void test_vuzpQu32 (void)
{
uint32x4x2_t out_uint32x4x2_t;
uint32x4_t arg0_uint32x4_t;
uint32x4_t arg1_uint32x4_t;
out_uint32x4x2_t = vuzpq_u32 (arg0_uint32x4_t, arg1_uint32x4_t);
}
// about twice as fast as generic
void MipMap_32_neon( int width, int height, unsigned char *source, unsigned char *target )
{
if(width < 8) {
MipMap_32_generic(width, height, source, target);
return;
}
int newwidth = width / 2;
int newheight = height / 2;
int stride = width * 4;
unsigned char *s = target;
unsigned char *t = source;
unsigned char *u = t+stride;
int y, x;
for( y = 0; y < newheight; y++ ) {
for( x = 0; x < newwidth; x+=4 ) {
uint8x16_t a0, a1, a2, a3;
memcpy(&a0, t, 16);
memcpy(&a1, t+16, 16);
memcpy(&a2, u, 16);
memcpy(&a3, u+16, 16);
// average first and second scan lines
a0 = vhaddq_u8(a0, a2);
a1 = vhaddq_u8(a1, a3);
// repack
uint32x4x2_t z = vuzpq_u32(vreinterpretq_u32_u8(a0), vreinterpretq_u32_u8(a1));
uint8x16_t d0, d1;
memcpy(&d0, &z.val[0], 16), memcpy(&d1, &z.val[1], 16);
// average even and odd x pixels
a0 = vhaddq_u8(vreinterpretq_u8_u32(z.val[0]), vreinterpretq_u8_u32(z.val[1]));
memcpy(s, &a0, 16);
s+=16;
t+=32;
u+=32;
}
t += stride;
u += stride;
}
}
uint32x4x2_t test_vuzpq_u32(uint32x4_t a, uint32x4_t b) {
// CHECK-LABEL: test_vuzpq_u32
return vuzpq_u32(a, b);
// CHECK: uzp1 {{v[0-9]+}}.4s, {{v[0-9]+}}.4s
// CHECK: uzp2 {{v[0-9]+}}.4s, {{v[0-9]+}}.4s
}
