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[ AMD headquarters, Sunnyvale, California [1] Advanced Micro Devices, Inc. or AMD,

an American multinational semiconductor company based in Sunnyvale, California, and behind Intel the second-largest global supplier of microprocessors based on the x86 architecture and also one of the largest suppliers of graphics processing units [2] . In 2003, AMD launched the Athlon 64 (Hammer, AMD64, K8) and pioneered the x86-64 instruction set. Until Intel introduced the Core 2 microarchitecture in 2006, AMD64 was the dominating architecture for computer chess in the 2000s. With the Zen micro-architecture and the release of the Ryzen processor in early 2017, it seems that AMD can recover lost ground. However, early Ryzens prior to Zen 3 micro-architecture released in November 2020 have problems with BMI2 performance [3] [4] , in particular using BMI2 PEXT in chess programs - one should conditionally compile using magic bitboards instead of PEXT bitboards, otherwise preferable for compatible Intel processors [5] .

Sponsoring#

• WMCCC 1997
• BELCT 2001

Photos#

Christophe Jolly and Walter Bannerman, Paris WMCCC 1997 [6]

Rebel vs Viswanathan Anand, Ischia, July 1998 - back of Ed Schröder and Jeroen Noomen [7] [8]

Jochen Peussner and Roland Pfister, BELCT 2001 [9]

x86 Architectures#

[10]

| Year | Architecture

SIMD Extensions#

• AVX (since Bulldozer)
• AVX2 (since Excavator)
• MMX
• 3DNow!
• SSE
• SSE2
• SSE3
• SSE4
• SSE5 (not implemented)
• XOP (Bulldozer only)

General Purpose Extensions#

• BMI
• BMI2 (Zen) [11]
• TBM

See also#

• Intel
• Microsoft

Forum Posts#

2010 …#

• Intel vs AMD: which does your engine prefer? by Albert Silver, CCC, November 04, 2011 » Intel
• What is your take on AMD’s new processor? by Tano-Urayoan Russi Roman, CCC, October 24, 2012

2015 …#

• AMD’s Ryzen launches March 2, outperforming Intel’s Core i7 by Leo Anger, CCC, February 22, 2017 [12]
• New AMD processors by Ingo Althöfer, The Computer-go Archives, March 03, 2017
• Ryzen Fritz Chess Benchmarks ? by ralunger, Rybka Forum, March 03, 2017
• Is anyone here already using a Ryzen 1800X processor ? by Aloisio Ponti, CCC, March 26, 2017
• Re: Komodo 11.3 by Mark Lefler, CCC, March 04, 2018 » BMI2 PEXT, Komodo 11.3
• Ryzen 2 and BMI2? by Steve Maughan, CCC, May 13, 2018 » BMI2

Re: Ryzen 2 and BMI2? by Joost Buijs, CCC, May 18, 2020 » AVX2, BMI2

• Porting Stockfish to GCN on APUs…? by Nick Pelling, FishCooking, November 18, 2018 » Stockfish [13] [14]
• AMD BMI2 question by Leo, CCC, March 10, 2019 » BMI2
• Ryzen problems - AGAIN! by noobpwnftw, CCC, October 22, 2019
• PEXT/PDEP are even slower than you think on Zen by Gian-Carlo Pascutto, CCC, December 09, 2019 » BMI2 PEXT

2020 …#

• AMD’s X3D - HBM on CPU - memory wall by Srdja Matovic, CCC, March 08, 2020
• Re: Ryzen 2 and BMI2? by Joost Buijs, CCC, May 18, 2020 » AVX2, BMI2
• Re: AMD Announces a Red October: Zen 3 on October 8, RDNA2 on October 28 by dragontamer5788, TechPowerUp Forum, September 9, 2020 » BMI2 PEXT
• New AMD Zen 3 and Ryzen processors by mmt, CCC, October 09, 2020
• Will AMD RDNA2 based Radeon RX 6000 series kick butt with Lc0? by Srdja Matovic, CCC, November 01, 2020 » GPU
• Zen3 supports fast PEXT aka BMI2 by Alayan Feh, CCC, November 05, 2020 » BMI2 PEXT

External Links#

• Advanced Micro Devices from Wikipedia
• List of AMD CPU microarchitectures from Wikipedia
• Intel Corp. v. Advanced Micro Devices, Inc. from Wikipedia
• Advanced Micro Devices, Inc. v. Intel Corp. from Wikipedia
• AMD Accelerated Processing Unit from Wikipedia
• Graphics Core Next from Wikipedia
• AMD Corporate Website
• Inside AMD’s Hammer: the 64-bit architecture behind the Opteron and Athlon 64 by Jon Stokes, ars technica, February 01, 2005
• Understanding the detailed Architecture of AMD’s 64 bit Core by Hans de Vries, September 21, 2003
• AMD releases new Ryzen processor by Albert Silver, ChessBase News, March 03, 2017

References#

1. ↑ AMD headquarters, Sunnyvale, California, from Advanced Micro Devices from Wikipedia
2. ↑ Advanced Micro Devices from Wikipedia
3. ↑ Ryzen Fritz Chess Benchmarks ? by ralunger, Rybka Forum, March 03, 2017
4. ↑ Ryzen and BMI2: Strange behavior and high latencies by DonnieTinyHands, Reddit, March 20, 2017
5. ↑ Re: Komodo 11.3 by Mark Lefler, CCC, March 04, 2018 » BMI2 PEXT, Komodo 11.3
6. ↑ Paris - Trier - Lünen, Photos WMCCC 1997 by Thorsten Czub
7. ↑ REBEL vs GM Vishy Anand
8. ↑ Jeroen Noomen, Ed Schröder (1998). Anand versus Rebel 10 exp. ICCA Journal, Vol. 21, No. 3
9. ↑ BELCT 2001 Berlin is worth a trip! Photos by Thomas Mayer
10. ↑ List of AMD microprocessors from Wikipedia
11. ↑ Re: Komodo 11.3 by Mark Lefler, CCC, March 04, 2018
12. ↑ Ryzen from Wikipedia
13. ↑ Graphics Core Next from Wikipedia
14. ↑ AMD Accelerated Processing Unit from Wikipedia

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