SDL_HINT_CPU_FEATURE_MASK(3)

💅 SDL_HINT_CPU_FEATURE_MASK(3)

okay bestie, pull up a chair, this is one of those little hint macros from the SDL3 FUNCTIONS corner of the manual and honestly? it's giving ✨gatekeeper✨ — in the good way, because it literally is a gate for your CPU's features.

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🎀 NAME 🎀

SDL_HINT_CPU_FEATURE_MASK — a variable that limits what CPU features are available.

like, it's the bouncer at the club. only the features on the list get in. 💅

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✨ SYNOPSIS ✨

#include <SDL3/SDL_hints.h>

#define SDL_HINT_CPU_FEATURE_MASK "SDL_CPU_FEATURE_MASK"

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🦋 DESCRIPTION 🦋

so by default, SDL is so generous — it marks all the features the current CPU supports as available. everything the chip can do, SDL is like "yup, we're using that". 🫶

this hint lets you limit the enabled features to a subset. you're basically curating the guest list.

when the hint is unset, or empty, SDL will enable all detected CPU features. no notes, full roster, everyone's invited. 🎉

you set the variable to a comma separated list containing these items:

• "all"
• "altivec"
• "sse"
• "sse2"
• "sse3"
• "sse41"
• "sse42"
• "avx"
• "avx2"
• "avx512f"
• "arm-simd"
• "neon"
• "lsx"
• "lasx"

and here's the cute part — the items can be prefixed by '+'/'-' to add/remove features. plus sign to let them in, minus sign to ✂️ them out. the way that works is genuinely iconic.

ngl, if you're messing with CPU feature masks and you don't 100% know what you're doing, be careful bestie — you're telling the app it can't use stuff the chip literally has. 💀

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👑 AVAILABILITY 👑

this hint is available since SDL 3.2.0. so if you're on anything older, it's not here yet, sorry babe. 😭

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fr fr that's the whole page — no cap, every flag, every feature name, every default, all of it. 💖

this cutie was brought to you by Simple Directmedia Layer, rockin' version SDL 3.4.18 — mwah 💅✨