MIPS: [turbofan] Unify Math.floor / Math.ceil optimization.

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

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index e6155aa149995dbf4ced457929184ec0c09f2ecb..e345352747c9c3b06385aee0549309a8a1bb0d68 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -637,18 +637,18 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       __ MovFromFloatResult(i.OutputDoubleRegister());
       break;
     }
-    case kMips64Float64Floor: {
+    case kMips64Float64RoundDown: {
       ASSEMBLE_ROUND_DOUBLE_TO_DOUBLE(floor_l_d, Floor);
       break;
     }
-    case kMips64Float64Ceil: {
-      ASSEMBLE_ROUND_DOUBLE_TO_DOUBLE(ceil_l_d, Ceil);
-      break;
-    }
     case kMips64Float64RoundTruncate: {
       ASSEMBLE_ROUND_DOUBLE_TO_DOUBLE(trunc_l_d, Truncate);
       break;
     }
+    case kMips64Float64RoundUp: {
+      ASSEMBLE_ROUND_DOUBLE_TO_DOUBLE(ceil_l_d, Ceil);
+      break;
+    }
     case kMips64SqrtD: {
       __ sqrt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
       break;