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Feature: long constant fusion for Sparc disassembly.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| #region License | ||
| /* | ||
| * Copyright (C) 1999-2024 John Källén. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 or or (at your option) | ||
| * any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful or | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; see the file COPYING. If not or write to | ||
| * the Free Software Foundation or 675 Mass Ave or Cambridge or MA 02139 or USA. | ||
| */ | ||
| #endregion | ||
|
|
||
| using Reko.Core; | ||
| using Reko.Core.Collections; | ||
| using Reko.Core.Expressions; | ||
| using Reko.Core.Machine; | ||
| using System; | ||
| using System.Collections; | ||
| using System.Collections.Generic; | ||
| using System.Security.Cryptography; | ||
|
|
||
| namespace Reko.Arch.Sparc | ||
| { | ||
| public class LongConstantFuser : IEnumerable<MachineInstruction> | ||
| { | ||
| private readonly IEnumerable<SparcInstruction> dasm; | ||
|
|
||
| public LongConstantFuser(IEnumerable<SparcInstruction> dasm) | ||
| { | ||
| this.dasm = dasm; | ||
| } | ||
|
|
||
| public IEnumerator<MachineInstruction> GetEnumerator() | ||
| { | ||
| ImmediateOperand immLo; | ||
| var e = new LookaheadEnumerator<SparcInstruction>(dasm); | ||
| while (e.MoveNext()) | ||
| { | ||
| var instrHi = e.Current; | ||
| switch (instrHi.Mnemonic) | ||
| { | ||
| case Mnemonic.sethi: | ||
| if (((RegisterStorage) instrHi.Operands[1]).Number == 0 || | ||
| !e.TryPeek(1, out var instrLo)) | ||
| { | ||
| break; | ||
| } | ||
| if (instrLo.Mnemonic == Mnemonic.add) | ||
| { | ||
| if (instrHi.Operands[1] == instrLo.Operands[0]) | ||
| { | ||
| // Mutate the sethi and add | ||
| var immHi = (ImmediateOperand) instrHi.Operands[0]; | ||
| immLo = (ImmediateOperand) instrLo.Operands[1]; | ||
| var longConst = new ImmediateOperand( | ||
| Constant.Create( | ||
| instrHi.Operands[0].Width, | ||
| (uint) ((immHi.Value.ToInt32() << 16) | | ||
| immLo.Value.ToInt32()))); | ||
| var hiOp = new SliceOperand(SliceType.Hi, immHi, longConst); | ||
| var loOp = new SliceOperand(SliceType.Lo, immLo, longConst); | ||
| instrHi.Operands[0] = hiOp; | ||
| instrLo.Operands[1] = loOp; | ||
| } | ||
| } | ||
| else if (IsMemoryLoadInstruction(instrLo.Mnemonic)) | ||
| { | ||
| if (instrLo.Operands[0] is MemoryOperand memOp && | ||
| instrHi.Operands[1] == memOp.Base && | ||
| memOp.Offset is ImmediateOperand imm) | ||
| { | ||
| var immHi = (ImmediateOperand) instrHi.Operands[1]; | ||
| immLo = imm; | ||
| // Mutate the addis/oris and the memory operand | ||
| var longConst = new ImmediateOperand( | ||
| Constant.Create( | ||
| instrHi.Operands[0].Width, | ||
| (immHi.Value.ToInt32() << 16) + | ||
| immLo.Value.ToInt32())); | ||
| var hiOp = new SliceOperand(SliceType.Hi, immHi, longConst); | ||
| var loOp = new SliceOperand(SliceType.Lo, immLo, longConst); | ||
| instrHi.Operands[0] = hiOp; | ||
| memOp.Offset = loOp; | ||
| } | ||
| } | ||
| else if (IsMemoryStoreInstruction(instrLo.Mnemonic) && | ||
| instrLo.Operands[1] is MemoryOperand memOp) | ||
| { | ||
| if (instrHi.Operands[1] == memOp.Base && | ||
| memOp.Offset is ImmediateOperand imm) | ||
| { | ||
| var immHi = (ImmediateOperand) instrHi.Operands[1]; | ||
