?????????? ????????? Intel

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?????????? ????????? Intel XScale. ??????????
??????????? ??????????

• ??????? ?????
• Intel
• Vasily.Basov_at_intel.com

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• ?????????? XScale - ????? ???????
• XScale - ????? ???????????
• ??????????? ??????
• Top5 ??????? ?? ???????????
• ??????????? ????????????
• ????? ??????????
• Intel ???????????, ??????????, VTune
• ?????? ??? ?????????????
• ????????? ????????? ????????????? ?? Intel

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????? ??? ??????????? XScale
Bulverde Applications Processors
Bulverde Applications Processors
Performance
Premium
PDAs
Phones
Value
Budget
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?????? ??????? ??????????? ??? ???
2003
2004
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?????? ??????? ??????????? ??? ??????????
2004
2003
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• ?????????? XScale - ????? ???????
• XScale - ????? ???????????
• ??????????? ??????
• Top5 ??????? ?? ???????????
• ??????????? ????????????
• ????? ??????????
• Intel ???????????, ??????????, VTune
• ?????? ??? ?????????????
• ????????? ????????? ????????????? ?? Intel

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??????????? XScale
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XScale vs. P4
Feature Pentium(r) 4 Processor (Prescott) XScale (Bulverde)
Architecture 25 stage OOO 7 stage in-order
Frequency 3.2 GHz 400MHz (520MHz)
L1 Data Cache 8KByte (16 KByte) 32KByte2KB
L1 Instruction Cache 12k uops 32KByte
L1 Cache Control prefetch prefetch, lock, line flush
L2 Cache 512 KByte (1MByte) -
BTB control - lock, flush
SIMD instructions MMX, SSE, SSE2 (PNI) 5 MPT (43 Wireless MMX)
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Intel Media Processing Technology

• ?????????/???????????? ? 40-?????? ???????????
• ??????????? ?? CP0

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Intel Wireless MMX Technology

• 16 SIMD ?????????
• ???????? ?????????? ???? ??????????

WADDBUSNE wr0, wr1, wr2
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????? ??????????
?????? ???????????? ? ???????? ????? ????????
?????????????? ????? ???????? ??????????.
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?????????? Intel C

• Intel ?????????????
• ??????????? Plug Play
• ?????? ?????????? ? Platform Builder for
  Microsoft Windows CE ? eMbedded Visual C

???????????? ????? ????????????? Intel and
Microsoft ??? ????????? ????????? ????
?????? ???????????? ? ???????? ????? ????????
?????????????? ????? ???????? ??????????.
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Inline ?????????
Inline ASM
int get_leading_zeroes (int i) int count
__asm clz r0,r0 ... return
count
?????????? ????????????? ???????????
?????????? ASM
?????????? C/C
??? ??????????
?????????
???????? ???
???????????????? Intel XScale
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?????????? (intrinsic) ???????
int count_leading_zeros(int i) int temp1,
temp2 temp2 i if (temp2 0) temp1
32 else temp1 0 while ( temp2 gt 0
) temp2 ltlt 1 temp1
1 return temp1
Intrinsic ???????
?????????? ???????? intrinsic ???????
??????????????-??? ???????????? ?????
?????????? C/C
??? ??????????
int get_leading_zeros(int i) int count
count _CountLeadingZeros(i) return count
?????????
???????? ???
???????????????? Intel XScale
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VTune Performance Analyzer
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VTune Performance Analyzer
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Top5 ???????? ???????

• ??????????? ?????????? Intel!
• ?????e run-time ??????????
• ???????????? ? ???????????
• ???????? ???????????!
• ??????????? VTune ??? ??????? ??????????????????
  ? ?????? ????? ????!
• ????????????? ????????????? ????!
• ???-?????? ????? 150 ?????? (gt500 if a TLB miss)
• ??????????? preload() (works on ARM, too)
• Advanced XScale ????? ?????????????? mini
  cache ? ????????? ???????????? ?????? ? ????
• ?????? ??????????? ??????????? ????
• ??????????? DSP-??????????, iMPT, WMMX
• ????????????? ?????????
• ????????????? ?????
• ??????????? ???????????????? IPP/GPP ??????????
• 0. ???????? ?????? ????? ??? ??? ????????
  ???????????

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