# Floating Point instruction tests # Format: RawBytes;Instructions RawBytes;Instructions # Basic FPU instructions # FADD - Add floating point values # ST(0), ST(i) form (D8 C0+i) D8C0;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(0)"] }] D8C1;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(1)"] }] D8C2;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(2)"] }] D8C3;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(3)"] }] D8C4;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(4)"] }] D8C5;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(5)"] }] D8C6;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(6)"] }] D8C7;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(7)"] }] # ST(i), ST(0) form (DC C0+i) DCC0;[{ "Type": "Fadd", "Operands": ["ST(0)", "ST(0)"] }] DCC1;[{ "Type": "Fadd", "Operands": ["ST(1)", "ST(0)"] }] DCC2;[{ "Type": "Fadd", "Operands": ["ST(2)", "ST(0)"] }] DCC3;[{ "Type": "Fadd", "Operands": ["ST(3)", "ST(0)"] }] DCC4;[{ "Type": "Fadd", "Operands": ["ST(4)", "ST(0)"] }] DCC5;[{ "Type": "Fadd", "Operands": ["ST(5)", "ST(0)"] }] DCC6;[{ "Type": "Fadd", "Operands": ["ST(6)", "ST(0)"] }] DCC7;[{ "Type": "Fadd", "Operands": ["ST(7)", "ST(0)"] }] # Memory operands D8042510000000;[{ "Type": "Fadd", "Operands": ["dword ptr [0x10]"] }] DC042510000000;[{ "Type": "Fadd", "Operands": ["qword ptr [0x10]"] }] D80425;[{ "Type": "Fadd", "Operands": ["dword ptr [eax]"] }] DC0425;[{ "Type": "Fadd", "Operands": ["qword ptr [eax]"] }] D8041D;[{ "Type": "Fadd", "Operands": ["dword ptr [ebx]"] }] DC041D;[{ "Type": "Fadd", "Operands": ["qword ptr [ebx]"] }] D8042D;[{ "Type": "Fadd", "Operands": ["dword ptr [ebp]"] }] DC042D;[{ "Type": "Fadd", "Operands": ["qword ptr [ebp]"] }] # With segment override prefixes 26D80425;[{ "Type": "Fadd", "Operands": ["dword ptr es:[eax]"] }] 2ED80425;[{ "Type": "Fadd", "Operands": ["dword ptr cs:[eax]"] }] 36D80425;[{ "Type": "Fadd", "Operands": ["dword ptr ss:[eax]"] }] 3ED80425;[{ "Type": "Fadd", "Operands": ["dword ptr ds:[eax]"] }] 64D80425;[{ "Type": "Fadd", "Operands": ["dword ptr fs:[eax]"] }] 65D80425;[{ "Type": "Fadd", "Operands": ["dword ptr gs:[eax]"] }] # FADDP - Add floating point values and pop DEC0;[{ "Type": "Faddp", "Operands": ["ST(0)", "ST(0)"] }] DEC1;[{ "Type": "Faddp", "Operands": ["ST(1)", "ST(0)"] }] DEC2;[{ "Type": "Faddp", "Operands": ["ST(2)", "ST(0)"] }] DEC3;[{ "Type": "Faddp", "Operands": ["ST(3)", "ST(0)"] }] DEC4;[{ "Type": "Faddp", "Operands": ["ST(4)", "ST(0)"] }] DEC5;[{ "Type": "Faddp", "Operands": ["ST(5)", "ST(0)"] }] DEC6;[{ "Type": "Faddp", "Operands": ["ST(6)", "ST(0)"] }] DEC7;[{ "Type": "Faddp", "Operands": ["ST(7)", "ST(0)"] }] # FIADD - Add integer to floating point DA042510000000;[{ "Type": "Fiadd", "Operands": ["dword