Instruction Dispatch and Execution Resources
215
22007E/0—November 1999
AMD Athlon™ Processor x86 Code Optimization
FLDCW [mem16]
D9h
mm-101-xxx VectorPath
FLDENV [mem14byte]
D9h
mm-100-xxx VectorPath
FLDENV [mem28byte]
D9h
mm-100-xxx VectorPath
FLDL2E
D9h
EAh
DirectPath
FSTORE
FLDL2T
D9h
E9h
DirectPath
FSTORE
FLDLG2
D9h
ECh
DirectPath
FSTORE
FLDLN2
D9h
EDh
DirectPath
FSTORE
FLDPI
D9h
EBh
DirectPath
FSTORE
FLDZ
D9h
EEh
DirectPath
FSTORE
FMUL ST, ST(i)
D8h
11-001-xxx
DirectPath
FMUL
1
FMUL ST(i), ST
DCh
11-001-xxx
DirectPath
FMUL
1
FMUL [mem32real]
D8h
mm-001-xxx DirectPath
FMUL
FMUL [mem64real]
DCh
mm-001-xxx DirectPath
FMUL
FMULP ST, ST(i)
DEh
11-001-xxx
DirectPath
FMUL
1
FNOP
D9h
D0h
DirectPath
FADD/FMUL/FSTORE
FPTAN
D9h
F2h
VectorPath
FPATAN
D9h
F3h
VectorPath
FPREM
D9h
F8h
DirectPath
FMUL
FPREM1
D9h
F5h
DirectPath
FMUL
FRNDINT
D9h
FCh
VectorPath
FRSTOR [mem94byte]
DDh
mm-100-xxx VectorPath
FRSTOR [mem108byte]
DDh
mm-100-xxx VectorPath
FSAVE [mem94byte]
DDh
mm-110-xxx VectorPath
FSAVE [mem108byte]
DDh
mm-110-xxx VectorPath
FSCALE
D9h
FDh
VectorPath
FSIN
D9h
FEh
VectorPath
FSINCOS
D9h
FBh
VectorPath
FSQRT
D9h
FAh
DirectPath
FMUL
FST [mem32real]
D9h
mm-010-xxx DirectPath
FSTORE
FST [mem64real]
DDh
mm-010-xxx DirectPath
FSTORE
FST ST(i)
DDh
11-010xxx
DirectPath
FADD/FMUL
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...