you might want to disable that exception in main() setfcr(getcfr() ~FPOVFL);
sometimes I had to go extreme and do: setfcr(getfcr() &~ (FPINEX|FPOVFL|FPUNFL|FPZDIV|FPINVAL)); when porting some code that was supposed to run well on unixes. see getfcr(2). On Nov 22, 2013, at 2:42 PM, Fausto Saporito <[email protected]> wrote: > Hi Erik, > > yes, it's a FP stack overflow... :-) > I also tried with 9front, and the error message is slightly different: > > ./arithchk > #define IEEE_8087 > #define Arith_Kind_ASL 1 > arithchk 8523: suicide: sys: fp: invalid operation fppc=0x12ee status=0xb8b3 > pc=0x000012f2 > > further checks reveal that the problem is this function: > > void > get_nanbits(unsigned int *b, int k) > { > union { double d; unsigned int z[2]; } u, u1, u2; > > k = 2 - k; > u1.z[k] = u2.z[k] = 0x7ff00000; > u1.z[1-k] = u2.z[1-k] = 0; > u.d = u1.d - u2.d; /* Infinity - Infinity */ <<<<<<<====== this > is the FATAL ERROR. > b[0] = u.z[0]; > b[1] = u.z[1]; > } > > called as getnanbits(nanbits,1) > > I'm sorry but I don't know how to generate the acid code. > > regards, > Fausto > > > > 2013/11/22 erik quanstrom <[email protected]> > > By the way I have always the same problem (suicide with stack overflow > > running arithchk). > > that's not a stack overflow, that's a x87 floating point stack overflow. > if you would post the code around the program counter in your error > message it would be helpful. asm(*PC) with acid would be even better. > > - erik > — Federico G. Benavento [email protected]
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