diff options
Diffstat (limited to 'src/arch/x86/predecoder.cc')
| -rw-r--r-- | src/arch/x86/predecoder.cc | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc index c99b0cfb0..5c98a1831 100644 --- a/src/arch/x86/predecoder.cc +++ b/src/arch/x86/predecoder.cc @@ -209,34 +209,38 @@ namespace X86ISA //Figure out the effective operand size. This can be overriden to //a fixed value at the decoder level. + int logOpSize; if(/*FIXME long mode*/1) { - if(emi.rex && emi.rex.w) - emi.opSize = 3; // 64 bit operand size + if(emi.rex.w) + logOpSize = 3; // 64 bit operand size else if(emi.legacy.op) - emi.opSize = 1; // 16 bit operand size + logOpSize = 1; // 16 bit operand size else - emi.opSize = 2; // 32 bit operand size + logOpSize = 2; // 32 bit operand size } else if(/*FIXME default 32*/1) { if(emi.legacy.op) - emi.opSize = 1; // 16 bit operand size + logOpSize = 1; // 16 bit operand size else - emi.opSize = 2; // 32 bit operand size + logOpSize = 2; // 32 bit operand size } else // 16 bit default operand size { if(emi.legacy.op) - emi.opSize = 2; // 32 bit operand size + logOpSize = 2; // 32 bit operand size else - emi.opSize = 1; // 16 bit operand size + logOpSize = 1; // 16 bit operand size } //Figure out how big of an immediate we'll retreive based //on the opcode. int immType = ImmediateType[emi.opcode.num - 1][nextByte]; - immediateSize = SizeTypeToSize[emi.opSize - 1][immType]; + 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]) { |