Altera Nios II C2H Compiler Manual do Utilizador descarregar pdf (Página 90)

3–50 9.1 Altera Corporation

Nios II C2H Compiler User Guide November 2009

Scheduling

Example 3–38. Pipelined Subfunction

int MAX(int a, int b)

{

return ((a > b)? a : b);

}

#pragma altera_accelerate connect_variable MAX_loop/a to sdram

#pragma altera_accelerate connect_variable MAX_loop/b to

onchip_ram_64_kbytes

int MAX_loop(int * __restrict__ a, int * __restrict__ b)

{

int i, c = 0;

for (i = 0; i < 1024; i++)

{

c += MAX(a[i], b[i]);

}

return c;

}

If the subfunction performs a memory access that stalls, then the outer

state machine also stalls.

Pipelined subfunctions provide a useful option for controlling shared

resources. For further information, see “Resource Sharing”.

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 137 138

Sem comentários

Altera Nios II C2H Compiler Manual do Utilizador Página 90