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FIDIV           Integer divide                       Exceptions: I D Z O U P
FIDIVR          Integer divide reversed              C3 C2 C1 C0: ? ? * ?

FIDIV source
FIDIVR source

                ; FIDIV                 ; FIDIVR
        Logic   ST . ST/source          ST . source/ST

    FIDIV divides ST by a (word or short integer) memory operand and
    stores the quotient in ST.

    FIDIVR divides a (word or short integer) memory operand by ST and
    stores the quotient in ST.


    Opcode      Format
    DA /6       FIDIV m32
    DE /6       FIDIV m16
    DA /7       FIDIVR m32
    DE /7       FIDIVR m16


    Timing
    Variations/
    operand       8087         287        387      486     Pentium
    fidiv  m16   (224-238)+EA  224-238  136-140   85-89    42      NP
    fidiv  m32   (230-243)+EA  230-243  120-127   84-86    42      NP
    fidivr m16   (225-239)+EA  225-239  135-141   85-89    42      NP
    fidivr m32   (231-245)+EA  231-245  121-128   84-86    42      NP