| /* |
| * 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_sse_4_1.h" |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifdef HAVE_SSE4_1 |
| #include <smmintrin.h> |
| |
| /* 16*N 16-bit signed integer converted to single precision floats */ |
| void _sse_convert_si16_ps_16n(float *restrict out, |
| const 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 */ |
| void _sse_convert_si16_ps(float *restrict out, |
| const 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 |