
Chapter 3
Software Environment
85
23542A/0—September 2000
AMD-K6-2E+ Embedded Processor Data Sheet
Preliminary Information
FSQRT (extended precision)
FST mem32real
FST mem64real
FST ST(i)
1
FSTCW
FSTENV
FSTP mem32real
FSTP mem64real
FSTP mem80real
FSTP ST(i)
1
FSTSW AX
FSTSW mem16
FSUB ST(0), mem32real
FSUB ST(0), mem64real
FSUB ST(0), ST(i)
1
FSUB ST(i), ST(0)
1
FSUBP ST(0), ST(i)
1
FSUBR ST(0), mem32real
FSUBR ST(0), mem64real
FSUBR ST(0), ST(i)
1
FSUBR ST(i), ST(0)
1
FSUBRP ST(i), ST(0)
1
FTST
FUCOM
FUCOMP
FUCOMPP
FXAM
FXCH
FXTRACT
FYL2X
FYL2XP1
FWAIT
D9h
D9h
DDh
FAh
short
short
short
float
fstore
fstore
mm-010-xxx
mm-010-xxx
DDh
11-010-xxx
short
fstore
D9h
D9h
D9h
DDh
D9h
mm-111-xxx
mm-110-xxx
mm-011-xxx
mm-011-xxx
mm-111-xxx
vector
vector
short
short
vector
fstore
fstore
DDh
11-011-xxx
short
float
DFh
DDh
D8h
DCh
E0h
vector
vector
short
short
mm-111-xxx
mm-100-xxx
mm-100-xxx
fload, float
fload, float
D8h
11-100-xxx
short
float
DCh
11-101-xxx
short
float
DEh
11-101-xxx
short
float
D8h
DCh
mm-101-xxx
mm-101-xxx
short
short
fload, float
fload, float
D8h
11-100-xxx
short
float
DCh
11-101-xxx
short
float
DEh
11-100-xxx
short
float
D9h
DDh
DDh
DAh
D9h
D9h
D9h
D9h
D9h
9Bh
E4h
short
short
short
short
short
short
vector
short
short
vector
float
float
float
float
float
float
11-100-xxx
11-101-xxx
E9h
E5h
11-001-xxx
F4h
F1h
F9h
float
float
Notes:
1.
The last three bits of the modR/M byte select the stack entry ST(i).
Table 13. Floating-Point Instructions (continued)
Instruction Mnemonic
First
Byte
Second
Byte
ModR/M
Byte
Decode
Type
RISC86
Operations