lkml.org 
[lkml]   [2007]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 4/8] 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.

    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
    CC: Thomas Gleixner <tglx@linutronix.de>
    CC: Ingo Molnar <mingo@elte.hu>
    CC: "H. Peter Anvin" <hpa@zytor.com>
    ---
    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 2007-11-01 22:43:09.000000000 -0400
    @@ -0,0 +1,29 @@
    +#ifndef _ASM_X86_ASM_COMPAT_H
    +#define _ASM_X86_ASM_COMPAT_H
    +
    +#include <linux/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 */
    --
    Mathieu Desnoyers
    Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
    OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-11-13 20:07    [W:0.023 / U:0.116 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site