1.1 --- a/src/cpu/mips/vm/vm_version_mips.cpp Tue May 16 16:35:16 2017 -0400
1.2 +++ b/src/cpu/mips/vm/vm_version_mips.cpp Wed May 17 03:46:25 2017 -0400
1.3 @@ -91,6 +91,18 @@
1.4 MaxVectorSize = 8;
1.5 }
1.6 }
1.7 +/*
1.8 + *
1.9 + * 2017/5/17:
1.10 + * Vector optimization of MIPS works in most cases, but cannot pass hotspot/test/compiler/6340864/TestFloatVect.java.
1.11 + * Vector optimization was closed by default.
1.12 + * The reasons:
1.13 + * 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.
1.14 + * 2. It seems the gcc4.4.7 had some bug related to ucontext_t, which is used in signal handler to emulate PS instructions.
1.15 + */
1.16 + if (FLAG_IS_DEFAULT(MaxVectorSize)) {
1.17 + MaxVectorSize = 0;
1.18 + }
1.19
1.20 if (is_gs464e()) {
1.21 if (FLAG_IS_DEFAULT(UseCountTrailingZerosInstruction)) {
