AMD-K6 Datasheet, PDF (89/346 Pages) Advanced Micro Devices – AMD-K6 Processor

20695H/0—March 1998
Preliminary Information
AMD-K6^® Processor Data Sheet
Table 11. Floating-Point Instructions (continued)
Instruction Mnemonic
First Second ModR/M Decode
Byte Byte
Byte
Type
RISC86^®
Opcodes
Note
FRSTOR
DDh
mm-100-xxx vector
FSAVE
DDh
mm-110-xxx vector
FSCALE
D9h FDh
short float
FSIN
D9h FEh
short float
FSINCOS
D9h FBh
vector
FSQRT (single precision)
D9h FAh
short float
FSQRT (double precision)
D9h FAh
short float
FSQRT (extended precision)
D9h FAh
short float
FST mem32real
D9h
mm-010-xxx short fstore
FST mem64real
DDh
mm-010-xxx short fstore
FST ST(i)
DDh
11-010xxx 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
Note:
* The last three bits of the modR/M byte select the stack entry ST(i).
Chapter 3
Software Environment
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