Altera Nios II C2H Compiler - Manual (Page 45)

Altera Corporation 9.1 3–5
November 2009 Nios II C2H Compiler User Guide
C-to-Hardware Mapping Reference
Figure 3–1 shows the hardware that results from the following statement:
int foo = a * b + x;
Figure 3–2. Pipelined Multiplication Operator
Figure 3–2 shows the hardware that results from the following statement:
int bar = a * b * c + x;
Figure 3–3. Two Stages of Pipelined Multiplication Operators
Iteration Statements
An iteration statement ( do , for , or while ), also known as a loop
statement, translates to a finite state machine in hardware. The state
machine controls execution of all the statements inside the loop block. A
loop inhibits (stalls) its parent state machine. In other words, if a loop
exists within an outer loop, the state machine for the outer loop stalls each
iteration and waits for the inner loop state machine to complete.