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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/gccint/Data-Output.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gccint/Data-Output.html b/share/doc/gccint/Data-Output.html new file mode 100644 index 0000000..2e85ea6 --- /dev/null +++ b/share/doc/gccint/Data-Output.html @@ -0,0 +1,278 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1988-2023 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. --> +<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>GNU Compiler Collection (GCC) Internals: Data Output</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Data Output"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Data Output"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<link href="index.html#Top" rel="start" title="Top"> +<link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Assembler-Format.html#Assembler-Format" rel="up" title="Assembler Format"> +<link href="Uninitialized-Data.html#Uninitialized-Data" rel="next" title="Uninitialized Data"> +<link href="File-Framework.html#File-Framework" rel="previous" title="File Framework"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.smallquotation {font-size: smaller} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.indentedblock {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +div.smalldisplay {margin-left: 3.2em} +div.smallexample {margin-left: 3.2em} +div.smallindentedblock {margin-left: 3.2em; font-size: smaller} +div.smalllisp {margin-left: 3.2em} +kbd {font-style:oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: inherit; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: inherit; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.nocodebreak {white-space:nowrap} +span.nolinebreak {white-space:nowrap} +span.roman {font-family:serif; font-weight:normal} +span.sansserif {font-family:sans-serif; font-weight:normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Data-Output"></a> +<div class="header"> +<p> +Next: <a href="Uninitialized-Data.html#Uninitialized-Data" accesskey="n" rel="next">Uninitialized Data</a>, Previous: <a href="File-Framework.html#File-Framework" accesskey="p" rel="previous">File Framework</a>, Up: <a href="Assembler-Format.html#Assembler-Format" accesskey="u" rel="up">Assembler Format</a> [<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> +</div> +<hr> +<a name="Output-of-Data"></a> +<h4 class="subsection">18.20.2 Output of Data</h4> + + +<dl> +<dt><a name="index-TARGET_005fASM_005fBYTE_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_BYTE_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fHI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_HI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fPSI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_PSI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fSI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_SI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fPDI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_PDI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fDI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_DI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fPTI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_PTI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fALIGNED_005fTI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_ALIGNED_TI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fHI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_HI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fPSI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_PSI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fSI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_SI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fPDI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_PDI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fDI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_DI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fPTI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_PTI_OP</strong></dt> +<dt><a name="index-TARGET_005fASM_005fUNALIGNED_005fTI_005fOP"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_UNALIGNED_TI_OP</strong></dt> +<dd><p>These hooks specify assembly directives for creating certain kinds +of integer object. The <code>TARGET_ASM_BYTE_OP</code> directive creates a +byte-sized object, the <code>TARGET_ASM_ALIGNED_HI_OP</code> one creates an +aligned two-byte object, and so on. Any of the hooks may be +<code>NULL</code>, indicating that no suitable directive is available. +</p> +<p>The compiler will print these strings at the start of a new line, +followed immediately by the object’s initial value. In most cases, +the string should contain a tab, a pseudo-op, and then another tab. +</p></dd></dl> + +<dl> +<dt><a name="index-TARGET_005fASM_005fINTEGER"></a>Target Hook: <em>bool</em> <strong>TARGET_ASM_INTEGER</strong> <em>(rtx <var>x</var>, unsigned int <var>size</var>, int <var>aligned_p</var>)</em></dt> +<dd><p>The <code>assemble_integer</code> function uses this hook to output an +integer object. <var>x</var> is the object’s value, <var>size</var> is its size +in bytes and <var>aligned_p</var> indicates whether it is aligned. The +function should return <code>true</code> if it was able to output the +object. If it returns false, <code>assemble_integer</code> will try to +split the object into smaller parts. +</p> +<p>The default implementation of this hook will use the +<code>TARGET_ASM_BYTE_OP</code> family of strings, returning <code>false</code> +when the relevant string is <code>NULL</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-TARGET_005fASM_005fDECL_005fEND"></a>Target Hook: <em>void</em> <strong>TARGET_ASM_DECL_END</strong> <em>(void)</em></dt> +<dd><p>Define this hook if the target assembler requires a special marker to +terminate an initialized variable declaration. +</p></dd></dl> + +<dl> +<dt><a name="index-TARGET_005fASM_005fOUTPUT_005fADDR_005fCONST_005fEXTRA"></a>Target Hook: <em>bool</em> <strong>TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA</strong> <em>(FILE *<var>file</var>, rtx <var>x</var>)</em></dt> +<dd><p>A target hook to recognize <var>rtx</var> patterns that <code>output_addr_const</code> +can’t deal with, and output assembly code to <var>file</var> corresponding to +the pattern <var>x</var>. This may be used to allow machine-dependent +<code>UNSPEC</code>s to appear within constants. +</p> +<p>If target hook fails to recognize a pattern, it must return <code>false</code>, +so that a standard error message is printed. If it prints an error message +itself, by calling, for example, <code>output_operand_lossage</code>, it may just +return <code>true</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-ASM_005fOUTPUT_005fASCII"></a>Macro: <strong>ASM_OUTPUT_ASCII</strong> <em>(<var>stream</var>, <var>ptr</var>, <var>len</var>)</em></dt> +<dd><p>A C statement to output to the stdio stream <var>stream</var> an assembler +instruction to assemble a string constant containing the <var>len</var> +bytes at <var>ptr</var>. <var>ptr</var> will be a C expression of type +<code>char *</code> and <var>len</var> a C expression of type <code>int</code>. +</p> +<p>If the assembler has a <code>.ascii</code> pseudo-op as found in the +Berkeley Unix assembler, do not define the macro +<code>ASM_OUTPUT_ASCII</code>. +</p></dd></dl> + +<dl> +<dt><a name="index-ASM_005fOUTPUT_005fFDESC"></a>Macro: <strong>ASM_OUTPUT_FDESC</strong> <em>(<var>stream</var>, <var>decl</var>, <var>n</var>)</em></dt> +<dd><p>A C statement to output word <var>n</var> of a function descriptor for +<var>decl</var>. This must be defined if <code>TARGET_VTABLE_USES_DESCRIPTORS</code> +is defined, and is otherwise unused. +</p></dd></dl> + +<dl> +<dt><a name="index-CONSTANT_005fPOOL_005fBEFORE_005fFUNCTION"></a>Macro: <strong>CONSTANT_POOL_BEFORE_FUNCTION</strong></dt> +<dd><p>You may define this macro as a C expression. You should define the +expression to have a nonzero value if GCC should output the constant +pool for a function before the code for the function, or a zero value if +GCC should output the constant pool after the function. If you do +not define this macro, the usual case, GCC will output the constant +pool before the function. +</p></dd></dl> + +<dl> +<dt><a name="index-ASM_005fOUTPUT_005fPOOL_005fPROLOGUE"></a>Macro: <strong>ASM_OUTPUT_POOL_PROLOGUE</strong> <em>(<var>file</var>, <var>funname</var>, <var>fundecl</var>, <var>size</var>)</em></dt> +<dd><p>A C statement to output assembler commands to define the start of the +constant pool for a function. <var>funname</var> is a string giving +the name of the function. Should the return type of the function +be required, it can be obtained via <var>fundecl</var>. <var>size</var> +is the size, in bytes, of the constant pool that will be written +immediately after this call. +</p> +<p>If no constant-pool prefix is required, the usual case, this macro need +not be defined. +</p></dd></dl> + +<dl> +<dt><a name="index-ASM_005fOUTPUT_005fSPECIAL_005fPOOL_005fENTRY"></a>Macro: <strong>ASM_OUTPUT_SPECIAL_POOL_ENTRY</strong> <em>(<var>file</var>, <var>x</var>, <var>mode</var>, <var>align</var>, <var>labelno</var>, <var>jumpto</var>)</em></dt> +<dd><p>A C statement (with or without semicolon) to output a constant in the +constant pool, if it needs special treatment. (This macro need not do +anything for RTL expressions that can be output normally.) +</p> +<p>The argument <var>file</var> is the standard I/O stream to output the +assembler code on. <var>x</var> is the RTL expression for the constant to +output, and <var>mode</var> is the machine mode (in case <var>x</var> is a +‘<samp>const_int</samp>’). <var>align</var> is the required