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bits ASM instruction

Posted: Mon Jun 12, 2006 5:44 am
by Guest
Does anyone know what this asm instruction does?

Code: Select all

bits %ireq, 15

Re:bits ASM instruction

Posted: Mon Jun 12, 2006 6:04 am
by Solar
AT&T or NASM?

Hmmm... no such opcode in either the Pentium manuals or Art of Assembly... no such thing in the NASM or GAS manuals either... where did you find it?

Re:bits ASM instruction

Posted: Mon Jun 12, 2006 6:18 am
by Guest
found it in some PowerPC code. But couldnt find anything in that manual either.

Re:bits ASM instruction

Posted: Mon Jun 12, 2006 7:17 am
by Solar
Telling that it's PPC code beforehand could have helped. :D

Nah, I come up empty too. My google-foo is weak today. What does that opcode disassemble into? That might be different, and give a hint...

Re:bits ASM instruction

Posted: Tue Jun 13, 2006 6:52 am
by Kemp
Could it be roughly equivalent to the Intel BTS instruction?