https://github.com/alexfernandez/building-efficient-software

Companion repo for the talk "Building Efficient Software"
https://github.com/alexfernandez/building-efficient-software

Last synced: about 1 month ago
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Companion repo for the talk "Building Efficient Software"

• Host: GitHub
• URL: https://github.com/alexfernandez/building-efficient-software
• Owner: alexfernandez
• License: mit
• Created: 2018-02-16T16:11:50.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-04-13T11:00:03.000Z (over 6 years ago)
• Last Synced: 2024-11-24T18:38:54.902Z (about 1 month ago)
• Language: JavaScript
• Size: 41 KB
• Stars: 1
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# building-efficient-software

Companion repo for the talk "Building Efficient Software".

## Optimization

Function multiplyTrivial32:

2 movq    move quad word

2 shrq    shift right quad-word

1 testb   compare with byte?

1 jnz     jump not zero

1 shll    shift left long?

2 movzxwl move ? long?

1 sarl    shift arithmetically right long?

3 imull   multiply long

2 addl    add long

1 shrl    shift right long?

Function multiplyMagic 32:

3 movq    move quad word

2 shrq    shift right quad-word

1 testb   compare with byte?

1 jnz     jump not zero

2 movzxwl move ? long?

1 andl    and long?

2 imull   multiply long

1 jo      jump overflow

1 leal    load effective address