Mercurial > jdk8-mips64-public > hotspot / changeset

     1.1 --- a/src/cpu/mips/vm/mips_64.ad	Tue May 16 16:35:16 2017 -0400
     1.2 +++ b/src/cpu/mips/vm/mips_64.ad	Wed May 17 03:46:25 2017 -0400
     1.3 @@ -692,6 +692,8 @@
     1.4  
     1.5  // Max vector size in bytes. 0 if not supported.
     1.6  const int Matcher::vector_width_in_bytes(BasicType bt) {
     1.7 +  if (MaxVectorSize == 0)
     1.8 +    return 0;
     1.9    assert(MaxVectorSize == 8, "");
    1.10    return 8;
    1.11  }

     2.1 --- a/src/cpu/mips/vm/vm_version_mips.cpp	Tue May 16 16:35:16 2017 -0400
     2.2 +++ b/src/cpu/mips/vm/vm_version_mips.cpp	Wed May 17 03:46:25 2017 -0400
     2.3 @@ -91,6 +91,18 @@
     2.4        MaxVectorSize = 8;
     2.5      }
     2.6    }
     2.7 +/*
     2.8 + *
     2.9 + * 2017/5/17:
    2.10 + * Vector optimization of MIPS works in most cases, but cannot pass hotspot/test/compiler/6340864/TestFloatVect.java.
    2.11 + * Vector optimization was closed by default.
    2.12 + * The reasons:
    2.13 + * 1. The kernel does not have emulation of PS instructions yet, so the emulation of PS instructions must be done in JVM, see JVM_handle_linux_signal.
    2.14 + * 2. It seems the gcc4.4.7 had some bug related to ucontext_t, which is used in signal handler to emulate PS instructions.
    2.15 + */
    2.16 +  if (FLAG_IS_DEFAULT(MaxVectorSize)) {
    2.17 +    MaxVectorSize = 0;
    2.18 +  }
    2.19  
    2.20    if (is_gs464e()) {
    2.21      if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction)) {