Check if two rectangles intersect

intersect.cpp

#include <xmmintrin.h>
#include <stdint.h>

struct alignas(16) Rect
{
    float left;
    float right;
    float top;
    float bottom;
};

bool intersect1(Rect a, Rect b)
{
    return 
        (a.left <= b.right) and
        (a.top <= b.bottom) and
        (b.left <= a.right) and
        (b.top <= a.bottom)
    ;
}

bool intersect2(Rect a, Rect b)
{
    __m128 am = _mm_load_ps((float*)&a);
    __m128 bm = _mm_load_ps((float*)&b);
    
    __m128 c1 = _mm_shuffle_ps(am, bm, 0xDD); // [3, 1, 3, 1]
    __m128 c2 = _mm_shuffle_ps(bm, am, 0x88); // [2, 0, 2, 0]
    __m128 cmp = _mm_cmpgt_ps(c1, c2);
    alignas(16) uint64_t cmpres[2];
    _mm_store_si128((__m128i*)&cmpres, _mm_castps_si128(cmp));
    
    return !(cmpres[0] | cmpres[1]);
}