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a13284a792
@ -2316,6 +2316,24 @@ Here's a list of all control commands and a description, what they do:
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</verb></tscreen>
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<sect1><tt>.ISMNEM, .ISMNEMONIC</tt><label id=".ISMNEMONIC"><p>
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Builtin function. The function expects an identifier as argument in braces.
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The argument is evaluated, and the function yields "true" if the identifier
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is defined as an instruction mnemonic that is recognized by the assembler.
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Example:
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<tscreen><verb>
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.if .not .ismnemonic(ina)
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.macro ina
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clc
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adc #$01
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.endmacro
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.endif
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</verb></tscreen>
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<sect1><tt>.DESTRUCTOR</tt><label id=".DESTRUCTOR"><p>
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Export a symbol and mark it as a module destructor. This may be used
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@ -62,6 +62,7 @@
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#include "symtab.h"
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#include "toklist.h"
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#include "ulabel.h"
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#include "macro.h"
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@ -417,6 +418,34 @@ static ExprNode* FuncDefined (void)
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static ExprNode* FuncIsMnemonic (void)
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/* Handle the .ISMNEMONIC, .ISMNEM builtin function */
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{
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int Instr = -1;
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/* Check for a macro or an instruction depending on UbiquitousIdents */
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if (CurTok.Tok == TOK_IDENT) {
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if (UbiquitousIdents) {
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/* Macros CAN be instructions, so check for them first */
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if (FindMacro (&CurTok.SVal) == 0) {
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Instr = FindInstruction (&CurTok.SVal);
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}
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} else {
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/* Macros and symbols may NOT use the names of instructions, so just check for the instruction */
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Instr = FindInstruction (&CurTok.SVal);
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}
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} else {
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Error ("Identifier expected.");
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}
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/* Skip the name */
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NextTok ();
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return GenLiteralExpr (Instr > 0);
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}
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ExprNode* FuncHiByte (void)
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/* Handle the .HIBYTE builtin function */
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{
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@ -1065,6 +1094,10 @@ static ExprNode* Factor (void)
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N = Function (FuncDefined);
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break;
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case TOK_ISMNEMONIC:
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N = Function (FuncIsMnemonic);
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break;
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case TOK_HIBYTE:
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N = Function (FuncHiByte);
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break;
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@ -2040,6 +2040,7 @@ static CtrlDesc CtrlCmdTab [] = {
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{ ccNone, DoIncBin },
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{ ccNone, DoInclude },
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{ ccNone, DoInterruptor },
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{ ccNone, DoUnexpected }, /* .ISMNEMONIC */
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{ ccNone, DoInvalid }, /* .LEFT */
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{ ccNone, DoLineCont },
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{ ccNone, DoList },
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@ -223,6 +223,8 @@ struct DotKeyword {
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{ ".INCBIN", TOK_INCBIN },
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{ ".INCLUDE", TOK_INCLUDE },
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{ ".INTERRUPTOR", TOK_INTERRUPTOR },
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{ ".ISMNEM", TOK_ISMNEMONIC },
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{ ".ISMNEMONIC", TOK_ISMNEMONIC },
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{ ".LEFT", TOK_LEFT },
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{ ".LINECONT", TOK_LINECONT },
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{ ".LIST", TOK_LIST },
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@ -199,6 +199,7 @@ typedef enum token_t {
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TOK_INCBIN,
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TOK_INCLUDE,
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TOK_INTERRUPTOR,
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TOK_ISMNEMONIC,
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TOK_LEFT,
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TOK_LINECONT,
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TOK_LIST,
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