fork(3) download

copy

#include <emmintrin.h>
#include <cassert>
 
bool less(const __m128i& a, const __m128i& b) {
    __m128i t = _mm_cmplt_epi32(a,b);
    __m128i u = _mm_cmpgt_epi32(a,b);
    __m128i z = _mm_or_si128(t,_mm_shuffle_epi32(t,177));
    z = _mm_andnot_si128(_mm_shuffle_epi32(u,245),z);
    return z.m128i_u64[0] == 0xffffffffull;
}
 
int main() {
    __m128i vals[] = { 
        _mm_set_epi32(0,0,0,0),
        _mm_set_epi32(0,0,0,1),
        _mm_set_epi32(0,0,0,0xffffffff),
        _mm_set_epi32(0,0,1,0),
        _mm_set_epi32(0,0,1,0xffffffff),
        _mm_set_epi32(0,0,2,0)
    };
 
 
    for (int i = 0; i < 6; ++i) {
        for (int j = 0; j < 6; ++j) {
            bool result = less(vals[i], vals[j]);
            bool expected = i < j;
            assert(result == expected);
        }
    }
}

In file included from prog.cpp:1:
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/emmintrin.h:34:3: error: #error "SSE2 instruction set not enabled"
prog.cpp:4: error: expected ‘,’ or ‘...’ before ‘&’ token
prog.cpp:4: error: ISO C++ forbids declaration of ‘__m128i’ with no type
prog.cpp: In function ‘bool less(int)’:
prog.cpp:5: error: expected `;' before ‘t’
prog.cpp:5: warning: statement has no effect
prog.cpp:6: error: expected `;' before ‘u’
prog.cpp:6: warning: statement has no effect
prog.cpp:7: error: expected `;' before ‘z’
prog.cpp:7: warning: statement has no effect
prog.cpp:8: error: ‘z’ was not declared in this scope
prog.cpp:8: error: ‘u’ was not declared in this scope
prog.cpp:8: error: ‘_mm_shuffle_epi32’ was not declared in this scope
prog.cpp:8: error: ‘_mm_andnot_si128’ was not declared in this scope
prog.cpp: In function ‘int main()’:
prog.cpp:13: error: ‘__m128i’ was not declared in this scope
prog.cpp:13: error: expected `;' before ‘vals’
prog.cpp:25: error: ‘vals’ was not declared in this scope

Standard output is empty