PCWHD IDE COMPILER Custom Computer Services Inc (CCS), PCWHD IDE COMPILER Datasheet - Page 351

• Manufacturer Part Number: PCWHD IDE COMPILER
• Description: PCWHD PIC10,16,18,24, DSPIC
• Manufacturer: Custom Computer Services Inc (CCS)
• Type: Compilerr

Specifications of PCWHD IDE COMPILER

• For Use With/related Products: Microchip PIC10, PIC12, PIC16, PIC18, PIC24, dsPIC MCUs
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 429-1009

How much time do math operations take?
Unsigned 8 bit operations are quite fast and floating point is very slow. If possible consider fixed
point instead of floating point. For example instead of "float cost_in_dollars;" do "long
cost_in_cents;". For trig formulas consider a lookup table instead of real time calculations (see
EX_SINE.C for an example). The following are some rough times on a 20 mhz, 24-bit PIC®. Note
times will vary depending on memory banks used.
80mhz dsPIC33FJ (40MIPS)
+
-
*
/
exp()
ln()
sin()
int8
[us]
0.075
0.125
0.175
0.650
*
*
*
int16
[us]
0.75
0.125
0.100
0.550
*
*
*
int32
[us]
0.175
0.200
1.150
13.500
*
*
*
int48
[us]
0.275
0.350
1.850
25.550
*
*
*
int64
[us]
0.375
0.400
1.975
68.225
*
*
*
float32
[us]
3.450
3.375
2.450
12.475
70.675
94.475
77.875
float48
[us]
3.825
3.725
2.950
22.575
158.55
157.400
136.925
float 64
[us]
5.025
5.225
4.525
33.80
206.125
201.825
184.225
337