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вс, 23 сент. 2018 г. в 10:10, Walter Dnes <waltdnes@××××××××.org>: |
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> |
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> On Thu, Sep 20, 2018 at 01:00:39AM +0300, gevisz wrote |
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> > ????, 19 ????????. 2018 ??. ?? 11:38, Walter Dnes <waltdnes@××××××××.org>: |
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> |
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> > > According to |
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> > > http://www.cpu-world.com/sspec/SL/SLA8Z.html it has... |
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> > > |
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> > > MMX SSE SSE2 SSE3 SSSE3 |
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> > |
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> > Do you mean that it would be enough to set |
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> > CFLAGS="-O2 -pipe mmx sse sse2 sse3 ssse3" |
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> > without setting the march cflag at all? |
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> |
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> Yes, that would work. Remember also to include in make.conf |
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> |
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> CPU_FLAGS_X86="mmx mmxext sse sse2 sse3 ssse3" |
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The target processor does not support mmxext. |
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> In your jpeg image, I see that the flags include mmx, sse, sse2, pni, |
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> and ssse3. "pni" == "Prescott New Instructions" == "SSE3". Looking at |
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> https://gcc.gnu.org/onlinedocs/gcc-7.3.0/gcc/x86-Options.html#x86-Options |
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> I suggest "-march=core2" with CPU_FLAGS_X86 same as above. The "core2" |
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> option uses MMX, SSE, SSE2, SSE3 and SSSE3 instructions, all of which |
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> show up in the listing on your jpeg. |
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Thank you. Looking into https://wiki.gentoo.org/wiki/Safe_CFLAGS#Intel |
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I also concluded that for the target processor I should set "-march=core2" |
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but I did not know that core2 option is exactly equivalent to setting mmx, |
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sse, sse2, sse3 and ssse3 instructions. |
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So, I decided to spend a day to get my hands on the target computer |
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and compile everything on it with "-march=native" no matter how much |
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time it takes. |
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To conclude this thread, I will post the output of the commands |
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suggested in this thread later, after the system install will be finished, |
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just in case somebody will need them in the future. |
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