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Add initial support for decoding NEON instructions in Thumb2 mode.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137236 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2011-08-10 19:01:10 +00:00
parent 0d886401b3
commit 8533ebad6f
3 changed files with 59 additions and 4 deletions
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54
lib/Target/ARM/Disassembler/ARMDisassembler.cpp
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@ -249,12 +249,32 @@ bool ARMDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
}
MI.clear();
result = decodeNEONInstruction32(MI, insn, Address, this);
result = decodeNEONDataInstruction32(MI, insn, Address, this);
if (result) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
return true;
}
MI.clear();
result = decodeNEONLoadStoreInstruction32(MI, insn, Address, this);
if (result) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
return true;
}
MI.clear();
result = decodeNEONDupInstruction32(MI, insn, Address, this);
if (result) {
Size = 4;
// Add a fake predicate operand, because we share these instruction
// definitions with Thumb2 where these instructions are predicable.
if (!DecodePredicateOperand(MI, 0xE, Address, this)) return false;
return true;
}
@ -433,6 +453,14 @@ bool ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
return true;
}
MI.clear();
result = decodeCommonInstruction32(MI, insn32, Address, this);
if (result) {
Size = 4;
AddThumbPredicate(MI);
return true;
}
MI.clear();
result = decodeVFPInstruction32(MI, insn32, Address, this);
if (result) {
@ -442,7 +470,29 @@ bool ThumbDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
}
MI.clear();
result = decodeCommonInstruction32(MI, insn32, Address, this);
if (fieldFromInstruction32(insn32, 24, 4) == 0xF) {
uint32_t NEONDataInsn = insn32;
NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
NEONDataInsn |= 0x12000000; // Set bits 28 and 25
result = decodeNEONDataInstruction32(MI, NEONDataInsn, Address, this);
if (result) {
Size = 4;
AddThumbPredicate(MI);
return true;
}
}
MI.clear();
result = decodeNEONLoadStoreInstruction32(MI, insn32, Address, this);
if (result) {
Size = 4;
AddThumbPredicate(MI);
return true;
}
MI.clear();
result = decodeNEONDupInstruction32(MI, insn32, Address, this);
if (result) {
Size = 4;
AddThumbPredicate(MI);