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Disable auto prefetcher for -march=znver1. 

2016-02-04  Victoria Stepanyan  <victoria.stepanyan@amd.com>

        * gcc/config/i386/x86-tune.def: Disable default prefetching
        for -march=znver1.

From-SVN: r233127
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Victoria Stepanyan 2016-02-04 07:52:08 +00:00 committed by Venkataramanan Kumar
parent 05dd97db3c
commit 07d88205a6
2 changed files with 6 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-02-04 Victoria Stepanyan <victoria.stepanyan@amd.com>
* gcc/config/i386/x86-tune.def: Disable default prefetching
for -march=znver1.
2016-02-03 Michael Meissner <meissner@linux.vnet.ibm.com>
Vladimir Makarov <vmakarov@redhat.com>

2
gcc/config/i386/x86-tune.def
View File

@ -218,7 +218,7 @@ DEF_TUNE (X86_TUNE_FOUR_JUMP_LIMIT, "four_jump_limit",
at -O3. For the moment, the prefetching seems badly tuned for Intel
chips. */
DEF_TUNE (X86_TUNE_SOFTWARE_PREFETCHING_BENEFICIAL, "software_prefetching_beneficial",
m_K6_GEODE | m_AMD_MULTIPLE)
m_K6_GEODE | m_ATHLON_K8 | m_AMDFAM10 | m_BDVER | m_BTVER)
/* X86_TUNE_LCP_STALL: Avoid an expensive length-changing prefix stall
on 16-bit immediate moves into memory on Core2 and Corei7. */