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To check SSE3 availability compile this: |
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|
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############################## |
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|
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#include <stdint.h> |
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|
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uint8_t __attribute__((aligned(64))) current[64]; |
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uint8_t previous[64]; |
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|
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int main() |
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{ |
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int i; |
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uint64_t result; |
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uint32_t _eax, _ebx, _ecx, _edx; |
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uint8_t _cpuid[13]; |
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uint32_t *_cpuid0 = (uint32_t*) _cpuid; |
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uint32_t *_cpuid1 = (uint32_t*) ( _cpuid + 4 ); |
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uint32_t *_cpuid2 = (uint32_t*) ( _cpuid + 8 ); |
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uint8_t *ptr0 = current; |
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uint8_t *ptr1 = previous; |
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|
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__asm__ __volatile__ ( |
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"cpuid\n" |
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: "=a" (_eax), |
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"=b" (*_cpuid0), "=d" (*_cpuid1), "=c" (*_cpuid2) |
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: "a" (0) ); |
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_cpuid[12] = 0; |
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printf( "cpuid(0) returns %d (%s)\n", _eax, _cpuid ); |
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__asm__ __volatile__ ( |
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"cpuid\n" |
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: "=a" (_eax), "=b" (_ebx), "=c" (_ecx), "=d" (_edx) |
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: "a" (1) ); |
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printf( "cpuid(1) returns %08x %08x %08x %08x\n", |
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_eax, _ebx, _ecx, _edx ); |
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memset( current, 0xaa, 64 ); |
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memset( previous, 0x55, 64 ); |
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for( i = 0; i < 4; i ++ ) { |
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__asm__ __volatile__ ( |
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"movdqa %0, %%xmm0\n" |
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"movdqu %1, %%xmm1\n" |
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"psadbw %%xmm1, %%xmm0\n" |
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"paddw %%xmm0, %%xmm2\n" |
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"haddps %%xmm2, %%xmm2\n" |
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"haddps %%xmm2, %%xmm2\n" |
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: : "m" (*ptr0), |
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"m" (*ptr1) : "xmm0", "xmm1", "xmm2" ); |
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ptr0 += 16; |
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ptr1 += 16; |
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} |
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__asm__ __volatile__ ( |
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"movq %%xmm2, %0\n" |
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: "=m" (result) ); |
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printf( "Result is %llu\n", result ); |
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} |
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|
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###################### |
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|
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Compile it: |
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|
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# gcc -Wall test_pni.c -o test_pni |
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# ./test_pni |
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|
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If it runs ok you have SSE3, if it fails not. |
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|
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Cheers |
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|
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|
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On 9/4/06, lunaslide <lunaslide@××.org> wrote: |
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> |
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> Ed W wrote: |
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> > lunaslide wrote: |
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> >> You should be able to just install a generic gentoo if necessary, then |
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> >> change the profile over, change make.conf CFLAGS and 'emerge -e world' |
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> >> (possibly twice to get all the software rebuilt with the hardened |
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> >> toolchain) and have it running 64bit hardened. Putting |
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> >> '-march=athlon64 -msse3' in your CFLAGS should get you what you want. |
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> >> Do not use -O3, it's unstable and generally not worth it anyway. |
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> > |
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> > Is this really true? There are some notes in the 64 bit install doc |
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> > saying that it's *not* this easy and that some stuff needs to be |
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> > changed, especially to support a mixed 32/64 bit environment? Something |
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> > about multi-lib? |
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> > |
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> > Ed W |
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> |
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> You're referring to running 32bit programs on a 64bit OS. That does |
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> require the multilib stuff. But rebuilding the whole system from |
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> scratch with emerge -e world will build everything 64 bit. And if I |
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> recall correctly, when I was doing this with my box, it built two |
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> versions of glibc and portage even warned me it was doing so. So it |
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> might be building multilib just as a result of rebuilding the system |
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> 64bit. |
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> |
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> I'm just delving into this lately though, so someone please correct me |
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> if I misunderstood it. |
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> |
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> -- |
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> lunaslide * * * * |
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> * * * * * * * |
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> We can't have lasting peace unless we work actively and vigorously |
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> to bring about conditions of freedom and justice in the world. |
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> * * - Harry Truman at West Point, 1952 * * |
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> * * |
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> * * * * * * |
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> -- |
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> gentoo-hardened@g.o mailing list |
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> |
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> |
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