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What was the last CPU that did not have the x87 floating-point unit built in?



The 2019 Stack Overflow Developer Survey Results Are InWere there 8086 coprocessors other than the 8087?What was the first CPU with exposed pipeline?What's the relationship between early 90s Pentium microprocessor and today's Intel designs?Is there any reason to chose ES, FS, or GS over the others in real mode?How do you put a 286 in Protected Mode?Why not use fractions instead of floating point?Which pre-IEEE computers had a single precision FPU and implemented double precision floats in software?How did the 8086 interface with the 8087 FPU coprocessor?How did people program for Consoles with multiple CPUs?What can an 8086 CPU do if an x87 floating-point coprocessor is attached to it?










1















This Wikipedia page says the following:




Most x86 processors since the Intel 80486 have had these x87
instructions implemented in the main CPU




So the above quote means that some CPUs that were realeased after the Intel 80486 CPU did not have the x87 floating-point unit built in.



But what was the last CPU that did not have the x87 floating-point unit built in?










share|improve this question









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user12280 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    1















    This Wikipedia page says the following:




    Most x86 processors since the Intel 80486 have had these x87
    instructions implemented in the main CPU




    So the above quote means that some CPUs that were realeased after the Intel 80486 CPU did not have the x87 floating-point unit built in.



    But what was the last CPU that did not have the x87 floating-point unit built in?










    share|improve this question









    New contributor




    user12280 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.






















      1












      1








      1








      This Wikipedia page says the following:




      Most x86 processors since the Intel 80486 have had these x87
      instructions implemented in the main CPU




      So the above quote means that some CPUs that were realeased after the Intel 80486 CPU did not have the x87 floating-point unit built in.



      But what was the last CPU that did not have the x87 floating-point unit built in?










      share|improve this question









      New contributor




      user12280 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      This Wikipedia page says the following:




      Most x86 processors since the Intel 80486 have had these x87
      instructions implemented in the main CPU




      So the above quote means that some CPUs that were realeased after the Intel 80486 CPU did not have the x87 floating-point unit built in.



      But what was the last CPU that did not have the x87 floating-point unit built in?







      history intel floating-point cpu x86






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      user12280 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      user12280 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question




      share|improve this question








      edited 2 hours ago









      manassehkatz

      3,132625




      3,132625






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      asked 2 hours ago









      user12280user12280

      232




      232




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      New contributor





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          2 Answers
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          2














          All Intel x86 CPUs since the 80486 line have included floating point instructions, i.e. everything from the Pentium* onwards. So the last Intel processor to lack an on-board floating-point unit (FPU) was the 80486SX (and the embedded 80486GX).



          Other manufacturers, who made 486-compatible processors, continued making non-FPU chips, aiming for the budget market. These include Cyrix's Cx486SLC, and AMD's AM486SX. A 66MHz version of the latter, the Am486SX2-66, was released in 1994, a year after Intel had released its first Pentium processor.



          In order to compete with the Pentium range, third-party manufacturers effectively had to include an on-board FPU, so there were no "586" chips without floating-point instructions.



          I expect that the last manufactured x86 CPU that lacked floating-point instructions will have been an embedded chip such as the 80486GX.




          * for further reading, see the Pentium FDIV bug






          share|improve this answer























          • Yes, there are 586-class CPUs with no FPU.

            – Stephen Kitt
            48 mins ago


















          2














          As far as I’m aware, the last FPU-less x86-compatible CPU is the Vortex86SX, released in 2007 and still available now. This is a Pentium-class CPU, capable of running any Pentium code which doesn’t require an FPU.






          share|improve this answer

























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            2 Answers
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            active

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            2 Answers
            2






            active

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            active

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            active

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            2














            All Intel x86 CPUs since the 80486 line have included floating point instructions, i.e. everything from the Pentium* onwards. So the last Intel processor to lack an on-board floating-point unit (FPU) was the 80486SX (and the embedded 80486GX).



            Other manufacturers, who made 486-compatible processors, continued making non-FPU chips, aiming for the budget market. These include Cyrix's Cx486SLC, and AMD's AM486SX. A 66MHz version of the latter, the Am486SX2-66, was released in 1994, a year after Intel had released its first Pentium processor.



            In order to compete with the Pentium range, third-party manufacturers effectively had to include an on-board FPU, so there were no "586" chips without floating-point instructions.



            I expect that the last manufactured x86 CPU that lacked floating-point instructions will have been an embedded chip such as the 80486GX.




            * for further reading, see the Pentium FDIV bug






            share|improve this answer























            • Yes, there are 586-class CPUs with no FPU.

              – Stephen Kitt
              48 mins ago















            2














            All Intel x86 CPUs since the 80486 line have included floating point instructions, i.e. everything from the Pentium* onwards. So the last Intel processor to lack an on-board floating-point unit (FPU) was the 80486SX (and the embedded 80486GX).



