.set noat # allow manual use of $at .set noreorder # don't insert nops after branches glabel IP6_Hdlr /* 46044 8006AC44 2401DFFF */ addiu $at, $zero, -0x2001 /* 46048 8006AC48 1000FFF0 */ b next_interrupt /* 4604C 8006AC4C 02018024 */ and $s0, $s0, $at