175 {
176 uint8_t a[16] = {255,128,64,32, 255,128,64,32, 255,128,64,32, 255,128,64,32};
177 uint8_t output[16] = {0};
178 store_u8_16(output, scale_u8_16(load_u8_16(a), 128));
179 for (int i = 0; i < 16; i++) {
180 int expected = (a[i] * 128) / 256;
181 int diff = (int)output[i] - expected;
182 if (diff < -1 || diff > 1) return false;
183 }
184 return true;
185}