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dsp/filters*: use WEBP_RESTRICT qualifier

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Better stack/register usage in SSE2/NEON code and improved vectorization
of the C code with ndk r27/gcc-13/clang-16.

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

Change-Id: I32b53dd38bfc7e2231d875409e7dfda7c513cfb6
This commit is contained in:
James Zern 2024-08-16 13:52:32 -07:00
parent b1cb37e659
commit 04d4b4f387
6 changed files with 108 additions and 80 deletions
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5
src/dsp/dsp.h
View File

@ -497,8 +497,9 @@ typedef enum { // Filter types.
WEBP_FILTER_FAST
} WEBP_FILTER_TYPE;
typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height,
int stride, uint8_t* out);
typedef void (*WebPFilterFunc)(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT out);
// In-place un-filtering.
// Warning! 'prev_line' pointer can be equal to 'cur_line' or 'preds'.
typedef void (*WebPUnfilterFunc)(const uint8_t* prev_line, const uint8_t* preds,

33
src/dsp/filters.c
View File

@ -23,14 +23,16 @@
do { \
assert((in) != NULL); \
assert((out) != NULL); \
assert((in) != (out)); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
} while (0)
#if !WEBP_NEON_OMIT_C_CODE
static WEBP_INLINE void PredictLine_C(const uint8_t* src, const uint8_t* pred,
uint8_t* dst, int length) {
static WEBP_INLINE void PredictLine_C(const uint8_t* WEBP_RESTRICT src,
const uint8_t* WEBP_RESTRICT pred,
uint8_t* WEBP_RESTRICT dst, int length) {
int i;
for (i = 0; i < length; ++i) dst[i] = (uint8_t)(src[i] - pred[i]);
}
@ -38,9 +40,9 @@ static WEBP_INLINE void PredictLine_C(const uint8_t* src, const uint8_t* pred,
//------------------------------------------------------------------------------
// Horizontal filter.
static WEBP_INLINE void DoHorizontalFilter_C(const uint8_t* in,
static WEBP_INLINE void DoHorizontalFilter_C(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -66,9 +68,9 @@ static WEBP_INLINE void DoHorizontalFilter_C(const uint8_t* in,
//------------------------------------------------------------------------------
// Vertical filter.
static WEBP_INLINE void DoVerticalFilter_C(const uint8_t* in,
static WEBP_INLINE void DoVerticalFilter_C(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -99,9 +101,9 @@ static WEBP_INLINE int GradientPredictor_C(uint8_t a, uint8_t b, uint8_t c) {
}
#if !WEBP_NEON_OMIT_C_CODE
static WEBP_INLINE void DoGradientFilter_C(const uint8_t* in,
static WEBP_INLINE void DoGradientFilter_C(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -136,18 +138,21 @@ static WEBP_INLINE void DoGradientFilter_C(const uint8_t* in,
//------------------------------------------------------------------------------
#if !WEBP_NEON_OMIT_C_CODE
static void HorizontalFilter_C(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void HorizontalFilter_C(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoHorizontalFilter_C(data, width, height, stride, filtered_data);
}
static void VerticalFilter_C(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void VerticalFilter_C(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoVerticalFilter_C(data, width, height, stride, filtered_data);
}
static void GradientFilter_C(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void GradientFilter_C(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoGradientFilter_C(data, width, height, stride, filtered_data);
}
#endif // !WEBP_NEON_OMIT_C_CODE

