[mips][microMIPS] Implement BREAK16 and SDBBP16 instructions

Patch by Radovan Obradovic. Differential Revision: http://reviews.llvm.org/D5048 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222900 91177308-0d34-0410-b5e6-96231b3b80d8
bgamari · Nov 27, 2014 · 13fbabb · 13fbabb
1 parent 68de93c
commit 13fbabb
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diff --git a/lib/Target/Mips/MicroMipsInstrFormats.td b/lib/Target/Mips/MicroMipsInstrFormats.td
@@ -207,6 +207,15 @@ class ADDIUR1SP_FM_MM16 {
   let Inst{0}     = 1;
 }
 
+class BRKSDBBP16_FM_MM<bits<6> op> {
+  bits<4> code_;
+  bits<16> Inst;
+
+  let Inst{15-10} = 0x11;
+  let Inst{9-4}   = op;
+  let Inst{3-0}   = code_;
+}
+
 //===----------------------------------------------------------------------===//
 // MicroMIPS 32-bit Instruction Formats
 //===----------------------------------------------------------------------===//

diff --git a/lib/Target/Mips/MicroMipsInstrInfo.td b/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -296,6 +296,12 @@ class JumpRegCMM16<string opstr, RegisterOperand RO> :
   let isIndirectBranch = 1;
 }
 
+// Break16 and Sdbbp16
+class BrkSdbbp16MM<string opstr> :
+  MicroMipsInst16<(outs), (ins uimm4:$code_),
+                  !strconcat(opstr, "\t$code_"),
+                  [], NoItinerary, FrmOther>;
+
 // MicroMIPS Jump and Link (Call) - Short Delay Slot
 let isCall = 1, hasDelaySlot = 1, Defs = [RA] in {
   class JumpLinkMM<string opstr, DAGOperand opnd> :
@@ -392,6 +398,8 @@ def JALRS16_MM : JumpLinkRegSMM16<"jalrs16", GPR32Opnd>, JALR_FM_MM16<0x0f>;
 def JRC16_MM : JumpRegCMM16<"jrc", GPR32Opnd>, JALR_FM_MM16<0x0d>;
 def JRADDIUSP : JumpRAddiuStackMM16, JRADDIUSP_FM_MM16<0x18>;
 def JR16_MM : JumpRegMM16<"jr16", GPR32Opnd>, JALR_FM_MM16<0x0c>;
+def BREAK16_MM : BrkSdbbp16MM<"break16">, BRKSDBBP16_FM_MM<0x28>;
+def SDBBP16_MM : BrkSdbbp16MM<"sdbbp16">, BRKSDBBP16_FM_MM<0x2C>;
 
 class WaitMM<string opstr> :
   InstSE<(outs), (ins uimm10:$code_), !strconcat(opstr, "\t$code_"), [],

diff --git a/test/MC/Mips/micromips-16-bit-instructions.s b/test/MC/Mips/micromips-16-bit-instructions.s
@@ -43,6 +43,8 @@
 # CHECK-EL: move    $zero, $zero    # encoding: [0x00,0x0c]
 # CHECK-EL: jr16    $9              # encoding: [0x89,0x45]
 # CHECK-EL: nop                     # encoding: [0x00,0x00,0x00,0x00]
+# CHECK-EL: break16 8               # encoding: [0x88,0x46]
+# CHECK-EL: sdbbp16 14              # encoding: [0xce,0x46]
 #------------------------------------------------------------------------------
 # Big endian
 #------------------------------------------------------------------------------
@@ -80,6 +82,8 @@
 # CHECK-EB: move    $zero, $zero    # encoding: [0x0c,0x00]
 # CHECK-EB: jr16    $9              # encoding: [0x45,0x89]
 # CHECK-EB: nop                     # encoding: [0x00,0x00,0x00,0x00]
+# CHECK-EB: break16 8               # encoding: [0x46,0x88]
+# CHECK-EB: sdbbp16 14              # encoding: [0x46,0xce]
 
     addu16  $6, $17, $4
     subu16  $5, $16, $3
@@ -113,3 +117,5 @@
     jraddiusp 20
     jalrs16 $9
     jr16    $9
+    break16 8
+    sdbbp16 14