| /* |
| * 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_3.h" |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifdef HAVE_SSE3 |
| #include <xmmintrin.h> |
| #include <emmintrin.h> |
| |
| /* 8*N single precision floats scaled and converted to 16-bit signed integer */ |
| void _sse_convert_scale_ps_si16_8n(short *restrict out, |
| const 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 */ |
| void _sse_convert_scale_ps_si16(short *restrict out, |
| const 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 */ |
| void _sse_convert_scale_ps_si16_16n(short *restrict out, |
| const 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); |
| } |
| } |
| #endif |