            Other manufacturers, who made 486-compatible processors, continued making non-FPU chips, aiming for the budget market. These include Cyrix's Cx486SLC, and AMD's AM486SX. A 66MHz version of the latter, the Am486SX2-66, was released in 1994, a year after Intel had released its first Pentium processor.



            In order to compete with the Pentium range, third-party manufacturers effectively had to include an on-board FPU, so there were no "586" chips without floating-point instructions.



            I expect that the last manufactured x86 CPU that lacked floating-point instructions will have been an embedded chip such as the 80486GX.




            * for further reading, see the Pentium FDIV bug






            share|improve this answer























            • Yes, there are 586-class CPUs with no FPU.

              – Stephen Kitt
              48 mins ago













            2












            2








            2







            All Intel x86 CPUs since the 80486 line have included floating point instructions, i.e. everything from the Pentium* onwards. So the last Intel processor to lack an on-board floating-point unit (FPU) was the 80486SX (and the embedded 80486GX).



            Other manufacturers, who made 486-compatible processors, continued making non-FPU chips, aiming for the budget market. These include Cyrix's Cx486SLC, and AMD's AM486SX. A 66MHz version of the latter, the Am486SX2-66, was released in 1994, a year after Intel had released its first Pentium processor.



            In order to compete with the Pentium range, third-party manufacturers effectively had to include an on-board FPU, so there were no "586" chips without floating-point instructions.



            I expect that the last manufactured x86 CPU that lacked floating-point instructions will have been an embedded chip such as the 80486GX.




            * for further reading, see the Pentium FDIV bug






            share|improve this answer













            All Intel x86 CPUs since the 80486 line have included floating point instructions, i.e. everything from the Pentium* onwards. So the last Intel processor to lack an on-board floating-point unit (FPU) was the 80486SX (and the embedded 80486GX).



            Other manufacturers, who made 486-compatible processors, continued making non-FPU chips, aiming for the budget market. These include Cyrix's Cx486SLC, and AMD's AM486SX. A 66MHz version of the latter, the Am486SX2-66, was released in 1994, a year after Intel had released its first Pentium processor.



            In order to compete with the Pentium range, third-party manufacturers effectively had to include an on-board FPU, so there were no "586" chips without floating-point instructions.



            I expect that the last manufactured x86 CPU that lacked floating-point instructions will have been an embedded chip such as the 80486GX.




            * for further reading, see the Pentium FDIV bug







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 1 hour ago









            KazKaz

            2,456942




            2,456942












            • Yes, there are 586-class CPUs with no FPU.

              – Stephen Kitt
              48 mins ago

















            • Yes, there are 586-class CPUs with no FPU.

              – Stephen Kitt
              48 mins ago
















            Yes, there are 586-class CPUs with no FPU.

            – Stephen Kitt
            48 mins ago





            Yes, there are 586-class CPUs with no FPU.

            – Stephen Kitt
            48 mins ago











            2














            As far as I’m aware, the last FPU-less x86-compatible CPU is the Vortex86SX, released in 2007 and still available now. This is a Pentium-class CPU, capable of running any Pentium code which doesn’t require an FPU.






            share|improve this answer





























              2














              As far as I’m aware, the last FPU-less x86-compatible CPU is the Vortex86SX, released in 2007 and still available now. This is a Pentium-class CPU, capable of running any Pentium code which doesn’t require an FPU.






              share|improve this answer



























                2












                2








                2







                As far as I’m aware, the last FPU-less x86-compatible CPU is the Vortex86SX, released in 2007 and still available now. This is a Pentium-class CPU, capable of running any Pentium code which doesn’t require an FPU.






                share|improve this answer















                As far as I’m aware, the last FPU-less x86-compatible CPU is the Vortex86SX, released in 2007 and still available now. This is a Pentium-class CPU, capable of running any Pentium code which doesn’t require an FPU.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 1 hour ago

























                answered 1 hour ago









                Stephen KittStephen Kitt

                40k8163173




                40k8163173




















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                    ValueError: Expected n_neighbors <= n_samples, but n_samples = 1, n_neighbors = 6 (SMOTE) The 2019 Stack Overflow Developer Survey Results Are InCan SMOTE be applied over sequence of words (sentences)?ValueError when doing validation with random forestsSMOTE and multi class oversamplingLogic behind SMOTE-NC?ValueError: Error when checking target: expected dense_1 to have shape (7,) but got array with shape (1,)SmoteBoost: Should SMOTE be ran individually for each iteration/tree in the boosting?solving multi-class imbalance classification using smote and OSSUsing SMOTE for Synthetic Data generation to improve performance on unbalanced dataproblem of entry format for a simple model in KerasSVM SMOTE fit_resample() function runs forever with no result