https://github.com/bentobaux/toupper-simd

Converting lowercase to uppercase using SIMD in x86 Assembly.
https://github.com/bentobaux/toupper-simd

c simd sse toupper vectorization x86 x86-assembly

Last synced: about 2 months ago
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Converting lowercase to uppercase using SIMD in x86 Assembly.

• Host: GitHub
• URL: https://github.com/bentobaux/toupper-simd
• Owner: bentoBAUX
• Created: 2024-12-07T11:44:43.000Z (6 months ago)
• Default Branch: master
• Last Pushed: 2025-01-05T15:33:08.000Z (5 months ago)
• Last Synced: 2025-02-06T03:39:40.970Z (4 months ago)
• Topics: c, simd, sse, toupper, vectorization, x86, x86-assembly
• Language: Assembly
• Homepage:
• Size: 473 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ToUpper() in SIMD x86 Assembly

Working with SIMD requires a little bit of brain gymnastics. To ease your understanding on this implementation, I have prepared a schematic. The requirements for this is that you already understand how to perform conditional checks using `pcmp` (Packed Compare) commands in x86 Assembly.

## Usage & Example

```cmd

> gcc -o  src/simpleTest.c src/toupper.S

> ./

  Before: Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

  After: LOREM IPSUM DOLOR SIT AMET, CONSECTETUR ADIPISCING ELIT, SED DO EIUSMOD TEMPOR INCIDIDUNT UT LABORE ET DOLORE MAGNA ALIQUA.

```

## Schematic 

![Schematic](https://github.com/bentoBAUX/toupper_simd/blob/master/Schematic.png)