From 9bf37cc9712506b2483650c82d3c41152337ef7e Mon Sep 17 00:00:00 2001
From: Dave Burke <daveburke@google.com>
Date: Tue, 17 Apr 2012 09:51:45 -0700
Subject: Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
---
 libFDK/include/clz.h | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 libFDK/include/clz.h

(limited to 'libFDK/include/clz.h')

diff --git a/libFDK/include/clz.h b/libFDK/include/clz.h
new file mode 100644
index 0000000..42c1c53
--- /dev/null
+++ b/libFDK/include/clz.h
@@ -0,0 +1,127 @@
+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+                        (C) Copyright Fraunhofer IIS (1999)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):   Marc Gayer
+   Description: fixed point intrinsics
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#if !defined(__CLZ_H__)
+#define __CLZ_H__
+
+#include "FDK_archdef.h"
+#include "machine_type.h"
+
+#if defined(__arm__)
+#include "arm/clz_arm.h"
+
+#elif defined(__mips__)	/* cppp replaced: elif */
+#include "mips/clz_mips.h"
+
+#endif /* all cores */
+
+
+/*************************************************************************
+ *************************************************************************
+    Software fallbacks for missing functions.
+**************************************************************************
+**************************************************************************/
+
+#if !defined(FUNCTION_fixnormz_S)
+#ifdef FUNCTION_fixnormz_D
+inline INT fixnormz_S (SHORT a)
+{
+  return fixnormz_D((INT)(a));
+}
+#else
+inline INT fixnormz_S (SHORT a)
+{
+    int leadingBits = 0;
+    a = ~a;
+    while(a & 0x8000) {
+      leadingBits++;
+      a <<= 1;
+    }
+
+    return (leadingBits);
+}
+#endif
+#endif
+
+#if !defined(FUNCTION_fixnormz_D)
+inline INT fixnormz_D (LONG a)
+{
+    INT leadingBits = 0;
+    a = ~a;
+    while(a & 0x80000000) {
+      leadingBits++;
+      a <<= 1;
+    }
+
+    return (leadingBits);
+}
+#endif
+
+
+/*****************************************************************************
+
+    functionname: fixnorm_D
+    description:  Count leading ones or zeros of operand val for dfract/LONG INT values.
+                  Return this value minus 1. Return 0 if operand==0.
+*****************************************************************************/
+#if !defined(FUNCTION_fixnorm_S)
+#ifdef FUNCTION_fixnorm_D
+inline INT fixnorm_S(FIXP_SGL val)
+{
+  return fixnorm_D((INT)(val));
+}
+#else
+inline INT fixnorm_S(FIXP_SGL val)
+{
+    INT leadingBits = 0;
+    if ( val != (FIXP_SGL)0 ) {
+        if ( val < (FIXP_SGL)0 ) {
+            val = ~val;
+        }
+        leadingBits = fixnormz_S(val) - 1;
+    }
+    return (leadingBits);
+}
+#endif
+#endif
+
+#if !defined(FUNCTION_fixnorm_D)
+inline INT fixnorm_D(FIXP_DBL val)
+{
+    INT leadingBits = 0;
+    if ( val != (FIXP_DBL)0 ) {
+        if ( val < (FIXP_DBL)0 ) {
+            val = ~val;
+        }
+        leadingBits = fixnormz_D(val) - 1;
+    }
+    return (leadingBits);
+}
+#endif
+
+#endif /* __CLZ_H__ */
-- 
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