Add instruction encodings / disassembly support for l6r instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173288 91177308-0d34-0410-b5e6-96231b3b80d8
dstoza · Jan 23, 2013 · 9e6a5a3 · 9e6a5a3
1 parent b09350d
commit 9e6a5a3
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Showing 4 changed files with 39 additions and 6 deletions.
diff --git a/lib/Target/XCore/Disassembler/XCoreDisassembler.cpp b/lib/Target/XCore/Disassembler/XCoreDisassembler.cpp
@@ -170,6 +170,11 @@ static DecodeStatus DecodeL2RUSBitpInstruction(MCInst &Inst,
                                                uint64_t Address,
                                                const void *Decoder);
 
+static DecodeStatus DecodeL6RInstruction(MCInst &Inst,
+                                         unsigned Insn,
+                                         uint64_t Address,
+                                         const void *Decoder);
+
 #include "XCoreGenDisassemblerTables.inc"
 
 static DecodeStatus DecodeGRRegsRegisterClass(MCInst &Inst,
@@ -572,6 +577,26 @@ DecodeL2RUSBitpInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
   return S;
 }
 
+static DecodeStatus
+DecodeL6RInstruction(MCInst &Inst, unsigned Insn, uint64_t Address,
+                     const void *Decoder) {
+  unsigned Op1, Op2, Op3, Op4, Op5, Op6;
+  DecodeStatus S =
+    Decode3OpInstruction(fieldFromInstruction(Insn, 0, 16), Op1, Op2, Op3);
+  if (S != MCDisassembler::Success)
+    return S;
+  S = Decode3OpInstruction(fieldFromInstruction(Insn, 16, 16), Op4, Op5, Op6);
+  if (S != MCDisassembler::Success)
+    return S;
+  DecodeGRRegsRegisterClass(Inst, Op1, Address, Decoder);
+  DecodeGRRegsRegisterClass(Inst, Op4, Address, Decoder);
+  DecodeGRRegsRegisterClass(Inst, Op2, Address, Decoder);
+  DecodeGRRegsRegisterClass(Inst, Op3, Address, Decoder);
+  DecodeGRRegsRegisterClass(Inst, Op5, Address, Decoder);
+  DecodeGRRegsRegisterClass(Inst, Op6, Address, Decoder);
+  return S;
+}
+
 MCDisassembler::DecodeStatus
 XCoreDisassembler::getInstruction(MCInst &instr,
                                   uint64_t &Size,

diff --git a/lib/Target/XCore/XCoreInstrFormats.td b/lib/Target/XCore/XCoreInstrFormats.td
@@ -226,6 +226,10 @@ class _L5R<dag outs, dag ins, string asmstr, list<dag> pattern>
     : InstXCore<4, outs, ins, asmstr, pattern> {
 }
 
-class _L6R<dag outs, dag ins, string asmstr, list<dag> pattern>
+class _FL6R<bits<5> opc, dag outs, dag ins, string asmstr, list<dag> pattern>
     : InstXCore<4, outs, ins, asmstr, pattern> {
+  let Inst{31-27} = opc;
+  let Inst{15-11} = 0b11111;
+
+  let DecoderMethod = "DecodeL6RInstruction";
 }
diff --git a/lib/Target/XCore/XCoreInstrInfo.td b/lib/Target/XCore/XCoreInstrInfo.td
@@ -502,11 +502,10 @@ def LDIV_l5r : _L5R<(outs GRRegs:$dst1, GRRegs:$dst2),
 
 // Six operand long
 
-def LMUL_l6r : _L6R<(outs GRRegs:$dst1, GRRegs:$dst2),
-                    (ins GRRegs:$src1, GRRegs:$src2, GRRegs:$src3,
-                      GRRegs:$src4),
-                    "lmul $dst1, $dst2, $src1, $src2, $src3, $src4",
-                    []>;
+def LMUL_l6r : _FL6R<
+  0b00000, (outs GRRegs:$dst1, GRRegs:$dst2),
+  (ins GRRegs:$src1, GRRegs:$src2, GRRegs:$src3, GRRegs:$src4),
+  "lmul $dst1, $dst2, $src1, $src2, $src3, $src4", []>;
 
 // Register - U6
 

diff --git a/test/MC/Disassembler/XCore/xcore.txt b/test/MC/Disassembler/XCore/xcore.txt
@@ -456,3 +456,8 @@
 
 # CHECK: bl 38631
 0x25 0xf0 0xe7 0xd2
+
+# l6r instructions
+
+# CHECK: lmul r11, r0, r2, r5, r8, r10
+0xf9 0xfa 0x02 0x06