6.10 Intel CPU Level Float Functions (Instructions)

Table Transcendental or related functions

Instruction	Description
FCOS	Cosine of ST(0)
FLDL2E	Load log2(ε) into ST(0)
FLDL2T	Load log2(10) into ST(0)
FLDLG2	Load log10(2) into ST(0)
FLDLN2	Load logε(2) into ST(0)
FLDPI	Load π into ST(0)
FPATAN	Partial Arctangent
FPTAN	Partial Tangent
FSIN	Sine
FSINCOS	Sine and Cosine
FSQRT	Square Root
FYL2X	ST(1) × log2(ST(0))
FYL2XP1	ST(1) × log2(ST(0) + 1.0)

Table All Intel Floating Point Instruction Set

Instruction	Description
F2XM1	Compute 2ST(0) - 1
FABS	Absolute Value
FADD	Add
FADDP	Add and Pop
FBLD	Load Binary Coded Decimal
FBSTP	Store Binary Coded Decimal and Pop
FCHS	Change Sign
FCLEX	Clear Exceptions
FCOM	Compare Real
FCOMP	Compare Real and Pop
FCOMPP	Compare Real and Pop Twice
FCOMIP	Compare Real, Set EFLAGS, and Pop
FCOS	Cosine of ST(0)
FDECSTP	Decrement Stack-Top Pointer
FDIV	Divide
FDIVP	Divide and Pop
FDIVR	Reverse Divide
FDIVRP	Reverse Divide and Pop
FFREE	Free ST(i) Register
FIADD	Add Integer
FICOM	Compare Integer
FICOMP	Compare Integer and Pop
FIDIV	Divide
FIDIVR	Reverse Divide
FILD	Load Integer
FIMUL	Multiply
FINCSTP	Increment Stack Pointer
FINIT	Initialize Floating-Point Unit
FIST	Store Integer
FISTP	Store Integer and Pop
FISUB	Subtract
FISUBR	Reverse Subtract
FLD	Load Real
FLD1	Load +1.0 into ST(0)
FLDCW	Load Control Word
FLDENV	Load FPU Environment
FLDL2E	Load log2(ε) into ST(0)
FLDL2T	Load log2(10) into ST(0)
FLDLG2	Load log10(2) into ST(0)
FLDLN2	Load logε(2) into ST(0)
FLDPI	Load π into ST(0)
FLDZ	Load +0.0 into ST(0)
FMUL	Multiply
FMULP	Multiply
FNOP	No Operation
FPATAN	Partial Arctangent
FPREM	Partial Remainder
FPREM1	Partial Remainder (IEEE)
FPTAN	Partial Tangent
FRNDINT	Round to Integer
FRSTOR	Restore FPU State
FSAVE	Store FPU State
FSCALE	Scale
FSIN	Sine
FSINCOS	Sine and Cosine
FSQRT	Square Root
FST	Store Real
FSTCW	Store Control Word
FSTENV	Store FPU Environment
FSTP	Store Real and Pop
FSTSW	Store Status Word into AX
FSTSW	Store Status Word into Memory
FSUB	Subtract
FSUBP	Subtract and Pop
FSUBR	Reverse Subtract
FSUBRP	Reverse Subtract and Pop
FTST	Test
FUCOM	Unordered Compare Real
FUCOMP	Unordered Compare Real and Pop
FUCOMPP	Unordered Compare Real and Pop Twice
FUCOMI	Unorderd Compare Real and Set EFLAGS
FUCOMIP	Unorderd Compare Real, Set EFLAGS, and Pop
FXAM	Examine
FXCH	Exchange ST(0) and ST(i)
FXTRACT	Extract Exponent and Significand
FYL2X	ST(1) × log2(ST(0))
FYL2XP1	ST(1) × log2(ST(0) + 1.0)
FWAIT	Wait until FPU Ready