| immLo = imm; | ||
| // Mutate the addis/oris and the memory operand | ||
| var longConst = new ImmediateOperand( | ||
| Constant.Create( | ||
| instrHi.Operands[0].Width, | ||
| (immHi.Value.ToInt32() << 16) + | ||
| immLo.Value.ToInt32())); | ||
| var hiOp = new SliceOperand(SliceType.Hi, immHi, longConst); | ||
| var loOp = new SliceOperand(SliceType.Lo, immLo, longConst); | ||
| instrHi.Operands[1] = hiOp; | ||
| memOp.Offset = loOp; | ||
| } | ||
| } | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| yield return e.Current; | ||
| } | ||
| } | ||
|
|
||
| IEnumerator IEnumerable.GetEnumerator() => GetEnumerator(); | ||
|
|
||
| private static bool IsMemoryLoadInstruction(Mnemonic mnemonic) | ||
| { | ||
| return mnemonic switch | ||
| { | ||
| Mnemonic.ld or | ||
| Mnemonic.ldd or | ||
| Mnemonic.ldf or | ||
| Mnemonic.lddf or | ||
| Mnemonic.ldsb or | ||
| Mnemonic.ldub or | ||
| Mnemonic.ldsh or | ||
| Mnemonic.lduh or | ||
| Mnemonic.ldsw or | ||
| Mnemonic.lduw or | ||
| _ => false | ||
| }; | ||
| } | ||
|
|
||
| private static bool IsMemoryStoreInstruction(Mnemonic mnemonic) | ||
| { | ||
| return mnemonic switch | ||
| { | ||
| Mnemonic.st or | ||
| Mnemonic.std or | ||
| Mnemonic.stb or | ||
| Mnemonic.sth or | ||
| Mnemonic.stf or | ||
| Mnemonic.stdf or | ||
| _ => false | ||
| }; | ||
| } | ||
|
|
||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| #region License | ||
| /* | ||
| * Copyright (C) 1999-2024 John Källén. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2, or (at your option) | ||
| * any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program; see the file COPYING. If not, write to | ||
| * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| */ | ||
| #endregion | ||
|
|
||
| using Reko.Core.Machine; | ||
| using System.Collections.Generic; | ||
|
|
||
| namespace Reko.Arch.Sparc; | ||
|
|
||
| /// <summary> | ||
| /// Used to represent sliced immediate values in | ||
| /// sethi instructions. | ||
| /// </summary> | ||
| public class SliceOperand : AbstractMachineOperand | ||
| { | ||
| public SliceOperand( | ||
| SliceType slice, | ||
| ImmediateOperand value, | ||
| MachineOperand inferredValue) | ||
| : base(value.Width) | ||
| { | ||
| this.Slice = slice; | ||
| this.Value = value; | ||
| this.InferredValue = inferredValue; | ||
| } | ||
|
|
||
| public SliceType Slice { get; } | ||
| public ImmediateOperand Value { get; } | ||
| public MachineOperand InferredValue { get; } | ||
|
|
||
| protected override void DoRender(MachineInstructionRenderer renderer, MachineInstructionRendererOptions options) | ||
| { | ||
| renderer.WriteString(Slice.Format()); | ||
| renderer.WriteChar('('); | ||
| InferredValue.Render(renderer, options); | ||
| renderer.WriteChar(')'); | ||
| } | ||
| } | ||
|
|
||
| public enum SliceType | ||
| { | ||
| None, | ||
|
|
||
| Hi, | ||
| Lo, | ||
| } | ||
|
|
||
| public static class SliceTypeExtensions | ||
| { | ||
| private static readonly Dictionary<SliceType, string> strFormats = new() | ||
| { | ||
| { SliceType.Hi, "%hi" }, | ||
| { SliceType.Lo, "%lo" }, | ||
| }; | ||
|
|
||
| public static string Format(this SliceType type) | ||
| { | ||
| return strFormats[type]; | ||
| } | ||
| } |
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