MIPS[64]: Add branch poisoning for FP compare operations

Change-Id: Ie52c6793736f38d1ab1f323b856f36587c46e7f9
Reviewed-on: https://chromium-review.googlesource.com/1059773Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#53255}

src/compiler/mips/code-generator-mips.cc

@@ -2909,7 +2909,19 @@ void CodeGenerator::AssembleBranchPoisoning(FlagsCondition condition,
       }
     }
       return;
+    case kMipsCmpS:
+    case kMipsCmpD: {
+      bool predicate;
+      FlagsConditionToConditionCmpFPU(predicate, condition);
+      if (predicate) {
+        __ LoadZeroIfFPUCondition(kSpeculationPoisonRegister);
+      } else {
+        __ LoadZeroIfNotFPUCondition(kSpeculationPoisonRegister);
+      }
+    }
+      return;
     default:
+      UNREACHABLE();
       break;
   }
 }

src/compiler/mips64/code-generator-mips64.cc

@@ -3149,7 +3149,19 @@ void CodeGenerator::AssembleBranchPoisoning(FlagsCondition condition,
       }
     }
       return;
+    case kMips64CmpS:
+    case kMips64CmpD: {
+      bool predicate;
+      FlagsConditionToConditionCmpFPU(predicate, condition);
+      if (predicate) {
+        __ LoadZeroIfFPUCondition(kSpeculationPoisonRegister);
+      } else {
+        __ LoadZeroIfNotFPUCondition(kSpeculationPoisonRegister);
+      }
+    }
+      return;
     default:
+      UNREACHABLE();
       break;
   }
 }