40
src/dsp/filters_mips_dsp_r2.c
View File

@ -26,8 +26,9 @@
#define DCHECK(in, out) \
do { \
assert(in != NULL); \
assert(out != NULL); \
assert((in) != NULL); \
assert((out) != NULL); \
assert((in) != (out)); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
@ -101,7 +102,8 @@
); \
} while (0)
static WEBP_INLINE void PredictLine_MIPSdspR2(const uint8_t* src, uint8_t* dst,
static WEBP_INLINE void PredictLine_MIPSdspR2(const uint8_t* WEBP_RESTRICT src,
uint8_t* WEBP_RESTRICT dst,
int length) {
DO_PREDICT_LINE(src, dst, length, 0);
}
@ -191,9 +193,9 @@ static WEBP_INLINE void PredictLine_MIPSdspR2(const uint8_t* src, uint8_t* dst,
} \
} while (0)
static WEBP_INLINE void DoHorizontalFilter_MIPSdspR2(const uint8_t* in,
int width, int height,
int stride, uint8_t* out) {
static WEBP_INLINE void DoHorizontalFilter_MIPSdspR2(
const uint8_t* WEBP_RESTRICT in, int width, int height, int stride,
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -210,9 +212,9 @@ static WEBP_INLINE void DoHorizontalFilter_MIPSdspR2(const uint8_t* in,
}
#undef FILTER_LINE_BY_LINE
static void HorizontalFilter_MIPSdspR2(const uint8_t* data,
int width, int height,
int stride, uint8_t* filtered_data) {
static void HorizontalFilter_MIPSdspR2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoHorizontalFilter_MIPSdspR2(data, width, height, stride, filtered_data);
}
@ -228,9 +230,9 @@ static void HorizontalFilter_MIPSdspR2(const uint8_t* data,
} \
} while (0)
static WEBP_INLINE void DoVerticalFilter_MIPSdspR2(const uint8_t* in,
int width, int height,
int stride, uint8_t* out) {
static WEBP_INLINE void DoVerticalFilter_MIPSdspR2(
const uint8_t* WEBP_RESTRICT in, int width, int height, int stride,
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -247,8 +249,9 @@ static WEBP_INLINE void DoVerticalFilter_MIPSdspR2(const uint8_t* in,
}
#undef FILTER_LINE_BY_LINE
static void VerticalFilter_MIPSdspR2(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void VerticalFilter_MIPSdspR2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoVerticalFilter_MIPSdspR2(data, width, height, stride, filtered_data);
}
@ -284,9 +287,9 @@ static int GradientPredictor_MIPSdspR2(uint8_t a, uint8_t b, uint8_t c) {
} \
} while (0)
static void DoGradientFilter_MIPSdspR2(const uint8_t* in,
static void DoGradientFilter_MIPSdspR2(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
const uint8_t* preds = in;
int row;
DCHECK(in, out);
@ -303,8 +306,9 @@ static void DoGradientFilter_MIPSdspR2(const uint8_t* in,
}
#undef FILTER_LINE_BY_LINE
static void GradientFilter_MIPSdspR2(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void GradientFilter_MIPSdspR2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoGradientFilter_MIPSdspR2(data, width, height, stride, filtered_data);
}

27
src/dsp/filters_msa.c
View File

@ -21,7 +21,8 @@
static WEBP_INLINE void PredictLineInverse0(const uint8_t* src,
const uint8_t* pred,
uint8_t* dst, int length) {
uint8_t* WEBP_RESTRICT dst,
int length) {
v16u8 src0, pred0, dst0;
assert(length >= 0);
while (length >= 32) {
@ -58,8 +59,9 @@ static WEBP_INLINE void PredictLineInverse0(const uint8_t* src,
#define DCHECK(in, out) \
do { \
assert(in != NULL); \
assert(out != NULL); \
assert((in) != NULL); \
assert((out) != NULL); \
assert((in) != (out)); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
@ -68,8 +70,9 @@ static WEBP_INLINE void PredictLineInverse0(const uint8_t* src,
//------------------------------------------------------------------------------
// Horrizontal filter
static void HorizontalFilter_MSA(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void HorizontalFilter_MSA(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
const uint8_t* preds = data;
const uint8_t* in = data;
uint8_t* out = filtered_data;
@ -99,8 +102,8 @@ static void HorizontalFilter_MSA(const uint8_t* data, int width, int height,
static WEBP_INLINE void PredictLineGradient(const uint8_t* pinput,
const uint8_t* ppred,
uint8_t* poutput, int stride,
int size) {
uint8_t* WEBP_RESTRICT poutput,
int stride, int size) {
int w;
const v16i8 zero = { 0 };
while (size >= 16) {
@ -131,8 +134,9 @@ static WEBP_INLINE void PredictLineGradient(const uint8_t* pinput,
}
static void GradientFilter_MSA(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void GradientFilter_MSA(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
const uint8_t* in = data;
const uint8_t* preds = data;
uint8_t* out = filtered_data;
@ -159,8 +163,9 @@ static void GradientFilter_MSA(const uint8_t* data, int width, int height,
//------------------------------------------------------------------------------
// Vertical filter
static void VerticalFilter_MSA(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void VerticalFilter_MSA(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
const uint8_t* in = data;
const uint8_t* preds = data;
uint8_t* out = filtered_data;

