From:	buers AT gmx DOT de (Dieter Buerssner)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Q: operand size - FPU instructios
Date:	24 Mar 2000 21:29:56 GMT
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References:	<38DA73F1 DOT FB5C375B AT mtu-net DOT ru> <200003241737 DOT WAA00845 AT midpec DOT com> <38DBC680 DOT 3B37E90F AT mtu-net DOT ru>
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To:	djgpp AT delorie DOT com
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Alexei A. Frounze wrote:

>But appending these suffixes to FPU instructions, I get error messages
>like "invalid instruction" or something like that. I.e. AS doesn't
>recognize FILDW (for 16-bit integer), FLDQ (floating point double), FLDT
>(floating point extended - FPU internal 10-byte format).

From the manual of as (info as):

   * Floating point constructors are `.float' or `.single', `.double',
     and `.tfloat' for 32-, 64-, and 80-bit formats.  These correspond
     to instruction mnemonic suffixes `s', `l', and `t'. `t' stands for
     80-bit (ten byte) real. [...]
         
So to load float double and long double, use flds, fldl and fldt.
To load a 16, 32 and 64 bit signed interger use fild, fildl and fildq.

There is also some info about inline assembly and floating point
registers in the Gcc manual (info gcc).

-- Regards, Dieter

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