Backport missing tunings for -march=core2:
- enable extra 80387 mathematical constants (ext_80387_constants) [1] - enable compare and exchange 16 bytes (cmpxchg16b) [2] Verified against llvm-gcc (and apple gcc) Obtained from: gcc-4.3 (ref. svn revs. 119260 [1], 121140 [2]; GPLv2) MFC after: 2 weeks
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=219711
@ -926,7 +926,7 @@ const int x86_use_incdec = ~(m_PENT4 | m_NOCONA | m_CORE2 | m_GENERIC);
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integer data in xmm registers. Which results in pretty abysmal code. */
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const int x86_inter_unit_moves = 0 /* ~(m_ATHLON_K8) */;
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const int x86_ext_80387_constants = m_K6_GEODE | m_ATHLON | m_PENT4 | m_NOCONA | m_PPRO | m_GENERIC32;
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const int x86_ext_80387_constants = m_K6_GEODE | m_ATHLON | m_PENT4 | m_NOCONA | m_CORE2 | m_PPRO | m_GENERIC32;
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/* Some CPU cores are not able to predict more than 4 branch instructions in
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the 16 byte window. */
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const int x86_four_jump_limit = m_PPRO | m_ATHLON_K8 | m_PENT4 | m_NOCONA | m_CORE2 | m_GENERIC;
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@ -937,7 +937,7 @@ const int x86_cmpxchg = ~m_386;
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/* Compare and exchange 8 bytes was added for pentium. */
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const int x86_cmpxchg8b = ~(m_386 | m_486);
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/* Compare and exchange 16 bytes was added for nocona. */
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const int x86_cmpxchg16b = m_NOCONA;
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const int x86_cmpxchg16b = m_NOCONA | m_CORE2;
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/* Exchange and add was added for 80486. */
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const int x86_xadd = ~m_386;
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const int x86_pad_returns = m_ATHLON_K8 | m_CORE2 | m_GENERIC;
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