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* Generalize tail continues * Fix DecodeBasicBlock `Next` and `Branch` would be null, which is not the state expected by the branch instructions. They end up branching or falling into a block which is never populated by the `Translator`. This causes an assert to be fired when building the CFG. * Clean up Decode overloads * Do not synchronize when branching into exit block If we're branching into an exit block, that exit block will tail continue into another translation which already has a synchronization. * Remove A32 predicate tail continue If `block` is not an exit block then the `block.Next` must exist (as per the last instruction of `block`). * Throw if decoded 0 blocks Address gdkchan's feedback * Rebuild block list instead of setting to null Address gdkchan's feedback
102 lines
2.4 KiB
C#
102 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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namespace ARMeilleure.Decoders
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{
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class Block
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{
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public ulong Address { get; set; }
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public ulong EndAddress { get; set; }
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public Block Next { get; set; }
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public Block Branch { get; set; }
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public bool TailCall { get; set; }
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public bool Exit { get; set; }
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public List<OpCode> OpCodes { get; private set; }
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public Block()
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{
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OpCodes = new List<OpCode>();
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}
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public Block(ulong address) : this()
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{
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Address = address;
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}
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public void Split(Block rightBlock)
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{
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int splitIndex = BinarySearch(OpCodes, rightBlock.Address);
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if (OpCodes[splitIndex].Address < rightBlock.Address)
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{
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splitIndex++;
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}
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int splitCount = OpCodes.Count - splitIndex;
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if (splitCount <= 0)
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{
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throw new ArgumentException("Can't split at right block address.");
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}
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rightBlock.EndAddress = EndAddress;
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rightBlock.Next = Next;
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rightBlock.Branch = Branch;
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rightBlock.OpCodes.AddRange(OpCodes.GetRange(splitIndex, splitCount));
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EndAddress = rightBlock.Address;
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Next = rightBlock;
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Branch = null;
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OpCodes.RemoveRange(splitIndex, splitCount);
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}
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private static int BinarySearch(List<OpCode> opCodes, ulong address)
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{
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int left = 0;
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int middle = 0;
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int right = opCodes.Count - 1;
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while (left <= right)
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{
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int size = right - left;
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middle = left + (size >> 1);
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OpCode opCode = opCodes[middle];
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if (address == (ulong)opCode.Address)
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{
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break;
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}
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if (address < (ulong)opCode.Address)
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{
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right = middle - 1;
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}
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else
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{
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left = middle + 1;
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}
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}
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return middle;
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}
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public OpCode GetLastOp()
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{
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if (OpCodes.Count > 0)
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{
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return OpCodes[OpCodes.Count - 1];
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}
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return null;
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}
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}
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} |