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    113. 

  113. <div class="title">Vector Subtraction<div class="ingroups"><a class="el" href="group__groupMath.html">Basic Math Functions</a></div></div>  </div>
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    117. 

  117. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
    118. 

  118. Functions</h2></td></tr>
    119. 

  119. <tr class="memitem:ga76b8b2aec34269c6de0b090cab00fb33"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicSub.html#ga76b8b2aec34269c6de0b090cab00fb33">arm_sub_f32</a> (const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrcA, const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
    120. 

  120. <tr class="memdesc:ga76b8b2aec34269c6de0b090cab00fb33"><td class="mdescLeft">&#160;</td><td class="mdescRight">Floating-point vector subtraction.  <a href="#ga76b8b2aec34269c6de0b090cab00fb33">More...</a><br/></td></tr>
    121. 

  121. <tr class="separator:ga76b8b2aec34269c6de0b090cab00fb33"><td class="memSeparator" colspan="2">&#160;</td></tr>
    122. 

  122. <tr class="memitem:ga33a096c2860eca18bbc4e6966409064f"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicSub.html#ga33a096c2860eca18bbc4e6966409064f">arm_sub_q15</a> (const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrcA, const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
    123. 

  123. <tr class="memdesc:ga33a096c2860eca18bbc4e6966409064f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q15 vector subtraction.  <a href="#ga33a096c2860eca18bbc4e6966409064f">More...</a><br/></td></tr>
    124. 

  124. <tr class="separator:ga33a096c2860eca18bbc4e6966409064f"><td class="memSeparator" colspan="2">&#160;</td></tr>
    125. 

  125. <tr class="memitem:ga913159f71589b56dbfb03ddc1210a59c"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicSub.html#ga913159f71589b56dbfb03ddc1210a59c">arm_sub_q31</a> (const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrcA, const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
    126. 

  126. <tr class="memdesc:ga913159f71589b56dbfb03ddc1210a59c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q31 vector subtraction.  <a href="#ga913159f71589b56dbfb03ddc1210a59c">More...</a><br/></td></tr>
    127. 

  127. <tr class="separator:ga913159f71589b56dbfb03ddc1210a59c"><td class="memSeparator" colspan="2">&#160;</td></tr>
    128. 

  128. <tr class="memitem:ga162990b82a18231c4e606ba0e6584c7e"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__BasicSub.html#ga162990b82a18231c4e606ba0e6584c7e">arm_sub_q7</a> (const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrcA, const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pSrcB, <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *pDst, uint32_t <a class="el" href="arm__variance__example__f32_8c.html#ab6558f40a619c2502fbc24c880fd4fb0">blockSize</a>)</td></tr>
    129. 

  129. <tr class="memdesc:ga162990b82a18231c4e606ba0e6584c7e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Q7 vector subtraction.  <a href="#ga162990b82a18231c4e606ba0e6584c7e">More...</a><br/></td></tr>
    130. 

  130. <tr class="separator:ga162990b82a18231c4e606ba0e6584c7e"><td class="memSeparator" colspan="2">&#160;</td></tr>
    131. 

  131. </table>
    132. 

  132. <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
    133. 

  133. <p>Element-by-element subtraction of two vectors.</p>
    134. 

  134. <pre>
    135. 

  135.     pDst[n] = pSrcA[n] - pSrcB[n],   0 &lt;= n &lt; blockSize.
    136. 

  136. </pre><p>There are separate functions for floating-point, Q7, Q15, and Q31 data types. </p>
    137. 

  137. <h2 class="groupheader">Function Documentation</h2>
    138. 

  138. <a class="anchor" id="ga76b8b2aec34269c6de0b090cab00fb33"></a>
    139. 

  139. <div class="memitem">
    140. 

  140. <div class="memproto">
    141. 

  141.       <table class="memname">
    142. 

  142.         <tr>
    143. 

  143.           <td class="memname">void arm_sub_f32 </td>
    144. 

  144.           <td>(</td>
    145. 

  145.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td>
    146. 

  146.           <td class="paramname"><em>pSrcA</em>, </td>
    147. 

  147.         </tr>
    148. 

  148.         <tr>
    149. 

  149.           <td class="paramkey"></td>
    150. 

  150.           <td></td>
    151. 

  151.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td>
    152. 

  152.           <td class="paramname"><em>pSrcB</em>, </td>
    153. 

  153.         </tr>
    154. 

  154.         <tr>
    155. 

  155.           <td class="paramkey"></td>
    156. 

  156.           <td></td>
    157. 

  157.           <td class="paramtype"><a class="el" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715">float32_t</a> *&#160;</td>
    158. 

  158.           <td class="paramname"><em>pDst</em>, </td>
    159. 

