1<html lang="en"> 2<head> 3<title>PDP-11 Options - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Submodel-Options.html#Submodel-Options" title="Submodel Options"> 9<link rel="prev" href="MN10300-Options.html#MN10300-Options" title="MN10300 Options"> 10<link rel="next" href="picoChip-Options.html#picoChip-Options" title="picoChip Options"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 141998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 152010 Free Software Foundation, Inc. 16 17Permission is granted to copy, distribute and/or modify this document 18under the terms of the GNU Free Documentation License, Version 1.3 or 19any later version published by the Free Software Foundation; with the 20Invariant Sections being ``Funding Free Software'', the Front-Cover 21Texts being (a) (see below), and with the Back-Cover Texts being (b) 22(see below). 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This is the default. (FIS floating 66point on the PDP-11/40 is not supported.) 67 68 <br><dt><code>-msoft-float</code><dd><a name="index-msoft_002dfloat-1772"></a>Do not use hardware floating point. 69 70 <br><dt><code>-mac0</code><dd><a name="index-mac0-1773"></a>Return floating-point results in ac0 (fr0 in Unix assembler syntax). 71 72 <br><dt><code>-mno-ac0</code><dd><a name="index-mno_002dac0-1774"></a>Return floating-point results in memory. This is the default. 73 74 <br><dt><code>-m40</code><dd><a name="index-m40-1775"></a>Generate code for a PDP-11/40. 75 76 <br><dt><code>-m45</code><dd><a name="index-m45-1776"></a>Generate code for a PDP-11/45. This is the default. 77 78 <br><dt><code>-m10</code><dd><a name="index-m10-1777"></a>Generate code for a PDP-11/10. 79 80 <br><dt><code>-mbcopy-builtin</code><dd><a name="index-mbcopy_002dbuiltin-1778"></a>Use inline <code>movmemhi</code> patterns for copying memory. This is the 81default. 82 83 <br><dt><code>-mbcopy</code><dd><a name="index-mbcopy-1779"></a>Do not use inline <code>movmemhi</code> patterns for copying memory. 84 85 <br><dt><code>-mint16</code><dt><code>-mno-int32</code><dd><a name="index-mint16-1780"></a><a name="index-mno_002dint32-1781"></a>Use 16-bit <code>int</code>. This is the default. 86 87 <br><dt><code>-mint32</code><dt><code>-mno-int16</code><dd><a name="index-mint32-1782"></a><a name="index-mno_002dint16-1783"></a>Use 32-bit <code>int</code>. 88 89 <br><dt><code>-mfloat64</code><dt><code>-mno-float32</code><dd><a name="index-mfloat64-1784"></a><a name="index-mno_002dfloat32-1785"></a>Use 64-bit <code>float</code>. This is the default. 90 91 <br><dt><code>-mfloat32</code><dt><code>-mno-float64</code><dd><a name="index-mfloat32-1786"></a><a name="index-mno_002dfloat64-1787"></a>Use 32-bit <code>float</code>. 92 93 <br><dt><code>-mabshi</code><dd><a name="index-mabshi-1788"></a>Use <code>abshi2</code> pattern. This is the default. 94 95 <br><dt><code>-mno-abshi</code><dd><a name="index-mno_002dabshi-1789"></a>Do not use <code>abshi2</code> pattern. 96 97 <br><dt><code>-mbranch-expensive</code><dd><a name="index-mbranch_002dexpensive-1790"></a>Pretend that branches are expensive. This is for experimenting with 98code generation only. 99 100 <br><dt><code>-mbranch-cheap</code><dd><a name="index-mbranch_002dcheap-1791"></a>Do not pretend that branches are expensive. This is the default. 101 102 <br><dt><code>-munix-asm</code><dd><a name="index-munix_002dasm-1792"></a>Use Unix assembler syntax. This is the default when configured for 103‘<samp><span class="samp">pdp11-*-bsd</span></samp>’. 104 105 <br><dt><code>-mdec-asm</code><dd><a name="index-mdec_002dasm-1793"></a>Use DEC assembler syntax. This is the default when configured for any 106PDP-11 target other than ‘<samp><span class="samp">pdp11-*-bsd</span></samp>’. 107</dl> 108 109 </body></html> 110 111