[x86] Avoid memory form of PUSH/CALL for ATOM.

src/x64/assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/x64/assembler-x64.h"
 
 #if V8_OS_MACOSX
 #include <sys/sysctl.h>
 #endif
 
@@ skipping 42 matching lines @@
 
   // Only use statically determined features for cross compile (snapshot).
   if (cross_compile) return;
 
   if (cpu.has_sse41() && FLAG_enable_sse4_1) supported_ |= 1u << SSE4_1;
   if (cpu.has_sse3() && FLAG_enable_sse3) supported_ |= 1u << SSE3;
   // SAHF is not generally available in long mode.
   if (cpu.has_sahf() && FLAG_enable_sahf) supported_ |= 1u << SAHF;
   if (cpu.has_avx() && EnableAVX()) supported_ |= 1u << AVX;
   if (cpu.has_fma3() && FLAG_enable_fma3) supported_ |= 1u << FMA3;
+  if (strcmp(FLAG_mcpu, "auto") == 0) {
+    if (cpu.is_atom()) supported_ |= 1u << ATOM;
+  } else if (strcmp(FLAG_mcpu, "atom") == 0) {
+    supported_ |= 1u << ATOM;
+  }
 }
 
 
 void CpuFeatures::PrintTarget() { }
 void CpuFeatures::PrintFeatures() {
-  printf("SSE3=%d SSE4_1=%d SAHF=%d AVX=%d FMA3=%d\n",
+  printf("SSE3=%d SSE4_1=%d SAHF=%d AVX=%d FMA3=%d ATOM=%d\n",
          CpuFeatures::IsSupported(SSE3), CpuFeatures::IsSupported(SSE4_1),
          CpuFeatures::IsSupported(SAHF), CpuFeatures::IsSupported(AVX),
-         CpuFeatures::IsSupported(FMA3));
+         CpuFeatures::IsSupported(FMA3), CpuFeatures::IsSupported(ATOM));
 }
 
 
 // -----------------------------------------------------------------------------
 // Implementation of RelocInfo
 
 // Patch the code at the current PC with a call to the target address.
 // Additional guard int3 instructions can be added if required.
 void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) {
   int code_size = Assembler::kCallSequenceLength + guard_bytes;
@@ skipping 3298 matching lines @@
 
 
 bool RelocInfo::IsInConstantPool() {
   return false;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64