X86组合语言/浮点运算指令集

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基本算术指令（Basic arithmetic instructions）

• FADD/FADDP：Add floating point
• FIADD：Add integer to floating point
• FSUB/FSUBP：Subtract floating point
• FISUB：Subtract integer from floating point
• FSUBR/FSUBRP：Reverse subtract floating point
• FISUBR：Reverse subtract floating point from integer
• FMUL/FMULP：Multiply floating point
• FIMUL：Multiply integer by floating point
• FDIV/FDIVP：Divide floating point
• FIDIV：Divide floating point by integer
• FDIVR/FDIVRP：Reverse divide
• FIDIVR：Reverse divide integer by floating point
• FABS：Absolute value
• FCHS：Change sign Instruction Mnemonic Status Flag States Condition Description
• FCMOVBE：CF=1 or ZF=1 Below or equal
• FCMOVNBE：CF=0 or ZF=0 Not below nor equal
• FCMOVU：PF=1 Unordered
• FCMOVNU：PF=0 Not unordered
• FSQRT：Square root
• FPREM：Partial remainder
• FPREM1：IEEE partial remainder
• FRNDINT：Round to integral value
• FXTRACT：Extract exponent and significan

常数载入指令（Load constant instructions）

• FLDZ：Load +0.0
• FLD1：Load +1.0
• FLDPI：Load π
• FLDL2T：Load log2 10
• FLDL2E：Load log2e
• FLDLG2：Load log102
• FLDLN2：Load loge