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alpha_processing*: use WEBP_RESTRICT qualifier

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this helps both auto-vectorization in the C code and the optimized code
generation

Change-Id: Ide570d6be45125ffef7248bdc40e9eb08f00e832
This commit is contained in:
James Zern
2021-07-03 17:43:11 -07:00
parent a2e18f10eb
commit a1e5dae0f0
4 changed files with 54 additions and 37 deletions
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22
src/dsp/alpha_processing_neon.c
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@ -16,6 +16,7 @@
#if defined(WEBP_USE_NEON)
#include "src/dsp/neon.h"
#include "src/utils/utils.h"
//------------------------------------------------------------------------------
@ -80,9 +81,9 @@ static void ApplyAlphaMultiply_NEON(uint8_t* rgba, int alpha_first,
//------------------------------------------------------------------------------
static int DispatchAlpha_NEON(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint8_t* dst, int dst_stride) {
static int DispatchAlpha_NEON(const uint8_t* WEBP_RESTRICT alpha,
int alpha_stride, int width, int height,
uint8_t* WEBP_RESTRICT dst, int dst_stride) {
uint32_t alpha_mask = 0xffffffffu;
uint8x8_t mask8 = vdup_n_u8(0xff);
uint32_t tmp[2];
@ -112,9 +113,10 @@ static int DispatchAlpha_NEON(const uint8_t* alpha, int alpha_stride,
return (alpha_mask != 0xffffffffu);
}
static void DispatchAlphaToGreen_NEON(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint32_t* dst, int dst_stride) {
static void DispatchAlphaToGreen_NEON(const uint8_t* WEBP_RESTRICT alpha,
int alpha_stride, int width, int height,
uint32_t* WEBP_RESTRICT dst,
int dst_stride) {
int i, j;
uint8x8x4_t greens; // leave A/R/B channels zero'd.
greens.val[0] = vdup_n_u8(0);
@ -131,9 +133,9 @@ static void DispatchAlphaToGreen_NEON(const uint8_t* alpha, int alpha_stride,
}
}
static int ExtractAlpha_NEON(const uint8_t* argb, int argb_stride,
static int ExtractAlpha_NEON(const uint8_t* WEBP_RESTRICT argb, int argb_stride,
int width, int height,
uint8_t* alpha, int alpha_stride) {
uint8_t* WEBP_RESTRICT alpha, int alpha_stride) {
uint32_t alpha_mask = 0xffffffffu;
uint8x8_t mask8 = vdup_n_u8(0xff);
uint32_t tmp[2];
@ -161,8 +163,8 @@ static int ExtractAlpha_NEON(const uint8_t* argb, int argb_stride,
return (alpha_mask == 0xffffffffu);
}
static void ExtractGreen_NEON(const uint32_t* argb,
uint8_t* alpha, int size) {
static void ExtractGreen_NEON(const uint32_t* WEBP_RESTRICT argb,
uint8_t* WEBP_RESTRICT alpha, int size) {
int i;
for (i = 0; i + 16 <= size; i += 16) {
const uint8x16x4_t rgbX = vld4q_u8((const uint8_t*)(argb + i));