Re: GCC asm in-line on 386 code?

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Article #50726

#50726

From: Michael Strauch
Date: Mon, 16 Aug 1993 10:24

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jzh@abb-sc.abb-sc.com (Jason Huang) writes:

>Anybody like to point me out on assembler instruction
>using 'asm' please? For I/O instructions, IN AL,DX; OUT DX,AL.

Try this one: asm("inb %dx,%al");
              asm("outb %al,%dx");

This is not INTEL syntax, but AT&T syntax. The main difference is the
sequence of the operands - in AT&T syntax the first one is the source
operand and the second one is the destination operand. For a
full description get a complete GAS manual (written in TeX) from
one of the various ftp-servers. It contains a lot of machine dependent
stuff especially for the '386.

- Michael Strauch -
strauch@emmy.mathematik.uni-dortmund.de

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From: strauch@emmy.mathematik.uni-dortmund.de (Michael Strauch)
Newsgroups: gnu.gcc.help
Subject: Re: GCC asm in-line on 386 code?
Date: 16 Aug 1993 10:24:57 GMT
Organization: Universitaet Dortmund, CT, Germany
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