UMBC | CMSC 313 -- Floating-Point Instructions | Previous | Next |
foperation zero or more operands
fboperation operand ;BCD operand fioperation operand ;Integer operand
If the last letter is a 'p', the FPU stack is popped on completion of the operation.
foperationp zero or more operands
FLD | Load floating-point value |
FST | Store floating-point value |
FSTP | Store floating-point value and pop |
FILD | Load integer |
FIST | Store integer |
FISTP | Store integer and pop |
FBLD | Load BCD |
FBSTP | Store BCD and pop |
FXCH | Exchange registers |
FCMOVE | Floating-point conditional move if equal |
FCMOVNE | Floating-point conditional move if not equal |
FCMOVB | Floating-point conditional move if below |
FCMOVBE | Floating-point conditional move if below and equal |
FCMOVNB | Floating-point conditional move if not below |
FCMOVNBE | Floating-point conditional move if not below or equal |
FCMOVU | Floating-point conditional move if unordered |
FCMOVNU | Floating-point conditional move if not unordered |
FADD | Add floating-point |
FADDP | Add floating-point and pop |
FIADD | Add integer |
FSUB | Subtract floating-point |
FSUBP | Subtract floating-point and pop |
FISUB | Subtract integer |
FSUBR | Subtract floating-point reverse |
FSUBRP | Subtract floating-point reverse and pop |
FISUBR | Subtract integer reverse |
FMUL | Multiply floating-point |
FMULP | Multiply floating-point and pop |
FIMUL | Multiply integer |
FDIV | Divide floating-point |
FDIVP | Divide floating-point and pop |
FIDIV | Divide integer |
FDIVR | Divide floating-point reverse |
FDIVRP | Divide floating-point reverse and pop |
FIDIVR | Divide integer reverse |
FPREM | Partial remainder |
FPREM1 | IEEE Partial remainder |
FABS | Absolute value |
FCHS | Change sign |
FRNDINT | Round to integer |
FSCALE | Scale by power of two |
FSQRT | Square root |
FXTRACT | Extract exponent and significand |
FCOM | Compare floating-point |
FCOMP | Compare floating-point and pop |
FCOMPP | Compare floating-point and pop |
FUCOM | Unordered compare floating-point |
FUCOMP | Unordered compare floating-point and pop |
FICOMPP | 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 | Exam floating-point |
FSIN | Sine |
FCOS | Cosine |
FSINCOS | Sine and cosine |
FPTAN | Partial tangent |
FPATAN | Partial arctangent |
F2XM1 | 2x - 1 |
FYL2X | y*log2x |
FYL2XP1 | y*log2(x+1) |
FLD1 | Load +1.0 |
FLDZ | Load +0.0 |
FLDPI | Load (the value of pi) |
FLDL2E | Load log2e |
FLDLN2 | Load loge2 |
FLDL2T | Load log2>10 |
FLDLG2 | Load log102 |
FINCSTP | Increment FPU register stack pointer |
FDECSTP | Decrement FPU register stack pointer |
FFREE | Free floating-point register |
FINIT | Initialize FPU after checking error conditions |
FNINIT | Initialize FPU without checking error conditions |
FCLEX | Clear floating-point without exception flags after checking for error conditions |
FNCLEX | Clear floating-point without exception flags without checking for error conditions |
FSTCW | Store FPU control word after checking error conditions |
FNSTCW | Store FPU control word without checking error conditions |
FLDCW | Load FPU contgrol word |
FSTENV | Store FPU environment after checking error conditions |
FNSTENV | Store FPU environment without checking error conditions |
FLDENV | Load FU environment |
FSAVE | Save FPU state after checking error conditions |
FNSAVE | Save FPU state without checking error conditions |
FRSTOR | Restore FPU state |
FSTSW | Store FPU status word after checking error conditions |
FNSTSW | Store FPU status word withou checking error conditions |
WAIT/FWAIT | Wait for FPU |
FNOP | FPU no operation |