• Thumbnail for Pentium FDIV bug
    The Pentium FDIV bug is a hardware bug affecting the floating-point unit (FPU) of the early Intel Pentium processors. Because of the bug, the processor...
    23 KB (2,536 words) - 01:32, 27 April 2025
  • Thumbnail for Pentium F00F bug
    The Pentium F00F bug is a design flaw in the majority of Intel Pentium, Pentium MMX, and Pentium OverDrive processors (all in the P5 microarchitecture)...
    12 KB (1,583 words) - 04:05, 25 March 2025
  • Thumbnail for Intel
    Intel (redirect from Intel CSME Bug)
    customers. The Pentium FDIV bug is a hardware bug affecting the floating-point unit (FPU) of the early Intel Pentium processors. Because of the bug, the processor...
    266 KB (24,667 words) - 14:03, 15 June 2025
  • Thumbnail for Pentium (original)
    Nicely at Lynchburg College, Virginia, became widely known as the Pentium FDIV bug and caused embarrassment for Intel, which created an exchange program...
    39 KB (3,758 words) - 23:00, 27 May 2025
  • Thumbnail for Pentium
    Intel Pentium processors Intel Inside Pentium FDIV bug, a well-publicized flaw in the original processor Performance Rating, informally termed Pentium Rating...
    41 KB (2,656 words) - 09:55, 8 March 2025
  • debugging under its design for testing (DFT) initiative. Following the Pentium FDIV bug, the patchable microcode function took on a wider purpose to allow...
    46 KB (5,167 words) - 17:25, 2 January 2025
  • Thumbnail for List of Intel Pentium processors
    processors do not have FDIV bug) Based on P5 microarchitecture Steppings: B1, B3, B5, C2, E0 (Note: D1 stepping processors do not have FDIV bug) Based on P5 microarchitecture...
    101 KB (3,933 words) - 19:46, 3 February 2025
  • Thumbnail for Computer
    Computer (section Bugs)
    produces unexpected results in certain situations. For instance, the Pentium FDIV bug caused some Intel microprocessors in the early 1990s to produce inaccurate...
    140 KB (14,125 words) - 23:29, 1 June 2025
  • vulnerability. The Intel Pentium series of CPUs had two well-known bugs discovered after it was brought to market, the FDIV bug affecting floating point...
    3 KB (322 words) - 06:43, 14 November 2024
  • Thumbnail for Meltdown (security vulnerability)
    discovered to have a major security vulnerability in 2017 Pentium F00F bug Pentium FDIV bug Row hammer – an unintended side effect in dynamic random-access...
    87 KB (8,241 words) - 14:35, 26 December 2024
  • Thumbnail for Erratum
    "FDIV" erratum in early Pentium processors, known as the Pentium FDIV bug. This gave incorrect answers to a floating-point division instruction (FDIV)...
    5 KB (651 words) - 19:58, 15 June 2025
  • non-BCD data is undefined. On early Intel Pentium processors, floating-point divide was subject to the Pentium FDIV bug. This also affected instructions that...
    263 KB (14,911 words) - 15:01, 7 May 2025
  • concentrated in integrated circuit design and verification. Since the Pentium FDIV bug, the complicated floating point units of modern microprocessors have...
    28 KB (2,933 words) - 21:40, 29 March 2025
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    for example, the Pentium FDIV bug became an expensive fiasco for Intel as it required a product recall because the original Pentium processor's defective...
    89 KB (9,559 words) - 19:02, 5 May 2025
  • Thumbnail for Integrated circuit design
    tiny error here can make the whole chip useless, or worse. The famous Pentium FDIV bug caused the results of a division to be wrong by at most 61 parts per...
    27 KB (3,437 words) - 14:00, 26 May 2025
  • Thumbnail for Floating-point arithmetic
    of compilers were developed that could avoid the failing cases. See Pentium FDIV bug. But an attempted computation of cos(π) yields −1 exactly. Since the...
    120 KB (14,305 words) - 16:53, 15 June 2025
  • Thumbnail for Brun's theorem
    5%. By calculating the twin primes up to 1014 (and discovering the Pentium FDIV bug along the way), Nicely heuristically estimated Brun's constant to be...
    10 KB (1,293 words) - 20:23, 29 April 2025
  • Thumbnail for J Strother Moore
    division operations of the AMD K5 microprocessor in the wake of the Pentium FDIV bug. For his contributions to automated deduction, Moore received the 1999...
    5 KB (457 words) - 07:24, 13 September 2024
  • Thomas Ray Nicely [de] (1943—2019), US mathematician, discoverer of the Pentium FDIV bug This page lists people with the surname Nicely. If an internal link...
    310 bytes (86 words) - 17:52, 6 March 2022
  • design Finite-state machine (FSM) Firmware Floating-point unit (FPU) Pentium FDIV bug Instruction pipeline Microsequencer MikroSim Millicode Superscalar...
    74 KB (8,809 words) - 14:24, 16 June 2025
  • arithmetic are employed. Galley division Multiplication algorithm Pentium FDIV bug Despite how "little" problem the optimization causes, this reciprocal...
    42 KB (5,900 words) - 19:09, 10 May 2025
  • Thumbnail for University of Lynchburg
    computations related to the distribution of prime numbers and discovered the Pentium FDIV bug. Nicely left Lynchburg College in 2000. In July 2018, the university...
    15 KB (1,087 words) - 22:12, 22 April 2025
  • Thumbnail for ACL2
    division operation of the AMD K5 microprocessor in the wake of the Pentium FDIV bug. Industrial users of ACL2 include AMD, Arm, Centaur Technology, IBM...
    5 KB (474 words) - 16:24, 14 October 2024
  • Thumbnail for Vaughan Pratt
    was credited in a 1995 Byte magazine article for proposing that the Pentium FDIV bug might have worse consequences than either Intel or IBM was predicting...
    10 KB (926 words) - 07:17, 13 September 2024
  • Thumbnail for Product recall
    90 years in prison. Worldwide: Intel recalled the original Pentium processors due to the Pentium FDIV bug. USA: October: Over 500,000 Santa Barney Pom-Pom plush...
    105 KB (11,276 words) - 21:58, 29 May 2025
  • present in the high-level code already, such as for the Pentium FDIV floating-point unit bug, or it can be inserted all the way down to physical synthesis...
    36 KB (1,037 words) - 05:58, 3 June 2025