rustc_target/spec/targets/
arm64ec_pc_windows_msvc.rs

1use crate::spec::{FramePointer, LinkerFlavor, Lld, Target, TargetMetadata, add_link_args, base};
2
3pub(crate) fn target() -> Target {
4    let mut base = base::windows_msvc::opts();
5    base.max_atomic_width = Some(128);
6    base.features = "+v8a,+neon,+fp-armv8".into();
7    add_link_args(
8        &mut base.late_link_args,
9        LinkerFlavor::Msvc(Lld::No),
10        &["/machine:arm64ec", "softintrin.lib"],
11    );
12
13    // Microsoft recommends enabling frame pointers on Arm64 Windows.
14    // From https://learn.microsoft.com/en-us/cpp/build/arm64-windows-abi-conventions?view=msvc-170#integer-registers
15    // "The frame pointer (x29) is required for compatibility with fast stack walking used by ETW
16    // and other services. It must point to the previous {x29, x30} pair on the stack."
17    base.frame_pointer = FramePointer::NonLeaf;
18
19    Target {
20        llvm_target: "arm64ec-pc-windows-msvc".into(),
21        metadata: TargetMetadata {
22            description: Some("Arm64EC Windows MSVC".into()),
23            tier: Some(3),
24            host_tools: Some(false),
25            std: None, // ?
26        },
27        pointer_width: 64,
28        data_layout:
29            "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"
30                .into(),
31        arch: "arm64ec".into(),
32        options: base,
33    }
34}