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Fixed problem of nasm defaulting all conditional branches to short which often generates an error. Now all jumps are near.

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This commit is contained in:
kudzu_cp 2008-09-17 00:45:25 +00:00
parent 1e9de4bb90
commit 65381e63a5
1 changed files with 13 additions and 7 deletions
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20
source/Indy.IL2CPU.Assembler.X86/JumpBase.cs
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@ -8,13 +8,19 @@ namespace Indy.IL2CPU.Assembler.X86 {
public readonly string Address;
protected JumpBase(string aAddress) {
Address = aAddress;
if (Address.StartsWith(".")) {
//string xPrefix = (from item in Assembler.CurrentInstance.Instructions
// where !Label.GetLabel(item).StartsWith(".")
// select Label.GetLabel(item)).Last();
string xPrefix = Label.LastFullLabel;
Address = xPrefix + "__DOT__" + Address.Substring(1);
if (aAddress.StartsWith(".")) {
aAddress = Label.LastFullLabel + "__DOT__" + aAddress.Substring(1);
}
// If it has a :, then its a far call so dont add near
if (aAddress.Contains(':')) {
Address = aAddress;
} else {
// Nasm by default issues conditional branches as short
// and we often exceed the distance
// For now we go for simplicity. Later when we optimize and have
// our own assembler, we should consider using short jumps
// if they are faster
Address = "near " + aAddress;
}
}
}