llvm dev - Jan 2020 - X86_FP80 in APFloat

Hi all,

I want to extract the actual value of an X86_FP80 APFloat Constant. Is
there any API with which I can get the value of mantissa and exponent?

I tried ConvertToHexString, but for x86_fp80 0xK8FFFC000000000000000, it
just returns nan, instead I want the actual byte information.

There are APIs like convertToDouble and convertToFloat for APFloat single
and double precision, I am looking for something similar for extended
precision(X86_FP80).

Thanks,
Akash
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Hi Akash,

I guess your best option is to use APFloat::bitcastToAPInt(), which returns
the integer representation of the underlying bits.

Cheers,
Ehud.

On Wed, Jan 22, 2020 at 6:56 AM Akash Banerjee via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi all,
>
> I want to extract the actual value of an X86_FP80 APFloat Constant. Is
> there any API with which I can get the value of mantissa and exponent?
>
> I tried ConvertToHexString, but for x86_fp80 0xK8FFFC000000000000000, it
> just returns nan, instead I want the actual byte information.
>
> There are APIs like convertToDouble and convertToFloat for APFloat single
> and double precision, I am looking for something similar for extended
> precision(X86_FP80).
>
> Thanks,
> Akash
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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