  159.         </tr>
    160. 

  160.         <tr>
    161. 

  161.           <td class="paramkey"></td>
    162. 

  162.           <td></td>
    163. 

  163.           <td class="paramtype">uint32_t&#160;</td>
    164. 

  164.           <td class="paramname"><em>blockSize</em>&#160;</td>
    165. 

  165.         </tr>
    166. 

  166.         <tr>
    167. 

  167.           <td></td>
    168. 

  168.           <td>)</td>
    169. 

  169.           <td></td><td></td>
    170. 

  170.         </tr>
    171. 

  171.       </table>
    172. 

  172. </div><div class="memdoc">
    173. 

  173. <dl class="params"><dt>Parameters</dt><dd>
    174. 

  174.   <table class="params">
    175. 

  175.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcA</td><td>points to the first input vector </td></tr>
    176. 

  176.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcB</td><td>points to the second input vector </td></tr>
    177. 

  177.     <tr><td class="paramdir">[out]</td><td class="paramname">pDst</td><td>points to the output vector </td></tr>
    178. 

  178.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
    179. 

  179.   </table>
    180. 

  180.   </dd>
    181. 

  181. </dl>
    182. 

  182. <dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
    183. 

  183. 

  184. </div>
    185. 

  185. </div>
    186. 

  186. <a class="anchor" id="ga33a096c2860eca18bbc4e6966409064f"></a>
    187. 

  187. <div class="memitem">
    188. 

  188. <div class="memproto">
    189. 

  189.       <table class="memname">
    190. 

  190.         <tr>
    191. 

  191.           <td class="memname">void arm_sub_q15 </td>
    192. 

  192.           <td>(</td>
    193. 

  193.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    194. 

  194.           <td class="paramname"><em>pSrcA</em>, </td>
    195. 

  195.         </tr>
    196. 

  196.         <tr>
    197. 

  197.           <td class="paramkey"></td>
    198. 

  198.           <td></td>
    199. 

  199.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    200. 

  200.           <td class="paramname"><em>pSrcB</em>, </td>
    201. 

  201.         </tr>
    202. 

  202.         <tr>
    203. 

  203.           <td class="paramkey"></td>
    204. 

  204.           <td></td>
    205. 

  205.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ab5a8fb21a5b3b983d5f54f31614052ea">q15_t</a> *&#160;</td>
    206. 

  206.           <td class="paramname"><em>pDst</em>, </td>
    207. 

  207.         </tr>
    208. 

  208.         <tr>
    209. 

  209.           <td class="paramkey"></td>
    210. 

  210.           <td></td>
    211. 

  211.           <td class="paramtype">uint32_t&#160;</td>
    212. 

  212.           <td class="paramname"><em>blockSize</em>&#160;</td>
    213. 

  213.         </tr>
    214. 

  214.         <tr>
    215. 

  215.           <td></td>
    216. 

  216.           <td>)</td>
    217. 

  217.           <td></td><td></td>
    218. 

  218.         </tr>
    219. 

  219.       </table>
    220. 

  220. </div><div class="memdoc">
    221. 

  221. <dl class="params"><dt>Parameters</dt><dd>
    222. 

  222.   <table class="params">
    223. 

  223.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcA</td><td>points to the first input vector </td></tr>
    224. 

  224.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcB</td><td>points to the second input vector </td></tr>
    225. 

  225.     <tr><td class="paramdir">[out]</td><td class="paramname">pDst</td><td>points to the output vector </td></tr>
    226. 

  226.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
    227. 

  227.   </table>
    228. 

  228.   </dd>
    229. 

  229. </dl>
    230. 

  230. <dl class="section return"><dt>Returns</dt><dd>none</dd></dl>
    231. 

  231. <dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated. </dd></dl>
    232. 

  232. 

  233. </div>
    234. 

  234. </div>
    235. 

  235. <a class="anchor" id="ga913159f71589b56dbfb03ddc1210a59c"></a>
    236. 

  236. <div class="memitem">
    237. 

  237. <div class="memproto">
    238. 

  238.       <table class="memname">
    239. 

  239.         <tr>
    240. 

  240.           <td class="memname">void arm_sub_q31 </td>
    241. 

  241.           <td>(</td>
    242. 

  242.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    243. 

  243.           <td class="paramname"><em>pSrcA</em>, </td>
    244. 

  244.         </tr>
    245. 

  245.         <tr>
    246. 

  246.           <td class="paramkey"></td>
    247. 

  247.           <td></td>
    248. 

  248.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    249. 

  249.           <td class="paramname"><em>pSrcB</em>, </td>
    250. 

  250.         </tr>
    251. 

  251.         <tr>
    252. 

