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(nasm.info)Section B.4.89

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B.4.89. `FLDxx': Floating-Point Load Constants
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     FLD1                          ; D9 E8                [8086,FPU]
     FLDL2E                        ; D9 EA                [8086,FPU]
     FLDL2T                        ; D9 E9                [8086,FPU]
     FLDLG2                        ; D9 EC                [8086,FPU]
     FLDLN2                        ; D9 ED                [8086,FPU]
     FLDPI                         ; D9 EB                [8086,FPU]
     FLDZ                          ; D9 EE                [8086,FPU]

   These instructions push specific standard constants on the FPU
register stack.

      Instruction    Constant pushed

      FLD1           1
      FLDL2E         base-2 logarithm of e
      FLDL2T         base-2 log of 10
      FLDLG2         base-10 log of 2
      FLDLN2         base-e log of 2
      FLDPI          pi
      FLDZ           zero