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dsp/rescaler*: use WEBP_RESTRICT qualifier

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Some improvement in the C code. No changes in NEON or SSE2 w/ndk
r27/gcc-13/clang-16.

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

Change-Id: I2316122db893f48f0afda90a147c83cac7f07526
This commit is contained in:
James Zern 2024-08-16 16:55:00 -07:00
parent a32b436bd5
commit 35915b389e
6 changed files with 46 additions and 42 deletions
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20
src/dsp/dsp.h
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@ -366,8 +366,9 @@ struct WebPRescaler;
// Import a row of data and save its contribution in the rescaler.
// 'channel' denotes the channel number to be imported. 'Expand' corresponds to
// the wrk->x_expand case. Otherwise, 'Shrink' is to be used.
typedef void (*WebPRescalerImportRowFunc)(struct WebPRescaler* const wrk,
const uint8_t* src);
typedef void (*WebPRescalerImportRowFunc)(
struct WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src);
extern WebPRescalerImportRowFunc WebPRescalerImportRowExpand;
extern WebPRescalerImportRowFunc WebPRescalerImportRowShrink;
@ -380,16 +381,19 @@ extern WebPRescalerExportRowFunc WebPRescalerExportRowExpand;
extern WebPRescalerExportRowFunc WebPRescalerExportRowShrink;
// Plain-C implementation, as fall-back.
extern void WebPRescalerImportRowExpand_C(struct WebPRescaler* const wrk,
const uint8_t* src);
extern void WebPRescalerImportRowShrink_C(struct WebPRescaler* const wrk,
const uint8_t* src);
extern void WebPRescalerImportRowExpand_C(
struct WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src);
extern void WebPRescalerImportRowShrink_C(
struct WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src);
extern void WebPRescalerExportRowExpand_C(struct WebPRescaler* const wrk);
extern void WebPRescalerExportRowShrink_C(struct WebPRescaler* const wrk);
// Main entry calls:
extern void WebPRescalerImportRow(struct WebPRescaler* const wrk,
const uint8_t* src);
extern void WebPRescalerImportRow(
struct WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src);
// Export one row (starting at x_out position) from rescaler.
extern void WebPRescalerExportRow(struct WebPRescaler* const wrk);

11
src/dsp/rescaler.c
View File

@ -26,8 +26,8 @@
//------------------------------------------------------------------------------
// Row import
void WebPRescalerImportRowExpand_C(WebPRescaler* const wrk,
const uint8_t* src) {
void WebPRescalerImportRowExpand_C(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
int channel;
@ -59,8 +59,8 @@ void WebPRescalerImportRowExpand_C(WebPRescaler* const wrk,
}
}
void WebPRescalerImportRowShrink_C(WebPRescaler* const wrk,
const uint8_t* src) {
void WebPRescalerImportRowShrink_C(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
int channel;
@ -158,7 +158,8 @@ void WebPRescalerExportRowShrink_C(WebPRescaler* const wrk) {
//------------------------------------------------------------------------------
// Main entry calls
void WebPRescalerImportRow(WebPRescaler* const wrk, const uint8_t* src) {
void WebPRescalerImportRow(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
assert(!WebPRescalerInputDone(wrk));
if (!wrk->x_expand) {
WebPRescalerImportRowShrink(wrk, src);

8
src/dsp/rescaler_mips32.c
View File

@ -21,8 +21,8 @@
//------------------------------------------------------------------------------
// Row import
static void ImportRowShrink_MIPS32(WebPRescaler* const wrk,
const uint8_t* src) {
static void ImportRowShrink_MIPS32(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
@ -81,8 +81,8 @@ static void ImportRowShrink_MIPS32(WebPRescaler* const wrk,
}
}
static void ImportRowExpand_MIPS32(WebPRescaler* const wrk,
const uint8_t* src) {
static void ImportRowExpand_MIPS32(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int x_add = wrk->x_add;

