Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
MASM Index
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   @F operand                Local Code Labels
    F2XM1 instruction        Calculate 2(^X)-1
    FABS instruction         Absolute Value
    FADD instruction         Floating-Point Add
    FADDP instruction        Floating-Point Add and Pop
    FARDATA directive        Start a Far Data Segment
   @fardata macro            Far Data Location Macro
    FARDATA? directive       Start a FAR Undefined Segment
   @fardata? macro           Undefined Far Data Location Macro
    FBLD instruction         BCD Load
    FBSTP instruction        Store BCD ST and Pop
    FCHS instruction         Change Sign
    FCLEX instruction        Clear Exceptions
    FCOM instruction         Floating-Point Compare
    FCOMP instruction        Floating-Point Compare and Pop
    FCOMPP instruction       Floating-Point Compare and Pop 2x
    FCOS instruction         Cosine
    FDECSTP instruction      Decrement Stack Pointer
    FDISI instruction        Disable Coprocessor Interrupts
    FDIV instruction         Floating-Point Divide
    FDIVP instruction        Floating-Point Divide and Pop
    FDIVR instruction        Floating-Point Divide Reversed
    FDIVRP instruction       Floating-Point Divide Reversed and Pop
    FENI instruction         Enable Coprocessor Interrupts
    FFREE instruction        Free Register
    FIADD instruction        Integer Add
    FICOM instruction        Integer Compare
    FICOMP instruction       Integer Compare and Pop
    FIDIV instruction        Integer Divide
    FIDIVR instruction       Integer Divide Reversed
    FILD instruction         Integer Load
    file access              File Control Block (FCB)
    file operations          Int 21h
    file operations (FCB)    Int 21h
   @FileCur macro            Current Source Filename Macro
   @FileName macro           Current Base Source Filename Macro
    FIMUL instruction        Integer Multiply
    FINCSTP instruction      Increment Stack Pointer
    FINIT instruction        Initialize Coprocessor
    FIST instruction         Store Integer ST
    FISTP instruction        Store Integer ST and Pop
    FISUB instruction        Integer Subtract
    FISUBR instruction       Integer Subtract Reversed
    flags, 8086-family       Processor Flag Summary
    FLAT                     Select Segment Size
    FLD instruction          Floating-Point Load
    FLD1 instruction         Load Constant 1.0
    FLDCW instruction        Load Control Word
    FLDENV instruction       Load Environment State (Byte)
    FLDENVD instruction      Load Environment State (Doubleword)
    FLDENVW instruction      Load Environment State (Word)
    FLDL2E instruction       Load Constant Log2(e)
    FLDL2T instruction       Load Constant Log2(10)
    FLDLG2 instruction       Load Constant Log10(2)
    FLDLN2 instruction       Load Constant Ln(2)
    FLDPI instruction        Load Constant Pi
    FLDZ instruction         Load Constant 0.0
    floating-point control   Control-Flow Instructions
    floating-point
       data transfer         Coprocessor Instructions
    FMUL instruction         Floating-Point Multiply
    FMULP instruction        Floating-Point Multiply and Pop
    FNCLEX instruction       Clear Exceptions (No Wait)
    FNDISI instruction       Disable Interrupts (No Wait)
    FNENI instruction        Enable Interrupts (No Wait)
    FNINIT instruction       Initialize Coprocessor (No Wait)
    FNOP instruction         No Operation
    FNSAVE instruction       Save Coprocessor State (No Wait)
    FNSAVED instruction      Save Coprocessor State (No Wait)
    FNSAVEW instruction      Save Coprocessor State (No Wait)
    FNSTCW instruction       Store Control Word (No Wait)
    FNSTENV instruction      Store Environment State (Byte, No Wait)
    FNSTENVD instruction     Store Environment State (Doubleword, No Wait)
    FNSTENVW instruction     Store Environment State (Word, No Wait)
    FNSTSW instruction       Store Status Word
    FOR directive            Iterative Assembly (for Character)
    FORC directive           Iterative Macro (for Character)
    FORCEFRAME attribute     Define Procedure
    formatting source code   Statement Format
    FORTRAN
       calling convention    Definition of Language Type
    FPATAN instruction       Partial Arctangent
    FPREM instruction        Partial Remainder
    FPREM1 instruction       Partial Remainder
    FPTAN instruction        Partial Tangent
    FRNDINT instruction      Round to Integer
    FRSTOR instruction       Store Coprocessor State (Byte)
    FRSTORD instruction      Store Coprocessor State (Doubleword)
    FRSTORW instruction      Store Coprocessor State (Word)
    FSAVE instruction        Save Coprocessor State (Byte)
    FSAVED instruction       Save Coprocessor State (Doubleword)
    FSAVEW instruction       Save Coprocessor State (Word)
    FSCALE instruction       Scale
    FSETPM instruction       Set Protected Mode
    FSIN instruction         Sine
    FSINCOS instruction      Sine/Cosine
    FSQRT instruction        Square Root
    FST instruction          Store Floating-Point ST
    FSTCW instruction        Store Control Word
    FSTENV instruction       Store Environment State (Byte)
    FSTENVD instruction      Store Environment State (Doubleword)
    FSTENVW instruction      Store Environment State (Word)
    FSTP instruction         Store Floating-Point ST and Pop
    FSTSW instruction        Store Status Word
    FSUB instruction         Floating-Point Subtract
    FSUBP instruction        Floating-Point Subtract and Pop
    FSUBR instruction        Floating-Point Subtract Reversed
    FSUBRP instruction       Floating-Point Subtract Reversed and Pop
    FTST instruction         Test for Zero
    FUCOM instruction        Unordered Compare
    FUCOMP instruction       Unordered Compare and Pop
    FUCOMPP instruction      Unordered Compare and Pop 2x
    full segment definitions Complete Segment Control
    FWAIT instruction        Wait
    FWORD directive          Declare Variables (Farword)
    FXAM instruction         Examine ST
    FXCH instruction         Exchange Registers
    FXTRACT instruction      Extract Exponent and Significand
    FYL2X instruction        Y log(sub2)(X)
    FYL2XP1 instruction      Y log(sub2)(X+1)
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