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424c74d006
Remove the paragraph about writing to the Free Software Foundation's mailing address. The FSF has changed addresses in the past, and may do so again. In 2021 this is not useful, let's rather have a bit less boilerplate at the start of source files. Change-Id: I8ba71ab9ccde4ba25151ecbeb2a323f706b57d43
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* SSE type conversions
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* Copyright (C) 2013 Thomas Tsou <tom@tsou.cc>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*/
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#include <malloc.h>
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#include <string.h>
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#include "convert_sse_3.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_SSE3
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#include <xmmintrin.h>
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#include <emmintrin.h>
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/* 8*N single precision floats scaled and converted to 16-bit signed integer */
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void _sse_convert_scale_ps_si16_8n(short *restrict out,
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const float *restrict in,
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float scale, int len)
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{
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__m128 m0, m1, m2;
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__m128i m4, m5;
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for (int i = 0; i < len / 8; i++) {
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/* Load (unaligned) packed floats */
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m0 = _mm_loadu_ps(&in[8 * i + 0]);
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m1 = _mm_loadu_ps(&in[8 * i + 4]);
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m2 = _mm_load1_ps(&scale);
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/* Scale */
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m0 = _mm_mul_ps(m0, m2);
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m1 = _mm_mul_ps(m1, m2);
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/* Convert */
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m4 = _mm_cvtps_epi32(m0);
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m5 = _mm_cvtps_epi32(m1);
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/* Pack and store */
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m5 = _mm_packs_epi32(m4, m5);
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_mm_storeu_si128((__m128i *) & out[8 * i], m5);
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}
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}
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/* 8*N single precision floats scaled and converted with remainder */
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void _sse_convert_scale_ps_si16(short *restrict out,
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const float *restrict in, float scale, int len)
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{
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int start = len / 8 * 8;
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_sse_convert_scale_ps_si16_8n(out, in, scale, len);
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for (int i = 0; i < len % 8; i++)
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out[start + i] = in[start + i] * scale;
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}
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/* 16*N single precision floats scaled and converted to 16-bit signed integer */
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void _sse_convert_scale_ps_si16_16n(short *restrict out,
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const float *restrict in,
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float scale, int len)
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{
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__m128 m0, m1, m2, m3, m4;
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__m128i m5, m6, m7, m8;
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for (int i = 0; i < len / 16; i++) {
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/* Load (unaligned) packed floats */
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m0 = _mm_loadu_ps(&in[16 * i + 0]);
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m1 = _mm_loadu_ps(&in[16 * i + 4]);
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m2 = _mm_loadu_ps(&in[16 * i + 8]);
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m3 = _mm_loadu_ps(&in[16 * i + 12]);
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m4 = _mm_load1_ps(&scale);
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/* Scale */
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m0 = _mm_mul_ps(m0, m4);
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m1 = _mm_mul_ps(m1, m4);
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m2 = _mm_mul_ps(m2, m4);
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m3 = _mm_mul_ps(m3, m4);
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/* Convert */
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m5 = _mm_cvtps_epi32(m0);
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m6 = _mm_cvtps_epi32(m1);
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m7 = _mm_cvtps_epi32(m2);
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m8 = _mm_cvtps_epi32(m3);
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/* Pack and store */
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m5 = _mm_packs_epi32(m5, m6);
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m7 = _mm_packs_epi32(m7, m8);
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_mm_storeu_si128((__m128i *) & out[16 * i + 0], m5);
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_mm_storeu_si128((__m128i *) & out[16 * i + 8], m7);
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}
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}
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#endif
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