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/* Spa
*
* Copyright © 2018 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "fmt-ops.h"
#include <tmmintrin.h>
static void
conv_s24_to_f32d_4s_ssse3(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
uint32_t n_channels, uint32_t n_samples)
{
const int24_t *s = src;
float *d0 = dst[0], *d1 = dst[1], *d2 = dst[2], *d3 = dst[3];
uint32_t n, unrolled;
__m128i in[4];
__m128 out[4], factor = _mm_set1_ps(1.0f / S24_SCALE);
const __m128i mask = _mm_setr_epi8(-1, 0, 1, 2, -1, 3, 4, 5, -1, 6, 7, 8, -1, 9, 10, 11);
//const __m128i mask = _mm_set_epi8(15, 14, 13, -1, 12, 11, 10, -1, 9, 8, 7, -1, 6, 5, 4, -1);
if (SPA_IS_ALIGNED(d0, 16) &&
SPA_IS_ALIGNED(d1, 16) &&
SPA_IS_ALIGNED(d2, 16) &&
SPA_IS_ALIGNED(d3, 16))
unrolled = n_samples & ~3;
else
unrolled = 0;
for(n = 0; n < unrolled; n += 4) {
in[0] = _mm_loadu_si128((__m128i*)(s + 0*n_channels));
in[1] = _mm_loadu_si128((__m128i*)(s + 1*n_channels));
in[2] = _mm_loadu_si128((__m128i*)(s + 2*n_channels));
in[3] = _mm_loadu_si128((__m128i*)(s + 3*n_channels));
in[0] = _mm_shuffle_epi8(in[0], mask);
in[1] = _mm_shuffle_epi8(in[1], mask);
in[2] = _mm_shuffle_epi8(in[2], mask);
in[3] = _mm_shuffle_epi8(in[3], mask);
in[0] = _mm_srai_epi32(in[0], 8);
in[1] = _mm_srai_epi32(in[1], 8);
in[2] = _mm_srai_epi32(in[2], 8);
in[3] = _mm_srai_epi32(in[3], 8);
out[0] = _mm_cvtepi32_ps(in[0]);
out[1] = _mm_cvtepi32_ps(in[1]);
out[2] = _mm_cvtepi32_ps(in[2]);
out[3] = _mm_cvtepi32_ps(in[3]);
out[0] = _mm_mul_ps(out[0], factor);
out[1] = _mm_mul_ps(out[1], factor);
out[2] = _mm_mul_ps(out[2], factor);
out[3] = _mm_mul_ps(out[3], factor);
_MM_TRANSPOSE4_PS(out[0], out[1], out[2], out[3]);
_mm_store_ps(&d0[n], out[0]);
_mm_store_ps(&d1[n], out[1]);
_mm_store_ps(&d2[n], out[2]);
_mm_store_ps(&d3[n], out[3]);
s += 4 * n_channels;
}
for(; n < n_samples; n++) {
out[0] = _mm_cvtsi32_ss(factor, s24_to_s32(*s));
out[1] = _mm_cvtsi32_ss(factor, s24_to_s32(*(s+1)));
out[2] = _mm_cvtsi32_ss(factor, s24_to_s32(*(s+2)));
out[3] = _mm_cvtsi32_ss(factor, s24_to_s32(*(s+3)));
out[0] = _mm_mul_ss(out[0], factor);
out[1] = _mm_mul_ss(out[1], factor);
out[2] = _mm_mul_ss(out[2], factor);
out[3] = _mm_mul_ss(out[3], factor);
_mm_store_ss(&d0[n], out[0]);
_mm_store_ss(&d1[n], out[1]);
_mm_store_ss(&d2[n], out[2]);
_mm_store_ss(&d3[n], out[3]);
s += n_channels;
}
}
void
conv_s24_to_f32d_1s_sse2(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
uint32_t n_channels, uint32_t n_samples);
void
conv_s24_to_f32d_ssse3(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
uint32_t n_samples)
{
const int8_t *s = src[0];
uint32_t i = 0, n_channels = conv->n_channels;
for(; i + 3 < n_channels; i += 4)
conv_s24_to_f32d_4s_ssse3(conv, &dst[i], &s[3*i], n_channels, n_samples);
for(; i < n_channels; i++)
conv_s24_to_f32d_1s_sse2(conv, &dst[i], &s[3*i], n_channels, n_samples);
}
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