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diff src/cpu/x86/vm/vm_version_x86.hpp @ 11080:b800986664f4

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7088419: Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32 Summary: add intrinsics using new instruction to interpreter, C1, C2, for suitable x86; add test Reviewed-by: kvn, twisti
author drchase
date Tue, 02 Jul 2013 20:42:12 -0400
parents 00af3a3a8df4
children 6b0fd0964b87 9e9af3aa4278
line wrap: on
line diff
--- a/src/cpu/x86/vm/vm_version_x86.hpp	Tue Jul 02 07:51:31 2013 +0200
+++ b/src/cpu/x86/vm/vm_version_x86.hpp	Tue Jul 02 20:42:12 2013 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -61,7 +61,8 @@
     uint32_t value;
     struct {
       uint32_t sse3     : 1,
-                        : 2,
+               clmul    : 1,
+                        : 1,
                monitor  : 1,
                         : 1,
                vmx      : 1,
@@ -249,7 +250,8 @@
     CPU_AVX    = (1 << 17),
     CPU_AVX2   = (1 << 18),
     CPU_AES    = (1 << 19),
-    CPU_ERMS   = (1 << 20) // enhanced 'rep movsb/stosb' instructions
+    CPU_ERMS   = (1 << 20), // enhanced 'rep movsb/stosb' instructions
+    CPU_CLMUL  = (1 << 21) // carryless multiply for CRC
   } cpuFeatureFlags;
 
   enum {
@@ -429,6 +431,8 @@
       result |= CPU_AES;
     if (_cpuid_info.sef_cpuid7_ebx.bits.erms != 0)
       result |= CPU_ERMS;
+    if (_cpuid_info.std_cpuid1_ecx.bits.clmul != 0)
+      result |= CPU_CLMUL;
 
     // AMD features.
     if (is_amd()) {
@@ -555,6 +559,7 @@
   static bool supports_tsc()      { return (_cpuFeatures & CPU_TSC)    != 0; }
   static bool supports_aes()      { return (_cpuFeatures & CPU_AES) != 0; }
   static bool supports_erms()     { return (_cpuFeatures & CPU_ERMS) != 0; }
+  static bool supports_clmul()    { return (_cpuFeatures & CPU_CLMUL) != 0; }
 
   // Intel features
   static bool is_intel_family_core() { return is_intel() &&