Merge #223

223: Use llvm_asm! instead of asm! r=Amanieu a=Amanieu

`asm!` will be deprecated soon in preparation for the new `asm!` macro, so switch to using `llvm_asm!` instead.

cc rust-lang/rfcs#2843

Co-authored-by: Amanieu d'Antras <[email protected]>

Author: bors[bot]

src/elision.rs

@@ -57,11 +57,11 @@ impl AtomicElisionExt for AtomicUsize {
     fn elision_compare_exchange_acquire(&self, current: usize, new: usize) -> Result<usize, usize> {
         unsafe {
             let prev: usize;
-            asm!("xacquire; lock; cmpxchgl $2, $1"
-                 : "={eax}" (prev), "+*m" (self)
-                 : "r" (new), "{eax}" (current)
-                 : "memory"
-                 : "volatile");
+            llvm_asm!("xacquire; lock; cmpxchgl $2, $1"
+                      : "={eax}" (prev), "+*m" (self)
+                      : "r" (new), "{eax}" (current)
+                      : "memory"
+                      : "volatile");
             if prev == current {
                 Ok(prev)
             } else {
@@ -74,11 +74,11 @@ impl AtomicElisionExt for AtomicUsize {
     fn elision_compare_exchange_acquire(&self, current: usize, new: usize) -> Result<usize, usize> {
         unsafe {
             let prev: usize;
-            asm!("xacquire; lock; cmpxchgq $2, $1"
-                 : "={rax}" (prev), "+*m" (self)
-                 : "r" (new), "{rax}" (current)
-                 : "memory"
-                 : "volatile");
+            llvm_asm!("xacquire; lock; cmpxchgq $2, $1"
+                      : "={rax}" (prev), "+*m" (self)
+                      : "r" (new), "{rax}" (current)
+                      : "memory"
+                      : "volatile");
             if prev == current {
                 Ok(prev)
             } else {
@@ -92,11 +92,11 @@ impl AtomicElisionExt for AtomicUsize {
     fn elision_fetch_sub_release(&self, val: usize) -> usize {
         unsafe {
             let prev: usize;
-            asm!("xrelease; lock; xaddl $2, $1"
-                 : "=r" (prev), "+*m" (self)
-                 : "0" (val.wrapping_neg())
-                 : "memory"
-                 : "volatile");
+            llvm_asm!("xrelease; lock; xaddl $2, $1"
+                      : "=r" (prev), "+*m" (self)
+                      : "0" (val.wrapping_neg())
+                      : "memory"
+                      : "volatile");
             prev
         }
     }
@@ -105,11 +105,11 @@ impl AtomicElisionExt for AtomicUsize {
     fn elision_fetch_sub_release(&self, val: usize) -> usize {
         unsafe {
             let prev: usize;
-            asm!("xrelease; lock; xaddq $2, $1"
-                 : "=r" (prev), "+*m" (self)
-                 : "0" (val.wrapping_neg())
-                 : "memory"
-                 : "volatile");
+            llvm_asm!("xrelease; lock; xaddq $2, $1"
+                      : "=r" (prev), "+*m" (self)
+                      : "0" (val.wrapping_neg())
+                      : "memory"
+                      : "volatile");
             prev
         }
     }

src/lib.rs

@@ -11,7 +11,7 @@
 
 #![warn(missing_docs)]
 #![warn(rust_2018_idioms)]
-#![cfg_attr(feature = "nightly", feature(asm))]
+#![cfg_attr(feature = "nightly", feature(llvm_asm))]
 
 mod condvar;
 mod elision;