alignment for the value +<var>x</var>; you should output an assembler directive to force this much +alignment. +</p> +<p>The argument <var>labelno</var> is a number to use in an internal label for +the address of this pool entry. The definition of this macro is +responsible for outputting the label definition at the proper place. +Here is how to do this: +</p> +<div class="smallexample"> +<pre class="smallexample"><code>(*targetm.asm_out.internal_label)</code> (<var>file</var>, "LC", <var>labelno</var>); +</pre></div> + +<p>When you output a pool entry specially, you should end with a +<code>goto</code> to the label <var>jumpto</var>. This will prevent the same pool +entry from being output a second time in the usual manner. +</p> +<p>You need not define this macro if it would do nothing. +</p></dd></dl> + +<dl> +<dt><a name="index-ASM_005fOUTPUT_005fPOOL_005fEPILOGUE"></a>Macro: <strong>ASM_OUTPUT_POOL_EPILOGUE</strong> <em>(<var>file</var> <var>funname</var> <var>fundecl</var> <var>size</var>)</em></dt> +<dd><p>A C statement to output assembler commands to at the end of the constant +pool for a function. <var>funname</var> is a string giving the name of the +function. Should the return type of the function be required, you can +obtain it via <var>fundecl</var>. <var>size</var> is the size, in bytes, of the +constant pool that GCC wrote immediately before this call. +</p> +<p>If no constant-pool epilogue is required, the usual case, you need not +define this macro. +</p></dd></dl> + +<dl> +<dt><a name="index-IS_005fASM_005fLOGICAL_005fLINE_005fSEPARATOR"></a>Macro: <strong>IS_ASM_LOGICAL_LINE_SEPARATOR</strong> <em>(<var>C</var>, <var>STR</var>)</em></dt> +<dd><p>Define this macro as a C expression which is nonzero if <var>C</var> is +used as a logical line separator by the assembler. <var>STR</var> points +to the position in the string where <var>C</var> was found; this can be used if +a line separator uses multiple characters. +</p> +<p>If you do not define this macro, the default is that only +the character ‘<samp>;</samp>’ is treated as a logical line separator. +</p></dd></dl> + +<dl> +<dt><a name="index-TARGET_005fASM_005fOPEN_005fPAREN"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_OPEN_PAREN</strong></dt> +<dt><a name="index-TARGET_005fASM_005fCLOSE_005fPAREN"></a>Target Hook: <em>const char *</em> <strong>TARGET_ASM_CLOSE_PAREN</strong></dt> +<dd><p>These target hooks are C string constants, describing the syntax in the +assembler for grouping arithmetic expressions. If not overridden, they +default to normal parentheses, which is correct for most assemblers. +</p></dd></dl> + +<p>These macros are provided by <samp>real.h</samp> for writing the definitions +of <code>ASM_OUTPUT_DOUBLE</code> and the like: +</p> +<dl> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fSINGLE"></a>Macro: <strong>REAL_VALUE_TO_TARGET_SINGLE</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fDOUBLE"></a>Macro: <strong>REAL_VALUE_TO_TARGET_DOUBLE</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fLONG_005fDOUBLE"></a>Macro: <strong>REAL_VALUE_TO_TARGET_LONG_DOUBLE</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fDECIMAL32"></a>Macro: <strong>REAL_VALUE_TO_TARGET_DECIMAL32</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fDECIMAL64"></a>Macro: <strong>REAL_VALUE_TO_TARGET_DECIMAL64</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dt><a name="index-REAL_005fVALUE_005fTO_005fTARGET_005fDECIMAL128"></a>Macro: <strong>REAL_VALUE_TO_TARGET_DECIMAL128</strong> <em>(<var>x</var>, <var>l</var>)</em></dt> +<dd><p>These translate <var>x</var>, of type <code>REAL_VALUE_TYPE</code>, to the +target’s floating point representation, and store its bit pattern in +the variable <var>l</var>. For <code>REAL_VALUE_TO_TARGET_SINGLE</code> and +<code>REAL_VALUE_TO_TARGET_DECIMAL32</code>, this variable should be a +simple <code>long int</code>. For the others, it should be an array of +<code>long int</code>. The number of elements in this array is determined +by the size of the desired target floating point data type: 32 bits of +it go in each <code>long int</code> array element. Each array element holds +32 bits of the result, even if <code>long int</code> is wider than 32 bits +on the host machine. +</p> +<p>The array element values are designed so that you can print them out +using <code>fprintf</code> in the order they should appear in the target +machine’s memory. +</p></dd></dl> + +<hr> +<div class="header"> +<p> +Next: <a href="Uninitialized-Data.html#Uninitialized-Data" accesskey="n" rel="next">Uninitialized Data</a>, Previous: <a href="File-Framework.html#File-Framework" accesskey="p" rel="previous">File Framework</a>, Up: <a href="Assembler-Format.html#Assembler-Format" accesskey="u" rel="up">Assembler Format</a> [<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> +</div> + + + +</body> +</html> |