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Altera_Forum
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13 years ago

A big bug?

Hi, Here is a simple program:# include <stdio.h># include <io.h># include "sys/alt_stdio.h"# include "alt_types.h"# include "system.h" alt_u8 SND[1100]; int main() { int i; ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

The problem is about understanding the requirements of the processor architecture. NIOS II reference handbook tells:

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A data address is considered misaligned if the byte address is not a multiple of the width of the load or store instruction data width (four bytes for word, two bytes for half-word). Byte load and store instructions are always aligned so never take a misaligned address exception.

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The same is valid for most modern processors. x86 is an exception somehow.