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let_output_byte.js
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let_output_byte.js
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/*****************************************************************************
LET BYTE
*****************************************************************************/
//============================================================================
// Output code for byte expression
//============================================================================
function output6502CodeForByteExpression() {
let opcode_nr = 0;
for( var i=0; i<tac.length; i++) {
if ( tac[i].load_left != false ) {
emitLDA( tac[i].left_value );
}
switch ( tac[i].operator ) {
case "+":
if ( opcode_nr == 0 || target_operand.data_type == "byte" ) {
emitCLC();
}
emitADC( tac[i].right_value );
break;
case "-":
emitSEC();
emitSBC( tac[i].right_value );
break;
case "*":
if ( tac[i].right_addressing_mode == "imm" ) {
emitMacro( "+_IMUL888I_ " + tac[i].right_value.substring(1) );
} else {
emitMacro( "+_CALL_PROC_IMUL888_ " + tac[i].right_value );
}
break;
case "/":
if ( tac[i].right_addressing_mode == "imm" ) {
emitMacro( "+_IDIV888I_ " + tac[i].right_value.substring(1) );
} else {
emitMacro( "+_CALL_PROC_IDIV888_ " + tac[i].right_value );
}
break;
case "&":
emitAND( tac[i].right_value );
break;
case "|":
emitORA( tac[i].right_value );
break;
case "^":
emitEOR( tac[i].right_value );
break;
case "<<":
ThrowSyntaxErrorIfOperandIsNotImmediate( tac[i].right_addressing_mode, tac[i].right_value );
emitMacro( "+_SHL_ " + tac[i].right_value.substring(1) );
break;
case ">>":
ThrowSyntaxErrorIfOperandIsNotImmediate( tac[i].right_addressing_mode, tac[i].right_value );
emitMacro( "+_SHR_ " + tac[i].right_value.substring(1) );
break;
}
if ( tac[i].store_dest != false ) {
emitSTA( tac[i].dest_value );
}
opcode_nr++;
}
}