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dsp/cost*: use WEBP_RESTRICT qualifier

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on SetResidualCoeffs_*. This results in some minor code reordering when
targeting arvm7 with ndk r27 and other recent versions of clang. No
changes in the x86 compilations with clang-16 / gcc-13.

This only affects non-vector pointers; any vector pointers are left as a
follow up.

Change-Id: I7c3554ece848fafbc5ac9c4944f1dc85129f6fd8
This commit is contained in:
James Zern 2021-07-03 17:45:13 -07:00
parent 84b118c9c3
commit 02eac8a741
5 changed files with 11 additions and 10 deletions
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4
src/dsp/cost.c
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@ -354,8 +354,8 @@ static int GetResidualCost_C(int ctx0, const VP8Residual* const res) {
return cost;
}
static void SetResidualCoeffs_C(const int16_t* const coeffs,
VP8Residual* const res) {
static void SetResidualCoeffs_C(const int16_t* WEBP_RESTRICT const coeffs,
VP8Residual* WEBP_RESTRICT const res) {
int n;
res->last = -1;
assert(res->first == 0 || coeffs[0] == 0);

4
src/dsp/cost_mips32.c
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@ -96,8 +96,8 @@ static int GetResidualCost_MIPS32(int ctx0, const VP8Residual* const res) {
return cost;
}
static void SetResidualCoeffs_MIPS32(const int16_t* const coeffs,
VP8Residual* const res) {
static void SetResidualCoeffs_MIPS32(const int16_t* WEBP_RESTRICT const coeffs,
VP8Residual* WEBP_RESTRICT const res) {
const int16_t* p_coeffs = (int16_t*)coeffs;
int temp0, temp1, temp2, n, n1;
assert(res->first == 0 || coeffs[0] == 0);

4
src/dsp/cost_neon.c
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@ -19,8 +19,8 @@
static const uint8_t position[16] = { 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14, 15, 16 };
static void SetResidualCoeffs_NEON(const int16_t* const coeffs,
VP8Residual* const res) {
static void SetResidualCoeffs_NEON(const int16_t* WEBP_RESTRICT const coeffs,
VP8Residual* WEBP_RESTRICT const res) {
const int16x8_t minus_one = vdupq_n_s16(-1);
const int16x8_t coeffs_0 = vld1q_s16(coeffs);
const int16x8_t coeffs_1 = vld1q_s16(coeffs + 8);

4
src/dsp/cost_sse2.c
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@ -22,8 +22,8 @@
//------------------------------------------------------------------------------
static void SetResidualCoeffs_SSE2(const int16_t* const coeffs,
VP8Residual* const res) {
static void SetResidualCoeffs_SSE2(const int16_t* WEBP_RESTRICT const coeffs,
VP8Residual* WEBP_RESTRICT const res) {
const __m128i c0 = _mm_loadu_si128((const __m128i*)(coeffs + 0));
const __m128i c1 = _mm_loadu_si128((const __m128i*)(coeffs + 8));
// Use SSE2 to compare 16 values with a single instruction.

5
src/dsp/dsp.h
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@ -138,8 +138,9 @@ extern const uint16_t VP8LevelFixedCosts[2047 /*MAX_LEVEL*/ + 1];
extern const uint8_t VP8EncBands[16 + 1];
struct VP8Residual;
typedef void (*VP8SetResidualCoeffsFunc)(const int16_t* const coeffs,
struct VP8Residual* const res);
typedef void (*VP8SetResidualCoeffsFunc)(
const int16_t* WEBP_RESTRICT const coeffs,
struct VP8Residual* WEBP_RESTRICT const res);
extern VP8SetResidualCoeffsFunc VP8SetResidualCoeffs;
// Cost calculation function.