diff -r 000000000000 -r 6474c204b198 content/media/AudioNodeEngineNEON.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/AudioNodeEngineNEON.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,225 @@
+/* -*- mode: c++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* this source code form is subject to the terms of the mozilla public
+ * license, v. 2.0. if a copy of the mpl was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "AudioNodeEngineNEON.h"
+#include <arm_neon.h>
+
+//#ifdef DEBUG
+#if 0 // see bug 921099
+  #define ASSERT_ALIGNED(ptr)                                                  \
+            MOZ_ASSERT((((uintptr_t)ptr + 15) & ~0x0F) == (uintptr_t)ptr,      \
+                       #ptr " has to be aligned 16-bytes aligned.");
+#else
+  #define ASSERT_ALIGNED(ptr)
+#endif
+
+#define ADDRESS_OF(array, index) ((float32_t*)&array[index])
+
+namespace mozilla {
+void AudioBufferAddWithScale_NEON(const float* aInput,
+                                  float aScale,
+                                  float* aOutput,
+                                  uint32_t aSize)
+{
+  ASSERT_ALIGNED(aInput);
+  ASSERT_ALIGNED(aOutput);
+
+  float32x4_t vin0, vin1, vin2, vin3;
+  float32x4_t vout0, vout1, vout2, vout3;
+  float32x4_t vscale = vmovq_n_f32(aScale);
+
+  uint32_t dif = aSize % 16;
+  aSize -= dif;
+  unsigned i = 0;
+  for (; i < aSize; i+=16) {
+    vin0 = vld1q_f32(ADDRESS_OF(aInput, i));
+    vin1 = vld1q_f32(ADDRESS_OF(aInput, i+4));
+    vin2 = vld1q_f32(ADDRESS_OF(aInput, i+8));
+    vin3 = vld1q_f32(ADDRESS_OF(aInput, i+12));
+
+    vout0 = vld1q_f32(ADDRESS_OF(aOutput, i));
+    vout1 = vld1q_f32(ADDRESS_OF(aOutput, i+4));
+    vout2 = vld1q_f32(ADDRESS_OF(aOutput, i+8));
+    vout3 = vld1q_f32(ADDRESS_OF(aOutput, i+12));
+
+    vout0 = vmlaq_f32(vout0, vin0, vscale);
+    vout1 = vmlaq_f32(vout1, vin1, vscale);
+    vout2 = vmlaq_f32(vout2, vin2, vscale);
+    vout3 = vmlaq_f32(vout3, vin3, vscale);
+
+    vst1q_f32(ADDRESS_OF(aOutput, i), vout0);
+    vst1q_f32(ADDRESS_OF(aOutput, i+4), vout1);
+    vst1q_f32(ADDRESS_OF(aOutput, i+8), vout2);
+    vst1q_f32(ADDRESS_OF(aOutput, i+12), vout3);
+  }
+
+  for (unsigned j = 0; j < dif; ++i, ++j) {
+    aOutput[i] += aInput[i]*aScale;
+  }
+}
+void
+AudioBlockCopyChannelWithScale_NEON(const float* aInput,
+                                    float aScale,
+                                    float* aOutput)
+{
+  ASSERT_ALIGNED(aInput);
+  ASSERT_ALIGNED(aOutput);
+
+  float32x4_t vin0, vin1, vin2, vin3;
+  float32x4_t vout0, vout1, vout2, vout3;
+  float32x4_t vscale = vmovq_n_f32(aScale);
+
+  for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; i+=16) {
+    vin0 = vld1q_f32(ADDRESS_OF(aInput, i));
+    vin1 = vld1q_f32(ADDRESS_OF(aInput, i+4));
+    vin2 = vld1q_f32(ADDRESS_OF(aInput, i+8));
+    vin3 = vld1q_f32(ADDRESS_OF(aInput, i+12));
+
+    vout0 = vmulq_f32(vin0, vscale);
+    vout1 = vmulq_f32(vin1, vscale);
+    vout2 = vmulq_f32(vin2, vscale);
+    vout3 = vmulq_f32(vin3, vscale);
+
+    vst1q_f32(ADDRESS_OF(aOutput, i), vout0);
+    vst1q_f32(ADDRESS_OF(aOutput, i+4), vout1);
+    vst1q_f32(ADDRESS_OF(aOutput, i+8), vout2);
+    vst1q_f32(ADDRESS_OF(aOutput, i+12), vout3);
+  }
+}
+
+void
+AudioBlockCopyChannelWithScale_NEON(const float aInput[WEBAUDIO_BLOCK_SIZE],
+                                    const float aScale[WEBAUDIO_BLOCK_SIZE],
+                                    float aOutput[WEBAUDIO_BLOCK_SIZE])
+{
+  ASSERT_ALIGNED(aInput);
+  ASSERT_ALIGNED(aScale);
+  ASSERT_ALIGNED(aOutput);
+
+  float32x4_t vin0, vin1, vin2, vin3;
+  float32x4_t vout0, vout1, vout2, vout3;
+  float32x4_t vscale0, vscale1, vscale2, vscale3;
+
+  for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; i+=16) {
+    vin0 = vld1q_f32(ADDRESS_OF(aInput, i));
+    vin1 = vld1q_f32(ADDRESS_OF(aInput, i+4));
