AMD-K6 Datasheet, PDF (86/346 Pages) Advanced Micro Devices – AMD-K6 Processor

AMD-K6^® Processor Data Sheet
Preliminary Information
20695H/0—March 1998
Table 10. Integer Instructions (continued)
Instruction Mnemonic
XOR mem16/32, imm16/32
XOR mreg16/32, imm8 (signed ext.)
XOR mem16/32, imm8 (signed ext.)
First Second ModR/M Decode
Byte Byte
Byte
Type
RISC86^®
Opcodes
81h
mm-110-xxx long load, alu, store
83h
11-110-xxx short alux
83h
mm-110-xxx long load, alux, store
Table 11. Floating-Point Instructions
Instruction Mnemonic
First Second ModR/M Decode
Byte Byte
Byte
Type
RISC86^®
Opcodes
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
11-011-001 short float
FCOS ST(0)
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
*
Note:
* The last three bits of the modR/M byte select the stack entry ST(i).
68
Software Environment
Chapter 3