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Altera_Forum's avatar
Altera_Forum
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21 years ago

Bug in NIOS2 GCC ?

Could this be a bug in the NIOS2-GCC ? char testsub(void) { return __builtin_ldbio (0x1000); } Generates the following Assembly code (Using -O2 and -fomit-frame-pointer): movi r3...
Altera_Forum's avatar
Altera_Forum
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21 years ago

Well, the Subroutine testfunc above at least returns the correct result, because of the shifts... BUT look at this: 

long testsub(void) {
  return __builtin_ldbio (0x1000);
}

When you compile this code, you can be sure that you get wrong results... the generated assembly code looks like this: 

movhi r3, 4096
ldhio r2, 0(r3)
ret

With this code, you can be sure you get wrong results...

Simon