John Gustafson’s crusade to replace floating point with something better

Re:John Gustafson’s crusade to replace floating point with s... by hrydgard on Tuesday July 09, 2019 @02:59AM (#20389567)

Compilers now exclusively target the SSE registers (with scalar SSE instructions like mulss), and they did 7 years ago too.

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Re:John Gustafson’s crusade to replace floating point with s... by account42 on Tuesday July 09, 2019 @07:08AM (#20390625)

https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

  -mfpmath=unit
  
      Generate floating-point arithmetic for selected unit unit. The choices for unit are:
  
      ‘387’
  
          Use the standard 387 floating-point coprocessor present on the majority of chips and emulated otherwise. Code compiled with this option runs almost everywhere. The temporary results are computed in 80-bit precision instead of the precision specified by the type, resulting in slightly different results compared to most of other chips. See -ffloat-store for more detailed description.
  
          This is the default choice for non-Darwin x86-32 targets.

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