NASM 2.05 based x86 Instruction Reference[ch109]
A.5.89 FLDxx: Floating-Point Load Constants 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