42
src/dsp/filters_neon.c
View File

@ -23,8 +23,9 @@
#define DCHECK(in, out) \
do { \
assert(in != NULL); \
assert(out != NULL); \
assert((in) != NULL); \
assert((out) != NULL); \
assert((in) != (out)); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
@ -44,7 +45,7 @@
#define ROTATE_RIGHT_N(A, N) vext_u8((A), (A), (8 - (N)) % 8)
static void PredictLine_NEON(const uint8_t* src, const uint8_t* pred,
uint8_t* dst, int length) {
uint8_t* WEBP_RESTRICT dst, int length) {
int i;
assert(length >= 0);
for (i = 0; i + 16 <= length; i += 16) {
@ -57,16 +58,17 @@ static void PredictLine_NEON(const uint8_t* src, const uint8_t* pred,
}
// Special case for left-based prediction (when preds==dst-1 or preds==src-1).
static void PredictLineLeft_NEON(const uint8_t* src, uint8_t* dst, int length) {
static void PredictLineLeft_NEON(const uint8_t* WEBP_RESTRICT src,
uint8_t* WEBP_RESTRICT dst, int length) {
PredictLine_NEON(src, src - 1, dst, length);
}
//------------------------------------------------------------------------------
// Horizontal filter.
static WEBP_INLINE void DoHorizontalFilter_NEON(const uint8_t* in,
int width, int height,
int stride, uint8_t* out) {
static WEBP_INLINE void DoHorizontalFilter_NEON(
const uint8_t* WEBP_RESTRICT in, int width, int height, int stride,
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -86,17 +88,18 @@ static WEBP_INLINE void DoHorizontalFilter_NEON(const uint8_t* in,
}
}
static void HorizontalFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void HorizontalFilter_NEON(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoHorizontalFilter_NEON(data, width, height, stride, filtered_data);
}
//------------------------------------------------------------------------------
// Vertical filter.
static WEBP_INLINE void DoVerticalFilter_NEON(const uint8_t* in,
static WEBP_INLINE void DoVerticalFilter_NEON(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -115,8 +118,9 @@ static WEBP_INLINE void DoVerticalFilter_NEON(const uint8_t* in,
}
}
static void VerticalFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void VerticalFilter_NEON(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoVerticalFilter_NEON(data, width, height, stride, filtered_data);
}
@ -130,7 +134,8 @@ static WEBP_INLINE int GradientPredictor_C(uint8_t a, uint8_t b, uint8_t c) {
static void GradientPredictDirect_NEON(const uint8_t* const row,
const uint8_t* const top,
uint8_t* const out, int length) {
uint8_t* WEBP_RESTRICT const out,
int length) {
int i;
for (i = 0; i + 8 <= length; i += 8) {
const uint8x8_t A = vld1_u8(&row[i - 1]);
@ -146,9 +151,9 @@ static void GradientPredictDirect_NEON(const uint8_t* const row,
}
}
static WEBP_INLINE void DoGradientFilter_NEON(const uint8_t* in,
static WEBP_INLINE void DoGradientFilter_NEON(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -167,8 +172,9 @@ static WEBP_INLINE void DoGradientFilter_NEON(const uint8_t* in,
}
}
static void GradientFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void GradientFilter_NEON(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoGradientFilter_NEON(data, width, height, stride, filtered_data);
}

