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diff src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 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 ef57c43512d6
children 980532a806a5 0f57ccdb9084
line wrap: on
line diff
--- a/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Tue Jul 02 07:51:31 2013 +0200
+++ b/src/cpu/x86/vm/stubGenerator_x86_64.cpp	Tue Jul 02 20:42:12 2013 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 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
@@ -3584,7 +3584,45 @@
     return start;
   }
 
-
+  /**
+   *  Arguments:
+   *
+   * Inputs:
+   *   c_rarg0   - int crc
+   *   c_rarg1   - byte* buf
+   *   c_rarg2   - int length
+   *
+   * Ouput:
+   *       rax   - int crc result
+   */
+  address generate_updateBytesCRC32() {
+    assert(UseCRC32Intrinsics, "need AVX and CLMUL instructions");
+
+    __ align(CodeEntryAlignment);
+    StubCodeMark mark(this, "StubRoutines", "updateBytesCRC32");
+
+    address start = __ pc();
+    // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...)
+    // Unix:  rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...)
+    // rscratch1: r10
+    const Register crc   = c_rarg0;  // crc
+    const Register buf   = c_rarg1;  // source java byte array address
+    const Register len   = c_rarg2;  // length
+    const Register table = c_rarg3;  // crc_table address (reuse register)
+    const Register tmp   = r11;
+    assert_different_registers(crc, buf, len, table, tmp, rax);
+
+    BLOCK_COMMENT("Entry:");
+    __ enter(); // required for proper stackwalking of RuntimeStub frame
+
+    __ kernel_crc32(crc, buf, len, table, tmp);
+
+    __ movl(rax, crc);
+    __ leave(); // required for proper stackwalking of RuntimeStub frame
+    __ ret(0);
+
+    return start;
+  }
 
 #undef __
 #define __ masm->
@@ -3736,6 +3774,11 @@
                                CAST_FROM_FN_PTR(address,
                                                 SharedRuntime::
                                                 throw_StackOverflowError));
+    if (UseCRC32Intrinsics) {
+      // set table address before stub generation which use it
+      StubRoutines::_crc_table_adr = (address)StubRoutines::x86::_crc_table;
+      StubRoutines::_updateBytesCRC32 = generate_updateBytesCRC32();
+    }
   }
 
   void generate_all() {