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Diffstat (limited to 'Source/JavaScriptCore/bytecode/BytecodeConventions.h')
| -rw-r--r-- | Source/JavaScriptCore/bytecode/BytecodeConventions.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/BytecodeConventions.h b/Source/JavaScriptCore/bytecode/BytecodeConventions.h new file mode 100644 index 000000000..f33b060f8 --- /dev/null +++ b/Source/JavaScriptCore/bytecode/BytecodeConventions.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2012 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 BytecodeConventions_h +#define BytecodeConventions_h + +// Register numbers used in bytecode operations have different meaning according to their ranges: +// 0x80000000-0xFFFFFFFF Negative indices from the CallFrame pointer are entries in the call frame, see RegisterFile.h. +// 0x00000000-0x3FFFFFFF Forwards indices from the CallFrame pointer are local vars and temporaries with the function's callframe. +// 0x40000000-0x7FFFFFFF Positive indices from 0x40000000 specify entries in the constant pool on the CodeBlock. +static const int FirstConstantRegisterIndex = 0x40000000; + +#endif // BytecodeConventions_h + |