参数资料
型号: IPT-C2H-NIOS
厂商: Altera
文件页数: 84/138页
文件大小: 0K
描述: C2H COMPILER FOR NIOS II
标准包装: 1
系列: Nios®II
类型: Nios II
功能: C 到硬件编译器
许可证: 初始许可证
Scheduling
Figure 3–21 illustrates how the C2H Compiler schedules successive
iterations of the loop shown in Figure 3–20 . The C2H Compiler is able to
start a new iteration of the loop immediately after the prior iteration
completes State 0.
This is an example of an ideally-pipelined loop. Although the
C2H Compiler can pipeline many loops ideally, it is sometimes not
possible due to the lack of inherent parallelism in the code, as shown in
“Loop-Carried Dependencies” .
Figure 3–21. Pipelined Loop Iterations
Loop-Carried Dependencies
Loop-carried dependencies are data dependencies that manifest when
pipelining successive iterations of a loop. If the result of one calculation
in an iteration of the loop is used in a later iteration of the loop, then a
loop-carried dependency exists between the two operations.
3–44
Nios II C2H Compiler User Guide
9.1
Altera Corporation
November 2009
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