avr_builtins(3avr)

✨ NAME ✨

avr_builtins — <avr/builtins.h>: the avr-gcc builtins documentation, bestie 💖

So like, this is the whole lowdown on those magic little compiler builtins that talk straight to your AVR chip. No cap.

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🌸 SYNOPSIS 🌸

🎀 Functions 🎀

void __builtin_avr_sei (void)
void __builtin_avr_cli (void)
void __builtin_avr_sleep (void)
void __builtin_avr_wdr (void)
uint8_t __builtin_avr_swap (uint8_t __b)
uint16_t __builtin_avr_fmul (uint8_t __a, uint8_t __b)
int16_t __builtin_avr_fmuls (int8_t __a, int8_t __b)
int16_t __builtin_avr_fmulsu (int8_t __a, uint8_t __b)

🦋 Detailed Description 🦋

#include <avr/builtins.h>

Note: this file only documents some avr-gcc builtins, okay? It's giving "the highlights reel", not "the whole album". For functions that are built in to the compiler, there should be no prototype declarations — none, zero, don't do it. 🚫

Also, go check the GCC documentation for the full, exhaustive list of avr-gcc builtins if you're the kind of girlie who needs every single one. 💅

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👑 Function Documentation 👑

🫶 void __builtin_avr_cli (void ) [extern]

Disables all interrupts, by clearing the global interrupt mask. The whole vibe is silenced, fr fr. 😭

🫶 uint16_t __builtin_avr_fmul (uint8_t __a, uint8_t __b) [extern]

Emits an FMUL (fractional multiply unsigned) instruction. Math but make it hardware. ✨

🫶 int16_t __builtin_avr_fmuls (int8_t __a, int8_t __b) [extern]

Emits an FMUL (fractional multiply signed) instruction. Signed girlies, this one's for you. 💅

🫶 int16_t __builtin_avr_fmulsu (int8_t __a, uint8_t __b) [extern]

Emits an FMUL (fractional multiply signed with unsigned) instruction — the collab we didn't know we needed. 🔥

🫶 void __builtin_avr_sei (void ) [extern]

Enables interrupts, by setting the global interrupt mask. She's awake. She's ready. Periodt. 👑

🫶 void __builtin_avr_sleep (void ) [extern]

Emits a SLEEP instruction. Literally the chip's version of a nap, and honestly? Valid. 😴💤

🫶 uint8_t __builtin_avr_swap (uint8_t __b) [extern]

Emits a SWAP (nibble swap) instruction on __b. Two nibbles in a trench coat trading places — iconic behaviour, no notes. 🦋

🫶 void __builtin_avr_wdr (void ) [extern]

Emits a WDR (watchdog reset) instruction. Pet the watchdog so it doesn't bite. 🐕✨

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💜 Author 💜

Generated automatically by Doxygen for AVR-LibC from the source code. (The robots did the typing, we just did the slaying.) 🤖💖

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okay bestie that's the whole page, mwah 💋 — from the AVR-LibC crew, this was avr_builtins(3avr), Version 2.2.1. 🌈⭐🎀