On Mon, 10 Jul 2023 at 12:42, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote:
>
> On Mon, 10 Jul 2023 at 11:28, Amit Hiremath via Gcc-help
> <gcc-help@xxxxxxxxxxx> wrote:
> >
> > Hi,
> >
> > Can you please point me to codes in GCC where numbers in human readable
> > format to floating point and floating point to human readable format
> > conversion are taking place? For example: 3.2444422 -->404FA4F1-->3.2444422
> >
> > int main ()
> > {
> > float a;
> >
> > a= 3.2444422;
> >
> > return 0;
> >
> > }
> > when you generate asm code, the assembler code is converted to 404FA4F1. So
> > I am looking for a code in the gcc compiler.
>
> I think you want the lex_number function in libcpp/lex.cc
Although that's just the lexer, there will be other code to convert
that to a SFmode value, which represents a single precision
floating-point number. That will cause the lexed number to be
converted to the closest representable value for the type, and then
that is just written out as a four byte binary value. I don't know
where all the code for that is.
