CISC, RISC, and DSP Microprocessors

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What’s Next: 50M transistors • Approaching limits of superscalability • Economics of IC manufacturing say more transistors per microprocessor chip – VLIW? – Symmetric multi-processor on a chip? – Heterogeneous multi-processor on a chip? • The latter is emerging (DSP+ARM, Pentium + MMX) 4/6/00 CISC, RISC, and DSP D.L. Jones 38
Question • Are there other embedded microprocessor types besides DSP waiting to emerge? • AI has been tried and failed • Video game uPs (“Emotion Engine”) • Need application area with unique enough requirements that it’s not well served by existing families 4/6/00 CISC, RISC, and DSP D.L. Jones 39
Page 1 and 2: CISC, RISC, and DSP Microprocessors
Page 3 and 4: Goals for this Lecture • Understa
Page 5 and 6: • Many addressing modes • Relat
Page 7 and 8: • Wider buses for high-performanc
Page 9 and 10: • Harvard architecture: separate
Page 11 and 12: • Meanwhile, there was RISC ... 4
Page 13 and 14: Arguments Advanced for RISC • Sma
Page 15 and 16: Arguments Advanced for CISC • Few
Page 17 and 18: CISC Processors circa 1999 • Cloc
Page 19 and 20: • Very expensive (100s of dollars
Page 21 and 22: DSP Microprocessors circa 1999 •
Page 23 and 24: Questions • If CISC and RISC have
Page 25 and 26: • Market needs in DSP embedded sy
Page 27 and 28: Myth and Reality in RISC vs CISC
Page 29 and 30: The Real Answer (Opinion!) • The
Page 31 and 32: Implications • These curves STRON
Page 33 and 34: • It wasn’t about RISC at all,
Page 35 and 36: Even More Transistors ... • Then
Page 37: • This pushed CISC designs to be
Page 41 and 42: Future of DSP Microprocessors • D

CISC, RISC, and DSP Microprocessors

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