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resample-peaks: unroll loop a little

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This commit is contained in:
Wim Taymans 2022-09-07 16:18:58 +02:00
parent 187006f30e
commit c9ee142b78
1 changed files with 9 additions and 6 deletions
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15
spa/plugins/audioconvert/resample-peaks-sse.c
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@ -39,7 +39,7 @@ static inline float hmax_ps(__m128 val)
static inline float find_abs_max_sse(const float *s, uint32_t n_samples, float m) static inline float find_abs_max_sse(const float *s, uint32_t n_samples, float m)
{ {
__m128 in, max; __m128 in[2], max;
uint32_t n, unrolled; uint32_t n, unrolled;
const __m128 mask = _mm_andnot_ps( const __m128 mask = _mm_andnot_ps(
_mm_set_ps1(-0.0f), _mm_set_ps1(-0.0f),
@ -47,12 +47,15 @@ static inline float find_abs_max_sse(const float *s, uint32_t n_samples, float m
max = _mm_set1_ps(m); max = _mm_set1_ps(m);
unrolled = n_samples & ~3; unrolled = n_samples & ~7;
for (n = 0; n < unrolled; n+=4) { for (n = 0; n < unrolled; n += 8) {
in = _mm_loadu_ps(&s[n]); in[0] = _mm_loadu_ps(&s[n + 0]);
in = _mm_and_ps(mask, in); in[1] = _mm_loadu_ps(&s[n + 4]);
max = _mm_max_ps(in, max); in[0] = _mm_and_ps(mask, in[0]);
in[1] = _mm_and_ps(mask, in[1]);
max = _mm_max_ps(in[0], max);
max = _mm_max_ps(in[1], max);
} }
for (; n < n_samples; n++) for (; n < n_samples; n++)
m = fmaxf(fabsf(s[n]), m); m = fmaxf(fabsf(s[n]), m);