[turbofan] Add Float32(Max|Min) machine operators.

test/cctest/compiler/test-run-machops.cc

Index: test/cctest/compiler/test-run-machops.cc
diff --git a/test/cctest/compiler/test-run-machops.cc b/test/cctest/compiler/test-run-machops.cc
index 0c1175051d7c41f5626ee2fab63f13ea2e9e942e..60473380858f8ee73367fc167f79b5dbe4075ac0 100644
--- a/test/cctest/compiler/test-run-machops.cc
+++ b/test/cctest/compiler/test-run-machops.cc
@@ -3790,6 +3790,47 @@ TEST(RunFloat64MinP) {
   }
 }
 
+namespace {
+
+float fmax(float x, float y) {

[titzer, 2016/08/17 11:26:09]

Can you move this to a common place so that it can be shared? Also the double
version.

[ahaas, 2016/08/18 07:13:20]

Done.

+  if (std::isnan(x)) return x;
+  if (std::isnan(y)) return y;
+  if (std::signbit(x) < std::signbit(y)) return x;
+  return std::max(x, y);
+}
+
+float fmin(float x, float y) {
+  if (std::isnan(x)) return x;
+  if (std::isnan(y)) return y;
+  if (std::signbit(x) < std::signbit(y)) return y;
+  return std::min(x, y);
+}
+
+}  // namespace
+
+TEST(RunFloat32Max) {
+  RawMachineAssemblerTester<int32_t> m;
+  Float32BinopTester bt(&m);
+  bt.AddReturn(m.Float32Max(bt.param0, bt.param1));
+
+  FOR_FLOAT32_INPUTS(pl) {
+    FOR_FLOAT32_INPUTS(pr) {
+      CHECK_FLOAT_EQ(fmax(*pl, *pr), bt.call(*pl, *pr));
+    }
+  }
+}
+
+TEST(RunFloat32Min) {
+  RawMachineAssemblerTester<int32_t> m;
+  Float32BinopTester bt(&m);
+  bt.AddReturn(m.Float32Min(bt.param0, bt.param1));
+
+  FOR_FLOAT32_INPUTS(pl) {
+    FOR_FLOAT32_INPUTS(pr) {
+      CHECK_FLOAT_EQ(fmin(*pl, *pr), bt.call(*pl, *pr));
+    }
+  }
+}
 
 TEST(RunFloat32SubP) {
   RawMachineAssemblerTester<int32_t> m;