ptr [0x10]"] }] DE042510000000;[{ "Type": "Fiadd", "Operands": ["word ptr [0x10]"] }] DA0425;[{ "Type": "Fiadd", "Operands": ["dword ptr [eax]"] }] DE0425;[{ "Type": "Fiadd", "Operands": ["word ptr [eax]"] }] DA041D;[{ "Type": "Fiadd", "Operands": ["dword ptr [ebx]"] }] DE041D;[{ "Type": "Fiadd", "Operands": ["word ptr [ebx]"] }] # Floating Point instruction tests (continued) # Format: RawBytes;Instructions RawBytes;Instructions # FSUB - Subtract floating point values # ST(0), ST(i) form (D8 E0+i) D8E0;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(0)"] }] D8E1;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(1)"] }] D8E2;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(2)"] }] D8E3;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(3)"] }] D8E4;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(4)"] }] D8E5;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(5)"] }] D8E6;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(6)"] }] D8E7;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(7)"] }] # ST(i), ST(0) form (DC E8+i) DCE8;[{ "Type": "Fsub", "Operands": ["ST(0)", "ST(0)"] }] DCE9;[{ "Type": "Fsub", "Operands": ["ST(1)", "ST(0)"] }] DCEA;[{ "Type": "Fsub", "Operands": ["ST(2)", "ST(0)"] }] DCEB;[{ "Type": "Fsub", "Operands": ["ST(3)", "ST(0)"] }] DCEC;[{ "Type": "Fsub", "Operands": ["ST(4)", "ST(0)"] }] DCED;[{ "Type": "Fsub", "Operands": ["ST(5)", "ST(0)"] }] DCEE;[{ "Type": "Fsub", "Operands": ["ST(6)", "ST(0)"] }] DCEF;[{ "Type": "Fsub", "Operands": ["ST(7)", "ST(0)"] }] # Memory operands D8242510000000;[{ "Type": "Fsub", "Operands": ["dword ptr [0x10]"] }] DC242510000000;[{ "Type": "Fsub", "Operands": ["qword ptr [0x10]"] }] D82425;[{ "Type": "Fsub", "Operands": ["dword ptr [eax]"] }] DC2425;[{ "Type": "Fsub", "Operands": ["qword ptr [eax]"] }] # FSUBP - Subtract floating point values and pop DEE8;[{ "Type": "Fsubp", "Operands": ["ST(0)", "ST(0)"] }] DEE9;[{ "Type": "Fsubp", "Operands": ["ST(1)", "ST(0)"] }] DEEA;[{ "Type": "Fsubp", "Operands": ["ST(2)", "ST(0)"] }] DEEB;[{ "Type": "Fsubp", "Operands": ["ST(3)", "ST(0)"] }] # FISUB - Subtract integer from floating point DA242510000000;[{ "Type": "Fisub", "Operands": ["dword ptr [0x10]"] }] DE242510000000;[{ "Type": "Fisub", "Operands": ["word ptr [0x10]"] }] DA2425;[{ "Type": "Fisub", "Operands": ["dword ptr [eax]"] }] DE2425;[{ "Type": "Fisub", "Operands": ["word ptr [eax]"] }] # FSUBR - Subtract floating point values (reversed) # ST(0), ST(i) form (D8 E8+i) D8E8;[{ "Type": "Fsubr", "Operands": ["ST(0)", "ST(0)"] }] D8E9;[{ "Type": "Fsubr", "Operands": ["ST(0)", "ST(1)"] }] D8EA;[{ "Type": "Fsubr", "Operands": ["ST(0)", "ST(2)"] }] D8EB;[{ "Type": "Fsubr", "Operands": ["ST(0)", "ST(3)"] }] # ST(i), ST(0) form (DC E0+i) DCE0;[{ "Type": "Fsubr", "Operands": ["ST(0)", "ST(0)"] }] DCE1;[{ "Type": "Fsubr", "Operands": ["ST(1)", "ST(0)"] }] DCE2;[{ "Type": "Fsubr", "Operands": ["ST(2)", "ST(0)"] }] DCE3;[{ "Type": "Fsubr", "Operands": ["ST(3)", "ST(0)"] }] # Memory operands D82C2510000000;[{ "Type": "Fsubr", "Operands": ["dword ptr [0x10]"] }] DC2C2510000000;[{ "Type": "Fsubr", "Operands": ["qword ptr [0x10]"] }] D82C25;[{ "Type": "Fsubr", "Operands": ["dword ptr [eax]"] }] DC2C25;[{ "Type": "Fsubr", "Operands": ["qword ptr [eax]"] }] # FSUBRP - Subtract floating point values (reversed) and pop DEE0;[{ "Type": "Fsubrp", "Operands": ["ST(0)", "ST(0)"] }] DEE1;[{ "Type": "Fsubrp", "Operands": ["ST(1)", "ST(0)"] }] DEE2;[{ "Type": "Fsubrp", "Operands": ["ST(2)", "ST(0)"] }] DEE3;[{ "Type": "Fsubrp", "Operands": ["ST(3)", "ST(0)"] }] # Floating Point instruction tests (continued) # Format: RawBytes;Instructions RawBytes;Instructions # FMUL - Multiply floating point values # ST(0), ST(i) form (D8 C8+i) D8C8;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(0)"] }] D8C9;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(1)"] }] D8CA;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(2)"] }] D8CB;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(3)"] }] D8CC;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(4)"] }] D8CD;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(5)"] }] D8CE;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(6)"] }] D8CF;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(7)"] }] # ST(i), ST(0) form (DC C8+i) DCC8;[{ "Type": "Fmul", "Operands": ["ST(0)", "ST(0)"] }] DCC9;[{ "Type": "Fmul", "Operands": ["ST(1)", "ST(0)"] }] DCCA;[{ "Type": "Fmul", "Operands": ["ST(2)", "ST(0)"] }] DCCB;[{ "Type": "Fmul", "Operands": ["ST(3)", "ST(0)"] }] DCCC;[{ "Type": "Fmul", "Operands": ["ST(4)", "ST(0)"] }] DCCD;[{ "Type": "Fmul", "Operands": ["ST(5)", "ST(0)"] }] DCCE;[{ "Type": "Fmul", "Operands": ["ST(6)", "ST(0)"] }] DCCF;[{ "Type": "Fmul", "Operands": ["ST(7)", "ST(0)"] }] # Memory operands D80C2510000000;[{ "Type": "Fmul", "Operands": ["dword ptr [0x10]"] }] DC0C2510000000;[{ "Type": "Fmul", "Operands": ["qword ptr [0x10]"] }] D80C25;[{ "Type": "Fmul", "Operands": ["dword ptr [eax]"] }] DC0C25;[{ "Type": "Fmul", "Operands": ["qword ptr [eax]"] }] # FMULP - Multiply floating point values and pop DEC8;[{ "Type": "Fmulp", "Operands": ["ST(0)", "ST(0)"] }] DEC9;[{ "Type": "Fmulp", "Operands": ["ST(1)", "ST(0)"] }] DECA;[{ "Type": "Fmulp", "Operands": ["ST(2)", "ST(0)"] }] DECB;[{ "Type": "Fmulp", "Operands": ["ST(3)", "ST(0)"] }] # FIMUL - Multiply integer with floating point DA0C2510000000;[{ "Type": "Fimul", "Operands": ["dword ptr [0x10]"] }] DE0C2510000000;[{ "Type": "Fimul", "Operands": ["word ptr [0x10]"] }] DA0C25;[{ "Type": "Fimul", "Operands": ["dword ptr [eax]"] }] DE0C25;[{ "Type": "Fimul", "Operands": ["word ptr [eax]"] }] # FDIV - Divide floating point values # ST(0), ST(i) form (D8 F0+i) D8F0;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(0)"] }] D8F1;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(1)"] }] D8F2;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(2)"] }] D8F3;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(3)"] }] D8F4;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(4)"] }] D8F5;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(5)"] }] D8F6;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(6)"] }] D8F7;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(7)"] }] # ST(i), ST(0) form (DC F8+i) DCF8;[{ "Type": "Fdiv", "Operands": ["ST(0)", "ST(0)"] }] DCF9;[{ "Type": "Fdiv", "Operands": ["ST(1)", "ST(0)"] }] DCFA;[{ "Type": "Fdiv", "Operands": ["ST(2)", "ST(0)"] }] DCFB;[{ "Type": "Fdiv", "Operands": ["ST(3)", "ST(0)"] }] DCFC;[{ "Type": "Fdiv", "Operands": ["ST(4)", "ST(0)"] }] DCFD;[{ "Type": "Fdiv", "Operands": ["ST(5)", "ST(0)"] }] DCFE;[{ "Type": "Fdiv", "Operands": ["ST(6)", "ST(0)"] }] DCFF;[{ "Type": "Fdiv", "Operands": ["ST(7)", "ST(0)"] }] # Memory operands D8342510000000;[{ "Type": "Fdiv", "Operands": ["dword ptr [0x10]"] }] DC342510000000;[{ "Type": "Fdiv", "Operands": ["qword ptr [0x10]"] }] D83425;[{ "Type": "Fdiv", "Operands": ["dword ptr [eax]"] }] DC3425;[{ "Type": "Fdiv", "Operands": ["qword ptr [eax]"] }] # Floating Point instruction tests (continued) # Format: RawBytes;Instructions RawBytes;Instructions # FDIVP - Divide floating point values and pop DEF8;[{ "Type": "Fdivp", "Operands": ["ST(0)", "ST(0)"] }] DEF9;[{ "Type": "Fdivp", "Operands": ["ST(1)", "ST(0)"] }] DEFA;[{ "Type": "Fdivp", "Operands": ["ST(2)", "ST(0)"] }] DEFB;[{ "Type": "Fdivp", "Operands": ["ST(3)", "ST(0)"] }] # FIDIV - Divide integer by floating point DA342510000000;[{ "Type": "Fidiv", "Operands": ["dword ptr [0x10]"] }] DE342510000000;[{ "Type": "Fidiv", "Operands": ["word ptr [0x10]"] }] DA3425;[{ "Type": "Fidiv", "Operands": ["dword ptr [eax]"] }] DE3425;[{ "Type": "Fidiv", "Operands": ["word ptr [eax]"] }] # FDIVR - Divide floating point values (reversed) # ST(0), ST(i) form (D8 F8+i) D8F8;[{ "Type": "Fdivr", "Operands": ["ST(0)", "ST(0)"] }] D8F9;[{ "Type": "Fdivr", "Operands": ["ST(0)", "ST(1)"] }] D8FA;[{ "Type": "Fdivr", "Operands": ["ST(0)", "ST(2)"] }] D8FB;[{ "Type": "Fdivr", "Operands": ["ST(0)", "ST(3)"] }] # ST(i), ST(0) form (DC F0+i) DCF0;[{ "Type": "Fdivr", "Operands": ["ST(0)", "ST(0)"] }] DCF1;[{ "Type": "Fdivr", "Operands": ["ST(1)", "ST(0)"] }] DCF2;[{ "Type": "Fdivr", "Operands": ["ST(2)", "ST(0)"] }] DCF3;[{ "Type": "Fdivr", "Operands": ["ST(3)", "ST(0)"] }] # Memory