41
src/dsp/filters_sse2.c
View File

@ -27,13 +27,15 @@
do { \
assert((in) != NULL); \
assert((out) != NULL); \
assert((in) != (out)); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
} while (0)
static void PredictLineTop_SSE2(const uint8_t* src, const uint8_t* pred,
uint8_t* dst, int length) {
static void PredictLineTop_SSE2(const uint8_t* WEBP_RESTRICT src,
const uint8_t* WEBP_RESTRICT pred,
uint8_t* WEBP_RESTRICT dst, int length) {
int i;
const int max_pos = length & ~31;
assert(length >= 0);
@ -51,7 +53,8 @@ static void PredictLineTop_SSE2(const uint8_t* src, const uint8_t* pred,
}
// Special case for left-based prediction (when preds==dst-1 or preds==src-1).
static void PredictLineLeft_SSE2(const uint8_t* src, uint8_t* dst, int length) {
static void PredictLineLeft_SSE2(const uint8_t* WEBP_RESTRICT src,
uint8_t* WEBP_RESTRICT dst, int length) {
int i;
const int max_pos = length & ~31;
assert(length >= 0);
@ -71,9 +74,9 @@ static void PredictLineLeft_SSE2(const uint8_t* src, uint8_t* dst, int length) {
//------------------------------------------------------------------------------
// Horizontal filter.
static WEBP_INLINE void DoHorizontalFilter_SSE2(const uint8_t* in,
int width, int height,
int stride, uint8_t* out) {
static WEBP_INLINE void DoHorizontalFilter_SSE2(
const uint8_t* WEBP_RESTRICT in, int width, int height, int stride,
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -96,9 +99,9 @@ static WEBP_INLINE void DoHorizontalFilter_SSE2(const uint8_t* in,
//------------------------------------------------------------------------------
// Vertical filter.
static WEBP_INLINE void DoVerticalFilter_SSE2(const uint8_t* in,
static WEBP_INLINE void DoVerticalFilter_SSE2(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -127,7 +130,8 @@ static WEBP_INLINE int GradientPredictor_SSE2(uint8_t a, uint8_t b, uint8_t c) {
static void GradientPredictDirect_SSE2(const uint8_t* const row,
const uint8_t* const top,
uint8_t* const out, int length) {
uint8_t* WEBP_RESTRICT const out,
int length) {
const int max_pos = length & ~7;
int i;
const __m128i zero = _mm_setzero_si128();
@ -151,9 +155,9 @@ static void GradientPredictDirect_SSE2(const uint8_t* const row,
}
}
static WEBP_INLINE void DoGradientFilter_SSE2(const uint8_t* in,
static WEBP_INLINE void DoGradientFilter_SSE2(const uint8_t* WEBP_RESTRICT in,
int width, int height, int stride,
uint8_t* out) {
uint8_t* WEBP_RESTRICT out) {
int row;
DCHECK(in, out);
@ -176,18 +180,21 @@ static WEBP_INLINE void DoGradientFilter_SSE2(const uint8_t* in,
//------------------------------------------------------------------------------
static void HorizontalFilter_SSE2(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void HorizontalFilter_SSE2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoHorizontalFilter_SSE2(data, width, height, stride, filtered_data);
}
static void VerticalFilter_SSE2(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void VerticalFilter_SSE2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoVerticalFilter_SSE2(data, width, height, stride, filtered_data);
}
static void GradientFilter_SSE2(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
static void GradientFilter_SSE2(const uint8_t* WEBP_RESTRICT data,
int width, int height, int stride,
uint8_t* WEBP_RESTRICT filtered_data) {
DoGradientFilter_SSE2(data, width, height, stride, filtered_data);
}