLAB ASM30 and MPLAB
LINK30, which are available at no charge from
Microchip’s web site.
Microchip’s web site.
• Total library memory usage
(1,2)
:
- Code size: 5250 bytes
- Data size: 4 bytes
dsPIC
®
DSC Math Library Function and Performance
Function Group
Function
Performance
(Cycles)
(1,2,3,4)
Basic Floating Point
Addition
122
Subtraction
124
Multiplication
109
Division
361
Remainder
385
Trigonometric and
Hyperbolic
Hyperbolic
acos
478
asic
363
atan
696
atan2
3206
cos
3249
sin
2238
tan
2460
cosh
1049
sinh
525
tanh
338
Logarithmic and
Exponential
Exponential
exp
530
frexp
39
Idexp
44
log
2889
log10
3007
Power Functions
pow
2134
sqrt
493
Rounding Functions
ceil
94
floor
51
Absolute Value Function
fabs
6
Modular Arithmetic
Functions
Functions
modf
151
fmod
129
Note 1: Results are based on using the dsPIC30F
MPLAB
®
C30 Compiler (SW006012) version 1.20.
2: Maximum “Memory Usage” when all functions in the
library are loaded. Most applications will use less.
3: All performance statistics represented here are for
32-bit IEEE754 floating-point input and output data
types.
types.
4: Performance (in instruction cycles) listed here
represent an average number of instruction cycles
required to perform the floating-point operation.
required to perform the floating-point operation.
Ordering Information:
SW300020
dsPIC30F Math Library (Free download: www.microchip.com)
DS51443
“dsPIC30F Math Library Product Overview” (Available at: www.microchip.com)
FREE