27
src/dsp/rescaler_msa.c
View File

@ -114,9 +114,9 @@
dst = __msa_copy_s_w((v4i32)t0, 0); \
} while (0)
static WEBP_INLINE void ExportRowExpand_0(const uint32_t* frow, uint8_t* dst,
int length,
WebPRescaler* const wrk) {
static WEBP_INLINE void ExportRowExpand_0(
const uint32_t* WEBP_RESTRICT frow, uint8_t* WEBP_RESTRICT dst, int length,
WebPRescaler* WEBP_RESTRICT const wrk) {
const v4u32 scale = (v4u32)__msa_fill_w(wrk->fy_scale);
const v4u32 shift = (v4u32)__msa_fill_w(WEBP_RESCALER_RFIX);
const v4i32 zero = { 0 };
@ -171,9 +171,10 @@ static WEBP_INLINE void ExportRowExpand_0(const uint32_t* frow, uint8_t* dst,
}
}
static WEBP_INLINE void ExportRowExpand_1(const uint32_t* frow, uint32_t* irow,
uint8_t* dst, int length,
WebPRescaler* const wrk) {
static WEBP_INLINE void ExportRowExpand_1(
const uint32_t* WEBP_RESTRICT frow, uint32_t* WEBP_RESTRICT irow,
uint8_t* WEBP_RESTRICT dst, int length,
WebPRescaler* WEBP_RESTRICT const wrk) {
const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub);
const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
const v4i32 B1 = __msa_fill_w(B);
@ -262,10 +263,10 @@ static void RescalerExportRowExpand_MIPSdspR2(WebPRescaler* const wrk) {
}
#if 0 // disabled for now. TODO(skal): make match the C-code
static WEBP_INLINE void ExportRowShrink_0(const uint32_t* frow, uint32_t* irow,
uint8_t* dst, int length,
const uint32_t yscale,
WebPRescaler* const wrk) {
static WEBP_INLINE void ExportRowShrink_0(
const uint32_t* WEBP_RESTRICT frow, uint32_t* WEBP_RESTRICT irow,
uint8_t* WEBP_RESTRICT dst, int length, const uint32_t yscale,
WebPRescaler* WEBP_RESTRICT const wrk) {
const v4u32 y_scale = (v4u32)__msa_fill_w(yscale);
const v4u32 fxyscale = (v4u32)__msa_fill_w(wrk->fxy_scale);
const v4u32 shiftval = (v4u32)__msa_fill_w(WEBP_RESCALER_RFIX);
@ -348,9 +349,9 @@ static WEBP_INLINE void ExportRowShrink_0(const uint32_t* frow, uint32_t* irow,
}
}
static WEBP_INLINE void ExportRowShrink_1(uint32_t* irow, uint8_t* dst,
int length,
WebPRescaler* const wrk) {
static WEBP_INLINE void ExportRowShrink_1(
uint32_t* WEBP_RESTRICT irow, uint8_t* WEBP_RESTRICT dst, int length,
WebPRescaler* WEBP_RESTRICT const wrk) {
const v4u32 scale = (v4u32)__msa_fill_w(wrk->fxy_scale);
const v4u32 shift = (v4u32)__msa_fill_w(WEBP_RESCALER_RFIX);
const v4i32 zero = { 0 };

4
src/dsp/rescaler_neon.c
View File

@ -45,8 +45,8 @@
#error "MULT_FIX/WEBP_RESCALER_RFIX need some more work"
#endif
static uint32x4_t Interpolate_NEON(const rescaler_t* const frow,
const rescaler_t* const irow,
static uint32x4_t Interpolate_NEON(const rescaler_t* WEBP_RESTRICT const frow,
const rescaler_t* WEBP_RESTRICT const irow,
uint32_t A, uint32_t B) {
LOAD_32x4(frow, A0);
LOAD_32x4(irow, B0);

18
src/dsp/rescaler_sse2.c
View File

@ -43,8 +43,8 @@ static void LoadEightPixels_SSE2(const uint8_t* const src, __m128i* out) {
*out = _mm_unpacklo_epi8(A, zero);
}
static void RescalerImportRowExpand_SSE2(WebPRescaler* const wrk,
const uint8_t* src) {
static void RescalerImportRowExpand_SSE2(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
rescaler_t* frow = wrk->frow;
const rescaler_t* const frow_end = frow + wrk->dst_width * wrk->num_channels;
const int x_add = wrk->x_add;
@ -109,8 +109,8 @@ static void RescalerImportRowExpand_SSE2(WebPRescaler* const wrk,
assert(accum == 0);
}
static void RescalerImportRowShrink_SSE2(WebPRescaler* const wrk,
const uint8_t* src) {
static void RescalerImportRowShrink_SSE2(WebPRescaler* WEBP_RESTRICT const wrk,
const uint8_t* WEBP_RESTRICT src) {
const int x_sub = wrk->x_sub;
int accum = 0;
const __m128i zero = _mm_setzero_si128();
@ -168,12 +168,10 @@ static void RescalerImportRowShrink_SSE2(WebPRescaler* const wrk,
// Row export
// load *src as epi64, multiply by mult and store result in [out0 ... out3]
static WEBP_INLINE void LoadDispatchAndMult_SSE2(const rescaler_t* const src,
const __m128i* const mult,
__m128i* const out0,
__m128i* const out1,
__m128i* const out2,
__m128i* const out3) {
static WEBP_INLINE void LoadDispatchAndMult_SSE2(
const rescaler_t* WEBP_RESTRICT const src, const __m128i* const mult,
__m128i* const out0, __m128i* const out1, __m128i* const out2,
__m128i* const out3) {
const __m128i A0 = _mm_loadu_si128((const __m128i*)(src + 0));
const __m128i A1 = _mm_loadu_si128((const __m128i*)(src + 4));
const __m128i A2 = _mm_srli_epi64(A0, 32);