Important Notice
The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
FSUB/FSUBP/FISUB
◄Summary► ◄Timings► ◄Example►
────────────────┬─────────────────────────┬────────────────────────────────
FSUB [reg,reg] │ fsub st,st(2) │ 87 70-100
│ fsub st(5),st │ 287 70-100
│ fsub │ 387 t=29-37,f=26-34
────────────────┼─────────────────────────┼────────────────────────────────
FSUBP reg,ST │ fsubp st(6),st │ 87 75-105
│ │ 287 75-105
│ │ 387 26-34
────────────────┼─────────────────────────┼────────────────────────────────
FSUB memreal │ fsub longreal │ 87 (s=90-120,s=95-125)+EA
│ fsub shortreals[di] │ 287 s=90-120,l=95-125
│ │ 387 s=24-32,l=28-36
────────────────┼─────────────────────────┼────────────────────────────────
FISUB memint │ fisub double │ 87 (w=102-137,d=108-143)+EA
│ fisub warray[di] │ 287 w=102-137,d=108-143
│ │ 387 w=71-83,d=57-82
────────────────┴─────────────────────────┴────────────────────────────────
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