1 .arch armv7-m 2 .text 3 .thumb 4 5 mrs r4, apsr 6 mrs r5, eapsr 7 mrs r6, primask 8 msr xpsr_nzcvq, r3 9 msr apsr_nzcvq, r4 10 msr iapsr_nzcvq, r5 11 msr primask, r6 12
