Apparatus and methods for execution of computer instructions

Boots – shoes – and leggings

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

36474803, 36474805, 36475401, 36476002, 36474809, G06F 738, G06F 750, G06F 752

Patent

active

060991585

ABSTRACT:
A computer instruction execution unit includes different execution paths for different categories of instructions. Different execution paths share circuitry. The slower execution paths are pipelined. In some embodiments, all execution paths are pipelined. Fast instructions are executed by a fast execution path. Slower instructions are executed by a slower execution path. Faster instructions immediately following the slower instruction are also executed by the slower execution path not to block the shared circuitry. Consequently, the throughput is increased and the average instruction execution latency is reduced. When a sufficient number of clock cycles accumulate with no instructions started, subsequent fast instructions are executed by the fast execution path. A floating point multiplier is provided in which normalization/denormalization shift amounts are generated in parallel with multiplication of the significands of the operands. A floating point multiplier is provided in which the result is rounded in parallel with multiplication of the significands of the operands.

REFERENCES:
patent: H1222 (1993-08-01), Brown et al.
patent: 3900723 (1975-08-01), Bethany et al.
patent: 4217657 (1980-08-01), Handly et al.
patent: 4488252 (1984-12-01), Vassar
patent: 4589067 (1986-05-01), Porter et al.
patent: 4683547 (1987-07-01), DeGroot
patent: 4777613 (1988-10-01), Shahan et al.
patent: 4839846 (1989-06-01), Hirose et al.
patent: 4866652 (1989-09-01), Chu et al.
patent: 4878190 (1989-10-01), Darley et al.
patent: 4926369 (1990-05-01), Hokenek et al.
patent: 4941120 (1990-07-01), Brown et al.
patent: 4999802 (1991-03-01), Cocanougher et al.
patent: 5053631 (1991-10-01), Perlman et al.
patent: 5117384 (1992-05-01), Drehmel et al.
patent: 5128888 (1992-07-01), Tamura et al.
patent: 5136536 (1992-08-01), Ng
patent: 5195051 (1993-03-01), Palaniswami
patent: 5204825 (1993-04-01), Ng
patent: 5241490 (1993-08-01), Poon
patent: 5247471 (1993-09-01), Hilker et al.
patent: 5257215 (1993-10-01), Poon
patent: 5260889 (1993-11-01), Palaniswami
patent: 5267186 (1993-11-01), Gupta et al.
patent: 5272660 (1993-12-01), Rossbach
patent: 5276634 (1994-01-01), Suzuki et al.
patent: 5282156 (1994-01-01), Miyoshi et al.
patent: 5301139 (1994-04-01), Zinger
patent: 5310134 (1994-05-01), Hsu et al.
patent: 5317527 (1994-05-01), Britton et al.
patent: 5337265 (1994-08-01), Desrosiers et al.
patent: 5341319 (1994-08-01), Madden et al.
patent: 5343413 (1994-08-01), Inoue
patent: 5357455 (1994-10-01), Sharangpani et al.
patent: 5390134 (1995-02-01), Heikes et al.
patent: 5463574 (1995-10-01), Desrosiers et al.
patent: 5481686 (1996-01-01), Dockser
patent: 5493520 (1996-02-01), Schmookler et al.
patent: 5504912 (1996-04-01), Morinaga et al.
patent: 5511016 (1996-04-01), Bechade
patent: 5517438 (1996-05-01), Dao-Trong et al.
patent: 5528525 (1996-06-01), Suzuki
patent: 5726927 (1998-03-01), Wolrich et al
patent: 5729485 (1998-03-01), Wolrich et al.
Benschneider, et al., "A Pipelined 50--MHz CMOS 62--bit Floating-Point Arithmetic Processor", IEEE Journal of Solid-State Circuits, vol. 24, No. 5, Oct. 1989, pp. 1317-1323.
Quach, et al., "An Improved Algorithm for High-Speed Floating-Point Addition", Stanford University Technical Report No. CSL-TR-90-442, Aug. 1990, pp. 1-17.
Hokenek, et al., "Second-Generation RISC Floating Point with Multiply-Add Fused", IEEE Journal of Solid-State Circuits, vol. 25, No. 5, Oct. 1990, pp. 1207-1213.
Ide, et al., "A 320--MFLOPS CMOS Floating-Point Processing Unit for Superscalar Processors", IEEE Journal of Solid-State Circuits, vol. 28, No. 3, Mar. 1993, 352-361.
Encyclopedia of Computer Science & Engineering, Second Edition, Van Nostrand Reinhold Co., New York, NY, 1983, pp. 98-102, 1322-1324.
Gwennap, et al., "UltraSparc Unleashes SPARC Performance, Next-Generation Design Could Put Sun Back in Race"Microporocessor Report, vol. 8, No. 13, Oct. 3, 1994, pp. 1-10.
Hokenek et al., "Leading-Zero Anticipator (LZA) in the IBM RISC System/6000 Floating-Point Execution Unit," IBM J. Res. Develop., vol. 34, No. 1, Jan. 1990, pp. 71-77.
Montoye, et al., "Design of the IBM RISC System/6000 Floating-Point Execution Unit," IBM J. Res. Develop., vol. 34, No. 1, Jan. 1990, pp. 59-70.
LSI Logic Databook and Design Manual, 5th Ed., HCMOS Macrocells, Macrofunctions, Oct. 1986, pp. 12-1 to 12-28.
Quach et al., "Leading One Prediction -Implementation, Generalization, and Application, Technical Report: CSL-TR-91-463," Computer Systems Laboratory, Standord University, Mar. 1991, pp. 1-12.
"IEEE Standard for Binary Floating-Point Arithmetic," Institute of Electrical and Electronics Engineers, Inc., New York, NY, ANSI/IEEE Std. 754, NO. 1994. pp. 1-18.
"IC Master 3. Advertisers Technical Data; LSI Logic Products and Services," Hearst Business Communications, Inc., IC Master, 1991, pp. 3529-3532.
The SPARC Architecture Manual, Version 8, (SPARC International, Inc., Prentice-Hall, Inc., New Jersey, 1992), pp. 1-316.
Kahan, W., et al., "A Proposed IEEE-CS Standard for Binary Floating Point Arithmetic", Proceedings of the Computer Science and Statistics: 12th Annual Symposium on the Interface, May 10-11, 1979, University of Waterloo, Waterloo, Ontario, Canada, pp. 32-36.
Yu, R.K., et al., "167 Mhz Radix-4 Floating Point Multiplier", Proceedings of the Twelfth Symposium on Computer Arithmetic (IEEE 1995), pp. 149-154.
Weste, Neil H.E., et al., "Principles of CMOS VLSI Design-A Systems Perspective" (Addison-Wesley Publishing Co., 2nd Ed., 1993), p. 532.
Hicks, T.N., et al., "POWER2 Floating-Point Unit: Architecture and Implementation", IBM J. Res. Develop., vol. 38, No. 5, Sep. 1994, pp. 525-536.
Omondi, A.R., "Computer Arithmetic Systems: Algorithms, Architecture and Implementation", 1994, pp. 76-86.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus and methods for execution of computer instructions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and methods for execution of computer instructions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and methods for execution of computer instructions will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1143757

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.