Re: [Tinycc-devel] float value triggers error

[Steven G. Messervey]

>----- Original Message -----
>From: Daniel Glöckner <address@hidden>
>To: address@hidden
>Cc: 
>Sent: Sunday, November 3, 2013 5:29 PM
>Subject: Re: [Tinycc-devel] float value triggers error

>On Sun, Nov 03, 2013 at 12:09:32PM -0800, Steven G. Messervey wrote:

>> mob-branch, configured with "--with-libgcc" only, debian squeeze 32-bit:
>> tcc: error: undefined symbol '__tcc_fpinit'
>> tcc: error: undefined symbol '__tcc_cvt_ftol'

>--with-libgcc uses libgcc instead of libtcc1.
>This will of course fail for tcc specific functions.

>__tcc_cvt_ftol does the same as libgcc's __fix{s,d,x}fdi
>and there are already tokens defined for those functions
>for use on ARM. The only difference is that __tcc_cvt_ftol
>passes the floating point value in a register and therefore
>does not have to distinguish between float, double, and
>long double.

>__tcc_fpinit is probably redundant on Linux as GLIBC
>already calls __setfpucw right before calling main.

>  Daniel

#idef 'ing out the call to _tcc_fpinit works.

I tried (blindly) substituting __fixsfdi for __tcc_cvt_ftol in an #ifdef in 
tcctok.h ;
the result of the following program produces ridiculous results:

int y = (int)(25.0 * ((double)rand() / (double)RAND_MAX));
printf("y = %d\n",y);

On my test machine, this gives 1610612736, well above 25.

I'd like to push a patch for this issue, but I am still
unsure as to how to fix the problem.

Thanks,
  Steve