Adding support for instructions mfc0, mfc2, mtc0, mtc2

move from and to coprocessors 0 and 2.

Contributer: Vladimir Medic

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165351 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsInstrFormats.td b/lib/Target/Mips/MipsInstrFormats.td
index 5cc95a1f5bbcc7d313d2942891974540e6ea1551..1ecbdc2474b30c5e9d12d8c92d4b560848e568fe 100644 (file)
--- a/lib/Target/Mips/MipsInstrFormats.td
+++ b/lib/Target/Mips/MipsInstrFormats.td
@@ -171,6 +171,27 @@ class FJ<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern,
   let Inst{25-0} = addr;
 }
 
+ //===----------------------------------------------------------------------===//
+// MFC instruction class in Mips : <|op|mf|rt|rd|0000000|sel|>
+//===----------------------------------------------------------------------===//
+class MFC3OP<bits<6> op, bits<5> _mfmt, dag outs, dag ins, string asmstr>:
+  InstSE<outs, ins, asmstr, [], NoItinerary, FrmFR>
+{
+  bits<5> mfmt;
+  bits<5> rt;
+  bits<5> rd;
+  bits<3> sel;
+
+  let Opcode = op;
+  let mfmt = _mfmt;
+
+  let Inst{25-21} = mfmt;
+  let Inst{20-16} = rt;
+  let Inst{15-11} = rd;
+  let Inst{10-3}  = 0;
+  let Inst{2-0}   = sel;
+}
+
 //===----------------------------------------------------------------------===//
 //
 //  FLOATING POINT INSTRUCTION FORMATS

diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index 57615f8db5ef47d50395e69301862b030d8d4d83..a32b8a1c09cd307124df7a7b9dfada28e21a2eb0 100644 (file)
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -296,6 +296,23 @@ def addr :
 // Instructions specific format
 //===----------------------------------------------------------------------===//
 
+/// Move Control Registers From/To CPU Registers
+def MFC0_3OP  : MFC3OP<0x10, 0, (outs CPURegs:$rt),
+                       (ins CPURegs:$rd, uimm16:$sel),"mfc0\t$rt, $rd, $sel">;
+def : InstAlias<"mfc0 $rt, $rd", (MFC0_3OP CPURegs:$rt, CPURegs:$rd, 0)>;
+
+def MTC0_3OP  : MFC3OP<0x10, 4, (outs CPURegs:$rd, uimm16:$sel),
+                       (ins CPURegs:$rt),"mtc0\t$rt, $rd, $sel">;
+def : InstAlias<"mtc0 $rt, $rd", (MTC0_3OP CPURegs:$rd, 0, CPURegs:$rt)>;
+
+def MFC2_3OP  : MFC3OP<0x12, 0, (outs CPURegs:$rt),
+                       (ins CPURegs:$rd, uimm16:$sel),"mfc2\t$rt, $rd, $sel">;
+def : InstAlias<"mfc2 $rt, $rd", (MFC2_3OP CPURegs:$rt, CPURegs:$rd, 0)>;
+
+def MTC2_3OP  : MFC3OP<0x12, 4, (outs CPURegs:$rd, uimm16:$sel),
+                       (ins CPURegs:$rt),"mtc2\t$rt, $rd, $sel">;
+def : InstAlias<"mtc2 $rt, $rd", (MTC2_3OP CPURegs:$rd, 0, CPURegs:$rt)>;
+
 // Arithmetic and logical instructions with 3 register operands.
 class ArithLogicR<bits<6> op, bits<6> func, string instr_asm, SDNode OpNode,
                   InstrItinClass itin, RegisterClass RC, bit isComm = 0>:

diff --git a/test/MC/Mips/mips-fpu-instructions.s b/test/MC/Mips/mips-fpu-instructions.s
index ce8024d45b5b1a1aa759a839d9f0ee480e274b7c..a126c6f7188cd5128f9e65fd2d584111cc6dbab8 100644 (file)
--- a/test/MC/Mips/mips-fpu-instructions.s
+++ b/test/MC/Mips/mips-fpu-instructions.s
@@ -149,6 +149,14 @@
 # CHECK:  mthi    $7                   # encoding: [0x11,0x00,0xe0,0x00]
 # CHECK:  mtlo    $7                   # encoding: [0x13,0x00,0xe0,0x00]
 # CHECK:  swc1    $f9, 9158($7)        # encoding: [0xc6,0x23,0xe9,0xe4]
+# CHECK:  mfc0    $6, $7, 0               # encoding: [0x00,0x38,0x06,0x40]
+# CHECK:  mtc0    $9, $8, 0               # encoding: [0x00,0x40,0x89,0x40]
+# CHECK:  mfc2    $5, $7, 0               # encoding: [0x00,0x38,0x05,0x48]
+# CHECK:  mtc2    $9, $4, 0               # encoding: [0x00,0x20,0x89,0x48]
+# CHECK:  mfc0    $6, $7, 2               # encoding: [0x02,0x38,0x06,0x40]
+# CHECK:  mtc0    $9, $8, 3               # encoding: [0x03,0x40,0x89,0x40]
+# CHECK:  mfc2    $5, $7, 4               # encoding: [0x04,0x38,0x05,0x48]
+# CHECK:  mtc2    $9, $4, 5               # encoding: [0x05,0x20,0x89,0x48]
 
    cfc1    $a2,$0
    mfc1    $a2,$f7
@@ -160,3 +168,11 @@
    mthi    $a3
    mtlo    $a3
    swc1    $f9,9158($a3)
+   mfc0    $6, $7
+   mtc0    $9, $8
+   mfc2    $5, $7
+   mtc2    $9, $4
+   mfc0    $6, $7, 2
+   mtc0    $9, $8, 3
+   mfc2    $5, $7, 4
+   mtc2    $9, $4, 5