1 files changed, 87 insertions, 0 deletions
diff --git a/spa/plugins/audiomixer/mix-ops-sse2.c b/spa/plugins/audiomixer/mix-ops-sse2.c
new file mode 100644
index 0000000..e2f632d
--- /dev/null
+++ b/spa/plugins/audiomixer/mix-ops-sse2.c
@@ -0,0 +1,87 @@
+/* Spa
+ *
+ * Copyright © 2019 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <math.h>
+
+#include <spa/utils/defs.h>
+
+#include "mix-ops.h"
+
+#include <emmintrin.h>
+
+void
+mix_f64_sse2(struct mix_ops *ops, void * SPA_RESTRICT dst, const void * SPA_RESTRICT src[],
+		uint32_t n_src, uint32_t n_samples)
+{
+	n_samples *= ops->n_channels;
+
+	if (n_src == 0) {
+		memset(dst, 0, n_samples * sizeof(double));
+	} else if (n_src == 1) {
+		if (dst != src[0])
+			spa_memcpy(dst, src[0], n_samples * sizeof(double));
+	} else {
+		uint32_t n, i, unrolled;
+		__m128d in[4];
+		const double **s = (const double **)src;
+		double *d = dst;
+
+		if (SPA_LIKELY(SPA_IS_ALIGNED(dst, 16))) {
+			unrolled = n_samples & ~15;
+			for (i = 0; i < n_src; i++) {
+				if (SPA_UNLIKELY(!SPA_IS_ALIGNED(src[i], 16))) {
+					unrolled = 0;
+					break;
+				}
+			}
+		} else
+			unrolled = 0;
+
+		for (n = 0; n < unrolled; n += 8) {
+			in[0] = _mm_load_pd(&s[0][n+0]);
+			in[1] = _mm_load_pd(&s[0][n+2]);
+			in[2] = _mm_load_pd(&s[0][n+4]);
+			in[3] = _mm_load_pd(&s[0][n+6]);
+
+			for (i = 1; i < n_src; i++) {
+				in[0] = _mm_add_pd(in[0], _mm_load_pd(&s[i][n+0]));
+				in[1] = _mm_add_pd(in[1], _mm_load_pd(&s[i][n+2]));
+				in[2] = _mm_add_pd(in[2], _mm_load_pd(&s[i][n+4]));
+				in[3] = _mm_add_pd(in[3], _mm_load_pd(&s[i][n+6]));
+			}
+			_mm_store_pd(&d[n+0], in[0]);
+			_mm_store_pd(&d[n+2], in[1]);
+			_mm_store_pd(&d[n+4], in[2]);
+			_mm_store_pd(&d[n+6], in[3]);
+		}
+		for (; n < n_samples; n++) {
+			in[0] = _mm_load_sd(&s[0][n]);
+			for (i = 1; i < n_src; i++)
+				in[0] = _mm_add_sd(in[0], _mm_load_sd(&s[i][n]));
+			_mm_store_sd(&d[n], in[0]);
+		}
+	}
+}