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dsPIC30F
12.1
Math Library
TABLE 12-2:
MEMORY USAGE AND
The dsPIC30F Math Library is the compiled version of
the math library that is distributed with the highly
PERFORMANCE
Memory Usage (bytes) (1)(2)
optimized, ANSI-compliant dsPIC30F MPLAB ? C30
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.
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 operated in the “round
to nearest” mode.
? Compatible with MPLAB ASM30 and MPLAB
LINK30, which are available at no charge from
Microchip’s web site.
Table 12-2 shows the memory usage and performance
of the Math Library. Table 12-3 lists the math functions
Code size
Data size
add
sub
mul
div
Rem
Sqrt
Note 1:
2:
3:
5250
4
Performance (cycles) (1)(3)
122
124
109
361
385
492
Results are based on using dsPIC30F
MPLAB C30 Compiler (SW006012)
version 1.20.
Maximum “Memory Usage” when all
functions in the library are loaded. Most
applications will use less.
Average 32-bit floating-point perfor-
that are included.
TABLE 12-3:
mance results.
MATH FUNCTIONS
Single and Double-Precision Floating-Point Functions
Arithmetic functions
Root and Power Functions
Trigonometric and Hyperbolic Functions
Logarithmic and Exponential Functions
Rounding Functions
Absolute Value Functions
Modular Arithmetic Functions
Comparison and Conversions
DS70043F-page 50
Add, subtract, multiply, divide, remainder
pow, sqrt
acos, asin, atan, atan2, cos, cosh, sin, sinh, tan, tanh
exp, log, log10, frexp, ldexp
ceil, floor
fabs
fmod, modf
Comparison, integer and floating-point conversions
? 2005 Microchip Technology Inc.
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