How to suppress parsing, preprocessing of code with the signature "__ASM volatile rbit(x)"

Question

I am unit testing embedded code on a host environment (vectorcast).

The code is devloped using an arm-eabi compiler on the target hardware. We are testing it on desktop without any simulator or hardware interface.

I am using mingw - 4.5 gcc compiler. Often there is are lot of assembly code in header files like:

__attribute__( ( always_inline ) ) __STATIC_INLINE uint32_t __RBIT(uint32_t value)
{  uint32_t result;   

__ASM volatile ("rbit %0, %1" : "=r" (result) : "r" (value) );

return(result);}

While testing my source unit say x1.c, it calls a function like defined above in an included header file. When I try compiling this, I get the following error:

Error: no such instruction: `rbit %ebx,%eax'

Is there any gcc switch that when used for options, ignores code prefixed with __asm?

Any other solution is also welcome.