assembly_8h_source.html
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All Rights Reserved. </span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * </span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * The contents of this file, and the files included with this file, are </span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * subject to the current version of the RealNetworks Public Source License </span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * Version 1.0 (the "RPSL") available at </span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.helixcommunity.org/content/rpsl unless you have licensed </span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * the file under the RealNetworks Community Source License Version 1.0 </span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, </span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * in which case the RCSL will apply. You may also obtain the license terms </span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * directly from RealNetworks. You may not use this file except in </span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * compliance with the RPSL or, if you have a valid RCSL with RealNetworks </span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * applicable to this file, the RCSL. Please see the applicable RPSL or </span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * RCSL for the rights, obligations and limitations governing use of the </span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * contents of the file. </span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * </span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * This file is part of the Helix DNA Technology. RealNetworks is the </span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * developer of the Original Code and owns the copyrights in the portions </span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * it created. </span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * </span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * This file, and the files included with this file, is distributed and made </span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER </span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, </span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. </span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * </span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * Technology Compatibility Kit Test Suite(s) Location: </span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * http://www.helixcommunity.org/content/tck </span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * </span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * Contributor(s): </span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * </span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * ***** END LICENSE BLOCK ***** */</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">/**************************************************************************************</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * Fixed-point MP3 decoder</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * June 2003</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> *</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * assembly.h - assembly language functions and prototypes for supported platforms</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> *</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * - inline rountines with access to 64-bit multiply results </span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * - x86 (_WIN32) and ARM (ARM_ADS, _WIN32_WCE) versions included</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * - some inline functions are mix of asm and C for speed</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * - some functions are in native asm files, so only the prototype is given here</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> *</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * MULSHIFT32(x, y) signed multiply of two 32-bit integers (x and y), returns top 32 bits of 64-bit result</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * FASTABS(x) branchless absolute value of signed integer x</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * CLZ(x) count leading zeros in x</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * MADD64(sum, x, y) (Windows only) sum [64-bit] += x [32-bit] * y [32-bit]</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * SHL64(sum, x, y) (Windows only) 64-bit left shift using __int64</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * SAR64(sum, x, y) (Windows only) 64-bit right shift using __int64</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> */</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#ifndef _ASSEMBLY_H</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define _ASSEMBLY_H</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#if (defined _WIN32 && !defined _WIN32_WCE) || (defined __WINS__ && defined _SYMBIAN) || defined(_OPENWAVE_SIMULATOR) || defined(WINCE_EMULATOR) </span><span class="comment">/* Symbian emulator for Ix86 */</span><span class="preprocessor"></span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#pragma warning( disable : 4035 ) </span><span class="comment">/* complains about inline asm not returning a value */</span><span class="preprocessor"></span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y) </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  __asm {</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  mov eax, x</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  imul y</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  mov eax, edx</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x) </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> {</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordtype">int</span> sign;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  sign = x >> (<span class="keyword">sizeof</span>(int) * 8 - 1);</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  x ^= sign;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  x -= sign;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> x;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> {</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordtype">int</span> numZeros;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span> (!x)</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> (<span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 8);</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  numZeros = 0;</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">while</span> (!(x & 0x80000000)) {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  numZeros++;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  x <<= 1;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  } </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> numZeros;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> }</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">/* MADD64, SHL64, SAR64:</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * write in assembly to avoid dependency on run-time lib for 64-bit shifts, muls</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * (sometimes compiler thunks to function calls instead of code generating)</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * required for Symbian emulator</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> */</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#ifdef __CW32__</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">typedef</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> Word64;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">typedef</span> __int64 Word64;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">static</span> __inline Word64 MADD64(Word64 sum, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sumLo = ((<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *)&sum)[0];</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">int</span> sumHi = ((<span class="keywordtype">int</span> *)&sum)[1];</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  __asm {</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  mov eax, x</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  imul y</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  add eax, sumLo</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  adc edx, sumHi</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">/* equivalent to return (sum + ((__int64)x * y)); */</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> }</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="keyword">static</span> __inline Word64 SHL64(Word64 x, <span class="keywordtype">int</span> n)</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> {</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> xLo = ((<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *)&x)[0];</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">int</span> xHi = ((<span class="keywordtype">int</span> *)&x)[1];</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> nb = (<span class="keywordtype">unsigned</span> char)n;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> (n < 32) {</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  __asm {</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  mov edx, xHi</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  mov eax, xLo</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  mov cl, nb</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  shld edx, eax, cl</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  shl eax, cl</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (n < 64) {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">/* shl masks cl to 0x1f */</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  __asm {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  mov edx, xLo</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  mov cl, nb</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  xor eax, eax</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  shl edx, cl</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  __asm {</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  xor edx, edx</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  xor eax, eax</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="keyword">static</span> __inline Word64 SAR64(Word64 x, <span class="keywordtype">int</span> n)</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> xLo = ((<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *)&x)[0];</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">int</span> xHi = ((<span class="keywordtype">int</span> *)&x)[1];</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> nb = (<span class="keywordtype">unsigned</span> char)n;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">if</span> (n < 32) {</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  __asm {</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  mov edx, xHi</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  mov eax, xLo</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  mov cl, nb</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  shrd eax, edx, cl</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  sar edx, cl</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  }</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (n < 64) {</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">/* sar masks cl to 0x1f */</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  __asm {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  mov edx, xHi</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  mov eax, xHi</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  mov cl, nb</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  sar edx, 31</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  sar eax, cl</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  __asm {</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  sar xHi, 31</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  mov eax, xHi</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  mov edx, xHi</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> }</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="preprocessor">#elif (defined _WIN32) && (defined _WIN32_WCE)</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment">/* use asm function for now (EVC++ 3.0 does horrible job compiling __int64 version) */</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="preprocessor">#define MULSHIFT32 xmp3_MULSHIFT32</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y);</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x) </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> {</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordtype">int</span> sign;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  sign = x >> (<span class="keyword">sizeof</span>(int) * 8 - 1);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  x ^= sign;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  x -= sign;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">return</span> x;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> }</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> {</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordtype">int</span> numZeros;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">if</span> (!x)</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> (<span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 8);</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  numZeros = 0;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">while</span> (!(x & 0x80000000)) {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  numZeros++;</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  x <<= 1;</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  } </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">return</span> numZeros;</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> }</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="preprocessor">#elif defined ARM_ADS</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> {</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">/* important rules for smull RdLo, RdHi, Rm, Rs:</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * RdHi and Rm can't be the same register</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * RdLo and Rm can't be the same register</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * RdHi and RdLo can't be the same register</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * Note: Rs determines early termination (leading sign bits) so if you want to specify</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * which operand is Rs, put it in the SECOND argument (y)</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * For inline assembly, x and y are not assumed to be R0, R1 so it shouldn't matter</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * which one is returned. (If this were a function call, returning y (R1) would </span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * require an extra "mov r0, r1")</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> */</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">int</span> zlow;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  __asm {</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  smull zlow,y,x,y</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  }</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">return</span> y;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> }</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x) </div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> {</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordtype">int</span> t=0; <span class="comment">/*Really is not necessary to initialiaze only to avoid warning*/</span></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  __asm {</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  eor t, x, x, asr #31</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  sub t, t, x, asr #31</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">return</span> t;</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> }</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> {</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordtype">int</span> numZeros;</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">if</span> (!x)</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">return</span> (<span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 8);</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  numZeros = 0;</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">while</span> (!