Mathieu Desnoyers wrote:
> Add asm-compat.h to x86
>
> In assembly code and in gcc inline assembly, we need .long to express a "c long"
> type on i386 and a .quad to express the same on x86_64. Use macros similar to
> powerpc "PPC_LONG" to express those. Name chosen: ASM_LONG. (didn't feel like
> X86_LONG was required).
>
> This is useful in inline assembly within code shared between 32 and 64
> bits architectures in x86.
>
> More compatible assembly macros could be added in this header later when
> needed.
>
> I had to create this to implement a merged optimized immediate values
> header for x86.
>
Seems sound to me, and this header might be a useful place to put other
things, like macros to emit exceptions, etc...
J
> Signed-off-by: Mathieu Desnoyers <[email protected]>
> CC: Thomas Gleixner <[email protected]>
> CC: Ingo Molnar <[email protected]>
> CC: "H. Peter Anvin" <[email protected]>
> ---
> include/asm-x86/asm-compat.h | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> Index: linux-2.6-lttng/include/asm-x86/asm-compat.h
> ===================================================================
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ linux-2.6-lttng/include/asm-x86/asm-compat.h 2007-10-24 09:41:09.000000000 -0400
> @@ -0,0 +1,29 @@
> +#ifndef _ASM_X86_ASM_COMPAT_H
> +#define _ASM_X86_ASM_COMPAT_H
> +
> +#include <asm/types.h>
> +
> +#ifdef __ASSEMBLY__
> +# define stringify_in_c(...) __VA_ARGS__
> +# define ASM_CONST(x) x
> +#else
> +/* This version of stringify will deal with commas... */
> +# define __stringify_in_c(...) #__VA_ARGS__
> +# define stringify_in_c(...) __stringify_in_c(__VA_ARGS__) " "
> +# define __ASM_CONST(x) x##UL
> +# define ASM_CONST(x) __ASM_CONST(x)
> +#endif
> +
> +#ifdef CONFIG_X86_64
> +
> +/* operations for longs and pointers */
> +#define ASM_LONG stringify_in_c(.quad)
> +
> +#else /* 32-bit */
> +
> +/* operations for longs and pointers */
> +#define ASM_LONG stringify_in_c(.long)
> +
> +#endif
> +
> +#endif /* _ASM_X86_ASM_COMPAT_H */
>
>
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