MIPS-Floating_002dPoint.html 4.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596
  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  2. <html>
  3. <!-- This file documents the GNU Assembler "as".
  4. Copyright (C) 1991-2017 Free Software Foundation, Inc.
  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
  7. or any later version published by the Free Software Foundation;
  8. with no Invariant Sections, with no Front-Cover Texts, and with no
  9. Back-Cover Texts. A copy of the license is included in the
  10. section entitled "GNU Free Documentation License".
  11. -->
  12. <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
  13. <head>
  14. <title>Using as: MIPS Floating-Point</title>
  15. <meta name="description" content="Using as: MIPS Floating-Point">
  16. <meta name="keywords" content="Using as: MIPS Floating-Point">
  17. <meta name="resource-type" content="document">
  18. <meta name="distribution" content="global">
  19. <meta name="Generator" content="makeinfo">
  20. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  21. <link href="index.html#Top" rel="start" title="Top">
  22. <link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
  23. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
  24. <link href="MIPS_002dDependent.html#MIPS_002dDependent" rel="up" title="MIPS-Dependent">
  25. <link href="MIPS-Syntax.html#MIPS-Syntax" rel="next" title="MIPS Syntax">
  26. <link href="MIPS-ASE-Instruction-Generation-Overrides.html#MIPS-ASE-Instruction-Generation-Overrides" rel="prev" title="MIPS ASE Instruction Generation Overrides">
  27. <style type="text/css">
  28. <!--
  29. a.summary-letter {text-decoration: none}
  30. blockquote.smallquotation {font-size: smaller}
  31. div.display {margin-left: 3.2em}
  32. div.example {margin-left: 3.2em}
  33. div.indentedblock {margin-left: 3.2em}
  34. div.lisp {margin-left: 3.2em}
  35. div.smalldisplay {margin-left: 3.2em}
  36. div.smallexample {margin-left: 3.2em}
  37. div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
  38. div.smalllisp {margin-left: 3.2em}
  39. kbd {font-style:oblique}
  40. pre.display {font-family: inherit}
  41. pre.format {font-family: inherit}
  42. pre.menu-comment {font-family: serif}
  43. pre.menu-preformatted {font-family: serif}
  44. pre.smalldisplay {font-family: inherit; font-size: smaller}
  45. pre.smallexample {font-size: smaller}
  46. pre.smallformat {font-family: inherit; font-size: smaller}
  47. pre.smalllisp {font-size: smaller}
  48. span.nocodebreak {white-space:nowrap}
  49. span.nolinebreak {white-space:nowrap}
  50. span.roman {font-family:serif; font-weight:normal}
  51. span.sansserif {font-family:sans-serif; font-weight:normal}
  52. ul.no-bullet {list-style: none}
  53. -->
  54. </style>
  55. </head>
  56. <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
  57. <a name="MIPS-Floating_002dPoint"></a>
  58. <div class="header">
  59. <p>
  60. Next: <a href="MIPS-Syntax.html#MIPS-Syntax" accesskey="n" rel="next">MIPS Syntax</a>, Previous: <a href="MIPS-ASE-Instruction-Generation-Overrides.html#MIPS-ASE-Instruction-Generation-Overrides" accesskey="p" rel="prev">MIPS ASE Instruction Generation Overrides</a>, Up: <a href="MIPS_002dDependent.html#MIPS_002dDependent" accesskey="u" rel="up">MIPS-Dependent</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
  61. </div>
  62. <hr>
  63. <a name="Directives-to-override-floating_002dpoint-options"></a>
  64. <h4 class="subsection">9.27.13 Directives to override floating-point options</h4>
  65. <a name="index-Disable-floating_002dpoint-instructions"></a>
  66. <a name="index-_002eset-softfloat"></a>
  67. <a name="index-_002eset-hardfloat"></a>
  68. <p>The directives <code>.set softfloat</code> and <code>.set hardfloat</code> provide
  69. finer control of disabling and enabling float-point instructions.
  70. These directives always override the default (that hard-float
  71. instructions are accepted) or the command-line options
  72. (&lsquo;<samp>-msoft-float</samp>&rsquo; and &lsquo;<samp>-mhard-float</samp>&rsquo;).
  73. </p>
  74. <a name="index-Disable-single_002dprecision-floating_002dpoint-operations"></a>
  75. <a name="index-_002eset-singlefloat"></a>
  76. <a name="index-_002eset-doublefloat"></a>
  77. <p>The directives <code>.set singlefloat</code> and <code>.set doublefloat</code>
  78. provide finer control of disabling and enabling double-precision
  79. float-point operations. These directives always override the default
  80. (that double-precision operations are accepted) or the command-line
  81. options (&lsquo;<samp>-msingle-float</samp>&rsquo; and &lsquo;<samp>-mdouble-float</samp>&rsquo;).
  82. </p>
  83. <p>Traditional MIPS assemblers do not support these directives.
  84. </p>
  85. </body>
  86. </html>