(x & 0x80000000)) {</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  numZeros++;</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  x <<= 1;</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  } </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">return</span> numZeros;</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> }</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="preprocessor">#elif defined(__GNUC__) && defined(ARM)</span></div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> {</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="comment">/* important rules for smull RdLo, RdHi, Rm, Rs:</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment"> * RdHi and Rm can't be the same register</span></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment"> * RdLo and Rm can't be the same register</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> * RdHi and RdLo can't be the same register</span></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment"> * Note: Rs determines early termination (leading sign bits) so if you want to specify</span></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment"> * which operand is Rs, put it in the SECOND argument (y)</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment"> * For inline assembly, x and y are not assumed to be R0, R1 so it shouldn't matter</span></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> * which one is returned. (If this were a function call, returning y (R1) would</span></div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment"> * require an extra "mov r0, r1")</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"> */</span></div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordtype">int</span> zlow;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  __asm__ <span class="keyword">volatile</span> (<span class="stringliteral">"smull %0,%1,%2,%3"</span> : <span class="stringliteral">"=&r"</span> (zlow), <span class="stringliteral">"=r"</span> (y) : <span class="stringliteral">"r"</span> (x), <span class="stringliteral">"1"</span> (y)) ;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> </div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span> y;</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> }</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> {</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordtype">int</span> t=0; <span class="comment">/*Really is not necessary to initialiaze only to avoid warning*/</span></div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  __asm__ <span class="keyword">volatile</span> (</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="stringliteral">"eor %0,%2,%2, asr #31;"</span></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="stringliteral">"sub %0,%1,%2, asr #31;"</span></div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  : <span class="stringliteral">"=&r"</span> (t)</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  : <span class="stringliteral">"0"</span> (t), <span class="stringliteral">"r"</span> (x)</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  );</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">return</span> t;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> }</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> {</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordtype">int</span> numZeros;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">if</span> (!x)</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">return</span> (<span class="keyword">sizeof</span>(<span class="keywordtype">int</span>) * 8);</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  numZeros = 0;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">while</span> (!(x & 0x80000000)) {</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  numZeros++;</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  x <<= 1;</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  }</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span> numZeros;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> }</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="preprocessor">#elif defined(__GNUC__) && defined(__AVR32_UC__)</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> </div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="keyword">typedef</span> <span class="keywordtype">signed</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> Word64; <span class="comment">// 64-bit signed integer.</span></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span> {</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordtype">signed</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> s64Tmp;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  __asm__ __volatile__( <span class="stringliteral">"muls.d %0, %1, %2"</span></div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  : <span class="stringliteral">"=r"</span> (s64Tmp)</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  : <span class="stringliteral">"r"</span> (x), <span class="stringliteral">"r"</span> (y) );</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">return</span>( s64Tmp >> 32 );</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> }</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span> {</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordtype">int</span> tmp;</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  __asm__ __volatile__( <span class="stringliteral">"abs %0"</span></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  : <span class="stringliteral">"=r"</span> (tmp)</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  : <span class="stringliteral">"r"</span> (x) );</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">return</span> tmp; </div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> {</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordtype">int</span> tmp;</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  __asm__ __volatile__( <span class="stringliteral">"clz %0,%1"</span></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  : <span class="stringliteral">"=r"</span> (tmp)</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  : <span class="stringliteral">"r"</span> (x) );</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">return</span> tmp;</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> }</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">/* MADD64, SAR64:</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment"> * write in assembly to avoid dependency on run-time lib for 64-bit shifts, muls</span></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"> * (sometimes compiler do function calls instead of code generating)</span></div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> */</span></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline Word64 MADD64(Word64 sum, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> {</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  __asm__ __volatile__( <span class="stringliteral">"macs.d %0, %1, %2"</span></div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  : <span class="stringliteral">"+r"</span> (sum)</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  : <span class="stringliteral">"r"</span> (x), <span class="stringliteral">"r"</span> (y) );</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">return</span>( sum );</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline Word64 SAR64(Word64 x, <span class="keywordtype">int</span> n)</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span> {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> xLo = (<span class="keywordtype">unsigned</span> int) x;</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordtype">int</span> xHi = (int) (x >> 32);</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordtype">int</span> nComp = 32-n;</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordtype">int</span> tmp;</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="comment">// Shortcut: n is always < 32. </span></div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  __asm__ __volatile__( <span class="stringliteral">"lsl %2, %0, %3\n\t"</span> <span class="comment">// tmp <- xHi<<(32-n)</span></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="stringliteral">"asr %0, %0, %4\n\t"</span> <span class="comment">// xHi <- xHi>>n</span></div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="stringliteral">"lsr %1, %1, %4\n\t"</span> <span class="comment">// xLo <- xLo>>n</span></div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="stringliteral">"or %1, %2\n\t"</span> <span class="comment">// xLo <= xLo || tmp</span></div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  : <span class="stringliteral">"+&r"</span> (xHi), <span class="stringliteral">"+r"</span> (xLo), <span class="stringliteral">"=&r"</span> (tmp)</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  : <span class="stringliteral">"r"</span> (nComp), <span class="stringliteral">"r"</span> (n) );</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  x = xLo | ((Word64)xHi << 32);</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">return</span>( x );</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> }</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> </div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="preprocessor">#elif defined(__CORTEX_M) && __CORTEX_M == 0x04U</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="comment">/* ARM cortex m4 */</span></div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="keyword">typedef</span> <span class="keywordtype">signed</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> Word64; <span class="comment">// 64-bit signed integer.