Closed
Description
openedon Feb 25, 2024
Code
pub unsafe fn _mm_stream_si32(mem_addr: *mut i32, a: i32) {
std::arch::asm!(
"movnti [{mem_addr}], {a}",
mem_addr = in(reg) mem_addr,
a = in(reg) a,
);
}Current output
warning: formatting may not be suitable for sub-register argument
--> src/lib.rs:3:31
|
3 | "movnti [{mem_addr}], {a}",
| ^^^
4 | mem_addr = in(reg) mem_addr,
5 | a = in(reg) a,
| - for this argument
|
= help: use `{1:e}` to have the register formatted as `eax`
= help: or use `{1:r}` to keep the default formatting of `rax`
= note: `#[warn(asm_sub_register)]` on by defaultDesired output
warning: formatting may not be suitable for sub-register argument
--> src/lib.rs:3:31
|
3 | "movnti [{mem_addr}], {a}",
| ^^^
4 | mem_addr = in(reg) mem_addr,
5 | a = in(reg) a,
| - for this argument
|
= help: use `{1:e}` to have the register formatted as `eax` (for 32bit values)
= help: or use `{1:r}` to keep the default formatting of `rax` (for 64bit values)
= note: `#[warn(asm_sub_register)]` on by defaultRationale and extra context
This is my first time writing inline assembly. I don't yet know all the Intel register class prefixes by hand. So telling me which prefix corresponds to which size would be very helpful. :)
Other cases
No response
Rust Version
$ rustc --version -v
rustc 1.78.0-nightly (8f359beca 2024-02-23)
binary: rustc
commit-hash: 8f359beca4e58bc3ae795a666301a8f47023044c
commit-date: 2024-02-23
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0Anything else?
No response
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