ref: 83fea560c31e90807d9a2fa25a749027812ea17f
dir: /lib/math/ftrap-impl+posixy-x64.s/
.globl _math$fptrap .globl math$fptrap _math$fptrap: math$fptrap: subq $4,%rsp wait stmxcsr (%rsp) movl (%rsp),%eax andl $~0x1f80,%eax testb %dil,%dil jnz .apply orl $0x1f80,%eax .apply: movl %eax,(%rsp) ldmxcsr (%rsp) addq $4,%rsp ret