https://github.com/l1mey112/fp-rounding-emulation

https://github.com/l1mey112/fp-rounding-emulation

Last synced: 20 days ago
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• Host: GitHub
• URL: https://github.com/l1mey112/fp-rounding-emulation
• Owner: l1mey112
• Created: 2024-08-19T12:35:13.000Z (3 months ago)
• Default Branch: master
• Last Pushed: 2024-09-05T07:27:23.000Z (3 months ago)
• Last Synced: 2024-10-10T11:24:44.843Z (about 1 month ago)
• Language: C
• Size: 31.3 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# https://stackoverflow.com/questions/78776730/double-floating-point-operations-using-four-ieee-rounding-modes-implemented-in-t/78779343#comment138931233_78779343

```

l-m@debdinger ~/g/fp-rounding-emulation (master)> gcc *.c -lm -Wshadow -O3 && ./a.out

fadd:

  fprc(0): 2clks

  fprc(1): 45clks [100000/100000] x17 overhead

  fprc(2): 21clks [100000/100000] x8 overhead

  fprc(3): 10clks [100000/100000] x4 overhead

fsub:

  fprc(0): 2clks

  fprc(1): 46clks [100000/100000] x17 overhead

  fprc(2): 22clks [100000/100000] x8 overhead

  fprc(3): 10clks [100000/100000] x4 overhead

fmul:

  fprc(0): 3clks

  fprc(1): 76clks [100000/100000] x23 overhead

  fprc(2): 38clks [100000/100000] x12 overhead

  fprc(3): 39clks [100000/100000] x12 overhead

fmul (fma):

  fprc(0): 3clks

  fprc(1): 32clks [100000/100000] x10 overhead

  fprc(2): 12clks [100000/100000] x4 overhead

  fprc(3): 14clks [100000/100000] x4 overhead

fdiv:

  fprc(0): 3clks

  fprc(1): 94clks [100000/100000] x24 overhead

  fprc(2): 64clks [100000/100000] x16 overhead

  fprc(3): 64clks [100000/100000] x16 overhead

fdiv (fma):

  fprc(0): 4clks

  fprc(1): 45clks [100000/100000] x10 overhead

  fprc(2): 18clks [100000/100000] x4 overhead

  fprc(3): 17clks [100000/100000] x4 overhead

fsqrt:

  fprc(0): 8clks

  fprc(1): 97clks [100000/100000] x12 overhead

  fprc(2): 67clks [100000/100000] x8 overhead

  fprc(3): 69clks [100000/100000] x8 overhead

fsqrt (fma):

  fprc(0): 8clks

  fprc(1): 52clks [100000/100000] x6 overhead

  fprc(2): 24clks [100000/100000] x3 overhead

  fprc(3): 23clks [100000/100000] x3 overhead

```