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Fix for loading of sbyte in ldc

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kudzu_cp 2010-08-23 15:50:42 +00:00
parent 69add597d4
commit ab03580e88
1 changed files with 9 additions and 1 deletions
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10
source2/IL2PCU/Cosmos.IL2CPU/ILReader.cs
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@ -289,7 +289,15 @@ namespace Cosmos.IL2CPU {
case OperandType.ShortInlineI:
switch (xOpCodeVal) {
case ILOpCode.Code.Ldc_I4_S:
xILOpCode = new ILOpCodes.OpInt(ILOpCode.Code.Ldc_I4, xOpPos, xPos + 1, xIL[xPos], xCurrentHandler);
// x = x & 0xFFFFFFFC;
// The above code produces:
// ldc.i4.s -4
// But its getting loaded into a I4, so we have to "extend" it
//
// First we have to cast it to a signed byte, so .NET will extend it properly to a uint.
sbyte xSVal = (sbyte)xIL[xPos];
uint xVal = (uint)xSVal;
xILOpCode = new ILOpCodes.OpInt(ILOpCode.Code.Ldc_I4, xOpPos, xPos + 1, xVal, xCurrentHandler);
break;
default:
xILOpCode = new ILOpCodes.OpInt(xOpCodeVal, xOpPos, xPos + 1, xIL[xPos], xCurrentHandler);