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Inline Assembly coding

Divya G S
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  • Note: This was originally posted on 11th August 2011 at http://forums.arm.com

    Hi,
    I am also a newbie of asm. Can any one help to explain below GCC function codes, what are the meaning of the :"cc"?
    Thanks in advance!
    -----------------------------------

    static inline unsigned int read_cpuid(void)
    {
    unsigned int val;

    /* Main ID register (MIDR) */
    asm("mrc        p15, 0, %0, c0, c0, 0"
        : "=r" (val)
        :
       : "cc"); //What's this means?

    return val;
    }
    --------------------------------
Reply
  • Note: This was originally posted on 11th August 2011 at http://forums.arm.com

    Hi,
    I am also a newbie of asm. Can any one help to explain below GCC function codes, what are the meaning of the :"cc"?
    Thanks in advance!
    -----------------------------------

    static inline unsigned int read_cpuid(void)
    {
    unsigned int val;

    /* Main ID register (MIDR) */
    asm("mrc        p15, 0, %0, c0, c0, 0"
        : "=r" (val)
        :
       : "cc"); //What's this means?

    return val;
    }
    --------------------------------
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