6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

[X86] AVX512: Add disassembler support for compressed displacement

Browse Source 
There are two parts here.  First is to modify tablegen to adjust the encoding
type ENCODING_RM with the scaling factor.

The second is to use the new encoding types to compute the correct
displacement in the decoder.

Fixes <rdar://problem/17608489>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adam Nemet
2014-07-17 17:04:56 +00:00
parent f166cc13e2
commit 6ae2941874
6 changed files with 80 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
utils/TableGen/X86RecognizableInstr.cpp
View File

@@ -205,6 +205,7 @@ RecognizableInstr::RecognizableInstr(DisassemblerTables &tables,
HasEVEX_B = Rec->getValueAsBit("hasEVEX_B");
IsCodeGenOnly = Rec->getValueAsBit("isCodeGenOnly");
ForceDisassemble = Rec->getValueAsBit("ForceDisassemble");
CD8_Scale = byteFromRec(Rec, "CD8_Scale");
Name = Rec->getName();
AsmString = Rec->getValueAsString("AsmString");
@@ -441,6 +442,16 @@ InstructionContext RecognizableInstr::insnContext() const {
return insnContext;
}
void RecognizableInstr::adjustOperandEncoding(OperandEncoding &encoding) {
// The scaling factor for AVX512 compressed displacement encoding is an
// instruction attribute. Adjust the ModRM encoding type to include the
// scale for compressed displacement.
if (encoding != ENCODING_RM || CD8_Scale == 0)
return;
encoding = (OperandEncoding)(encoding + Log2_32(CD8_Scale));
assert(encoding <= ENCODING_RM_CD64 && "Invalid CDisp scaling");
}
void RecognizableInstr::handleOperand(bool optional, unsigned &operandIndex,
unsigned &physicalOperandIndex,
unsigned &numPhysicalOperands,
@@ -464,8 +475,10 @@ void RecognizableInstr::handleOperand(bool optional, unsigned &operandIndex,
const std::string &typeName = (*Operands)[operandIndex].Rec->getName();
Spec->operands[operandIndex].encoding = encodingFromString(typeName,
OpSize);
OperandEncoding encoding = encodingFromString(typeName, OpSize);
// Adjust the encoding type for an operand based on the instruction.
adjustOperandEncoding(encoding);
Spec->operands[operandIndex].encoding = encoding;
Spec->operands[operandIndex].type = typeFromString(typeName,
HasREX_WPrefix, OpSize);