diff options
Diffstat (limited to 'src/mscorlib/src/System/Reflection/Emit/Opcode.cs')
| -rw-r--r-- | src/mscorlib/src/System/Reflection/Emit/Opcode.cs | 271 |
1 files changed, 138 insertions, 133 deletions
diff --git a/src/mscorlib/src/System/Reflection/Emit/Opcode.cs b/src/mscorlib/src/System/Reflection/Emit/Opcode.cs index 74a9de16b6..37768be9d7 100644 --- a/src/mscorlib/src/System/Reflection/Emit/Opcode.cs +++ b/src/mscorlib/src/System/Reflection/Emit/Opcode.cs @@ -2,191 +2,196 @@ // The .NET Foundation licenses this file to you under the MIT license. // See the LICENSE file in the project root for more information. -namespace System.Reflection.Emit { using System; using System.Threading; using System.Diagnostics.Contracts; -public struct OpCode +namespace System.Reflection.Emit { - // - // Use packed bitfield for flags to avoid code bloat - // - - internal const int OperandTypeMask = 0x1F; // 000000000000000000000000000XXXXX - - internal const int FlowControlShift = 5; // 00000000000000000000000XXXX00000 - internal const int FlowControlMask = 0x0F; + public struct OpCode + { + // + // Use packed bitfield for flags to avoid code bloat + // - internal const int OpCodeTypeShift = 9; // 00000000000000000000XXX000000000 - internal const int OpCodeTypeMask = 0x07; + internal const int OperandTypeMask = 0x1F; // 000000000000000000000000000XXXXX - internal const int StackBehaviourPopShift = 12; // 000000000000000XXXXX000000000000 - internal const int StackBehaviourPushShift = 17; // 0000000000XXXXX00000000000000000 - internal const int StackBehaviourMask = 0x1F; + internal const int FlowControlShift = 5; // 00000000000000000000000XXXX00000 + internal const int FlowControlMask = 0x0F; - internal const int SizeShift = 22; // 00000000XX0000000000000000000000 - internal const int SizeMask = 0x03; + internal const int OpCodeTypeShift = 9; // 00000000000000000000XXX000000000 + internal const int OpCodeTypeMask = 0x07; - internal const int EndsUncondJmpBlkFlag = 0x01000000; // 0000000X000000000000000000000000 + internal const int StackBehaviourPopShift = 12; // 000000000000000XXXXX000000000000 + internal const int StackBehaviourPushShift = 17; // 0000000000XXXXX00000000000000000 + internal const int StackBehaviourMask = 0x1F; - // unused // 0000XXX0000000000000000000000000 + internal const int SizeShift = 22; // 00000000XX0000000000000000000000 + internal const int SizeMask = 0x03; - internal const int StackChangeShift = 28; // XXXX0000000000000000000000000000 + internal const int EndsUncondJmpBlkFlag = 0x01000000; // 0000000X000000000000000000000000 - private OpCodeValues m_value; - private int m_flags; + // unused // 0000XXX0000000000000000000000000 - internal OpCode(OpCodeValues value, int flags) - { - m_value = value; - m_flags = flags; - } + internal const int StackChangeShift = 28; // XXXX0000000000000000000000000000 - internal bool EndsUncondJmpBlk() - { - return (m_flags & EndsUncondJmpBlkFlag) != 0; - } - - internal int StackChange() - { - return (m_flags >> StackChangeShift); - } + private OpCodeValues m_value; + private int m_flags; - public OperandType OperandType - { - get + internal OpCode(OpCodeValues value, int flags) { - return (OperandType)(m_flags & OperandTypeMask); + m_value = value; + m_flags = flags; } - } - public FlowControl FlowControl - { - get + internal bool EndsUncondJmpBlk() { - return (FlowControl)((m_flags >> FlowControlShift) & FlowControlMask); + return (m_flags & EndsUncondJmpBlkFlag) != 0; } - } - public OpCodeType OpCodeType - { - get + internal int StackChange() { - return (OpCodeType)((m_flags >> OpCodeTypeShift) & OpCodeTypeMask); + return (m_flags >> StackChangeShift); } - } - public StackBehaviour StackBehaviourPop - { - get + public OperandType OperandType { - return (StackBehaviour)((m_flags >> StackBehaviourPopShift) & StackBehaviourMask); + get + { + return (OperandType)(m_flags & OperandTypeMask); + } } - } - public StackBehaviour StackBehaviourPush - { - get + public FlowControl FlowControl { - return (StackBehaviour)((m_flags >> StackBehaviourPushShift) & StackBehaviourMask); + get + { + return (FlowControl)((m_flags >> FlowControlShift) & FlowControlMask); + } } - } - public int Size - { - get + public OpCodeType OpCodeType { - return (m_flags >> SizeShift) & SizeMask; + get + { + return (OpCodeType)((m_flags >> OpCodeTypeShift) & OpCodeTypeMask); + } } - } - public short Value - { - get + public StackBehaviour StackBehaviourPop { - return (short)m_value; + get + { + return (StackBehaviour)((m_flags >> StackBehaviourPopShift) & StackBehaviourMask); + } } - } - private static volatile string[] g_nameCache; + public StackBehaviour StackBehaviourPush + { + get + { + return (StackBehaviour)((m_flags >> StackBehaviourPushShift) & StackBehaviourMask); + } + } - public String Name - { - get + public int Size { - if (Size == 0) - return null; + get + { + return (m_flags >> SizeShift) & SizeMask; + } + } - // Create and cache the opcode names lazily. They should be rarely used (only for logging, etc.) - // Note that we do not any locks here because of we always get the same names. The last one wins. - string[] nameCache = g_nameCache; - if (nameCache == null) { - nameCache = new String[0x11f]; - g_nameCache = nameCache; + public short Value + { + get + { + return (short)m_value; } + } - OpCodeValues opCodeValue = (OpCodeValues)(ushort)Value; + private static volatile string[] g_nameCache; - int idx = (int)opCodeValue; - if (idx > 0xFF) { - if (idx >= 0xfe00 && idx <= 0xfe1e) { - // Transform two byte opcode value to lower range that's suitable - // for array index - idx = 0x100 + (idx - 0xfe00); - } - else { - // Unknown opcode + public String Name + { + get + { + if (Size == 0) return null; + + // Create and cache the opcode names lazily. They should be rarely used (only for logging, etc.) + // Note that we do not any locks here because of we always get the same names. The last one wins. + string[] nameCache = g_nameCache; + if (nameCache == null) + { + nameCache = new String[0x11f]; + g_nameCache = nameCache; } - } - String name = Volatile.Read(ref nameCache[idx]); - if (name != null) - return name; + OpCodeValues opCodeValue = (OpCodeValues)(ushort)Value; + + int idx = (int)opCodeValue; + if (idx > 0xFF) + { + if (idx >= 0xfe00 && idx <= 0xfe1e) + { + // Transform two byte opcode value to lower range that's suitable + // for array index + idx = 0x100 + (idx - 0xfe00); + } + else + { + // Unknown opcode + return null; + } + } - // Create ilasm style name from the enum value name. - name = Enum.GetName(typeof(OpCodeValues), opCodeValue).ToLowerInvariant().Replace("_", "."); - Volatile.Write(ref nameCache[idx], name); - return name; + String name = Volatile.Read(ref nameCache[idx]); + if (name != null) + return name; + + // Create ilasm style name from the enum value name. + name = Enum.GetName(typeof(OpCodeValues), opCodeValue).ToLowerInvariant().Replace("_", "."); + Volatile.Write(ref nameCache[idx], name); + return name; + } } - } - [Pure] - public override bool Equals(Object obj) - { - if (obj is OpCode) - return Equals((OpCode)obj); - else - return false; - } + [Pure] + public override bool Equals(Object obj) + { + if (obj is OpCode) + return Equals((OpCode)obj); + else + return false; + } - [Pure] - public bool Equals(OpCode obj) - { - return obj.Value == Value; - } + [Pure] + public bool Equals(OpCode obj) + { + return obj.Value == Value; + } - [Pure] - public static bool operator ==(OpCode a, OpCode b) - { - return a.Equals(b); - } + [Pure] + public static bool operator ==(OpCode a, OpCode b) + { + return a.Equals(b); + } - [Pure] - public static bool operator !=(OpCode a, OpCode b) - { - return !(a == b); - } + [Pure] + public static bool operator !=(OpCode a, OpCode b) + { + return !(a == b); + } - public override int GetHashCode() - { - return Value; - } + public override int GetHashCode() + { + return Value; + } - public override String ToString() - { - return Name; + public override String ToString() + { + return Name; + } } } -} |