MIPS_CPU_FTLB
#define cpu_has_ftlb __opt(MIPS_CPU_FTLB)
c->options |= MIPS_CPU_FTLB | MIPS_CPU_TLBINV | MIPS_CPU_LDPTE;
c->options |= MIPS_CPU_TLB | MIPS_CPU_FTLB;