# HG changeset patch
# User lost@starbug
# Date 1270089479 21600
# Node ID be0f9f8d799f06abfee683cb5de6ddb5574d730d
# Parent 0cf4948d53b47ce741bdc2d00fc63d17c0b8d056
Bit transfer ops added
diff -r 0cf4948d53b4 -r be0f9f8d799f lwasm/Makefile.am
--- a/lwasm/Makefile.am Wed Mar 31 20:12:20 2010 -0600
+++ b/lwasm/Makefile.am Wed Mar 31 20:37:59 2010 -0600
@@ -3,6 +3,7 @@
lwasm_SOURCES = main.c pragma.c input.c pass1.c lwasm.c \
instab.c symbol.c macro.c \
insn_inh.c insn_rtor.c insn_tfm.c insn_rlist.c insn_rel.c \
+ insn_bitbit.c \
pseudo.c section.c os9.c
lwasm_LDADD = -L$(top_builddir)/lib -L$(top_srcdir)/lib -L$(top_builddir)/lwlib -L$(top_srcdir)/lwlib -lgnu -llw
EXTRA_DIST = lwasm.h input.h instab.h
diff -r 0cf4948d53b4 -r be0f9f8d799f lwasm/insn_bitbit.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lwasm/insn_bitbit.c Wed Mar 31 20:37:59 2010 -0600
@@ -0,0 +1,147 @@
+/*
+insn_bitbit.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 .
+*/
+
+#include
+#include
+
+#include
+
+#include "lwasm.h"
+#include "instab.h"
+
+// these instructions cannot tolerate external references
+PARSEFUNC(insn_parse_bitbit)
+{
+ int r;
+ lw_expr_t e;
+ int v1;
+ int tv;
+
+ r = toupper(*(*p)++);
+ if (r == 'A')
+ r = 1;
+ else if (r == 'B')
+ r = 2;
+ else if (r == 'C' && toupper(**p) == 'C')
+ {
+ r = 0;
+ (*p)++;
+ }
+ else
+ {
+ lwasm_register_error(as, l, "Bad register");
+ return;
+ }
+
+ if (*(*p)++ != ',')
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+ e = lwasm_parse_expr(as, p);
+ if (!e)
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+ lwasm_save_expr(l, 0, e);
+ if (*(*p)++ != ',')
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+
+ e = lwasm_parse_expr(as, p);
+ if (!e)
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+ lwasm_save_expr(l, 1, e);
+
+ if (*(*p)++ != ',')
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+
+ // ignore base page address modifier
+ if (**p == '<')
+ (*p)++;
+
+ e = lwasm_parse_expr(as, p);
+ if (!e)
+ {
+ lwasm_register_error(as, l, "Bad operand");
+ return;
+ }
+ lwasm_save_expr(l, 2, e);
+
+ l -> lint = r;
+ l -> len = OPLEN(instab[l -> insn].ops[0]) + 2;
+}
+
+EMITFUNC(insn_emit_bitbit)
+{
+ int v1, v2;
+ lw_expr_t e;
+
+ e = lwasm_fetch_expr(l, 0);
+ if (!lw_expr_istype(e, lw_expr_type_int))
+ {
+ lwasm_register_error(as, l, "Bit number must be fully resolved");
+ return;
+ }
+ v1 = lw_expr_intval(e);
+ if (v1 < 0 || v1 > 7)
+ {
+ lwasm_register_error(as, l, "Invalid bit number");
+ v1 = 0;
+ }
+
+ e = lwasm_fetch_expr(l, 1);
+ if (!lw_expr_istype(e, lw_expr_type_int))
+ {
+ lwasm_register_error(as, l, "Bit number must be fully resolved");
+ return;
+ }
+ v2 = lw_expr_intval(e);
+ if (v2 < 0 || v2 > 7)
+ {
+ lwasm_register_error(as, l, "Invalid bit number");
+ v2 = 0;
+ }
+ l -> pb = (l -> lint << 6) | (v1 << 3) | v2;
+
+ e = lwasm_fetch_expr(l, 2);
+ if (lw_expr_istype(e, lw_expr_type_int))
+ {
+ v1 = lw_expr_intval(e) & 0xFFFF;
+ v2 = v1 - ((l -> dpval) << 8);
+ if (v2 > 0xFF || v2 < 0)
+ {
+ lwasm_register_error(as, l, "Byte overflow");
+ return;
+ }
+ }
+ lwasm_emitop(l, instab[l -> insn].ops[0]);
+ lwasm_emit(l, l -> pb);
+ lwasm_emitexpr(l, e, 1);
+}