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Re: Need help on FPU division/Multiplication

From: Halesh S <halesh dot s at gmail dot com>
To: tprince at computer dot org
Cc: gcc-help at gcc dot gnu dot org
Date: Wed, 11 Feb 2009 10:02:00 +0530
Subject: Re: Need help on FPU division/Multiplication
References: <6276693d0902090422qaec0b05oc9672e2fc915dbbb@mail.gmail.com> <6276693d0902090423k47ad6238md3a3b193d7c7ae4b@mail.gmail.com> <49902CAA.9020407@sbcglobal.net>

Thanks Tim.

You are correct, using fstp instruction instead of fst will resolve
this problem.


On Mon, Feb 9, 2009 at 6:46 PM, Tim Prince <TimothyPrince@sbcglobal.net> wrote:
> Halesh S wrote:
>
>> I wrote a small code to perform FPU division and multiplication. & I
>> have attached the same.
>>
>> The output is as follows
>>
>> $./test
>> 1.000000
>> 81.000000
>> 1.000000
>> nan
>>
>> Why the last o/p is giving NAN? Please let me the answer, why its
>> failing to return the proper product.
>> If any problem in my code please let me know.
>
> Aren't you overflowing the x87 internal stack, by always pushing data and
> never popping?
>
>

References:
- Need help on FPU division/Multiplication
  - From: Halesh S
- Re: Need help on FPU division/Multiplication
  - From: Tim Prince

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