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New %s inline asm format specifier

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2442 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2003-09-16 20:35:37 +00:00
parent 5537aee205
commit ffb77285de
2 changed files with 46 additions and 8 deletions
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3
doc/cc65.sgml
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@ -910,6 +910,7 @@ 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/%s/ - The argument is converted to a string
<item><tt/%%/ - The % sign itself
</itemize><p>
@ -949,7 +950,7 @@ variables or functions into your asm statements. Code like this
<p>
may stop working if the way, the compiler generates these names is changed in
a future version.
a future version. Instead use the format specifiers from the table above.
<p>

51
src/cc65/asmstmt.c
View File

@ -7,8 +7,8 @@
/* */
/* */
/* (C) 2001-2003 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@musoftware.de */
/* */
/* */
@ -274,6 +274,41 @@ static void ParseLVarArg (StrBuf* T, unsigned Arg)
static void ParseStrArg (StrBuf* T, unsigned Arg attribute ((unused)))
/* Parse the %s format specifier */
{
ExprDesc Expr;
char Buf [64];
/* We expect an argument separated by a comma */
ConsumeComma ();
/* Check what comes */
switch (CurTok.Tok) {
case TOK_IDENT:
/* Identifier */
SB_AppendStr (T, CurTok.Ident);
NextToken ();
break;
case TOK_SCONST:
/* String constant */
SB_AppendStr (T, GetLiteral (CurTok.IVal));
ResetLiteralPoolOffs (CurTok.IVal);
NextToken ();
break;
default:
ConstSubExpr (hie1, InitExprDesc (&Expr));
xsprintf (Buf, sizeof (Buf), "%ld", Expr.ConstVal);
SB_AppendStr (T, Buf);
break;
}
}
static void ParseAsm (void)
/* Parse the contents of the ASM statement */
{
@ -304,6 +339,7 @@ static void ParseAsm (void)
* %l - Numerical 32 bit value
* %v - Assembler name of a (global) variable
* %o - Stack offset of a (local) variable
* %s - Any argument converted to a string (almost)
* %% - The % sign
*/
Arg = 0;
@ -322,12 +358,13 @@ static void ParseAsm (void)
++Arg;
C = SB_Get (&S);
switch (C) {
case 'b': ParseByteArg (&T, Arg); break;
case 'w': ParseWordArg (&T, Arg); break;
case 'l': ParseLongArg (&T, Arg); break;
case 'v': ParseGVarArg (&T, Arg); break;
case 'o': ParseLVarArg (&T, Arg); break;
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;
default:
Error ("Error in __asm__ format specifier %u", Arg);
AsmErrorSkip ();