nx_sass_sched.nx

nx_sass_sched.nx -- conservative SASS instruction SCHEDULER (the scheduling-POLICY layer toward a runnable kernel; pairs with the nx_mma_asm encoder + nv_control). Given an instruction sequence (per-instr: written register, read registers, variable-latency flag), it assigns a scoreboard BARRIER to each variable-latency write (loads/MMA) and computes each instruction's WAIT mask so EVERY data dependency (RAW) is covered. CONSERVATIVE = provably CORRECT (serialize on every dependency), not yet optimal -- the "make it run" pass; minimizing stalls/barriers = a later optimization pass. Emits the control word per instr via nv_control. Pure funcs, no main. license_tier: ORIGINAL