Add m-esr52 at 52.6.0

1 files changed, 73 insertions, 0 deletions

diff --git a/js/src/jit/AtomicOp.h b/js/src/jit/AtomicOp.h
new file mode 100644
index 000000000..9a686cdd7
--- /dev/null
+++ b/js/src/jit/AtomicOp.h
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_AtomicOp_h
+#define jit_AtomicOp_h
+
+namespace js {
+namespace jit {
+
+// Types of atomic operation, shared by MIR and LIR.
+
+enum AtomicOp {
+    AtomicFetchAddOp,
+    AtomicFetchSubOp,
+    AtomicFetchAndOp,
+    AtomicFetchOrOp,
+    AtomicFetchXorOp
+};
+
+// Memory barrier types, shared by MIR and LIR.
+//
+// MembarSynchronizing is here because some platforms can make the
+// distinction (DSB vs DMB on ARM, SYNC vs parameterized SYNC on MIPS)
+// but there's been no reason to use it yet.
+
+enum MemoryBarrierBits {
+    MembarLoadLoad = 1,
+    MembarLoadStore = 2,
+    MembarStoreStore = 4,
+    MembarStoreLoad = 8,
+
+    MembarSynchronizing = 16,
+
+    // For validity testing
+    MembarNobits = 0,
+    MembarAllbits = 31,
+};
+
+static inline constexpr MemoryBarrierBits
+operator|(MemoryBarrierBits a, MemoryBarrierBits b)
+{
+    return MemoryBarrierBits(int(a) | int(b));
+}
+
+static inline constexpr MemoryBarrierBits
+operator&(MemoryBarrierBits a, MemoryBarrierBits b)
+{
+    return MemoryBarrierBits(int(a) & int(b));
+}
+
+static inline constexpr MemoryBarrierBits
+operator~(MemoryBarrierBits a)
+{
+    return MemoryBarrierBits(~int(a));
+}
+
+// Standard barrier bits for a full barrier.
+static constexpr MemoryBarrierBits MembarFull = MembarLoadLoad|MembarLoadStore|MembarStoreLoad|MembarStoreStore;
+
+// Standard sets of barrier bits for atomic loads and stores.
+// See http://gee.cs.oswego.edu/dl/jmm/cookbook.html for more.
+static constexpr MemoryBarrierBits MembarBeforeLoad = MembarNobits;
+static constexpr MemoryBarrierBits MembarAfterLoad = MembarLoadLoad|MembarLoadStore;
+static constexpr MemoryBarrierBits MembarBeforeStore = MembarStoreStore;
+static constexpr MemoryBarrierBits MembarAfterStore = MembarStoreLoad;
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_AtomicOp_h */