216
Instruction Dispatch and Execution Resources
AMD Athlon™ Processor x86 Code Optimization
22007E/0—November 1999
FSTCW [mem16]
D9h
mm-111-xxx VectorPath
FSTENV [mem14byte]
D9h
mm-110-xxx VectorPath
FSTENV [mem28byte]
D9h
mm-110-xxx VectorPath
FSTP [mem32real]
D9h
mm-011-xxx DirectPath
FADD/FMUL
FSTP [mem64real]
DDh
mm-011-xxx DirectPath
FADD/FMUL
FSTP [mem80real]
D9h
mm-111-xxx VectorPath
FSTP ST(i)
DDh
11-011-xxx
DirectPath
FADD/FMUL
FSTSW AX
DFh
E0h
VectorPath
FSTSW [mem16]
DDh
mm-111-xxx VectorPath
FSTORE
FSUB [mem32real]
D8h
mm-100-xxx DirectPath
FADD
FSUB [mem64real]
DCh
mm-100-xxx DirectPath
FADD
FSUB ST, ST(i)
D8h
11-100-xxx
DirectPath
FADD
1
FSUB ST(i), ST
DCh
11-101-xxx
DirectPath
FADD
1
FSUBP ST, ST(i)
DEh
11-101-xxx
DirectPath
FADD
1
FSUBR [mem32real]
D8h
mm-101-xxx DirectPath
FADD
FSUBR [mem64real]
DCh
mm-101-xxx DirectPath
FADD
FSUBR ST, ST(i)
D8h
11-100-xxx
DirectPath
FADD
1
FSUBR ST(i), ST
DCh
11-101-xxx
DirectPath
FADD
1
FSUBRP ST(i), ST
DEh
11-100-xxx
DirectPath
FADD
1
FTST
D9h
E4h
DirectPath
FADD
FUCOM
DDh
11-100-xxx
DirectPath
FADD
FUCOMI ST, ST(i)
DB
E8-EFh
VectorPath
FADD
FUCOMIP ST, ST(i)
DF
E8-EFh
VectorPath
FADD
FUCOMP
DDh
11-101-xxx
DirectPath
FADD
FUCOMPP
DAh
E9h
DirectPath
FADD
FWAIT
9Bh
DirectPath
FXAM
D9h
E5h
VectorPath
FXCH
D9h
11-001-xxx
DirectPath
FADD/FMUL/FSTORE
FXTRACT
D9h
F4h
VectorPath
FYL2X
D9h
F1h
VectorPath
FYL2XP1
D9h
F9h
VectorPath
Table 22. Floating-Point Instructions (Continued)
Instruction Mnemonic
First
Byte
Second
Byte
ModR/M
Byte
Decode
Type
FPU
Pipe(s)
Note
Notes:
1. The last three bits of the modR/M byte select the stack entry ST(i).
Summary of Contents for Athlon Processor x86
Page 1: ...AMD Athlon Processor x86 Code Optimization Guide TM...
Page 12: ...xii List of Figures AMD Athlon Processor x86 Code Optimization 22007E 0 November 1999...
Page 16: ...xvi Revision History AMD Athlon Processor x86 Code Optimization 22007E 0 November 1999...
Page 202: ...186 Page Attribute Table PAT AMD Athlon Processor x86 Code Optimization 22007E 0 November 1999...
Page 252: ...236 VectorPath Instructions AMD Athlon Processor x86 Code Optimization 22007E 0 November 1999...
Page 256: ...240 Index AMD Athlon Processor x86 Code Optimization 22007E 0 November 1999...