Fix UBSan errors (left shift of negative value)

webrtc/common_audio/signal_processing/include/signal_processing_library.h

 /*
  *  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.
  */
 
@@ skipping 39 matching lines @@
 #ifndef MIPS32_LE
 // For MIPS platforms, these are inline functions in spl_inl_mips.h
 #define WEBRTC_SPL_MUL_16_16(a, b) \
     ((int32_t) (((int16_t)(a)) * ((int16_t)(b))))
 #define WEBRTC_SPL_MUL_16_32_RSFT16(a, b) \
     (WEBRTC_SPL_MUL_16_16(a, b >> 16) \
      + ((WEBRTC_SPL_MUL_16_16(a, (b & 0xffff) >> 1) + 0x4000) >> 15))
 #endif
 #endif
 
-#define WEBRTC_SPL_MUL_16_32_RSFT11(a, b) \
-    ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 5) \
-    + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x0200) >> 10))
-#define WEBRTC_SPL_MUL_16_32_RSFT14(a, b) \
-    ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 2) \
-    + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x1000) >> 13))
+#define WEBRTC_SPL_MUL_16_32_RSFT11(a, b)          \
+  (WEBRTC_SPL_MUL_16_16(a, (b) >> 16) * (1 << 5) + \
+   (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x0200) >> 10))
+#define WEBRTC_SPL_MUL_16_32_RSFT14(a, b)          \
+  (WEBRTC_SPL_MUL_16_16(a, (b) >> 16) * (1 << 2) + \
+   (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x1000) >> 13))
 #define WEBRTC_SPL_MUL_16_32_RSFT15(a, b) \
     ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 1) \
     + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x2000) >> 14))
 
 #define WEBRTC_SPL_MUL_16_16_RSFT(a, b, c) \
     (WEBRTC_SPL_MUL_16_16(a, b) >> (c))
 
 #define WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(a, b, c) \
     ((WEBRTC_SPL_MUL_16_16(a, b) + ((int32_t) \
                                   (((int32_t)1) << ((c) - 1)))) >> (c))
 
 // C + the 32 most significant bits of A * B
 #define WEBRTC_SPL_SCALEDIFF32(A, B, C) \
     (C + (B >> 16) * A + (((uint32_t)(0x0000FFFF & B) * A) >> 16))
 
 #define WEBRTC_SPL_SAT(a, b, c)         (b > a ? a : b < c ? c : b)
 
 // Shifting with negative numbers allowed
 // Positive means left shift
-#define WEBRTC_SPL_SHIFT_W32(x, c) \
-    (((c) >= 0) ? ((x) << (c)) : ((x) >> (-(c))))
+#define WEBRTC_SPL_SHIFT_W32(x, c) ((c) >= 0 ? (x) * (1 << (c)) : (x) >> -(c))
 
 // Shifting with negative numbers not allowed
 // We cannot do casting here due to signed/unsigned problem
 #define WEBRTC_SPL_LSHIFT_W32(x, c)     ((x) << (c))
 
 #define WEBRTC_SPL_RSHIFT_U32(x, c)     ((uint32_t)(x) >> (c))
 
 #define WEBRTC_SPL_RAND(a) \
     ((int16_t)((((int16_t)a * 18816) >> 7) & 0x00007fff))
 
@@ skipping 1539 matching lines @@
 // This function multiply a 16-bit word by a 16-bit word, and accumulate this
 // value to a 32-bit integer.
 //
 // Input:
 //      - a    : The value of the first 16-bit word.
 //      - b    : The value of the second 16-bit word.
 //      - c    : The value of an 32-bit integer.
 //
 // Return Value: The value of a * b + c.
 //