Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- a/src/share/vm/opto/macro.cpp	Wed Apr 18 12:37:42 2018 -0700
     1.2 +++ b/src/share/vm/opto/macro.cpp	Mon Apr 23 02:05:50 2018 -0700
     1.3 @@ -1,5 +1,5 @@
     1.4  /*
     1.5 - * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
     1.6 + * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
     1.7   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.8   *
     1.9   * This code is free software; you can redistribute it and/or modify it
    1.10 @@ -1775,7 +1775,7 @@
    1.11        i_o = pf_phi_abio;
    1.12     } else if( UseTLAB && AllocatePrefetchStyle == 3 ) {
    1.13        // Insert a prefetch for each allocation.
    1.14 -      // This code is used for Sparc with BIS.
    1.15 +      // This code is used to generate 1 prefetch instruction per cache line.
    1.16        Node *pf_region = new (C) RegionNode(3);
    1.17        Node *pf_phi_rawmem = new (C) PhiNode( pf_region, Type::MEMORY,
    1.18                                               TypeRawPtr::BOTTOM );
    1.19 @@ -1791,6 +1791,8 @@
    1.20        transform_later(cache_adr);
    1.21        cache_adr = new (C) CastP2XNode(needgc_false, cache_adr);
    1.22        transform_later(cache_adr);
    1.23 +      // Address is aligned to execute prefetch to the beginning of cache line size
    1.24 +      // (it is important when BIS instruction is used on SPARC as prefetch).
    1.25        Node* mask = _igvn.MakeConX(~(intptr_t)(step_size-1));
    1.26        cache_adr = new (C) AndXNode(cache_adr, mask);
    1.27        transform_later(cache_adr);