X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fassembly%2Fx86%2Falloc.lisp;h=ef7a0261d59b102fbe3a07b3d8c5e7925648b193;hb=37fbb0be837f1d17650c7329469819dd31b762e1;hp=897855b5572141b612aa27313ed03e0eea3b9835;hpb=6147892310586401bae00de7e65a386c72531136;p=sbcl.git

diff --git a/src/assembly/x86/alloc.lisp b/src/assembly/x86/alloc.lisp
index 897855b..ef7a026 100644
--- a/src/assembly/x86/alloc.lisp
+++ b/src/assembly/x86/alloc.lisp
@@ -100,11 +100,12 @@
                (inst push other)
                (inst push target)
                (emit-label get-tls-index-lock)
-               (inst mov target 1)
-               (inst xor eax-tn eax-tn)
-               (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*)
-                     target :lock)
-               (inst jmp :ne get-tls-index-lock)
+               (let ((not-eax ,(if (eql 'eax reg) 'other 'target)))
+                 (inst mov not-eax 1)
+                 (inst xor eax-tn eax-tn)
+                 (inst cmpxchg (make-ea-for-symbol-value *tls-index-lock*)
+                       not-eax :lock)
+                 (inst jmp :ne get-tls-index-lock))
                ;; The symbol is now in OTHER.
                (inst pop other)
                ;; Now with the lock held, see if the symbol's tls index has been