operands D83C2510000000;[{ "Type": "Fdivr", "Operands": ["dword ptr [0x10]"] }] DC3C2510000000;[{ "Type": "Fdivr", "Operands": ["qword ptr [0x10]"] }] D83C25;[{ "Type": "Fdivr", "Operands": ["dword ptr [eax]"] }] DC3C25;[{ "Type": "Fdivr", "Operands": ["qword ptr [eax]"] }] # FDIVRP - Divide floating point values (reversed) and pop DEF0;[{ "Type": "Fdivrp", "Operands": ["ST(0)", "ST(0)"] }] DEF1;[{ "Type": "Fdivrp", "Operands": ["ST(1)", "ST(0)"] }] DEF2;[{ "Type": "Fdivrp", "Operands": ["ST(2)", "ST(0)"] }] DEF3;[{ "Type": "Fdivrp", "Operands": ["ST(3)", "ST(0)"] }] # FIDIVR - Divide floating point by integer (reversed) DA3C2510000000;[{ "Type": "Fidivr", "Operands": ["dword ptr [0x10]"] }] DE3C2510000000;[{ "Type": "Fidivr", "Operands": ["word ptr [0x10]"] }] DA3C25;[{ "Type": "Fidivr", "Operands": ["dword ptr [eax]"] }] DE3C25;[{ "Type": "Fidivr", "Operands": ["word ptr [eax]"] }] # FLD - Load floating point value D9C0;[{ "Type": "Fld", "Operands": ["ST(0)"] }] D9C1;[{ "Type": "Fld", "Operands": ["ST(1)"] }] D9C2;[{ "Type": "Fld", "Operands": ["ST(2)"] }] D9C3;[{ "Type": "Fld", "Operands": ["ST(3)"] }] D9C4;[{ "Type": "Fld", "Operands": ["ST(4)"] }] D9C5;[{ "Type": "Fld", "Operands": ["ST(5)"] }] D9C6;[{ "Type": "Fld", "Operands": ["ST(6)"] }] D9C7;[{ "Type": "Fld", "Operands": ["ST(7)"] }] # Memory operands D9042510000000;[{ "Type": "Fld", "Operands": ["dword ptr [0x10]"] }] DD042510000000;[{ "Type": "Fld", "Operands": ["qword ptr [0x10]"] }] DB2C25;[{ "Type": "Fld", "Operands": ["tbyte ptr [eax]"] }] D90425;[{ "Type": "Fld", "Operands": ["dword ptr [eax]"] }] DD0425;[{ "Type": "Fld", "Operands": ["qword ptr [eax]"] }] # Floating Point instruction tests (continued) # Format: RawBytes;Instructions RawBytes;Instructions # FST - Store floating point value D9D0;[{ "Type": "Fst", "Operands": ["ST(0)"] }] D9D1;[{ "Type": "Fst", "Operands": ["ST(1)"] }] D9D2;[{ "Type": "Fst", "Operands": ["ST(2)"] }] D9D3;[{ "Type": "Fst", "Operands": ["ST(3)"] }] D9D4;[{ "Type": "Fst", "Operands": ["ST(4)"] }] D9D5;[{ "Type": "Fst", "Operands": ["ST(5)"] }] D9D6;[{ "Type": "Fst", "Operands": ["ST(6)"] }] D9D7;[{ "Type": "Fst", "Operands": ["ST(7)"] }] # Memory operands D9142510000000;[{ "Type": "Fst", "Operands": ["dword ptr [0x10]"] }] DD142510000000;[{ "Type": "Fst", "Operands": ["qword ptr [0x10]"] }] D91425;[{ "Type": "Fst", "Operands": ["dword ptr [eax]"] }] DD1425;[{ "Type": "Fst", "Operands": ["qword ptr [eax]"] }] # FSTP - Store floating point value and pop D9D8;[{ "Type": "Fstp", "Operands": ["ST(0)"] }] D9D9;[{ "Type": "Fstp", "Operands": ["ST(1)"] }] D9DA;[{ "Type": "Fstp", "Operands": ["ST(2)"] }] D9DB;[{ "Type": "Fstp", "Operands": ["ST(3)"] }] D9DC;[{ "Type": "Fstp", "Operands": ["ST(4)"] }] D9DD;[{ "Type": "Fstp", "Operands": ["ST(5)"] }] D9DE;[{ "Type": "Fstp", "Operands": ["ST(6)"] }] D9DF;[{ "Type": "Fstp", "Operands": ["ST(7)"] }] # Memory operands D91C2510000000;[{ "Type": "Fstp", "Operands": ["dword ptr [0x10]"] }] DD1C2510000000;[{ "Type": "Fstp", "Operands": ["qword ptr [0x10]"] }] DB3C25;[{ "Type": "Fstp", "Operands": ["tbyte ptr [eax]"] }] D91C25;[{ "Type": "Fstp", "Operands": ["dword ptr [eax]"] }] DD1C25;[{ "Type": "Fstp", "Operands": ["qword ptr [eax]"] }] # FCOM - Compare floating point values D8D0;[{ "Type": "Fcom", "Operands": ["ST(0)"] }] D8D1;[{ "Type": "Fcom", "Operands": ["ST(1)"] }] D8D2;[{ "Type": "Fcom", "Operands": ["ST(2)"] }] D8D3;[{ "Type": "Fcom", "Operands": ["ST(3)"] }] D8D4;[{ "Type": "Fcom", "Operands": ["ST(4)"] }] D8D5;[{ "Type": "Fcom", "Operands": ["ST(5)"] }] D8D6;[{ "Type": "Fcom", "Operands": ["ST(6)"] }] D8D7;[{ "Type": "Fcom", "Operands": ["ST(7)"] }] # Memory operands D8142510000000;[{ "Type": "Fcom", "Operands": ["dword ptr [0x10]"] }] DC142510000000;[{ "Type": "Fcom", "Operands": ["qword ptr [0x10]"] }] D81425;[{ "Type": "Fcom", "Operands": ["dword ptr [eax]"] }] DC1425;[{ "Type": "Fcom", "Operands": ["qword ptr [eax]"] }] # FCOMP - Compare floating point values and pop D8D8;[{ "Type": "Fcomp", "Operands": ["ST(0)"] }] D8D9;[{ "Type": "Fcomp", "Operands": ["ST(1)"] }] D8DA;[{ "Type": "Fcomp", "Operands": ["ST(2)"] }] D8DB;[{ "Type": "Fcomp", "Operands": ["ST(3)"] }] D8DC;[{ "Type": "Fcomp", "Operands": ["ST(4)"] }] D8DD;[{ "Type": "Fcomp", "Operands": ["ST(5)"] }] D8DE;[{ "Type": "Fcomp", "Operands": ["ST(6)"] }] D8DF;[{ "Type": "Fcomp", "Operands": ["ST(7)"] }] # Memory operands D81C2510000000;[{ "Type": "Fcomp", "Operands": ["dword ptr [0x10]"] }] DC1C2510000000;[{ "Type": "Fcomp", "Operands": ["qword ptr [0x10]"] }] D81C25;[{ "Type": "Fcomp", "Operands": ["dword ptr [eax]"] }] DC1C25;[{ "Type": "Fcomp", "Operands": ["qword ptr [eax]"] }] # FCOMPP - Compare floating point values and pop twice DED9;[{ "Type": "Fcompp", "Operands": [] }] # FCHS - Change sign of floating point value D9E0;[{ "Type": "Fchs", "Operands": [] }] # FABS - Absolute value of floating point value D9E1;[{ "Type": "Fabs", "Operands": [] }] # FTST - Test floating point value D9E4;[{ "Type": "Ftst", "Operands": [] }] # FXAM - Examine floating point value D9E5;[{ "Type": "Fxam", "Operands": [] }] # FINIT - Initialize FPU (with FWAIT prefix) 9BDBE3;[{ "Type": "Finit", "Operands": [] }] # FNINIT - Initialize FPU without checking for pending unmasked exceptions DBE3;[{ "Type": "Fninit", "Operands": [] }] # FNSTSW AX - Store FPU status word in AX without checking for pending unmasked exceptions DFE0;[{ "Type": "Fnstsw", "Operands": ["ax"] }] # FSTSW AX - Store FPU status word in AX 9BDFE0;[{ "Type": "Fstsw", "Operands": ["ax"] }]