</span></div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> </div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> </div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> MULSHIFT32(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> {</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="comment">/* important rules for smull RdLo, RdHi, Rm, Rs:</span></div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment"> * RdHi and Rm can't be the same register</span></div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment"> * RdLo and Rm can't be the same register</span></div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment"> * RdHi and RdLo can't be the same register</span></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"> * Note: Rs determines early termination (leading sign bits) so if you want to specify</span></div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment"> * which operand is Rs, put it in the SECOND argument (y)</span></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment"> * For inline assembly, x and y are not assumed to be R0, R1 so it shouldn't matter</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment"> * which one is returned. (If this were a function call, returning y (R1) would</span></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment"> * require an extra "mov r0, r1")</span></div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment"> */</span></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordtype">int</span> zlow;</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  __asm__ <span class="keyword">volatile</span> (<span class="stringliteral">"smull %0,%1,%2,%3"</span> : <span class="stringliteral">"=&r"</span> (zlow), <span class="stringliteral">"=r"</span> (y) : <span class="stringliteral">"r"</span> (x), <span class="stringliteral">"1"</span> (y)) ;</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keywordflow">return</span> y;</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> }</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> </div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> FASTABS(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> {</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordtype">int</span> sign;</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> </div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  sign = x >> (<span class="keyword">sizeof</span>(int) * 8 - 1);</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  x ^= sign;</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  x -= sign;</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> </div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">return</span> x;</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span> }</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="keyword">static</span> __inline <span class="keywordtype">int</span> CLZ(<span class="keywordtype">int</span> x)</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> {</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">return</span> __CLZ(x);</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span> }</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="keyword">typedef</span> <span class="keyword">union </span>_U64 {</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  Word64 w64;</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keyword">struct </span>{</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="comment">/* ARM ADS = little endian */</span></div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> lo32;</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordtype">signed</span> <span class="keywordtype">int</span> hi32;</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  } r;</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span> } U64;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="keyword">static</span> __inline Word64 MADD64(Word64 sum64, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> {</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  U64 u;</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  u.w64 = sum64;</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  </div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  __asm__ <span class="keyword">volatile</span> (<span class="stringliteral">"smlal %0,%1,%2,%3"</span> : <span class="stringliteral">"+&r"</span> (u.r.lo32), <span class="stringliteral">"+&r"</span> (u.r.hi32) : <span class="stringliteral">"r"</span> (x), <span class="stringliteral">"r"</span> (y) : <span class="stringliteral">"cc"</span>);</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  </div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">return</span> u.w64;</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span> }</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span> </div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> __attribute__((__always_inline__)) <span class="keyword">static</span> __inline Word64 SAR64(Word64 x, <span class="keywordtype">int</span> n)</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> {</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> xLo = (<span class="keywordtype">unsigned</span> int) x;</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keywordtype">int</span> xHi = (int) (x >> 32);</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordtype">int</span> nComp = 32-n;</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordtype">int</span> tmp;</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="comment">// Shortcut: n is always < 32. </span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  __asm__ __volatile__( <span class="stringliteral">"lsl %2, %0, %3\n\t"</span> <span class="comment">// tmp <- xHi<<(32-n)</span></div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="stringliteral">"asr %0, %0, %4\n\t"</span> <span class="comment">// xHi <- xHi>>n</span></div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="stringliteral">"lsr %1, %1, %4\n\t"</span> <span class="comment">// xLo <- xLo>>n</span></div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="stringliteral">"orr %1, %2\n\t"</span> <span class="comment">// xLo <= xLo || tmp</span></div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  : <span class="stringliteral">"+&r"</span> (xHi), <span class="stringliteral">"+r"</span> (xLo), <span class="stringliteral">"=&r"</span> (tmp)</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  : <span class="stringliteral">"r"</span> (nComp), <span class="stringliteral">"r"</span> (n) );</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  x = xLo | ((Word64)xHi << 32);</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">return</span>( x );</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span> }</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment">//END cortex m4</span></div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span> </div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span> </div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span> </div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="preprocessor">#error Unsupported platform in assembly.h</span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> </div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="preprocessor">#endif </span><span class="comment">/* platforms */</span><span class="preprocessor"></span></div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span> </div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="preprocessor">#endif </span><span class="comment">/* _ASSEMBLY_H */</span><span class="preprocessor"></span></div></div><!-- fragment --></div><!-- contents --> 73 <!-- start footer part --> 74 <hr class="footer"/><address class="footer"><small> 75 Generated by  <a href="http://www.doxygen.org/index.html"> 76 <img class="footer" src="doxygen.png" alt="doxygen"/> 77 </a> 1.8.14 78 </small></address> 79 </body> 80 </html>