This patch implements wait instruction for mips. Examples are added in test files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188537 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsInstrInfo.td b/lib/Target/Mips/MipsInstrInfo.td
index 1753207..3d7ba00 100644 (file)
--- a/lib/Target/Mips/MipsInstrInfo.td
+++ b/lib/Target/Mips/MipsInstrInfo.td
@@ -673,6 +673,15 @@ class DEI_FT<string opstr, RegisterOperand RO> :
   InstSE<(outs RO:$rt), (ins),
          !strconcat(opstr, "\t$rt"), [], NoItinerary, FrmOther>;
 
+// Wait
+class WAIT_FT<string opstr> :
+  InstSE<(outs), (ins), opstr, [], NoItinerary, FrmOther> {
+  let Inst{31-26} = 0x10;
+  let Inst{25}    = 1;
+  let Inst{24-6}  = 0;
+  let Inst{5-0}   = 0x20;
+}
+
 // Sync
 let hasSideEffects = 1 in
 class SYNC_FT :
@@ -990,6 +999,8 @@ def DERET : ER_FT<"deret">, ER_FM<0x1f>;
 def EI : DEI_FT<"ei", GPR32Opnd>, EI_FM<1>;
 def DI : DEI_FT<"di", GPR32Opnd>, EI_FM<0>;
 
+def WAIT : WAIT_FT<"wait">;
+
 /// Load-linked, Store-conditional
 let Predicates = [NotN64, HasStdEnc] in {
   def LL : LLBase<"ll", GPR32Opnd, mem>, LW_FM<0x30>;

diff --git a/test/MC/Mips/mips-control-instructions.s b/test/MC/Mips/mips-control-instructions.s
index 90d479d..825f349 100644 (file)
--- a/test/MC/Mips/mips-control-instructions.s
+++ b/test/MC/Mips/mips-control-instructions.s
@@ -16,6 +16,7 @@
 # CHECK32:    ei                         # encoding: [0x41,0x60,0x60,0x20]
 # CHECK32:    ei                         # encoding: [0x41,0x60,0x60,0x20]
 # CHECK32:    ei      $10                # encoding: [0x41,0x6a,0x60,0x20]
+# CHECK32:    wait                       # encoding: [0x42,0x00,0x00,0x20]
 
 # CHECK64:    break                      # encoding: [0x00,0x00,0x00,0x0d]
 # CHECK64:    break   7, 0               # encoding: [0x00,0x07,0x00,0x0d]
@@ -30,6 +31,7 @@
 # CHECK64:    ei                         # encoding: [0x41,0x60,0x60,0x20]
 # CHECK64:    ei                         # encoding: [0x41,0x60,0x60,0x20]
 # CHECK64:    ei      $10                # encoding: [0x41,0x6a,0x60,0x20]
+# CHECK64:    wait                       # encoding: [0x42,0x00,0x00,0x20]
     break
     break 7
     break 7,5
@@ -44,3 +46,5 @@
     ei
     ei  $0
     ei  $10
+
+    wait