参数资料
型号: IPT-C2H-NIOS
厂商: Altera
文件页数: 52/138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
One-to-One C-to-Hardware Mapping
Table 3–5 shows an example of a subfunction called by two different
functions. In this case, functions foo() and bar() both call a
subfunction foobar_sub() .
Table 3–5. Shared Subfunction foobar_sub()
Top-Level Accelerated Function: foo() Top-Level Accelerated Function: bar()
void foo(int *data_in,
int *data_out)
{
...
foobar_sub();
...
}
void bar(int *data_in,
int *data_out)
{
...
foobar_sub();
...
foobar_sub();
...
}
Figure 3–8 shows the hardware structure of the accelerators resulting
from the code in Table 3–5 . Logic for the function foobar_sub() exists
within both accelerators.
Figure 3–8. Shared Subfunction Logic
The C2H Compiler does not support external subfunctions. You must
locate the subfunction in the same source file as the accelerated function.
This is because, unlike the #include construct, a C external function
reference requires the presence of a linker. The C2H Compiler has no
linker.
3–12
Nios II C2H Compiler User Guide
9.1
Altera Corporation
November 2009
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