MIPS: [turbofan] Properly implement Float64/32 Min/Max instructions.

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

Index: src/compiler/mips/code-generator-mips.cc
diff --git a/src/compiler/mips/code-generator-mips.cc b/src/compiler/mips/code-generator-mips.cc
index a581ca5c3ae02a6eaa946e3d9258b2aff81a1739..578d211c76a94ab7ac8c8e819eb1e73fe75768eb 100644
--- a/src/compiler/mips/code-generator-mips.cc
+++ b/src/compiler/mips/code-generator-mips.cc
@@ -721,6 +721,62 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       ASSEMBLE_ROUND_DOUBLE_TO_DOUBLE(ceil_l_d, Ceil);
       break;
     }
+    case kMipsFloat64Max: {
+      // (b < a) ? a : b
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ cmp_d(OLT, i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+        __ sel_d(i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+      } else {
+        __ c_d(OLT, i.InputDoubleRegister(0), i.InputDoubleRegister(1));
+        // Left operand is result, passthrough if false.
+        __ movt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(1));
+      }
+      break;
+    }
+    case kMipsFloat64Min: {
+      // (a < b) ? a : b
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ cmp_d(OLT, i.OutputDoubleRegister(), i.InputDoubleRegister(0),
+                 i.InputDoubleRegister(1));
+        __ sel_d(i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+      } else {
+        __ c_d(OLT, i.InputDoubleRegister(1), i.InputDoubleRegister(0));
+        // Right operand is result, passthrough if false.
+        __ movt_d(i.OutputDoubleRegister(), i.InputDoubleRegister(1));
+      }
+      break;
+    }
+    case kMipsFloat32Max: {
+      // (b < a) ? a : b
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ cmp_s(OLT, i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+        __ sel_s(i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+      } else {
+        __ c_s(OLT, i.InputDoubleRegister(0), i.InputDoubleRegister(1));
+        // Left operand is result, passthrough if false.
+        __ movt_s(i.OutputDoubleRegister(), i.InputDoubleRegister(1));
+      }
+      break;
+    }
+    case kMipsFloat32Min: {
+      // (a < b) ? a : b
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ cmp_s(OLT, i.OutputDoubleRegister(), i.InputDoubleRegister(0),
+                 i.InputDoubleRegister(1));
+        __ sel_s(i.OutputDoubleRegister(), i.InputDoubleRegister(1),
+                 i.InputDoubleRegister(0));
+      } else {
+        __ c_s(OLT, i.InputDoubleRegister(1), i.InputDoubleRegister(0));
+        // Right operand is result, passthrough if false.
+        __ movt_s(i.OutputDoubleRegister(), i.InputDoubleRegister(1));
+      }
+      break;
+    }
     case kMipsCvtSD: {
       __ cvt_s_d(i.OutputSingleRegister(), i.InputDoubleRegister(0));
       break;