Intel 64 and IA-32 Architectures Software Developers Manual Volume 1, Basic Architecture

5-12 Vol. 1
INSTRUCTION SET SUMMARY
5.2.3 x87 FPU Comparison Instructions
The compare instructions examine or compare floating-point or integer operands.
FCOM Compare floating-point
FCOMP Compare floating-point and pop
FCOMPP Compare floating-point and pop twice
FUCOM Unordered compare floating-point
FUCOMP Unordered compare floating-point and pop
FUCOMPP Unordered compare floating-point and pop twice
FICOM Compare integer
FICOMP Compare integer and pop
FCOMI Compare floating-point and set EFLAGS
FUCOMI Unordered compare floating-point and set EFLAGS
FCOMIP Compare floating-point, set EFLAGS, and pop
FUCOMIP Unordered compare floating-point, set EFLAGS, and pop
FTST Test floating-point (compare with 0.0)
FXAM Examine floating-point
5.2.4 x87 FPU Transcendental Instructions
The transcendental instructions perform basic trigonometric and logarithmic opera-
tions on floating-point operands.
FSIN Sine
FCOS Cosine
FSINCOS Sine and cosine
FPTAN Partial tangent
FPATAN Partial arctangent
F2XM1 2
x
− 1
FYL2X y∗log
2
x
FYL2XP1 y∗log
2
(x+1)
5.2.5 x87 FPU Load Constants Instructions
The load constants instructions load common constants, such as π, into the x87
floating-point registers.
FLD1 Load +1.0
FLDZ Load +0.0
FLDPI Load π
FLDL2E Load log
2
e