step <spamtrap@[EMAIL PROTECTED]
> wrote:
>
> the code is follow , i used gcc version 4.1.2 20061115 (prerelease)
>and Target: i486-linux-gnu ,
> gcc -g testasm.c -lm -o testasm compile this code ,but get the
>error
>#include <stdio.h>
>#include <stdlib.h>
>
>int main(int argc,char **argv)
>{
> float arg1, arg2, add, sub, mul, div ;
>
> printf( "Enter two numbers : " );
> scanf( "%f%f", &arg1, &arg2 );
>
> /* Perform floating point Addition, Subtraction, Multiplication &
>Division */
> __asm__ ( "fld %1;"
> "fld %2;"
> "fadd;"
> "fstp %0;" : "=g" (add) : "g" (arg1), "g" (arg2) ) ;
gcc does not use the size of the operand to figure out which instruction
to
use. It can't tell the difference between the single and double-precision
instructions, so you have to tell it, by adding a suffix letter.
If you really want singles (which is what you have here with "float"), use
"flds" and "fstps".
--
Tim Roberts, timr@[EMAIL PROTECTED]
& Boekelheide, Inc.
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