  252.           <td class="paramkey"></td>
    253. 

  253.           <td></td>
    254. 

  254.           <td class="paramtype"><a class="el" href="arm__math_8h.html#adc89a3547f5324b7b3b95adec3806bc0">q31_t</a> *&#160;</td>
    255. 

  255.           <td class="paramname"><em>pDst</em>, </td>
    256. 

  256.         </tr>
    257. 

  257.         <tr>
    258. 

  258.           <td class="paramkey"></td>
    259. 

  259.           <td></td>
    260. 

  260.           <td class="paramtype">uint32_t&#160;</td>
    261. 

  261.           <td class="paramname"><em>blockSize</em>&#160;</td>
    262. 

  262.         </tr>
    263. 

  263.         <tr>
    264. 

  264.           <td></td>
    265. 

  265.           <td>)</td>
    266. 

  266.           <td></td><td></td>
    267. 

  267.         </tr>
    268. 

  268.       </table>
    269. 

  269. </div><div class="memdoc">
    270. 

  270. <dl class="params"><dt>Parameters</dt><dd>
    271. 

  271.   <table class="params">
    272. 

  272.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcA</td><td>points to the first input vector </td></tr>
    273. 

  273.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcB</td><td>points to the second input vector </td></tr>
    274. 

  274.     <tr><td class="paramdir">[out]</td><td class="paramname">pDst</td><td>points to the output vector </td></tr>
    275. 

  275.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
    276. 

  276.   </table>
    277. 

  277.   </dd>
    278. 

  278. </dl>
    279. 

  279. <dl class="section return"><dt>Returns</dt><dd>none</dd></dl>
    280. 

  280. <dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated. </dd></dl>
    281. 

  281. 

  282. </div>
    283. 

  283. </div>
    284. 

  284. <a class="anchor" id="ga162990b82a18231c4e606ba0e6584c7e"></a>
    285. 

  285. <div class="memitem">
    286. 

  286. <div class="memproto">
    287. 

  287.       <table class="memname">
    288. 

  288.         <tr>
    289. 

  289.           <td class="memname">void arm_sub_q7 </td>
    290. 

  290.           <td>(</td>
    291. 

  291.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</td>
    292. 

  292.           <td class="paramname"><em>pSrcA</em>, </td>
    293. 

  293.         </tr>
    294. 

  294.         <tr>
    295. 

  295.           <td class="paramkey"></td>
    296. 

  296.           <td></td>
    297. 

  297.           <td class="paramtype">const <a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</td>
    298. 

  298.           <td class="paramname"><em>pSrcB</em>, </td>
    299. 

  299.         </tr>
    300. 

  300.         <tr>
    301. 

  301.           <td class="paramkey"></td>
    302. 

  302.           <td></td>
    303. 

  303.           <td class="paramtype"><a class="el" href="arm__math_8h.html#ae541b6f232c305361e9b416fc9eed263">q7_t</a> *&#160;</td>
    304. 

  304.           <td class="paramname"><em>pDst</em>, </td>
    305. 

  305.         </tr>
    306. 

  306.         <tr>
    307. 

  307.           <td class="paramkey"></td>
    308. 

  308.           <td></td>
    309. 

  309.           <td class="paramtype">uint32_t&#160;</td>
    310. 

  310.           <td class="paramname"><em>blockSize</em>&#160;</td>
    311. 

  311.         </tr>
    312. 

  312.         <tr>
    313. 

  313.           <td></td>
    314. 

  314.           <td>)</td>
    315. 

  315.           <td></td><td></td>
    316. 

  316.         </tr>
    317. 

  317.       </table>
    318. 

  318. </div><div class="memdoc">
    319. 

  319. <dl class="params"><dt>Parameters</dt><dd>
    320. 

  320.   <table class="params">
    321. 

  321.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcA</td><td>points to the first input vector </td></tr>
    322. 

  322.     <tr><td class="paramdir">[in]</td><td class="paramname">pSrcB</td><td>points to the second input vector </td></tr>
    323. 

  323.     <tr><td class="paramdir">[out]</td><td class="paramname">pDst</td><td>points to the output vector </td></tr>
    324. 

  324.     <tr><td class="paramdir">[in]</td><td class="paramname">blockSize</td><td>number of samples in each vector </td></tr>
    325. 

  325.   </table>
    326. 

  326.   </dd>
    327. 

  327. </dl>
    328. 

  328. <dl class="section return"><dt>Returns</dt><dd>none</dd></dl>
    329. 

  329. <dl class="section user"><dt>Scaling and Overflow Behavior</dt><dd>The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] will be saturated. </dd></dl>
    330. 

  330. 

  331. </div>
    332. 

  332. </div>
    333. 

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    334. 

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