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Calculate the correct address size.

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--HG--
extra : convert_revision : 6bd9d5a01ba6600781e3678e0403dca524fb2cba
This commit is contained in:
Gabe Black 2007-07-17 20:54:55 -07:00
parent e524240d68
commit 85f32920fb
1 changed files with 31 additions and 3 deletions
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34
src/arch/x86/predecoder.cc
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@ -235,14 +235,42 @@ namespace X86ISA
logOpSize = 1; // 16 bit operand size
}
//Set the actual op size
emi.opSize = 1 << logOpSize;
//Figure out the effective address size. This can be overriden to
//a fixed value at the decoder level.
int logAddrSize;
if(/*FIXME 64-bit mode*/1)
{
if(emi.legacy.addr)
logAddrSize = 2; // 32 bit address size
else
logAddrSize = 3; // 64 bit address size
}
else if(/*FIXME default 32*/1)
{
if(emi.legacy.addr)
logAddrSize = 1; // 16 bit address size
else
logAddrSize = 2; // 32 bit address size
}
else // 16 bit default operand size
{
if(emi.legacy.addr)
logAddrSize = 2; // 32 bit address size
else
logAddrSize = 1; // 16 bit address size
}
//Set the actual address size
emi.addrSize = 1 << logAddrSize;
//Figure out how big of an immediate we'll retreive based
//on the opcode.
int immType = ImmediateType[emi.opcode.num - 1][nextByte];
immediateSize = SizeTypeToSize[logOpSize - 1][immType];
//Set the actual op size
emi.opSize = 1 << logOpSize;
//Determine what to expect next
if (UsesModRM[emi.opcode.num - 1][nextByte]) {
nextState = ModRMState;