Borland/Microsoft languages - Floating Point emulation


        The two bytes following the INT 3E instruction are the subcode and
        a NOP (90h)

        Subcode               Function

         DCh            Load 8086 Stack with 8087 Registers
         DEh            Load 8087 Registers from 8086 Stack
         E0h            ??? (possibly check of form A <= X <= B)
         E2h            ???
         E4h            compare TOS/R1 with two POP's
         E6h            compare TOS/R1 with POP
         E8h            FTST (check TOS value)
         EAh            FXAM (check TOS value)
         ECh            Sin
         EEh            Cos
         F0h            ArcTan
         F2h            check TOS value
         F4h            Ln (FLDLN2 to TOS)
         F6h            FLD1 to TOS
         F8h            FLDLG2 to TOS
         FAh            Exp (FLDL2E to TOS)
         FCh            ???
         FEh            FLDL2T to TOS