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<h1>arm_dotproduct_example_f32.c</h1> </div>
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<div class="fragment"><pre class="fragment"><span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">* Copyright (C) 2010 ARM Limited. All rights reserved. </span>
<span class="comment">* </span>
<span class="comment">* $Date: 29. November 2010 </span>
<span class="comment">* $Revision: V1.0.3 </span>
<span class="comment">* </span>
<span class="comment">* Project: CMSIS DSP Library </span>
<span class="comment">* Title: arm_dotproduct_example_f32.c </span>
<span class="comment">* </span>
<span class="comment">* Description: Example code computing dot product of two vectors. </span>
<span class="comment">* </span>
<span class="comment">* Target Processor: Cortex-M4/Cortex-M3 </span>
<span class="comment">*</span>
<span class="comment">*</span>
<span class="comment">* Version 1.0.3 2010/11/29 </span>
<span class="comment">* Re-organized the CMSIS folders and updated documentation. </span>
<span class="comment">* </span>
<span class="comment">* Version 1.0.1 2010/10/05 KK </span>
<span class="comment">* Production release and review comments incorporated. </span>
<span class="comment">*</span>
<span class="comment">* Version 1.0.0 2010/09/20 KK</span>
<span class="comment">* Production release and review comments incorporated.</span>
<span class="comment">* ------------------------------------------------------------------- */</span>
<span class="preprocessor">#include &lt;math.h&gt;</span>
<span class="preprocessor">#include &quot;<a class="code" href="arm__math_8h.html">arm_math.h</a>&quot;</span>
<span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">* Defines each of the tests performed </span>
<span class="comment">* ------------------------------------------------------------------- */</span>
<span class="preprocessor">#define MAX_BLOCKSIZE 32 </span>
<span class="preprocessor"></span><span class="preprocessor">#define DELTA (0.000001f) </span>
<span class="preprocessor"></span>
<span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">* Test input data for Floating point Dot Product example for 32-blockSize </span>
<span class="comment">* Generated by the MATLAB randn() function </span>
<span class="comment">* ------------------------------------------------------------------- */</span>
<span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">** Test input data of srcA for blockSize 32 </span>
<span class="comment">** ------------------------------------------------------------------- */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a0"></a><a class="code" href="arm__dotproduct__example__f32_8c.html#a0c248a472fdc0507e4ab7d693e4876b6">srcA_buf_f32</a>[<a name="a1"></a><a class="code" href="arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>] =
{
-0.4325648115282207, -1.6655843782380970, 0.1253323064748307,
0.2876764203585489, -1.1464713506814637, 1.1909154656429988,
1.1891642016521031, -0.0376332765933176, 0.3272923614086541,
0.1746391428209245, -0.1867085776814394, 0.7257905482933027,
-0.5883165430141887, 2.1831858181971011, -0.1363958830865957,
0.1139313135208096, 1.0667682113591888, 0.0592814605236053,
-0.0956484054836690, -0.8323494636500225, 0.2944108163926404,
-1.3361818579378040, 0.7143245518189522, 1.6235620644462707,
-0.6917757017022868, 0.8579966728282626, 1.2540014216025324,
-1.5937295764474768, -1.4409644319010200, 0.5711476236581780,
-0.3998855777153632, 0.6899973754643451
};
<span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">** Test input data of srcB for blockSize 32 </span>
<span class="comment">** ------------------------------------------------------------------- */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a2"></a><a class="code" href="arm__dotproduct__example__f32_8c.html#a67d9082c1585d4854ae9ca38db170ff5">srcB_buf_f32</a>[<a class="code" href="arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>] =
{
1.7491401329284098, 0.1325982188803279, 0.3252281811989881,
-0.7938091410349637, 0.3149236145048914, -0.5272704888029532,
0.9322666565031119, 1.1646643544607362, -2.0456694357357357,
-0.6443728590041911, 1.7410657940825480, 0.4867684246821860,
1.0488288293660140, 1.4885752747099299, 1.2705014969484090,
-1.8561241921210170, 2.1343209047321410, 1.4358467535865909,
-0.9173023332875400, -1.1060770780029008, 0.8105708062681296,
