dec_neon,DC8_NEON: use vaddlv instead of movl+vaddv
one fewer instruction
@@ -1429,8 +1429,7 @@ static WEBP_INLINE void DC8_NEON(uint8_t* dst, int do_top, int do_left) {
if (do_top) {
const uint8x8_t A = vld1_u8(dst - BPS); // top row
#if defined(__aarch64__)
- const uint16x8_t B = vmovl_u8(A);
- const uint16_t p2 = vaddvq_u16(B);
+ const uint16_t p2 = vaddlv_u8(A);
sum_top = vdupq_n_u16(p2);
#else
const uint16x4_t p0 = vpaddl_u8(A); // cascading summation of the top
