Analog Devices VISUALDSP++ 3.5 Manual page 15

Calling C/C++ Functions from Assembly Programs .............. 1-172
Using Mixed C/C++ and Assembly Naming Conventions ..... 1-174
C++ Programming Examples ................................................ 1-176
Using Fract Type Support ................................................ 1-176
Using Complex Number Support .................................... 1-177
ACHIEVING OPTIMAL PERFORMANCE FROM C/C++
SOURCE CODE
General Guidelines ....................................................................... 2-3
How the Compiler Can Help ................................................... 2-4
Using the Compiler Optimizer ............................................ 2-4
Using the Statistical Profiler ............................................... 2-5
Using Interprocedural Optimization .................................... 2-6
Data Types .............................................................................. 2-7
Avoiding Emulated Arithmetic ............................................ 2-8
Getting the Most from IPA ...................................................... 2-9
Initializing Constants Statically ........................................... 2-9
Avoiding Aliases ................................................................ 2-10
Indexed Arrays vs. Pointers .................................................... 2-12
Trying Pointer and Indexed Styles ...................................... 2-12
Function Inlining .................................................................. 2-13
Using Inline asm Statements .................................................. 2-14
Memory Usage ...................................................................... 2-15
Loop Guidelines ......................................................................... 2-17
Keeping Loops Short ............................................................. 2-17
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
for ADSP-219x DSPs
CONTENTS
xv