add a simple abstraction for SIMD operations

1 files changed, 97 insertions, 0 deletions

diff --git a/src/pulsecore/vector.h b/src/pulsecore/vector.h
new file mode 100644
index 00000000..076bd6c0
--- /dev/null
+++ b/src/pulsecore/vector.h
@@ -0,0 +1,97 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio 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 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <inttypes.h>
+
+/* First, define HAVE_VECTOR if we have the gcc vector extensions at all */
+#if defined(__SSE2__) || defined(__ALTIVEC__)
+#define HAVE_VECTOR
+
+
+/* This is supposed to be portable to different SIMD instruction
+ * sets. We define vector types for different base types: uint8_t,
+ * int16_t, int32_t, float. The vector type is a union. The fields .i,
+ * .u, .f are arrays for accessing the separate elements of a
+ * vector. .v is a gcc vector type of the right format. .m is the
+ * vector in the type the SIMD extenstion specific intrinsics API
+ * expects. PA_xxx_VECTOR_SIZE is the size of the
+ * entries. PA_xxxx_VECTOR_MAKE constructs a gcc vector variable with
+ * the same value in all elements. */
+
+#ifdef __SSE2__
+
+#include <xmmintrin.h>
+#include <emmintrin.h>
+
+#define PA_UINT8_VECTOR_SIZE 16
+#define PA_INT16_VECTOR_SIZE 8
+#define PA_INT32_VECTOR_SIZE 4
+#define PA_FLOAT_VECTOR_SIZE 4
+
+#define PA_UINT8_VECTOR_MAKE(x) (pa_v16qi) { x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x }
+#define PA_INT16_VECTOR_MAKE(x) (pa_v8hi) { x, x, x, x, x, x, x, x }
+#define PA_INT32_VECTOR_MAKE(x) (pa_v4si) { x, x, x, x }
+#define PA_FLOAT_VECTOR_MAKE(x) (pa_v4fi) { x, x, x, x }
+
+#endif
+
+/* uint8_t vector */
+typedef uint8_t pa_v16qi __attribute__ ((vector_size (PA_UINT8_VECTOR_SIZE * sizeof(uint8_t))));
+typedef union pa_uint8_vector {
+    uint8_t u[PA_UINT8_VECTOR_SIZE];
+    pa_v16qi v;
+#ifdef __SSE2__
+    __m128i m;
+#endif
+} pa_uint8_vector_t;
+
+/* int16_t vector*/
+typedef int16_t pa_v8hi __attribute__ ((vector_size (PA_INT16_VECTOR_SIZE * sizeof(int16_t))));
+typedef union pa_int16_vector {
+    int16_t i[PA_INT16_VECTOR_SIZE];
+    pa_v8hi v;
+#ifdef __SSE2__
+    __m128i m;
+#endif
+} pa_int16_vector_t;
+
+/* int32_t vector */
+typedef int32_t pa_v4si __attribute__ ((vector_size (PA_INT32_VECTOR_SIZE * sizeof(int32_t))));
+typedef union pa_int32_vector {
+    int32_t i[PA_INT32_VECTOR_SIZE];
+    pa_v4si v;
+#ifdef __SSE2__
+    __m128i m;
+#endif
+} pa_int32_vector_t;
+
+/* float vector */
+typedef float pa_v4sf __attribute__ ((vector_size (PA_FLOAT_VECTOR_SIZE * sizeof(float))));
+typedef union pa_float_vector {
+    float f[PA_FLOAT_VECTOR_SIZE];
+    pa_v4sf v;
+#ifdef __SSE2__
+    __m128 m;
+#endif
+} pa_float_vector_t;
+
+#endif