Hi Ian,
Thanks for the quick response. It worked. You saved me.
thanks and regards,
Isuru
--- On Tue, 12/22/09, Ian Lance Taylor <iant@xxxxxxxxxx> wrote:
> From: Ian Lance Taylor <iant@xxxxxxxxxx>
> Subject: Re: Force inline without -O2
> To: "isuru herath" <isuru81@xxxxxxxxx>
> Cc: gcc-help@xxxxxxxxxxx
> Date: Tuesday, December 22, 2009, 9:55 AM
> isuru herath <isuru81@xxxxxxxxx>
> writes:
>
> > I am writing a C code with inline method.
> >
> > static inline unsigned int READ()
> > {
> > unsigned long data;
> > asm volatile ("movl %%eax, %0" : "=g" (data) : );
> > return (unsigned int) data;
> > }
> >
> > I dont want to this appear as a method call in the executable. I want
> > to make in inlined to the code. I tried different methods.
> >
> > 1. I compiled with -finline-functions. Still it apears as a method call
> > in the assembly generated.
> >
> > 2. Used the attribute __attribute__((always_inline));. Still it appears
> > as a method call.
> >
> > But when I compiled with -O2 it doesnot make it a method call. But for
> > my current work I cannot have optimizations enabled. Therefore I am
> > looking for a way to inline this function in the assembly generated. I
> > am not sure I can achieve this behavior with macros since I need to
> > return data from it.
>
> The compiler generally does not inline functions if you are not
> optimizing.
>
> If you must have this be inline even when not optimizing, I think you
> will need to use a macro.
>
> #define READ() \
> ({ \
> unsigned long data; \
> asm volatile ("movl %%eax, %0", : "=g" (data)); \
> data; \
> })
>
> Ian
>
