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sw_engine : arm neonRasterGrayscale8 function to support aarch64

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Improved the speed through neon processing.

Improvements Rate:
Lottie: (0.025986/0.026201) = +4.7%
Performance: (0.014163/0.014785) = +4.3%

issue: https://github.com/thorvg/thorvg/issues/30
This commit is contained in:
rinechran 2024-05-03 01:01:17 +09:00 • committed by Hermet Park
parent c8551d4856
commit c1394668ef
1 changed files with 17 additions and 3 deletions
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20
src/renderer/sw_engine/tvgSwRasterNeon.h
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@ -24,6 +24,15 @@
#include <arm_neon.h>
//TODO : need to support windows ARM
#if defined(__ARM_64BIT_STATE) || defined(_M_ARM64)
#define TVG_AARCH64 1
#else
#define TVG_AARCH64 0
#endif
static inline uint8x8_t ALPHA_BLEND(uint8x8_t c, uint8x8_t a)
{
uint16x8_t t = vmull_u8(c, a);
@ -36,12 +45,17 @@ static void neonRasterGrayscale8(uint8_t* dst, uint8_t val, uint32_t offset, int
dst += offset;
int32_t i = 0;
uint8x16_t valVec = vdupq_n_u8(val);
const uint8x16_t valVec = vdupq_n_u8(val);
#if TVG_AARCH64
uint8x16x4_t valQuad = {valVec, valVec, valVec, valVec};
for (; i <= len - 16 * 4; i += 16 * 4) {
vst1q_u8_x4(dst + i, valQuad);
}
#else
for (; i <= len - 16; i += 16) {
vst1q_u8(dst + i, valVec);
}
#endif
for (; i < len; i++) {
dst[i] = val;
}