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merged 2 commits into from
Nov 14, 2021
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Switch to rust-lang/rust#72016 asm! syntax #3

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41c25af
Switch to rust-lang/rust#72016 `asm!` syntax
kennystrawnmusic Jul 16, 2020
3a29ead
Operand order is reversed
kennystrawnmusic Jul 16, 2020
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6 changes: 3 additions & 3 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@

#![doc(html_root_url = "https://docs.rs/tinypci")]

#![feature(llvm_asm)]
#![feature(asm)]

#![cfg_attr(not(feature="std"), no_std)]

Expand All @@ -30,14 +30,14 @@ pub use enums::*;
#[inline]
unsafe fn read_from_port(port: u16) -> u32 {
let value: u32;
llvm_asm!("inl %dx, %eax" : "={eax}"(value) : "{dx}"(port) :: "volatile");
asm!("inl eax, dx", out("eax") value, in("dx") port);
value
}

// extracted from the `x86_64` crate.
#[inline]
unsafe fn write_to_port(port: u16, value: u32) {
llvm_asm!("outl %eax, %dx" :: "{dx}"(port), "{eax}"(value) :: "volatile");
asm!("outl dx, eax", out("dx") port, in("eax") value);
}


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