simple assembler program

simple assembler program

[Roman Mashak]

Hello!

    I tried to compile simple assembler program:

#define a 1
#define b 2

.ent main
.global main
main:
        li $3, a
        li $2, b
        addu $4, $2, $3
.end main

I use SDE-lite kit version 5.03.06 and compile with sde-as:
#sde-as test.S -o testtest.S: Assembler messages:
test.S:9: Error: absolute expression required `li'
test.S:10: Error: absolute expression required `li'

When I eliminate #define and use just 'li $3, 1' and so on - everything is
compiled correctly. Where is my problem?

Thanks in advance!

With best regards, Roman Mashak.  E-mail: mrv@tusur.ru

simple assembler program

[Roman Mashak]

Hello!

    I tried to compile simple assembler program:

#define a 1
#define b 2

.ent main
.global main
main:
        li $3, a
        li $2, b
        addu $4, $2, $3
.end main

I use SDE-lite kit version 5.03.06 and compile with sde-as:
#sde-as test.S -o testtest.S: Assembler messages:
test.S:9: Error: absolute expression required `li'
test.S:10: Error: absolute expression required `li'

When I eliminate #define and use just 'li $3, 1' and so on - everything is
compiled correctly. Where is my problem?

Thanks in advance!

With best regards, Roman Mashak.  E-mail: mrv@tusur.ru

Re: simple assembler program

[Jan-Benedict Glaw]

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On Wed, 2004-07-21 14:17:14 +0900, Roman Mashak <mrv@tusur.ru>
wrote in message <002701c46ee1$feeb7fc0$cc20bdd3@roman>:

> #define a 1
> #define b 2
> 
> .ent main
> .global main
> main:
>         li $3, a
>         li $2, b
>         addu $4, $2, $3
> .end main
> 
> I use SDE-lite kit version 5.03.06 and compile with sde-as:
> #sde-as test.S -o testtest.S: Assembler messages:
> test.S:9: Error: absolute expression required `li'
> test.S:10: Error: absolute expression required `li'
> 
> When I eliminate #define and use just 'li $3, 1' and so on - everything is
> compiled correctly. Where is my problem?

Assembler sources aren't commonly fed through a preprocessor, so your
assembler just ignores the comments (your defines) and uses "a" and "b"
as-is.

MfG, JBG

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Re: simple assembler program

[Maciej W. Rozycki]

On Wed, 21 Jul 2004, Jan-Benedict Glaw wrote:

> > #sde-as test.S -o testtest.S: Assembler messages:
> > test.S:9: Error: absolute expression required `li'
> > test.S:10: Error: absolute expression required `li'
> > 
> > When I eliminate #define and use just 'li $3, 1' and so on - everything is
> > compiled correctly. Where is my problem?
> 
> Assembler sources aren't commonly fed through a preprocessor, so your
> assembler just ignores the comments (your defines) and uses "a" and "b"
> as-is.

 However, they would be, based on the file name suffix, which is .S for
assembly to be preprocessed or .s for one not to, if fed to the assembler
via the gcc driver.

  Maciej