case A: golden top clock = 0 (VBIOS boot clock 0, DPM_GFXCLK disabled) -> DIV_ROUND_UP(x, 0)
Floating point exception (core dumped)
caseA-exit=136
case B: golden gfx_table.count = 0 -> index (uint32_t)0-1 = 4294967295
        effective read offset = 34359738360 bytes past dpm_levels[0] (elem size 8)
wild read returned 0 (no trap; garbage leaked into OD math)
caseB-exit=0
case A: golden top clock = 0 (VBIOS boot clock 0, DPM_GFXCLK disabled) -> DIV_ROUND_UP(x, 0)
caseA-rerun-exit=136
Floating point exception (core dumped)