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Index > Linux > Difference between GAS and FASM?

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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
Tell me or show me the link ;)

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Post 26 Jul 2004, 09:48
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
GAS is designed as a backend for GCC. It uses AT&T style mnemonics, and is generally harder to program for than FASM.
Post 26 Jul 2004, 10:07
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
gas2fasm.pl(or !$.sh) or binutils with FASM(of course, without GAS).

so don't let FASM obsolete, ATM.

Edit: oh, also i want to know which is faster.
Post 26 Jul 2004, 10:39
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crc



Joined: 21 Jun 2003
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Location: Penndel, PA [USA]
crc
Quote:
binutils with FASM


We're not likely to see BINUTILS using FASM. The whole idea of binutils (and the other parts of GCC) are to provide a multi-cpu toolchain. FASM is limited to x86. And it's not GPL, so the FSF wouldn't like it anyway!
Post 26 Jul 2004, 10:56
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
then any other way to use with gcc and libc? ^.^?

--
about GPL: i see no problem with FASM as long as it's license >= GPL.


Last edited by fasm9 on 26 Jul 2004, 13:08; edited 1 time in total
Post 26 Jul 2004, 12:51
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
You can write code that can be linked with LIBC and GCC; a GCC backend that generates FASM code is not likely to be written though. For an example of using GCC with FASM, look at RetroForth/BeOS (http://www.retroforth.org/release/ and click on the BeOS logo). It's not hard to use libc at all
Post 26 Jul 2004, 13:07
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
still so far i haven't done something serious, i couldn't tell you what i have been experienced, but it surely will be long and tough way to me.

about RF7, you know, i have downloaded some of it, not yet extract. (lazy_grin)
Post 26 Jul 2004, 13:28
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quote:
about RF7, you know, i have downloaded some of it, not yet extract. (lazy_grin)


It's a lot nicer than the 6.x releases were: smaller, faster, better designed. And it successfully ran my rather large 141MB test program Smile
Post 26 Jul 2004, 13:32
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pelaillo
Missing in inaction


Joined: 19 Jun 2003
Posts: 878
Location: Colombia
pelaillo
crc wrote:
FASM is limited to x86. And it's not GPL, so the FSF wouldn't like it anyway!

Fasm license fall into Artistic License category (BSD like) approved by the FSF. Wink
Post 26 Jul 2004, 14:44
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quote:
Fasm license fall into Artistic License category (BSD like) approved by the FSF


I'm aware of that, but they are rather biased in favor of the GPL. They tolerate other licenses, but I have yet to see a case (outside of a few LGPL libraries) where they distribute/promote use of non-GPL licenses.
Post 26 Jul 2004, 18:13
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pelaillo
Missing in inaction


Joined: 19 Jun 2003
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pelaillo
Some cases: (in no particular order)
Apache
Python
Mozilla
Perl
PHP
Post 26 Jul 2004, 19:25
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scientica
Retired moderator


Joined: 16 Jun 2003
Posts: 689
Location: Linköping, Sweden
scientica
[OT]gas supports an (sadly undocumened) asm syntax stuyle too -via 'asm ".intel_syntax"' (never forget to add '.att_syntax' after you're done with intel style - or the rest of the gas will explode;)). I woner if it would be possible to make add ".fasm_syntax" and have the linker invoke fasm instead of (g)as when parsing the code.... (should work, but I don't have the time to play with yet another source tree...)[/OT]
Post 28 Jul 2004, 12:35
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crc



Joined: 21 Jun 2003
Posts: 637
Location: Penndel, PA [USA]
crc
Quote:
I woner if it would be possible to make add ".fasm_syntax" and have the linker invoke fasm instead of (g)as when parsing the code....


That would be interesting to see, but I don't have the time to learn the LD/GAS source code...
Post 28 Jul 2004, 12:47
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fasm9



Joined: 19 Jun 2003
Posts: 439
fasm9
Hi, here is good tool to convert GAS to NASM!!!

so it obviously easy to nasm to FASM! :D

http://www.multimania.com/placr/a2i.html

Edit: Note that there is some limitation in Math instructions.

--
Thanks to the Author!
Post 19 Aug 2004, 01:49
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