📄 mmix-options.html

📁 自己收集的linux入门到学懂高级编程书集包括linux程序设计第三版
💻 HTML
字号:
<html lang="en"><head><title>Using the GNU Compiler Collection (GCC)</title><meta http-equiv="Content-Type" content="text/html"><meta name="description" content="Using the GNU Compiler Collection (GCC)"><meta name="generator" content="makeinfo 4.6"><!--Copyright &copy; 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.   <p>Permission is granted to copy, distribute and/or modify this documentunder the terms of the GNU Free Documentation License, Version 1.2 orany later version published by the Free Software Foundation; with theInvariant Sections being "GNU General Public License" and "FundingFree Software", the Front-Cover texts being (a) (see below), and withthe Back-Cover Texts being (b) (see below).  A copy of the license isincluded in the section entitled "GNU Free Documentation License".   <p>(a) The FSF's Front-Cover Text is:   <p>A GNU Manual   <p>(b) The FSF's Back-Cover Text is:   <p>You have freedom to copy and modify this GNU Manual, like GNU     software.  Copies published by the Free Software Foundation raise     funds for GNU development.--><meta http-equiv="Content-Style-Type" content="text/css"><style type="text/css"><!--  pre.display { font-family:inherit }  pre.format  { font-family:inherit }  pre.smalldisplay { font-family:inherit; font-size:smaller }  pre.smallformat  { font-family:inherit; font-size:smaller }  pre.smallexample { font-size:smaller }  pre.smalllisp    { font-size:smaller }--></style></head><body><div class="node"><p>Node:&nbsp;<a name="MMIX%20Options">MMIX Options</a>,Next:&nbsp;<a rel="next" accesskey="n" href="PDP-11-Options.html#PDP-11%20Options">PDP-11 Options</a>,Previous:&nbsp;<a rel="previous" accesskey="p" href="CRIS-Options.html#CRIS%20Options">CRIS Options</a>,Up:&nbsp;<a rel="up" accesskey="u" href="Submodel-Options.html#Submodel%20Options">Submodel Options</a><hr><br></div><h3 class="subsection">MMIX Options</h4><p>These options are defined for the MMIX:     <dl><dt><code>-mlibfuncs</code>     <dd><dt><code>-mno-libfuncs</code>     <dd>Specify that intrinsic library functions are being compiled, passing allvalues in registers, no matter the size.     <br><dt><code>-mepsilon</code>     <dd><dt><code>-mno-epsilon</code>     <dd>Generate floating-point comparison instructions that compare with respectto the <code>rE</code> epsilon register.     <br><dt><code>-mabi=mmixware</code>     <dd><dt><code>-mabi=gnu</code>     <dd>Generate code that passes function parameters and return values that (inthe called function) are seen as registers <code>$0</code> and up, as opposed tothe GNU ABI which uses global registers <code>$231</code> and up.     <br><dt><code>-mzero-extend</code>     <dd><dt><code>-mno-zero-extend</code>     <dd>When reading data from memory in sizes shorter than 64 bits, use (do notuse) zero-extending load instructions by default, rather thansign-extending ones.     <br><dt><code>-mknuthdiv</code>     <dd><dt><code>-mno-knuthdiv</code>     <dd>Make the result of a division yielding a remainder have the same sign asthe divisor.  With the default, <code>-mno-knuthdiv</code>, the sign of theremainder follows the sign of the dividend.  Both methods arearithmetically valid, the latter being almost exclusively used.     <br><dt><code>-mtoplevel-symbols</code>     <dd><dt><code>-mno-toplevel-symbols</code>     <dd>Prepend (do not prepend) a <code>:</code> to all global symbols, so the assemblycode can be used with the <code>PREFIX</code> assembly directive.     <br><dt><code>-melf</code>     <dd>Generate an executable in the ELF format, rather than the default<code>mmo</code> format used by the <code>mmix</code> simulator.     <br><dt><code>-mbranch-predict</code>     <dd><dt><code>-mno-branch-predict</code>     <dd>Use (do not use) the probable-branch instructions, when static branchprediction indicates a probable branch.     <br><dt><code>-mbase-addresses</code>     <dd><dt><code>-mno-base-addresses</code>     <dd>Generate (do not generate) code that uses <em>base addresses</em>.  Using abase address automatically generates a request (handled by the assemblerand the linker) for a constant to be set up in a global register.  Theregister is used for one or more base address requests within the range 0to 255 from the value held in the register.  The generally leads to shortand fast code, but the number of different data items that can beaddressed is limited.  This means that a program that uses lots of staticdata may require <code>-mno-base-addresses</code>.     <br><dt><code>-msingle-exit</code>     <dd><dt><code>-mno-single-exit</code>     <dd>Force (do not force) generated code to have a single exit point in eachfunction. </dl>   </body></html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -