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Diffstat (limited to 'Transceiver52M/x86/convert.c')
| -rw-r--r-- | Transceiver52M/x86/convert.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/Transceiver52M/x86/convert.c b/Transceiver52M/x86/convert.c new file mode 100644 index 0000000..1d2f208 --- /dev/null +++ b/Transceiver52M/x86/convert.c @@ -0,0 +1,200 @@ +/* + * SSE type conversions + * Copyright (C) 2013 Thomas Tsou <tom@tsou.cc> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <malloc.h> +#include <string.h> +#include "convert.h" + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef HAVE_SSE3 +#include <xmmintrin.h> +#include <emmintrin.h> + +#ifdef HAVE_SSE4_1 +#include <smmintrin.h> + +/* 16*N 16-bit signed integer converted to single precision floats */ +static void _sse_convert_si16_ps_16n(float *restrict out, + short *restrict in, + int len) +{ + __m128i m0, m1, m2, m3, m4, m5; + __m128 m6, m7, m8, m9; + + for (int i = 0; i < len / 16; i++) { + /* Load (unaligned) packed floats */ + m0 = _mm_loadu_si128((__m128i *) &in[16 * i + 0]); + m1 = _mm_loadu_si128((__m128i *) &in[16 * i + 8]); + + /* Unpack */ + m2 = _mm_cvtepi16_epi32(m0); + m4 = _mm_cvtepi16_epi32(m1); + m0 = _mm_shuffle_epi32(m0, _MM_SHUFFLE(1, 0, 3, 2)); + m1 = _mm_shuffle_epi32(m1, _MM_SHUFFLE(1, 0, 3, 2)); + m3 = _mm_cvtepi16_epi32(m0); + m5 = _mm_cvtepi16_epi32(m1); + + /* Convert */ + m6 = _mm_cvtepi32_ps(m2); + m7 = _mm_cvtepi32_ps(m3); + m8 = _mm_cvtepi32_ps(m4); + m9 = _mm_cvtepi32_ps(m5); + + /* Store */ + _mm_storeu_ps(&out[16 * i + 0], m6); + _mm_storeu_ps(&out[16 * i + 4], m7); + _mm_storeu_ps(&out[16 * i + 8], m8); + _mm_storeu_ps(&out[16 * i + 12], m9); + } +} + +/* 16*N 16-bit signed integer conversion with remainder */ +static void _sse_convert_si16_ps(float *restrict out, + short *restrict in, + int len) +{ + int start = len / 16 * 16; + + _sse_convert_si16_ps_16n(out, in, len); + + for (int i = 0; i < len % 16; i++) + out[start + i] = in[start + i]; +} +#endif /* HAVE_SSE4_1 */ + +/* 8*N single precision floats scaled and converted to 16-bit signed integer */ +static void _sse_convert_scale_ps_si16_8n(short *restrict out, + float *restrict in, + float scale, int len) +{ + __m128 m0, m1, m2; + __m128i m4, m5; + + for (int i = 0; i < len / 8; i++) { + /* Load (unaligned) packed floats */ + m0 = _mm_loadu_ps(&in[8 * i + 0]); + m1 = _mm_loadu_ps(&in[8 * i + 4]); + m2 = _mm_load1_ps(&scale); + + /* Scale */ + m0 = _mm_mul_ps(m0, m2); + m1 = _mm_mul_ps(m1, m2); + + /* Convert */ + m4 = _mm_cvtps_epi32(m0); + m5 = _mm_cvtps_epi32(m1); + + /* Pack and store */ + m5 = _mm_packs_epi32(m4, m5); + _mm_storeu_si128((__m128i *) &out[8 * i], m5); + } +} + +/* 8*N single precision floats scaled and converted with remainder */ +static void _sse_convert_scale_ps_si16(short *restrict out, + float *restrict in, + float scale, int len) +{ + int start = len / 8 * 8; + + _sse_convert_scale_ps_si16_8n(out, in, scale, len); + + for (int i = 0; i < len % 8; i++) + out[start + i] = in[start + i] * scale; +} + +/* 16*N single precision floats scaled and converted to 16-bit signed integer */ +static void _sse_convert_scale_ps_si16_16n(short *restrict out, + float *restrict in, + float scale, int len) +{ + __m128 m0, m1, m2, m3, m4; + __m128i m5, m6, m7, m8; + + for (int i = 0; i < len / 16; i++) { + /* Load (unaligned) packed floats */ + m0 = _mm_loadu_ps(&in[16 * i + 0]); + m1 = _mm_loadu_ps(&in[16 * i + 4]); + m2 = _mm_loadu_ps(&in[16 * i + 8]); + m3 = _mm_loadu_ps(&in[16 * i + 12]); + m4 = _mm_load1_ps(&scale); + + /* Scale */ + m0 = _mm_mul_ps(m0, m4); + m1 = _mm_mul_ps(m1, m4); + m2 = _mm_mul_ps(m2, m4); + m3 = _mm_mul_ps(m3, m4); + + /* Convert */ + m5 = _mm_cvtps_epi32(m0); + m6 = _mm_cvtps_epi32(m1); + m7 = _mm_cvtps_epi32(m2); + m8 = _mm_cvtps_epi32(m3); + + /* Pack and store */ + m5 = _mm_packs_epi32(m5, m6); + m7 = _mm_packs_epi32(m7, m8); + _mm_storeu_si128((__m128i *) &out[16 * i + 0], m5); + _mm_storeu_si128((__m128i *) &out[16 * i + 8], m7); + } +} +#else /* HAVE_SSE3 */ +static void convert_scale_ps_si16(short *out, float *in, float scale, int len) +{ + for (int i = 0; i < len; i++) + out[i] = in[i] * scale; +} +#endif + +#ifndef HAVE_SSE3 +static void convert_si16_ps(float *out, short *in, int len) +{ + for (int i = 0; i < len; i++) + out[i] = in[i]; +} +#endif + +void convert_float_short(short *out, float *in, float scale, int len) +{ +#ifdef HAVE_SSE3 + if (!(len % 16)) + _sse_convert_scale_ps_si16_16n(out, in, scale, len); + else if (!(len % 8)) + _sse_convert_scale_ps_si16_8n(out, in, scale, len); + else + _sse_convert_scale_ps_si16(out, in, scale, len); +#else + convert_scale_ps_si16(out, in, scale, len); +#endif +} + +void convert_short_float(float *out, short *in, int len) +{ +#ifdef HAVE_SSE4_1 + if (!(len % 16)) + _sse_convert_si16_ps_16n(out, in, len); + else + _sse_convert_si16_ps(out, in, len); +#else + convert_si16_ps(out, in, len); +#endif +} |