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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
74 lines
2.0 KiB
C
74 lines
2.0 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_4_1.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_SSE4_1
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#include <smmintrin.h>
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/* 16*N 16-bit signed integer converted to single precision floats */
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void _sse_convert_si16_ps_16n(float *restrict out,
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const short *restrict in, int len)
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{
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__m128i m0, m1, m2, m3, m4, m5;
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__m128 m6, m7, m8, m9;
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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_si128((__m128i *) & in[16 * i + 0]);
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m1 = _mm_loadu_si128((__m128i *) & in[16 * i + 8]);
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/* Unpack */
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m2 = _mm_cvtepi16_epi32(m0);
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m4 = _mm_cvtepi16_epi32(m1);
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m0 = _mm_shuffle_epi32(m0, _MM_SHUFFLE(1, 0, 3, 2));
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m1 = _mm_shuffle_epi32(m1, _MM_SHUFFLE(1, 0, 3, 2));
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m3 = _mm_cvtepi16_epi32(m0);
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m5 = _mm_cvtepi16_epi32(m1);
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/* Convert */
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m6 = _mm_cvtepi32_ps(m2);
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m7 = _mm_cvtepi32_ps(m3);
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m8 = _mm_cvtepi32_ps(m4);
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m9 = _mm_cvtepi32_ps(m5);
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/* Store */
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_mm_storeu_ps(&out[16 * i + 0], m6);
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_mm_storeu_ps(&out[16 * i + 4], m7);
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_mm_storeu_ps(&out[16 * i + 8], m8);
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_mm_storeu_ps(&out[16 * i + 12], m9);
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}
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}
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/* 16*N 16-bit signed integer conversion with remainder */
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void _sse_convert_si16_ps(float *restrict out,
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const short *restrict in, int len)
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{
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int start = len / 16 * 16;
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_sse_convert_si16_ps_16n(out, in, len);
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for (int i = 0; i < len % 16; i++)
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out[start + i] = in[start + i];
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}
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#endif
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