ref: f8935b5778397074d41a48205e5c7f87d7b531fe dir: purgatorio/libkern/getfcr-arm.s
TEXT setfcr(SB), $0 RET TEXT getfcr(SB), $0 RET TEXT getfsr(SB), $0 RET TEXT setfsr(SB), $0 RET