Origin: https://hg.mozilla.org/integration/autoland/rev/e9b01ce8e2fe

# HG changeset patch
# User Jeff Muizelaar <jmuizelaar@mozilla.com>
# Date 1709608348 0
# Node ID e9b01ce8e2fe053ffef77505f05cf18ed0b9fcd2
# Parent  171664703051d94e1be995b74ad97a9dff5beea5
Bug 1882291. Switch to stdarch_arm_neon_intrinsics feature on rust >=1.78. r=glandium

We only need this on ARM32 because the ARM64 intrinsics are stable.

stdarch_arm_neon_intrinsics was split out from stdsimd here:
https://github.com/rust-lang/stdarch/pull/1486

Differential Revision: https://phabricator.services.mozilla.com/D203039

diff --git a/Cargo.lock b/Cargo.lock
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4579,16 +4579,17 @@ dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "qcms"
 version = "0.2.0"
 dependencies = [
  "libc",
+ "version_check",
 ]
 
 [[package]]
 name = "qlog"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8777d5490145d6907198d48b3a907447689ce80e071b3d8a16a9d9fb3df02bc1"
 dependencies = [
diff --git a/gfx/qcms/Cargo.toml b/gfx/qcms/Cargo.toml
--- a/gfx/qcms/Cargo.toml
+++ b/gfx/qcms/Cargo.toml
@@ -15,8 +15,11 @@ categories = ["graphics"]
 default = ["iccv4-enabled", "cmyk"]
 c_bindings = ["libc"]
 neon = []
 iccv4-enabled = []
 cmyk = []
 
 [dependencies]
 libc = {version = "0.2", optional = true }
+
+[build-dependencies]
+version_check = "0.9"
diff --git a/gfx/qcms/build.rs b/gfx/qcms/build.rs
new file mode 100644
--- /dev/null
+++ b/gfx/qcms/build.rs
@@ -0,0 +1,7 @@
+extern crate version_check as rustc;
+
+fn main() {
+    if rustc::is_min_version("1.78.0").unwrap_or(false) {
+        println!("cargo:rustc-cfg=stdsimd_split");
+    }
+}
diff --git a/gfx/qcms/src/lib.rs b/gfx/qcms/src/lib.rs
--- a/gfx/qcms/src/lib.rs
+++ b/gfx/qcms/src/lib.rs
@@ -2,19 +2,21 @@
 */
 
 #![allow(dead_code)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
 #![allow(non_upper_case_globals)]
 // These are needed for the neon SIMD code and can be removed once the MSRV supports the
 // instrinsics we use
-#![cfg_attr(feature = "neon", feature(stdsimd))]
+#![cfg_attr(all(stdsimd_split, target_arch = "arm", feature = "neon"), feature(stdarch_arm_neon_intrinsics))]
+#![cfg_attr(all(stdsimd_split, target_arch = "arm", feature = "neon"), feature(stdarch_arm_feature_detection))]
+#![cfg_attr(all(not(stdsimd_split), target_arch = "arm", feature = "neon"), feature(stdsimd))]
 #![cfg_attr(
-    feature = "neon",
+    all(target_arch = "arm", feature = "neon"),
     feature(arm_target_feature, raw_ref_op)
 
 )]
 
 /// These values match the Rendering Intent values from the ICC spec
 #[repr(C)]
 #[derive(Clone, Copy, Debug)]
 pub enum Intent {