From e5c4aff96d4fc1ff98fb308ce4956ca3b70ea954 Mon Sep 17 00:00:00 2001
From: jake <77554505+brxken128@users.noreply.github.com>
Date: Sun, 22 Oct 2023 02:14:19 +0100
Subject: [PATCH] add support for `wasm`'s `v128` SIMD register

---
 zeroize/src/lib.rs    |  2 ++
 zeroize/src/wasm32.rs | 22 ++++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 zeroize/src/wasm32.rs

diff --git a/zeroize/src/lib.rs b/zeroize/src/lib.rs
index b67b5c95..dc27eb3f 100644
--- a/zeroize/src/lib.rs
+++ b/zeroize/src/lib.rs
@@ -247,6 +247,8 @@ pub use zeroize_derive::{Zeroize, ZeroizeOnDrop};
 
 #[cfg(all(feature = "aarch64", target_arch = "aarch64"))]
 mod aarch64;
+#[cfg(all(target_arch = "wasm32", target_family = "wasm"))]
+mod wasm32;
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 mod x86;
 
diff --git a/zeroize/src/wasm32.rs b/zeroize/src/wasm32.rs
new file mode 100644
index 00000000..88442aa8
--- /dev/null
+++ b/zeroize/src/wasm32.rs
@@ -0,0 +1,22 @@
+//! [`Zeroize`] impls for WASM SIMD registers.
+
+use crate::{atomic_fence, volatile_write, Zeroize};
+
+use core::arch::wasm32::v128;
+
+macro_rules! impl_zeroize_for_simd_register {
+    ($($type:ty),* $(,)?) => {
+        $(
+            #[cfg_attr(docsrs, doc(cfg(target_arch = "wasm32", target_family = "wasm")))]
+            impl Zeroize for $type {
+                #[inline]
+                fn zeroize(&mut self) {
+                    volatile_write(self, unsafe { core::mem::zeroed() });
+                    atomic_fence();
+                }
+            }
+        )+
+    };
+}
+
+impl_zeroize_for_simd_register!(v128);