ref: d540dcf6834b4bec8a2d21f2fe95eccf49f97b03 dir: /libkern/getfcr-arm.s/
TEXT setfcr(SB), $0 RET TEXT getfcr(SB), $0 RET TEXT getfsr(SB), $0 RET TEXT setfsr(SB), $0 RET