ref: 91f14160d425ce557a3fc589b9286fd82c56b7a8 dir: /libkern/getfcr-thumb.s/
THUMB=4 TEXT setfcr(SB), THUMB, $0 RET TEXT getfcr(SB), THUMB, $0 RET TEXT getfsr(SB), THUMB, $0 RET TEXT setfsr(SB), THUMB, $0 RET