Reviewers: Erik Corry,
Description:
Add missing file.
[email protected]
Please review this at http://codereview.chromium.org/6358005/
SVN Base: https://v8.googlecode.com/svn/branches/experimental/gc
Affected files:
A src/compiler-intrinsics.h
Index: src/compiler-intrinsics.h
diff --git a/src/compiler-intrinsics.h b/src/compiler-intrinsics.h
new file mode 100644
index
0000000000000000000000000000000000000000..bce5d56e25ef91a2b8af5dcf6b68e0596548609e
--- /dev/null
+++ b/src/compiler-intrinsics.h
@@ -0,0 +1,59 @@
+// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_COMPILER_INTRINSICS_H_
+#define V8_COMPILER_INTRINSICS_H_
+
+namespace v8 {
+namespace internal {
+
+class CompilerIntrinsics {
+ public:
+ // Returns number of zero bits preceding least significant 1 bit.
+ // Undefined for zero value.
+ INLINE(static int CountTrailingZeros(uint32_t value));
+
+ // Returns number of zero bits following most significant 1 bit.
+ // Undefined for zero value.
+ INLINE(static int CountLeadingZeros(uint32_t value));
+};
+
+#ifdef __GNUC__
+int CompilerIntrinsics::CountTrailingZeros(uint32_t value) {
+ return __builtin_ctz(value);
+}
+
+int CompilerIntrinsics::CountLeadingZeros(uint32_t value) {
+ return __builtin_clz(value);
+}
+#else
+#error Unsupported compiler
+#endif
+
+} } // namespace v8::internal
+
+#endif // V8_COMPILER_INTRINSICS_H_
--
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