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73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* Spa */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#include "fmt-ops.h"
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#include <smmintrin.h>
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#define spa_read_unaligned(ptr, type) \
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__extension__ ({ \
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__typeof__(type) _val; \
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memcpy(&_val, (ptr), sizeof(_val)); \
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_val; \
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})
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static void
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conv_s24_to_f32d_1s_sse41(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples)
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{
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const int24_t *s = src;
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float *d0 = dst[0];
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uint32_t n, unrolled;
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__m128i in = _mm_setzero_si128();
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__m128 out, factor = _mm_set1_ps(1.0f / S24_SCALE);
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if (SPA_IS_ALIGNED(d0, 16))
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unrolled = n_samples & ~3;
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else
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unrolled = 0;
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for(n = 0; n < unrolled; n += 4) {
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in = _mm_insert_epi32(in, spa_read_unaligned(&s[0 * n_channels], uint32_t), 0);
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in = _mm_insert_epi32(in, spa_read_unaligned(&s[1 * n_channels], uint32_t), 1);
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in = _mm_insert_epi32(in, spa_read_unaligned(&s[2 * n_channels], uint32_t), 2);
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in = _mm_insert_epi32(in, spa_read_unaligned(&s[3 * n_channels], uint32_t), 3);
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in = _mm_slli_epi32(in, 8);
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in = _mm_srai_epi32(in, 8);
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out = _mm_cvtepi32_ps(in);
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out = _mm_mul_ps(out, factor);
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_mm_store_ps(&d0[n], out);
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s += 4 * n_channels;
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}
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for(; n < n_samples; n++) {
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out = _mm_cvtsi32_ss(factor, s24_to_s32(*s));
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out = _mm_mul_ss(out, factor);
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_mm_store_ss(&d0[n], out);
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s += n_channels;
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}
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}
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extern void conv_s24_to_f32d_2s_sse2(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples);
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extern void conv_s24_to_f32d_4s_ssse3(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples);
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void
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conv_s24_to_f32d_sse41(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
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uint32_t n_samples)
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{
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const int8_t *s = src[0];
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uint32_t i = 0, n_channels = conv->n_channels;
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#if defined (HAVE_SSSE3)
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for(; i + 3 < n_channels; i += 4)
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conv_s24_to_f32d_4s_ssse3(conv, &dst[i], &s[3*i], n_channels, n_samples);
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#endif
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#if defined (HAVE_SSE2)
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for(; i + 1 < n_channels; i += 2)
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conv_s24_to_f32d_2s_sse2(conv, &dst[i], &s[3*i], n_channels, n_samples);
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#endif
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for(; i < n_channels; i++)
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conv_s24_to_f32d_1s_sse41(conv, &dst[i], &s[3*i], n_channels, n_samples);
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}
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