diff src/insn_rlist.c @ 28:c0ff62e5ad39

Added register list mode handler
author lost
date Fri, 02 Jan 2009 03:17:26 +0000
parents
children 9bd0fbfe7405
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line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/insn_rlist.c	Fri Jan 02 03:17:26 2009 +0000
@@ -0,0 +1,62 @@
+/*
+insn_rlist.c
+Copyright © 2009 William Astle
+
+This file is part of LWASM.
+
+LWASM is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+for handling inherent mode instructions
+*/
+
+#define __insn_inh_c_seen__
+
+#include "lwasm.h"
+#include "instab.h"
+
+OPFUNC(insn_rlist)
+{
+	int rb = 0;
+	int rn;
+	static const char *regs = "CCA B DPX Y U PCD S ";
+
+	lwasm_emitop(as, l, instab[opnum].ops[0]);
+	while (**p && !isspace(**p))
+	{
+		rn = lwasm_lookupreg2(regs, p);
+		if (rn < 0)
+		{
+			register_error(as, l, 1, "Bad register '%s'", *p);
+			lwasm_emit(as, l, 0);
+			return;
+		}
+		if (**p && **p != ',' && !isspace(**p))
+		{
+			register_error(as, l, 1, "Bad operand");
+			lwasm_emit(as, l, 0);
+		}
+		if (**p == ',')
+			(*p)++;
+		if (rn == 8)
+			rn = 6;
+		else if (rn == 9)
+			rn = 0x40;
+		else
+			rn = 1 << rn;
+		rb |= rn;
+	}
+	lwasm_emit(as, l, rb);
+}