1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/webrtc/src/webrtc/common_audio/signal_processing/vector_scaling_operations_mips.c b/third_party/webrtc/src/webrtc/common_audio/signal_processing/vector_scaling_operations_mips.c
new file mode 100644
index 00000000..dd73eeae
--- /dev/null
+++ b/third_party/webrtc/src/webrtc/common_audio/signal_processing/vector_scaling_operations_mips.c
@@ -0,0 +1,57 @@
+/*
+ *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+/*
+ * This file contains implementations of the functions
+ * WebRtcSpl_ScaleAndAddVectorsWithRound_mips()
+ */
+
+#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
+
+int WebRtcSpl_ScaleAndAddVectorsWithRound_mips(const int16_t* in_vector1,
+                                               int16_t in_vector1_scale,
+                                               const int16_t* in_vector2,
+                                               int16_t in_vector2_scale,
+                                               int right_shifts,
+                                               int16_t* out_vector,
+                                               size_t length) {
+  int16_t r0 = 0, r1 = 0;
+  int16_t *in1 = (int16_t*)in_vector1;
+  int16_t *in2 = (int16_t*)in_vector2;
+  int16_t *out = out_vector;
+  size_t i = 0;
+  int value32 = 0;
+
+  if (in_vector1 == NULL || in_vector2 == NULL || out_vector == NULL ||
+      length == 0 || right_shifts < 0) {
+    return -1;
+  }
+  for (i = 0; i < length; i++) {
+    __asm __volatile (
+      "lh         %[r0],          0(%[in1])                               \n\t"
+      "lh         %[r1],          0(%[in2])                               \n\t"
+      "mult       %[r0],          %[in_vector1_scale]                     \n\t"
+      "madd       %[r1],          %[in_vector2_scale]                     \n\t"
+      "extrv_r.w  %[value32],     $ac0,               %[right_shifts]     \n\t"
+      "addiu      %[in1],         %[in1],             2                   \n\t"
+      "addiu      %[in2],         %[in2],             2                   \n\t"
+      "sh         %[value32],     0(%[out])                               \n\t"
+      "addiu      %[out],         %[out],             2                   \n\t"
+      : [value32] "=&r" (value32), [out] "+r" (out), [in1] "+r" (in1),
+        [in2] "+r" (in2), [r0] "=&r" (r0), [r1] "=&r" (r1)
+      : [in_vector1_scale] "r" (in_vector1_scale),
+        [in_vector2_scale] "r" (in_vector2_scale),
+        [right_shifts] "r" (right_shifts)
+      : "hi", "lo", "memory"
+    );
+  }
+  return 0;
+}