<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 19, 2015 at 9:51 PM, nick <span dir="ltr"><<a href="mailto:xerofoify@gmail.com" target="_blank">xerofoify@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Greetings All,<br>
I am wondering what the below code in the asm modifier does:<br>
static inline void set_bit(int nr, void *addr)<br>
{<br>
asm("btsl %1,%0" : "+m" (*(u32 *)addr) : "Ir" (nr));<br>
}<br>
This would be very helpful as I am new to x86 assembly and don't<br>
even known what register(s)/instruction(s) this touches and therefore this<br>
is impossible for me to look up in the Intel Manuals. If someone either<br>
tells me the registers/instructions this uses or explains the code that<br>
would be very helpful.<br>
Nick<br>
<br>
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</blockquote></div><br></div><div class="gmail_extra">get a book on i86 assembly and learn it. <br clear="all"></div><div class="gmail_extra"><br>-- <br><div class="gmail_signature">Thank you <br>Warm Regards<br>Anuz<br></div>
</div></div>