0.6985430696369063, -0.4015827425012831, 1.2687512030669628,
-0.7836083053674872, 0.2132664971465569, 0.7878984786088954,
0.8966819356782295, -0.1869172943544062, 1.0131816724341454,
0.2484350696132857, 0.0596083377937976
};
<span class="comment">/* Reference dot product output */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a3"></a><a class="code" href="arm__dotproduct__example__f32_8c.html#ad57c1f9ad68d098d79b15ec6844a26fc">refDotProdOut</a> = 5.9273644806352142;
<span class="comment">/* ---------------------------------------------------------------------- </span>
<span class="comment">* Declare Global variables </span>
<span class="comment">* ------------------------------------------------------------------- */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a4"></a><a class="code" href="arm__dotproduct__example__f32_8c.html#ad0bfd425dfe1ff2bda80fb957e464098">multOutput</a>[<a class="code" href="arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>]; <span class="comment">/* Intermediate output */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> <a name="a5"></a><a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>; <span class="comment">/* Final ouput */</span>
<a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6" title="Error status returned by some functions in the library.">arm_status</a> <a name="a6"></a><a class="code" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a>; <span class="comment">/* Status of the example */</span>
int32_t <a name="a7"></a><a class="code" href="arm__class__marks__example__f32_8c.html#a196718f834091385d38586a0ce4009dc">main</a>(<span class="keywordtype">void</span>)
{
uint32_t i; <span class="comment">/* Loop counter */</span>
<a class="code" href="arm__math_8h.html#a4611b605e45ab401f02cab15c5e38715" title="32-bit floating-point type definition.">float32_t</a> diff; <span class="comment">/* Difference between reference and test outputs */</span>
<span class="comment">/* Multiplication of two input buffers */</span>
<a name="a8"></a><a class="code" href="group___basic_mult.html#gaca3f0b8227da431ab29225b88888aa32" title="Floating-point vector multiplication.">arm_mult_f32</a>(<a class="code" href="arm__dotproduct__example__f32_8c.html#a0c248a472fdc0507e4ab7d693e4876b6">srcA_buf_f32</a>, <a class="code" href="arm__dotproduct__example__f32_8c.html#a67d9082c1585d4854ae9ca38db170ff5">srcB_buf_f32</a>, <a class="code" href="arm__dotproduct__example__f32_8c.html#ad0bfd425dfe1ff2bda80fb957e464098">multOutput</a>, <a class="code" href="arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>);
<span class="comment">/* Accumulate the multiplication output values to </span>
<span class="comment"> get the dot product of the two inputs */</span>
<span class="keywordflow">for</span>(i=0; i&lt; <a class="code" href="arm__convolution__example__f32_8c.html#af8a1d2ed31f7c9a00fec46a798edb61b">MAX_BLOCKSIZE</a>; i++)
{
<a name="a9"></a><a class="code" href="group___basic_add.html#ga6a904a547413b10565dd1d251c6bafbd" title="Floating-point vector addition.">arm_add_f32</a>(&amp;<a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>, &amp;<a class="code" href="arm__dotproduct__example__f32_8c.html#ad0bfd425dfe1ff2bda80fb957e464098">multOutput</a>[i], &amp;<a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>, 1);
}
<span class="comment">/* absolute value of difference between ref and test */</span>
diff = fabsf(<a class="code" href="arm__dotproduct__example__f32_8c.html#ad57c1f9ad68d098d79b15ec6844a26fc">refDotProdOut</a> - <a class="code" href="arm__class__marks__example__f32_8c.html#afd4d61aad5f35a4e42d580004e2f9a1d">testOutput</a>);
<span class="comment">/* Comparison of dot product value with reference */</span>
<span class="keywordflow">if</span>(diff &gt; <a name="a10"></a><a class="code" href="arm__convolution__example__f32_8c.html#a3fd2b1bcd7ddcf506237987ad780f495">DELTA</a>)
{
<a class="code" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a> = <a name="a11"></a><a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>;
}
<span class="keywordflow">if</span>( <a class="code" href="arm__dotproduct__example__f32_8c.html#a88ccb294236ab22b00310c47164c53c3">status</a> == <a class="code" href="arm__math_8h.html#a5e459c6409dfcd2927bb8a57491d7cf6a09457f2be656b35015fd6d36202fa376">ARM_MATH_TEST_FAILURE</a>)
{
<span class="keywordflow">while</span>(1);
}
}
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