rustc_target/spec/targets/
arm64ec_pc_windows_msvc.rs

1use crate::spec::{
2    Arch, FramePointer, LinkerFlavor, Lld, Target, TargetMetadata, add_link_args, base,
3};
4
5pub(crate) fn target() -> Target {
6    let mut base = base::windows_msvc::opts();
7    base.max_atomic_width = Some(128);
8    base.features = "+v8a,+neon,+fp-armv8".into();
9    add_link_args(
10        &mut base.late_link_args,
11        LinkerFlavor::Msvc(Lld::No),
12        &["/machine:arm64ec", "softintrin.lib"],
13    );
14
15    // Microsoft recommends enabling frame pointers on Arm64 Windows.
16    // From https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#integer-registers
17    // "The frame pointer (x29) is required for compatibility with fast stack walking used by ETW
18    // and other services. It must point to the previous {x29, x30} pair on the stack."
19    base.frame_pointer = FramePointer::NonLeaf;
20
21    Target {
22        llvm_target: "arm64ec-pc-windows-msvc".into(),
23        metadata: TargetMetadata {
24            description: Some("Arm64EC Windows MSVC".into()),
25            tier: Some(2),
26            host_tools: Some(false),
27            std: Some(true),
28        },
29        pointer_width: 64,
30        data_layout:
31            "e-m:w-p270:32:32-p271:32:32-p272:64:64-p:64:64-i32:32-i64:64-i128:128-n32:64-S128-Fn32"
32                .into(),
33        arch: Arch::Arm64EC,
34        options: base,
35    }
36}