assembly.h

00001 /* ***** BEGIN LICENSE BLOCK ***** 
00002  * Version: RCSL 1.0/RPSL 1.0 
00003  *  
00004  * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
00005  *      
00006  * The contents of this file, and the files included with this file, are 
00007  * subject to the current version of the RealNetworks Public Source License 
00008  * Version 1.0 (the "RPSL") available at 
00009  * http://www.helixcommunity.org/content/rpsl unless you have licensed 
00010  * the file under the RealNetworks Community Source License Version 1.0 
00011  * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
00012  * in which case the RCSL will apply. You may also obtain the license terms 
00013  * directly from RealNetworks.  You may not use this file except in 
00014  * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
00015  * applicable to this file, the RCSL.  Please see the applicable RPSL or 
00016  * RCSL for the rights, obligations and limitations governing use of the 
00017  * contents of the file.  
00018  *  
00019  * This file is part of the Helix DNA Technology. RealNetworks is the 
00020  * developer of the Original Code and owns the copyrights in the portions 
00021  * it created. 
00022  *  
00023  * This file, and the files included with this file, is distributed and made 
00024  * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
00025  * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
00026  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
00027  * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
00028  * 
00029  * Technology Compatibility Kit Test Suite(s) Location: 
00030  *    http://www.helixcommunity.org/content/tck 
00031  * 
00032  * Contributor(s): 
00033  *  
00034  * ***** END LICENSE BLOCK ***** */ 
00035 
00036 /**************************************************************************************
00037  * Fixed-point MP3 decoder
00038  * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
00039  * June 2003
00040  *
00041  * assembly.h - assembly language functions and prototypes for supported platforms
00042  *
00043  * - inline rountines with access to 64-bit multiply results 
00044  * - x86 (_WIN32) and ARM (ARM_ADS, _WIN32_WCE) versions included
00045  * - some inline functions are mix of asm and C for speed
00046  * - some functions are in native asm files, so only the prototype is given here
00047  *
00048  * MULSHIFT32(x, y)    signed multiply of two 32-bit integers (x and y), returns top 32 bits of 64-bit result
00049  * FASTABS(x)          branchless absolute value of signed integer x
00050  * CLZ(x)              count leading zeros in x
00051  * MADD64(sum, x, y)   (Windows only) sum [64-bit] += x [32-bit] * y [32-bit]
00052  * SHL64(sum, x, y)    (Windows only) 64-bit left shift using __int64
00053  * SAR64(sum, x, y)    (Windows only) 64-bit right shift using __int64
00054  */
00055 
00056 #ifndef _ASSEMBLY_H
00057 #define _ASSEMBLY_H
00058 
00059 #include <stdint.h> 
00060 
00061 #define RDA5991H
00062 
00063 #if defined(RDA5991H)
00064 
00065 #if defined(__ICCARM__)
00066 #define __inline __INLINE
00067 #endif
00068 
00069 #if 1
00070 static __inline int FASTABS(int x)
00071 {
00072   return((x > 0) ? x : -(x));
00073 }
00074 #endif
00075 
00076 #if 0
00077 static __inline int CLZ(int x)
00078 {
00079   return __CLZ(x);
00080 }
00081 #endif
00082 
00083 #if 0
00084 static __inline int CLZ(int x)
00085 {
00086     int numZeros;
00087 
00088     if (!x)
00089         return (sizeof(int) * 8);
00090 
00091     numZeros = 0;
00092     while (!(x & 0x80000000)) {
00093         numZeros++;
00094         x <<= 1;
00095     } 
00096 
00097     return numZeros;
00098 }
00099 #endif
00100 
00101 #if 1
00102 static __inline int CLZ(int x)
00103 {
00104     int numZeros;
00105         
00106     if (!x)
00107         return (sizeof(int) * 8);
00108     
00109     __asm{
00110         CLZ numZeros, x
00111     }
00112 
00113     return numZeros;
00114 }
00115 #endif
00116 
00117 #if 1
00118 static __inline int64_t SAR64(int64_t x, int n)
00119 {
00120   return (x >> n);
00121 }
00122 #endif
00123 
00124 #if 1
00125 static __inline int MULSHIFT32(int x, int y)
00126 {
00127   int64_t tmp;
00128 
00129   tmp = ((int64_t)x * (int64_t)y);
00130   return (tmp>>32);
00131 }
00132 #endif
00133 
00134 #if 0
00135 static int __inline MULSHIFT32(int x, int y)
00136 {
00137     int tmp;
00138     
00139     __asm{
00140         SMULL tmp, y, x, y
00141     }
00142 
00143     return y;
00144 }
00145 #endif
00146 
00147 #if 1
00148 static __inline int64_t MADD64(int64_t sum64, int x, int y)
00149 {
00150   return (sum64 + (int64_t)x * (int64_t)y);
00151 }
00152 #endif
00153 
00154 #if 0
00155 static __inline int64_t MADD64(int64_t sum64, int x, int y)
00156 {
00157     unsigned int sum64Lo = ((unsigned int *)&sum64)[0];
00158     int sum64Hi = ((int *)&sum64)[1];
00159     
00160     __asm{
00161         SMLAL sum64Lo, sum64Hi, x, y
00162     }
00163 
00164     sum64 = (((int64_t) sum64Hi) << 32) | sum64Lo;
00165     
00166     return sum64;
00167 }
00168 #endif
00169 
00170 #else
00171 #error No assembly defined. See valid options in assembly.h
00172 #endif /** RDA5991H */
00173 
00174 #endif /* _ASSEMBLY_H */