+    vin2 = vld1q_f32(ADDRESS_OF(aInput, i+8));
+    vin3 = vld1q_f32(ADDRESS_OF(aInput, i+12));
+
+    vscale0 = vld1q_f32(ADDRESS_OF(aScale, i));
+    vscale1 = vld1q_f32(ADDRESS_OF(aScale, i+4));
+    vscale2 = vld1q_f32(ADDRESS_OF(aScale, i+8));
+    vscale3 = vld1q_f32(ADDRESS_OF(aScale, i+12));
+
+    vout0 = vmulq_f32(vin0, vscale0);
+    vout1 = vmulq_f32(vin1, vscale1);
+    vout2 = vmulq_f32(vin2, vscale2);
+    vout3 = vmulq_f32(vin3, vscale3);
+
+    vst1q_f32(ADDRESS_OF(aOutput, i), vout0);
+    vst1q_f32(ADDRESS_OF(aOutput, i+4), vout1);
+    vst1q_f32(ADDRESS_OF(aOutput, i+8), vout2);
+    vst1q_f32(ADDRESS_OF(aOutput, i+12), vout3);
+  }
+}
+
+void
+AudioBufferInPlaceScale_NEON(float* aBlock,
+                             float aScale,
+                             uint32_t aSize)
+{
+  ASSERT_ALIGNED(aBlock);
+
+  float32x4_t vin0, vin1, vin2, vin3;
+  float32x4_t vout0, vout1, vout2, vout3;
+  float32x4_t vscale = vmovq_n_f32(aScale);
+
+  uint32_t dif = aSize % 16;
+  uint32_t vectorSize = aSize - dif;
+  uint32_t i = 0;
+  for (; i < vectorSize; i+=16) {
+    vin0 = vld1q_f32(ADDRESS_OF(aBlock, i));
+    vin1 = vld1q_f32(ADDRESS_OF(aBlock, i+4));
+    vin2 = vld1q_f32(ADDRESS_OF(aBlock, i+8));
+    vin3 = vld1q_f32(ADDRESS_OF(aBlock, i+12));
+
+    vout0 = vmulq_f32(vin0, vscale);
+    vout1 = vmulq_f32(vin1, vscale);
+    vout2 = vmulq_f32(vin2, vscale);
+    vout3 = vmulq_f32(vin3, vscale);
+
+    vst1q_f32(ADDRESS_OF(aBlock, i), vout0);
+    vst1q_f32(ADDRESS_OF(aBlock, i+4), vout1);
+    vst1q_f32(ADDRESS_OF(aBlock, i+8), vout2);
+    vst1q_f32(ADDRESS_OF(aBlock, i+12), vout3);
+  }
+
+  for (unsigned j = 0; j < dif; ++i, ++j) {
+    aBlock[i] *= aScale;
+  }
+}
+
+void
+AudioBlockPanStereoToStereo_NEON(const float aInputL[WEBAUDIO_BLOCK_SIZE],
+                                 const float aInputR[WEBAUDIO_BLOCK_SIZE],
+                                 float aGainL, float aGainR, bool aIsOnTheLeft,
+                                 float aOutputL[WEBAUDIO_BLOCK_SIZE],
+                                 float aOutputR[WEBAUDIO_BLOCK_SIZE])
+{
+  ASSERT_ALIGNED(aInputL);
+  ASSERT_ALIGNED(aInputR);
+  ASSERT_ALIGNED(aOutputL);
+  ASSERT_ALIGNED(aOutputR);
+
+  float32x4_t vinL0, vinL1;
+  float32x4_t vinR0, vinR1;
+  float32x4_t voutL0, voutL1;
+  float32x4_t voutR0, voutR1;
+  float32x4_t vscaleL = vmovq_n_f32(aGainL);
+  float32x4_t vscaleR = vmovq_n_f32(aGainR);
+
+  if (aIsOnTheLeft) {
+    for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; i+=8) {
+      vinL0 = vld1q_f32(ADDRESS_OF(aInputL, i));
+      vinL1 = vld1q_f32(ADDRESS_OF(aInputL, i+4));
+
+      vinR0 = vld1q_f32(ADDRESS_OF(aInputR, i));
+      vinR1 = vld1q_f32(ADDRESS_OF(aInputR, i+4));
+
+      voutL0 = vmlaq_f32(vinL0, vinR0, vscaleL);
+      voutL1 = vmlaq_f32(vinL1, vinR1, vscaleL);
+
+      vst1q_f32(ADDRESS_OF(aOutputL, i), voutL0);
+      vst1q_f32(ADDRESS_OF(aOutputL, i+4), voutL1);
+
+      voutR0 = vmulq_f32(vinR0, vscaleR);
+      voutR1 = vmulq_f32(vinR1, vscaleR);
+
+      vst1q_f32(ADDRESS_OF(aOutputR, i), voutR0);
+      vst1q_f32(ADDRESS_OF(aOutputR, i+4), voutR1);
+    }
+  } else {
+    for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; i+=8) {
+      vinL0 = vld1q_f32(ADDRESS_OF(aInputL, i));
+      vinL1 = vld1q_f32(ADDRESS_OF(aInputL, i+4));
+
+      vinR0 = vld1q_f32(ADDRESS_OF(aInputR, i));
+      vinR1 = vld1q_f32(ADDRESS_OF(aInputR, i+4));
+
+      voutL0 = vmulq_f32(vinL0, vscaleL);
+      voutL1 = vmulq_f32(vinL1, vscaleL);
+
+      vst1q_f32(ADDRESS_OF(aOutputL, i), voutL0);
+      vst1q_f32(ADDRESS_OF(aOutputL, i+4), voutL1);
+
+      voutR0 = vmlaq_f32(vinR0, vinL0, vscaleR);
+      voutR1 = vmlaq_f32(vinR1, vinL1, vscaleR);
+
+      vst1q_f32(ADDRESS_OF(aOutputR, i), voutR0);
+      vst1q_f32(ADDRESS_OF(aOutputR, i+4), voutR1);
+    }
+  }
+}
+}