;--- floating-point for cpu < 80286
;--- check FWAIT generation
.8086
.model small
.dosseg
.stack 200h
option casemap:none
.code
start:
fclex ;AP_FWAIT set, FWAIT always added
fmul ;automatic FWAIT added if cpu < 80286
fnclex ;AP_NO_FWAIT set, NO FWAIT added
fwait ;nothing added
.186
fmul ;automatic FWAIT added if cpu < 80286
.286
fclex
fmul ;nothing added here!
fnclex
fwait
fsetpm ;the only instruction for 287 without AP prefix
mov ah,4Ch
int 21h
End start