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    Subject[PATCH 0/1] x86 change mov 0, %reg to xor %reg, %reg
    Date
    Hello Linux x86 maintainers,

    I'm an informatic student 19 y.o. I am still studying Linux kernel open
    source in GNU/Weeb community. I want to be a linux kerne dev in the
    future. This is my first time sending a patch to Linux Kernel, I am
    still learning the community. I may make a mistake in this email, please
    correct me if i am wrong

    I want to improve x86-64 assembly code with this patch. This patch
    changes mov $0, %reg with xor %reg, %reg because xor %reg, %reg is
    smaller so it is good to save space

    asm:
    ba 00 00 00 00 mov $0x0,%edx
    31 d2 xor %edx,%edx


    Regards,

    Signed-off-by: Kanna Scarlet <knscarlet@gnuweeb.org>
    ---

    Kanna Scarlet (1):
    x86: Change mov $0, %reg with xor %reg, %reg

    arch/x86/boot/compressed/head_64.S | 2 +-
    arch/x86/boot/compressed/mem_encrypt.S | 2 +-
    arch/x86/kernel/ftrace_32.S | 4 ++--
    arch/x86/kernel/head_64.S | 2 +-
    arch/x86/math-emu/div_Xsig.S | 2 +-
    arch/x86/math-emu/reg_u_sub.S | 2 +-
    6 files changed, 7 insertions(+), 7 deletions(-)


    base-commit: ff89dd08c0f0a3fd330c9ef9d775e880f82c291e
    --
    Kanna Scarlet

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