Intel XScale'

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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
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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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