Move the FIR4 from SSE2 to SSE3

SSE3 can avoid the slow _MM_TRANSPOSE_PS4 call thanks to the inclusion of
horizontal adds.

1 files changed, 93 insertions, 0 deletions

diff --git a/Alc/mixer_sse3.c b/Alc/mixer_sse3.c
new file mode 100644
index 00000000..ced90593
--- /dev/null
+++ b/Alc/mixer_sse3.c
@@ -0,0 +1,93 @@
+/**
+ * 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_32_SSE3(const ALfloat *src, ALuint frac, ALuint increment,
+                                     ALfloat *restrict dst, ALuint numsamples)
+{
+    const __m128i increment4 = _mm_set1_epi32(increment*4);
+    const __m128i fracMask4 = _mm_set1_epi32(FRACTIONMASK);
+    alignas(16) union { ALuint i[4]; float f[4]; } pos_;
+    alignas(16) union { ALuint i[4]; float f[4]; } frac_;
+    __m128i frac4, pos4;
+    ALuint pos;
+    ALuint 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(ResampleCoeffs.FIR4[frac_.i[0]]);
+        __m128 k1 = _mm_load_ps(ResampleCoeffs.FIR4[frac_.i[1]]);
+        __m128 k2 = _mm_load_ps(ResampleCoeffs.FIR4[frac_.i[2]]);
+        __m128 k3 = _mm_load_ps(ResampleCoeffs.FIR4[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));
+    }
+
+    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], frac);
+
+        frac += increment;
+        pos  += frac>>FRACTIONBITS;
+        frac &= FRACTIONMASK;
+    }
+    return dst;
+}