You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
3.8 KiB
HTML
93 lines
3.8 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Stack Registers - GNU Compiler Collection (GCC) Internals</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="GNU Compiler Collection (GCC) Internals">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Registers.html#Registers" title="Registers">
|
|
<link rel="prev" href="Leaf-Functions.html#Leaf-Functions" title="Leaf Functions">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
Copyright (C) 1988-2015 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
|
any later version published by the Free Software Foundation; with the
|
|
Invariant Sections being ``Funding Free Software'', the Front-Cover
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
|
(see below). A copy of the license is included in the section entitled
|
|
``GNU Free Documentation License''.
|
|
|
|
(a) The FSF's Front-Cover Text is:
|
|
|
|
A GNU Manual
|
|
|
|
(b) The FSF's Back-Cover Text is:
|
|
|
|
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 }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="Stack-Registers"></a>
|
|
<p>
|
|
Previous: <a rel="previous" accesskey="p" href="Leaf-Functions.html#Leaf-Functions">Leaf Functions</a>,
|
|
Up: <a rel="up" accesskey="u" href="Registers.html#Registers">Registers</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h4 class="subsection">17.7.5 Registers That Form a Stack</h4>
|
|
|
|
<p>There are special features to handle computers where some of the
|
|
“registers” form a stack. Stack registers are normally written by
|
|
pushing onto the stack, and are numbered relative to the top of the
|
|
stack.
|
|
|
|
<p>Currently, GCC can only handle one group of stack-like registers, and
|
|
they must be consecutively numbered. Furthermore, the existing
|
|
support for stack-like registers is specific to the 80387 floating
|
|
point coprocessor. If you have a new architecture that uses
|
|
stack-like registers, you will need to do substantial work on
|
|
<samp><span class="file">reg-stack.c</span></samp> and write your machine description to cooperate
|
|
with it, as well as defining these macros.
|
|
|
|
<div class="defun">
|
|
— Macro: <b>STACK_REGS</b><var><a name="index-STACK_005fREGS-4094"></a></var><br>
|
|
<blockquote><p>Define this if the machine has any stack-like registers.
|
|
</p></blockquote></div>
|
|
|
|
<div class="defun">
|
|
— Macro: <b>STACK_REG_COVER_CLASS</b><var><a name="index-STACK_005fREG_005fCOVER_005fCLASS-4095"></a></var><br>
|
|
<blockquote><p>This is a cover class containing the stack registers. Define this if
|
|
the machine has any stack-like registers.
|
|
</p></blockquote></div>
|
|
|
|
<div class="defun">
|
|
— Macro: <b>FIRST_STACK_REG</b><var><a name="index-FIRST_005fSTACK_005fREG-4096"></a></var><br>
|
|
<blockquote><p>The number of the first stack-like register. This one is the top
|
|
of the stack.
|
|
</p></blockquote></div>
|
|
|
|
<div class="defun">
|
|
— Macro: <b>LAST_STACK_REG</b><var><a name="index-LAST_005fSTACK_005fREG-4097"></a></var><br>
|
|
<blockquote><p>The number of the last stack-like register. This one is the bottom of
|
|
the stack.
|
|
</p></blockquote></div>
|
|
|
|
</body></html>
|
|
|