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{TrueMotion,TM16}_NEON: remove zero extension

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Replace vmovl_u8 -> s16 + signed vaddq with unsigned vaddw.
No change in assembly with clang-16 (armv7 & aarch64) and gcc-13
(aarch64). armv7 gcc-13 had kept the vmovl instructions, those are now
gone.

Change-Id: Ibb4fbdd5680d3e9dd06933c100528a6f363de472
This commit is contained in:
James Zern 2024-08-07 16:16:51 -07:00
parent 04834acae7
commit f9a480f7c3
1 changed files with 25 additions and 23 deletions
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48
src/dsp/dec_neon.c
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@ -1300,18 +1300,19 @@ static void DC4_NEON(uint8_t* dst) { // DC
static WEBP_INLINE void TrueMotion_NEON(uint8_t* dst, int size) {
const uint8x8_t TL = vld1_dup_u8(dst - BPS - 1); // top-left pixel 'A[-1]'
const uint8x8_t T = vld1_u8(dst - BPS); // top row 'A[0..3]'
const int16x8_t d = vreinterpretq_s16_u16(vsubl_u8(T, TL)); // A[c] - A[-1]
const uint16x8_t d = vsubl_u8(T, TL); // A[c] - A[-1]
int y;
for (y = 0; y < size; y += 4) {
// left edge
const int16x8_t L0 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 0 * BPS - 1));
const int16x8_t L1 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 1 * BPS - 1));
const int16x8_t L2 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 2 * BPS - 1));
const int16x8_t L3 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 3 * BPS - 1));
const int16x8_t r0 = vaddq_s16(L0, d); // L[r] + A[c] - A[-1]
const int16x8_t r1 = vaddq_s16(L1, d);
const int16x8_t r2 = vaddq_s16(L2, d);
const int16x8_t r3 = vaddq_s16(L3, d);
const uint8x8_t L0 = vld1_dup_u8(dst + 0 * BPS - 1);
const uint8x8_t L1 = vld1_dup_u8(dst + 1 * BPS - 1);
const uint8x8_t L2 = vld1_dup_u8(dst + 2 * BPS - 1);
const uint8x8_t L3 = vld1_dup_u8(dst + 3 * BPS - 1);
// L[r] + A[c] - A[-1]
const int16x8_t r0 = vreinterpretq_s16_u16(vaddw_u8(d, L0));
const int16x8_t r1 = vreinterpretq_s16_u16(vaddw_u8(d, L1));
const int16x8_t r2 = vreinterpretq_s16_u16(vaddw_u8(d, L2));
const int16x8_t r3 = vreinterpretq_s16_u16(vaddw_u8(d, L3));
// Saturate and store the result.
const uint32x2_t r0_u32 = vreinterpret_u32_u8(vqmovun_s16(r0));
const uint32x2_t r1_u32 = vreinterpret_u32_u8(vqmovun_s16(r1));
@ -1572,23 +1573,24 @@ static void TM16_NEON(uint8_t* dst) {
const uint8x8_t TL = vld1_dup_u8(dst - BPS - 1); // top-left pixel 'A[-1]'
const uint8x16_t T = vld1q_u8(dst - BPS); // top row 'A[0..15]'
// A[c] - A[-1]
const int16x8_t d_lo = vreinterpretq_s16_u16(vsubl_u8(vget_low_u8(T), TL));
const int16x8_t d_hi = vreinterpretq_s16_u16(vsubl_u8(vget_high_u8(T), TL));
const uint16x8_t d_lo = vsubl_u8(vget_low_u8(T), TL);
const uint16x8_t d_hi = vsubl_u8(vget_high_u8(T), TL);
int y;
for (y = 0; y < 16; y += 4) {
// left edge
const int16x8_t L0 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 0 * BPS - 1));
const int16x8_t L1 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 1 * BPS - 1));
const int16x8_t L2 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 2 * BPS - 1));
const int16x8_t L3 = ConvertU8ToS16_NEON(vld1_dup_u8(dst + 3 * BPS - 1));
const int16x8_t r0_lo = vaddq_s16(L0, d_lo); // L[r] + A[c] - A[-1]
const int16x8_t r1_lo = vaddq_s16(L1, d_lo);
const int16x8_t r2_lo = vaddq_s16(L2, d_lo);
const int16x8_t r3_lo = vaddq_s16(L3, d_lo);
const int16x8_t r0_hi = vaddq_s16(L0, d_hi);
const int16x8_t r1_hi = vaddq_s16(L1, d_hi);
const int16x8_t r2_hi = vaddq_s16(L2, d_hi);
const int16x8_t r3_hi = vaddq_s16(L3, d_hi);
const uint8x8_t L0 = vld1_dup_u8(dst + 0 * BPS - 1);
const uint8x8_t L1 = vld1_dup_u8(dst + 1 * BPS - 1);
const uint8x8_t L2 = vld1_dup_u8(dst + 2 * BPS - 1);
const uint8x8_t L3 = vld1_dup_u8(dst + 3 * BPS - 1);
// L[r] + A[c] - A[-1]
const int16x8_t r0_lo = vreinterpretq_s16_u16(vaddw_u8(d_lo, L0));
const int16x8_t r1_lo = vreinterpretq_s16_u16(vaddw_u8(d_lo, L1));
const int16x8_t r2_lo = vreinterpretq_s16_u16(vaddw_u8(d_lo, L2));
const int16x8_t r3_lo = vreinterpretq_s16_u16(vaddw_u8(d_lo, L3));
const int16x8_t r0_hi = vreinterpretq_s16_u16(vaddw_u8(d_hi, L0));
const int16x8_t r1_hi = vreinterpretq_s16_u16(vaddw_u8(d_hi, L1));
const int16x8_t r2_hi = vreinterpretq_s16_u16(vaddw_u8(d_hi, L2));
const int16x8_t r3_hi = vreinterpretq_s16_u16(vaddw_u8(d_hi, L3));
// Saturate and store the result.
const uint8x16_t row0 = vcombine_u8(vqmovun_s16(r0_lo), vqmovun_s16(r0_hi));
const uint8x16_t row1 = vcombine_u8(vqmovun_s16(r1_lo), vqmovun_s16(r1_hi));