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resample: use some extra accumulators to improve pipelining

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This commit is contained in:
Wim Taymans 2026-04-23 09:32:31 +02:00
parent 75e432a49a
commit 596047aaef
3 changed files with 25 additions and 16 deletions
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11
spa/plugins/audioconvert/resample-native-avx2.c
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@ -40,8 +40,9 @@ static inline void inner_product_ip_avx2(float *d, const float * SPA_RESTRICT s,
const float * SPA_RESTRICT t0, const float * SPA_RESTRICT t1, float x,
uint32_t n_taps)
{
__m256 sy[2] = { _mm256_setzero_ps(), _mm256_setzero_ps() }, ty;
__m128 sx[2], tx;
__m256 sy[4] = { _mm256_setzero_ps(), _mm256_setzero_ps(),
_mm256_setzero_ps(), _mm256_setzero_ps() }, ty;
__m128 sx[4], tx;
uint32_t i, n_taps4 = n_taps & ~0xf;
for (i = 0; i < n_taps4; i += 16) {
@ -49,9 +50,11 @@ static inline void inner_product_ip_avx2(float *d, const float * SPA_RESTRICT s,
sy[0] = _mm256_fmadd_ps(ty, _mm256_load_ps(t0 + i + 0), sy[0]);
sy[1] = _mm256_fmadd_ps(ty, _mm256_load_ps(t1 + i + 0), sy[1]);
ty = _mm256_loadu_ps(s + i + 8);
sy[0] = _mm256_fmadd_ps(ty, _mm256_load_ps(t0 + i + 8), sy[0]);
sy[1] = _mm256_fmadd_ps(ty, _mm256_load_ps(t1 + i + 8), sy[1]);
sy[2] = _mm256_fmadd_ps(ty, _mm256_load_ps(t0 + i + 8), sy[2]);
sy[3] = _mm256_fmadd_ps(ty, _mm256_load_ps(t1 + i + 8), sy[3]);
}
sy[0] = _mm256_add_ps(sy[0], sy[2]);
sy[1] = _mm256_add_ps(sy[1], sy[3]);
sx[0] = _mm_add_ps(_mm256_extractf128_ps(sy[0], 0), _mm256_extractf128_ps(sy[0], 1));
sx[1] = _mm_add_ps(_mm256_extractf128_ps(sy[1], 0), _mm256_extractf128_ps(sy[1], 1));