8087 Floating-Point (FP) Coprocessor Instruction Set Architecture (ISA)

The original 8087 Floating-Point (FP) coprocessor instructions:

• ESC #
  8087 Escape Opcodes
• F2XM1
  Compute 2x-1
• FABS
  Absolute Value
• FADD/FADDP/FIADD
  Add
• FBLD
  Load Binary Coded Decimal
• FBSTP
  Store BCD Integer and Pop
• FCHS
  Change Sign
• FCLEX/FNCLEX
  Clear Exceptions
• FCOM/FCOMP/FCOMPP
  Compare Floating Point Values
• FDECSTP
  Decrement Stack-Top Pointer
• FDISI (deprecated)
  Disable Interrupts
• FDIV/FDIVP/FIDIV
  Divide
• FDIVR/FDIVRP/FIDIVR
  Reverse Divide
• FENI (deprecated)
  Enable Interrupts
• FFREE
  Free Floating-Point Register
• FICOM/FICOMP
  Compare Integer
• FILD
  Load Integer
• FINCSTP
  Increment Stack-Top Pointer
• FINIT/FNINIT
  Initialize Floating-Point Unit
• FIST/FISTP
  Store Integer
• FLD
  Load Floating Point Value
• FLD1/FLDL2T/FLDL2E/FLDPI/FLDLG2/FLDLN2/FLDZ
  Load Constant
• FLDCW
  Load x87 FPU Control Word
• FLDENV/FLDENVW
  Load x87 FPU Environment
• FMUL/FMULP/FIMUL
  Multiply
• FNDISI (deprecated)
  Disable Interrupts, No Wait
• FNENI (deprecated)
  Enable Interrupts, No Wait
• FNOP
  No Operation
• FNSAVE/FNSAVEW
  Store x87 FPU State, No Wait
• FNSTENV/FNSTENVW
  Store x87 FPU Environment, No Wait
• FPATAN
  Partial Arctangent
• FPREM
  Partial Remainder
• FPTAN
  Partial Tangent
• FRNDINT
  Round to Integer
• FRSTOR/FRSTORW
  Restore x87 FPU State
• FSAVE/FSAVEW
  Store x87 FPU State
• FSCALE
  Scale
• FSQRT
  Square Root
• FST/FSTP
  Store Floating Point Value
• FSTCW/FNSTCW
  Store x87 FPU Control Word
• FSTENV/FSTENVW
  Store x87 FPU Environment
• FSTSW/FNSTSW
  Store x87 FPU Status Word
• FSUB/FSUBP/FISUB
  Subtract
• FSUBR/FSUBRP/FISUBR
  Reverse Subtract
• FTST
  TEST
• FWAIT
  Wait
• FXAM
  ExamineModR/M
• FXCH
  Exchange Register Contents
• FXTRACT
  Extract Exponent and Significand
• FYL2X
  Compute y * log2X
• FYL2XP1
  Compute y * log2(X+1)