AMD AMD-K6-2/500AFX Data Sheet - Page 97
Fsub St0, Sti
View all AMD AMD-K6-2/500AFX manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 97 highlights
21850J/0-February 2000 Preliminary Information AMD-K6®-2 Processor Data Sheet Table 15. Floating-Point Instructions (continued) Instruction Mnemonic First Second ModR/M Decode Byte Byte Byte Type RISC86 Operations Note FST mem32real D9h mm-010-xxx short fstore FST mem64real DDh mm-010-xxx short fstore FST ST(i) DDh 11-010-xxx short fstore * FSTCW D9h mm-111-xxx vector FSTENV D9h mm-110-xxx vector FSTP mem32real D9h mm-011-xxx short fstore FSTP mem64real DDh mm-011-xxx short fstore FSTP mem80real D9h mm-111-xxx vector FSTP ST(i) DDh 11-011-xxx short float * FSTSW AX DFh E0h vector FSTSW mem16 DDh mm-111-xxx vector FSUB ST(0), mem32real D8h mm-100-xxx short fload, float FSUB ST(0), mem64real DCh mm-100-xxx short fload, float FSUB ST(0), ST(i) D8h 11-100-xxx short float * FSUB ST(i), ST(0) DCh 11-101-xxx short float * FSUBP ST(0), ST(i) DEh 11-101-xxx short float * FSUBR ST(0), mem32real D8h mm-101-xxx short fload, float FSUBR ST(0), mem64real DCh mm-101-xxx short fload, float FSUBR ST(0), ST(i) D8h 11-100-xxx short float * FSUBR ST(i), ST(0) DCh 11-101-xxx short float * FSUBRP ST(i), ST(0) DEh 11-100-xxx short float * FTST D9h E4h short float FUCOM DDh 11-100-xxx short float FUCOMP DDh 11-101-xxx short float FUCOMPP DAh E9h short float FXAM D9h E5h short float FXCH D9h 11-001-xxx short float FXTRACT D9h F4h vector FYL2X D9h F1h short float FYL2XP1 D9h F9h short float FWAIT 9Bh vector Note: * The last three bits of the modR/M byte select the stack entry ST(i). Chapter 3 Software Environment 77