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Altera_Forum's avatar
Altera_Forum
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21 years ago

Can I accelerate?

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/wink.gif hello,everyone! My NiosII&#39;s C code is: int main() { unsigned count; while(1) { count=IORD_ALTER...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

One point of interest - in the code which is generated: 

.L2:
ldwio r2, 0(r3)
stwio r2, 0(r3)
br .L2

the processor will stall for two cycles after the ldwio because it can&#39;t use the value read from memory until two cycles later. It can use other registers though so the compiler will usually be able to insert other instructions here to keep the CPU busy.