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Inline assembly can now reference C labels with the %g format specifier

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git-svn-id: svn://svn.cc65.org/cc65/trunk@3128 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2004-06-15 20:08:01 +00:00
parent a3e6fbd21f
commit 9cb7015055
2 changed files with 36 additions and 7 deletions
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1
doc/cc65.sgml
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@ -957,6 +957,7 @@ the format specifier before passing the assembly code line to the backend.
<item><tt/%l/ - Numerical 32 bit value
<item><tt/%v/ - Assembler name of a (global) variable or function
<item><tt/%o/ - Stack offset of a (local) variable
<item><tt/%g/ - Assembler name of a C label
<item><tt/%s/ - The argument is converted to a string
<item><tt/%%/ - The % sign itself
</itemize><p>

42
src/cc65/asmstmt.c
View File

@ -39,6 +39,7 @@
#include "xsprintf.h"
/* cc65 */
#include "asmlabel.h"
#include "codegen.h"
#include "datatype.h"
#include "error.h"
@ -275,6 +276,31 @@ static void ParseLVarArg (StrBuf* T, unsigned Arg)
static void ParseLabelArg (StrBuf* T, unsigned Arg attribute ((unused)))
/* Parse the %g format specifier */
{
/* We expect an identifier separated by a comma */
ConsumeComma ();
if (CurTok.Tok != TOK_IDENT) {
Error ("Label name expected");
} else {
/* Add a new label symbol if we don't have one until now */
SymEntry* Entry = AddLabelSym (CurTok.Ident, SC_REF);
/* Append the label name to the buffer */
SB_AppendStr (T, LocalLabelName (Entry->V.Label));
/* Eat the label name */
NextToken ();
}
}
static void ParseStrArg (StrBuf* T, unsigned Arg attribute ((unused)))
/* Parse the %s format specifier */
{
@ -340,6 +366,7 @@ static void ParseAsm (void)
* %l - Numerical 32 bit value
* %v - Assembler name of a (global) variable
* %o - Stack offset of a (local) variable
* %g - Assembler name of a C label
* %s - Any argument converted to a string (almost)
* %% - The % sign
*/
@ -359,13 +386,14 @@ static void ParseAsm (void)
++Arg;
C = SB_Get (&S);
switch (C) {
case '%': SB_AppendChar (&T, '%'); break;
case 'b': ParseByteArg (&T, Arg); break;
case 'l': ParseLongArg (&T, Arg); break;
case 'o': ParseLVarArg (&T, Arg); break;
case 's': ParseStrArg (&T, Arg); break;
case 'v': ParseGVarArg (&T, Arg); break;
case 'w': ParseWordArg (&T, Arg); break;
case '%': SB_AppendChar (&T, '%'); break;
case 'b': ParseByteArg (&T, Arg); break;
case 'g': ParseLabelArg (&T, Arg); break;
case 'l': ParseLongArg (&T, Arg); break;
case 'o': ParseLVarArg (&T, Arg); break;
case 's': ParseStrArg (&T, Arg); break;
case 'v': ParseGVarArg (&T, Arg); break;
case 'w': ParseWordArg (&T, Arg); break;
default:
Error ("Error in __asm__ format specifier %u", Arg);
AsmErrorSkip ();