1 files changed, 136 insertions, 0 deletions
diff --git a/third_party/webrtc/src/webrtc/common_audio/signal_processing/include/spl_inl_armv7.h b/third_party/webrtc/src/webrtc/common_audio/signal_processing/include/spl_inl_armv7.h
new file mode 100644
index 00000000..27188011
--- /dev/null
+++ b/third_party/webrtc/src/webrtc/common_audio/signal_processing/include/spl_inl_armv7.h
@@ -0,0 +1,136 @@
+/*
+ *  Copyright (c) 2012 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 header file includes the inline functions for ARM processors in
+ * the fix point signal processing library.
+ */
+
+#ifndef WEBRTC_SPL_SPL_INL_ARMV7_H_
+#define WEBRTC_SPL_SPL_INL_ARMV7_H_
+
+/* TODO(kma): Replace some assembly code with GCC intrinsics
+ * (e.g. __builtin_clz).
+ */
+
+/* This function produces result that is not bit exact with that by the generic
+ * C version in some cases, although the former is at least as accurate as the
+ * later.
+ */
+static __inline int32_t WEBRTC_SPL_MUL_16_32_RSFT16(int16_t a, int32_t b) {
+  int32_t tmp = 0;
+  __asm __volatile ("smulwb %0, %1, %2":"=r"(tmp):"r"(b), "r"(a));
+  return tmp;
+}
+
+static __inline int32_t WEBRTC_SPL_MUL_16_16(int16_t a, int16_t b) {
+  int32_t tmp = 0;
+  __asm __volatile ("smulbb %0, %1, %2":"=r"(tmp):"r"(a), "r"(b));
+  return tmp;
+}
+
+// TODO(kma): add unit test.
+static __inline int32_t WebRtc_MulAccumW16(int16_t a, int16_t b, int32_t c) {
+  int32_t tmp = 0;
+  __asm __volatile ("smlabb %0, %1, %2, %3":"=r"(tmp):"r"(a), "r"(b), "r"(c));
+  return tmp;
+}
+
+static __inline int16_t WebRtcSpl_AddSatW16(int16_t a, int16_t b) {
+  int32_t s_sum = 0;
+
+  __asm __volatile ("qadd16 %0, %1, %2":"=r"(s_sum):"r"(a), "r"(b));
+
+  return (int16_t) s_sum;
+}
+
+static __inline int32_t WebRtcSpl_AddSatW32(int32_t l_var1, int32_t l_var2) {
+  int32_t l_sum = 0;
+
+  __asm __volatile ("qadd %0, %1, %2":"=r"(l_sum):"r"(l_var1), "r"(l_var2));
+
+  return l_sum;
+}
+
+static __inline int32_t WebRtcSpl_SubSatW32(int32_t l_var1, int32_t l_var2) {
+  int32_t l_sub = 0;
+
+  __asm __volatile ("qsub %0, %1, %2":"=r"(l_sub):"r"(l_var1), "r"(l_var2));
+
+  return l_sub;
+}
+
+static __inline int16_t WebRtcSpl_SubSatW16(int16_t var1, int16_t var2) {
+  int32_t s_sub = 0;
+
+  __asm __volatile ("qsub16 %0, %1, %2":"=r"(s_sub):"r"(var1), "r"(var2));
+
+  return (int16_t)s_sub;
+}
+
+static __inline int16_t WebRtcSpl_GetSizeInBits(uint32_t n) {
+  int32_t tmp = 0;
+
+  __asm __volatile ("clz %0, %1":"=r"(tmp):"r"(n));
+
+  return (int16_t)(32 - tmp);
+}
+
+static __inline int16_t WebRtcSpl_NormW32(int32_t a) {
+  int32_t tmp = 0;
+
+  if (a == 0) {
+    return 0;
+  }
+  else if (a < 0) {
+    a ^= 0xFFFFFFFF;
+  }
+
+  __asm __volatile ("clz %0, %1":"=r"(tmp):"r"(a));
+
+  return (int16_t)(tmp - 1);
+}
+
+static __inline int16_t WebRtcSpl_NormU32(uint32_t a) {
+  int tmp = 0;
+
+  if (a == 0) return 0;
+
+  __asm __volatile ("clz %0, %1":"=r"(tmp):"r"(a));
+
+  return (int16_t)tmp;
+}
+
+static __inline int16_t WebRtcSpl_NormW16(int16_t a) {
+  int32_t tmp = 0;
+  int32_t a_32 = a;
+
+  if (a_32 == 0) {
+    return 0;
+  }
+  else if (a_32 < 0) {
+    a_32 ^= 0xFFFFFFFF;
+  }
+
+  __asm __volatile ("clz %0, %1":"=r"(tmp):"r"(a_32));
+
+  return (int16_t)(tmp - 17);
+}
+
+// TODO(kma): add unit test.
+static __inline int16_t WebRtcSpl_SatW32ToW16(int32_t value32) {
+  int32_t out = 0;
+
+  __asm __volatile ("ssat %0, #16, %1" : "=r"(out) : "r"(value32));
+
+  return (int16_t)out;
+}
+
+#endif  // WEBRTC_SPL_SPL_INL_ARMV7_H_