Replace the sinc4 resampler with cubic

Turns out the C version of the cubic resampler is just slightly faster than
even the SSE3 version of the FIR4 resampler. This is likely due to not using a
64KB random-access lookup table along with unaligned loads, both offseting the
gains from SSE.

1 files changed, 0 insertions, 98 deletions

diff --git a/Alc/mixer_sse3.c b/Alc/mixer_sse3.c
index d60fed5f..e69de29b 100644
--- a/Alc/mixer_sse3.c
+++ b/Alc/mixer_sse3.c
@@ -1,98 +0,0 @@
-/**
- * OpenAL cross platform audio library, SSE3 mixer functions
- *
- * Copyright (C) 2014 by Timothy Arceri <[email protected]>.
- * Copyright (C) 2015 by Chris Robinson <[email protected]>.
- *
- * This library is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU Library General Public
- *  License as published by the Free Software Foundation; either
- *  version 2 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
- *  Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library 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.
- * Or go to http://www.gnu.org/copyleft/lgpl.html
- */
-
-#include "config.h"
-
-#include <xmmintrin.h>
-#include <emmintrin.h>
-#include <pmmintrin.h>
-
-#include "alu.h"
-#include "mixer_defs.h"
-
-
-const ALfloat *Resample_fir4_SSE3(const InterpState *state,
-  const ALfloat *restrict src, ALsizei frac, ALint increment,
-  ALfloat *restrict dst, ALsizei numsamples)
-{
-    const ALfloat (*restrict filter)[4] = ASSUME_ALIGNED(state->sinc4.filter, 16);
-    const __m128i increment4 = _mm_set1_epi32(increment*4);
-    const __m128i fracMask4 = _mm_set1_epi32(FRACTIONMASK);
-    union { alignas(16) ALint i[4]; float f[4]; } pos_;
-    union { alignas(16) ALsizei i[4]; float f[4]; } frac_;
-    __m128i frac4, pos4;
-    ALint pos;
-    ALsizei i;
-
-    InitiatePositionArrays(frac, increment, frac_.i, pos_.i, 4);
-
-    frac4 = _mm_castps_si128(_mm_load_ps(frac_.f));
-    pos4 = _mm_castps_si128(_mm_load_ps(pos_.f));
-
-    --src;
-    for(i = 0;numsamples-i > 3;i += 4)
-    {
-        const __m128 val0 = _mm_loadu_ps(&src[pos_.i[0]]);
-        const __m128 val1 = _mm_loadu_ps(&src[pos_.i[1]]);
-        const __m128 val2 = _mm_loadu_ps(&src[pos_.i[2]]);
-        const __m128 val3 = _mm_loadu_ps(&src[pos_.i[3]]);
-        __m128 k0 = _mm_load_ps(filter[frac_.i[0]]);
-        __m128 k1 = _mm_load_ps(filter[frac_.i[1]]);
-        __m128 k2 = _mm_load_ps(filter[frac_.i[2]]);
-        __m128 k3 = _mm_load_ps(filter[frac_.i[3]]);
-        __m128 out;
-
-        k0 = _mm_mul_ps(k0, val0);
-        k1 = _mm_mul_ps(k1, val1);
-        k2 = _mm_mul_ps(k2, val2);
-        k3 = _mm_mul_ps(k3, val3);
-        k0 = _mm_hadd_ps(k0, k1);
-        k2 = _mm_hadd_ps(k2, k3);
-        out = _mm_hadd_ps(k0, k2);
-
-        _mm_store_ps(&dst[i], out);
-
-        frac4 = _mm_add_epi32(frac4, increment4);
-        pos4 = _mm_add_epi32(pos4, _mm_srli_epi32(frac4, FRACTIONBITS));
-        frac4 = _mm_and_si128(frac4, fracMask4);
-
-        _mm_store_ps(pos_.f, _mm_castsi128_ps(pos4));
-        _mm_store_ps(frac_.f, _mm_castsi128_ps(frac4));
-    }
-
-    /* NOTE: These four elements represent the position *after* the last four
-     * samples, so the lowest element is the next position to resample.
-     */
-    pos = pos_.i[0];
-    frac = frac_.i[0];
-
-    for(;i < numsamples;i++)
-    {
-        dst[i] = resample_fir4(src[pos], src[pos+1], src[pos+2], src[pos+3], filter[frac]);
-
-        frac += increment;
-        pos  += frac>>FRACTIONBITS;
-        frac &= FRACTIONMASK;
-    }
-    return dst;
-}