ref: 55eddf2f2cd9d53ef6f576ddb47cee7b5c1b436b 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