ltpf: Move analysis to fixed point

test/neon/neon.h

@@ -0,0 +1,141 @@
+/******************************************************************************
+ *
+ *  Copyright 2022 Google LLC
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at:
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ ******************************************************************************/
+
+#if __ARM_NEON
+
+#include <arm_neon.h>
+
+#else
+#define __ARM_NEON 1
+
+#include <stdint.h>
+
+typedef struct { int16_t e[4]; } int16x4_t;
+
+typedef struct { int16_t e[8]; } int16x8_t;
+typedef struct { int32_t e[4]; } int32x4_t;
+typedef struct { int64_t e[2]; } int64x2_t;
+
+
+/* ----------------------------------------------------------------------------
+ *  Load / Store
+ * -------------------------------------------------------------------------- */
+
+__attribute__((unused))
+static int16x4_t vld1_s16(const int16_t *p)
+{
+    int16x4_t r;
+
+    for (int i = 0; i < 4; i++)
+        r.e[i] = *(p++);
+
+    return r;
+}
+
+__attribute__((unused))
+static int64x2_t vmovq_n_s64(int64_t v)
+{
+    int64x2_t r;
+
+    r.e[0] = v;
+    r.e[1] = v;
+
+    return r;
+}
+
+
+/* ----------------------------------------------------------------------------
+ *  Move
+ * -------------------------------------------------------------------------- */
+
+__attribute__((unused))
+static int32x4_t vmovq_n_s32(uint32_t v)
+{
+    int32x4_t r;
+
+    for (int i = 0; i < 4; i++)
+        r.e[i] = v;
+
+    return r;
+}
+
+__attribute__((unused))
+static int16x4_t vext_s16(int16x4_t a, int16x4_t b, const int n)
+{
+    int16x4_t r;
+    int i = 0;
+
+    for (; i < n; i++) r.e[3-i] = b.e[(n-1)-i];
+    for (; i < 4; i++) r.e[3-i] = a.e[3-(i-n)];
+
+    return r;
+}
+
+/* ----------------------------------------------------------------------------
+ *  Arithmetic
+ * -------------------------------------------------------------------------- */
+
+__attribute__((unused))
+static int32x4_t vmull_s16(int16x4_t a, int16x4_t b)
+{
+    int32x4_t r;
+
+    for (int i = 0; i < 4; i++)
+        r.e[i] = (int32_t)a.e[i] * b.e[i];
+
+    return r;
+}
+
+__attribute__((unused))
+static int32x4_t vmlal_s16(int32x4_t r, int16x4_t a, int16x4_t b)
+{
+    for (int i = 0; i < 4; i++)
+        r.e[i] += (int32_t)a.e[i] * b.e[i];
+
+    return r;
+}
+
+__attribute__((unused))
+static int64x2_t vpadalq_s32(int64x2_t a, int32x4_t b)
+{
+    int64x2_t r;
+
+    r.e[0] = a.e[0] + ((int64_t)b.e[0] + b.e[1]);
+    r.e[1] = a.e[1] + ((int64_t)b.e[2] + b.e[3]);
+
+    return r;
+}
+
+
+/* ----------------------------------------------------------------------------
+ *  Reduce
+ * -------------------------------------------------------------------------- */
+
+__attribute__((unused))
+static int32_t vaddvq_s32(int32x4_t v)
+{
+    return v.e[0] + v.e[1] + v.e[2] + v.e[3];
+}
+
+__attribute__((unused))
+static int64_t vaddvq_s64(int64x2_t v)
+{
+    return v.e[0] + v.e[1];
+}
+
+#endif /* __ARM_NEON */