From f16d8d3d7cb939e04ad2a242e8bd058590492fe2 Mon Sep 17 00:00:00 2001
From: Noa <33094578+coolreader18@users.noreply.github.com>
Date: Thu, 11 Nov 2021 17:42:18 -0600
Subject: [PATCH] Use :e registers on x86

---
 src/elision.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/elision.rs b/src/elision.rs
index 66d61618..a9002921 100644
--- a/src/elision.rs
+++ b/src/elision.rs
@@ -56,6 +56,16 @@ impl AtomicElisionExt for AtomicUsize {
     fn elision_compare_exchange_acquire(&self, current: usize, new: usize) -> Result<usize, usize> {
         unsafe {
             let prev: usize;
+            #[cfg(target_pointer_width = "32")]
+            asm!(
+                "xacquire",
+                "lock",
+                "cmpxchg [{:e}], {:e}",
+                in(reg) self,
+                in(reg) new,
+                inout("eax") current => prev,
+            );
+            #[cfg(target_pointer_width = "64")]
             asm!(
                 "xacquire",
                 "lock",