AMD AMD-K6-2/500AFX Data Sheet - Page 94
Table 15., Floating-Point Instructions, FDIV STi, ST0 single precision
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AMD-K6®-2 Processor Data Sheet Preliminary Information 21850J/0-February 2000 Table 15. Floating-Point Instructions Instruction Mnemonic First Second ModR/M Decode Byte Byte Byte Type RISC86 Operations Note F2XM1 D9h F0h short float FABS D9h F1h short float FADD ST(0), ST(i) D8h 11-000-xxx short float * FADD ST(0), mem32real D8h mm-000-xxx short fload, float FADD ST(i), ST(0) DCh 11-000-xxx short float * FADD ST(0), mem64real DCh mm-000-xxx short fload, float FADDP ST(i), ST(0) DEh 11-000-xxx short float * FBLD DFh mm-100-xxx vector FBSTP DFh mm-110-xxx vector FCHS D9h E0h short float FCLEX DBh E2h vector FCOM ST(0), ST(i) D8h 11-010-xxx short float * FCOM ST(0), mem32real D8h mm-010-xxx short fload, float FCOM ST(0), mem64real DCh mm-010-xxx short fload, float FCOMP ST(0), ST(i) D8h 11-011-xxx short float * FCOMP ST(0), mem32real D8h mm-011-xxx short fload, float FCOMP ST(0), mem64real DCh mm-011-xxx short fload, float FCOMPP DEh D9h 11-011-001 short float FCOS D9h FFh short float FDECSTP D9h F6h short float FDIV ST(0), ST(i) (single precision) D8h 11-110-xxx short float * FDIV ST(0), ST(i) (double precision) D8h 11-110-xxx short float * FDIV ST(0), ST(i) (extended precision) D8h 11-110-xxx short float * FDIV ST(i), ST(0) (single precision) DCh 11-111-xxx short float * FDIV ST(i), ST(0) (double precision) DCh 11-111-xxx short float * FDIV ST(i), ST(0) (extended precision) DCh 11-111-xxx short float * FDIV ST(0), mem32real D8h mm-110-xxx short fload, float FDIV ST(0), mem64real DCh mm-110-xxx short fload, float FDIVP ST(0), ST(i) DEh 11-111-xxx short float * FDIVR ST(0), ST(i) D8h 11-110-xxx short float * FDIVR ST(i), ST(0) DCh 11-111-xxx short float * Note: * The last three bits of the modR/M byte select the stack entry ST(i). 74 Software Environment Chapter 3