visus
/
toolchain-gcc-arm-embedded
Watch 1
Star 0
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2 Commits
1 Branch
Tree: 898a39b5ab
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '898a39b5ab'
${ noResults }
toolchain-gcc-arm-embedded/share/doc/gcc-arm-none-eabi/html/gccint/Vector-Operations.html

142 lines
6.5KB
Raw Blame History 

  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  2. <html>

  3. <!-- Copyright (C) 1988-2020 Free Software Foundation, Inc.

  4. 

  5. Permission is granted to copy, distribute and/or modify this document

  6. under the terms of the GNU Free Documentation License, Version 1.3 or

  7. any later version published by the Free Software Foundation; with the

  8. Invariant Sections being "Funding Free Software", the Front-Cover

  9. Texts being (a) (see below), and with the Back-Cover Texts being (b)

  10. (see below).  A copy of the license is included in the section entitled

  11. "GNU Free Documentation License".

  12. 

  13. (a) The FSF's Front-Cover Text is:

  14. 

  15. A GNU Manual

  16. 

  17. (b) The FSF's Back-Cover Text is:

  18. 

  19. You have freedom to copy and modify this GNU Manual, like GNU

  20.      software.  Copies published by the Free Software Foundation raise

  21.      funds for GNU development. -->

  22. <!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->

  23. <head>

  24. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

  25. <title>Vector Operations (GNU Compiler Collection (GCC) Internals)</title>

  26. 

  27. <meta name="description" content="Vector Operations (GNU Compiler Collection (GCC) Internals)">

  28. <meta name="keywords" content="Vector Operations (GNU Compiler Collection (GCC) Internals)">

  29. <meta name="resource-type" content="document">

  30. <meta name="distribution" content="global">

  31. <meta name="Generator" content="makeinfo">

  32. <link href="index.html#Top" rel="start" title="Top">

  33. <link href="Option-Index.html#Option-Index" rel="index" title="Option Index">

  34. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">

  35. <link href="RTL.html#RTL" rel="up" title="RTL">

  36. <link href="Conversions.html#Conversions" rel="next" title="Conversions">

  37. <link href="Bit_002dFields.html#Bit_002dFields" rel="prev" title="Bit-Fields">

  38. <style type="text/css">

  39. <!--

  40. a.summary-letter {text-decoration: none}

  41. blockquote.indentedblock {margin-right: 0em}

  42. blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}

  43. blockquote.smallquotation {font-size: smaller}

  44. div.display {margin-left: 3.2em}

  45. div.example {margin-left: 3.2em}

  46. div.lisp {margin-left: 3.2em}

  47. div.smalldisplay {margin-left: 3.2em}

  48. div.smallexample {margin-left: 3.2em}

  49. div.smalllisp {margin-left: 3.2em}

  50. kbd {font-style: oblique}

  51. pre.display {font-family: inherit}

  52. pre.format {font-family: inherit}

  53. pre.menu-comment {font-family: serif}

  54. pre.menu-preformatted {font-family: serif}

  55. pre.smalldisplay {font-family: inherit; font-size: smaller}

  56. pre.smallexample {font-size: smaller}

  57. pre.smallformat {font-family: inherit; font-size: smaller}

  58. pre.smalllisp {font-size: smaller}

  59. span.nolinebreak {white-space: nowrap}

  60. span.roman {font-family: initial; font-weight: normal}

  61. span.sansserif {font-family: sans-serif; font-weight: normal}

  62. ul.no-bullet {list-style: none}

  63. -->

  64. </style>

  65. 

  66. 

  67. </head>

  68. 

