Set SAHF flag correctly in ia32

src/cpu.cc

Index: src/cpu.cc
diff --git a/src/cpu.cc b/src/cpu.cc
index 8d9afd84ae444c1288d7ad3205ea51293932638a..eb64271ca23b2a475b466a3b6b2066142535f32c 100644
--- a/src/cpu.cc
+++ b/src/cpu.cc
@@ -300,6 +300,10 @@ CPU::CPU() : stepping_(0),
     has_sse42_ = (cpu_info[2] & 0x00100000) != 0;
   }
 
+#if V8_HOST_ARCH_IA32
+  // SAHF is always available in compat/legacy mode,
+  has_sahf_ = true;
+#else
   // Query extended IDs.
   __cpuid(cpu_info, 0x80000000);
   unsigned num_ext_ids = cpu_info[0];
@@ -307,14 +311,10 @@ CPU::CPU() : stepping_(0),
   // Interpret extended CPU feature information.
   if (num_ext_ids > 0x80000000) {
     __cpuid(cpu_info, 0x80000001);
-    // SAHF is always available in compat/legacy mode,
-    // but must be probed in long mode.
-#if V8_HOST_ARCH_IA32
-    has_sahf_ = true;
-#else
+    // SAHF must be probed in long mode.
     has_sahf_ = (cpu_info[2] & 0x00000001) != 0;
-#endif
   }
+#endif
 
 #elif V8_HOST_ARCH_ARM