  69. <body lang="en">

  70. <a name="Vector-Operations"></a>

  71. <div class="header">

  72. <p>

  73. Next: <a href="Conversions.html#Conversions" accesskey="n" rel="next">Conversions</a>, Previous: <a href="Bit_002dFields.html#Bit_002dFields" accesskey="p" rel="prev">Bit-Fields</a>, Up: <a href="RTL.html#RTL" accesskey="u" rel="up">RTL</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>

  74. </div>

  75. <hr>

  76. <a name="Vector-Operations-1"></a>

  77. <h3 class="section">14.12 Vector Operations</h3>

  78. <a name="index-vector-operations"></a>

  79. 

  80. <p>All normal RTL expressions can be used with vector modes; they are

  81. interpreted as operating on each part of the vector independently.

  82. Additionally, there are a few new expressions to describe specific vector

  83. operations.

  84. </p>

  85. <dl compact="compact">

  86. <dd><a name="index-vec_005fmerge"></a>

  87. </dd>

  88. <dt><code>(vec_merge:<var>m</var> <var>vec1</var> <var>vec2</var> <var>items</var>)</code></dt>

  89. <dd><p>This describes a merge operation between two vectors.  The result is a vector

  90. of mode <var>m</var>; its elements are selected from either <var>vec1</var> or

  91. <var>vec2</var>.  Which elements are selected is described by <var>items</var>, which

  92. is a bit mask represented by a <code>const_int</code>; a zero bit indicates the

  93. corresponding element in the result vector is taken from <var>vec2</var> while

  94. a set bit indicates it is taken from <var>vec1</var>.

  95. </p>

  96. <a name="index-vec_005fselect"></a>

  97. </dd>

  98. <dt><code>(vec_select:<var>m</var> <var>vec1</var> <var>selection</var>)</code></dt>

  99. <dd><p>This describes an operation that selects parts of a vector.  <var>vec1</var> is

  100. the source vector, and <var>selection</var> is a <code>parallel</code> that contains a

  101. <code>const_int</code> (or another expression, if the selection can be made at

  102. runtime) for each of the subparts of the result vector, giving the number of

  103. the source subpart that should be stored into it.  The result mode <var>m</var> is

  104. either the submode for a single element of <var>vec1</var> (if only one subpart is

  105. selected), or another vector mode with that element submode (if multiple

  106. subparts are selected).

  107. </p>

  108. <a name="index-vec_005fconcat"></a>

  109. </dd>

  110. <dt><code>(vec_concat:<var>m</var> <var>x1</var> <var>x2</var>)</code></dt>

  111. <dd><p>Describes a vector concat operation.  The result is a concatenation of the

  112. vectors or scalars <var>x1</var> and <var>x2</var>; its length is the sum of the

  113. lengths of the two inputs.

  114. </p>

  115. <a name="index-vec_005fduplicate"></a>

  116. </dd>

  117. <dt><code>(vec_duplicate:<var>m</var> <var>x</var>)</code></dt>

  118. <dd><p>This operation converts a scalar into a vector or a small vector into a

  119. larger one by duplicating the input values.  The output vector mode must have

  120. the same submodes as the input vector mode or the scalar modes, and the

  121. number of output parts must be an integer multiple of the number of input

  122. parts.

  123. </p>

  124. <a name="index-vec_005fseries"></a>

  125. </dd>

  126. <dt><code>(vec_series:<var>m</var> <var>base</var> <var>step</var>)</code></dt>

  127. <dd><p>This operation creates a vector in which element <var>i</var> is equal to

  128. &lsquo;<samp><var>base</var> + <var>i</var>*<var>step</var></samp>&rsquo;.  <var>m</var> must be a vector integer mode.

  129. </p></dd>

  130. </dl>

  131. 

  132. <hr>

  133. <div class="header">

  134. <p>

  135. Next: <a href="Conversions.html#Conversions" accesskey="n" rel="next">Conversions</a>, Previous: <a href="Bit_002dFields.html#Bit_002dFields" accesskey="p" rel="prev">Bit-Fields</a>, Up: <a href="RTL.html#RTL" accesskey="u" rel="up">RTL</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>

  136. </div>

  137. 

  138. 

  139. 

  140. </body>

  141. </html>