Revamped the opcode table, made the emulator more

efficient, and ported SuBEditor to C.

I revamped the opcode table to add another prefix bit
for the addressing mode, finally giving access to all
addresses, without wasting any bytes.

I made the stack based operations more efficient, by
sort of applying Duff's device to it.

And I ported SuBEditor to C, to make it easier for me
to figure out how to implement SuBAsm.

1 files changed, 33 insertions, 0 deletions

diff --git a/programs/c-ports/subasm.c b/programs/c-ports/subasm.c
new file mode 100644
index 0000000..a996e3a
--- /dev/null
+++ b/programs/c-ports/subasm.c
@@ -0,0 +1,33 @@
+#include "subeditor.h"
+int16_t str_cmp(const char *s0, uint16_t i, const char *s1, uint16_t j) {
+	for (; s0[i] == s1[j]; i++, j++);
+	return i-j;
+}
+
+void tokenize(char *str) {
+	uint16_t i = 0;
+	uint16_t skip = 0;
+	uint8_t done = 0;
+	while (!done) {
+		if (!cmd_buf[i]) {
+			done = 1;
+		} else {
+			switch (cmd_buf[i]) {
+				case '.':
+					if (skip = str_cmp(cmd_buf, i+1, "org", 0) > 0) {
+						f = TOK_ORG;
+						i += skip;
+					} else if (skip = str_cmp(cmd_buf, i+1, "byte", 0) > 0) {
+						f = TOK_BYTE;
+						i+=skip;
+					}
+					break;
+			}
+		}
+	}
+}
+
+void subasm() {
+	uint64_t address = 0;
+	tokenize(cmd_buf);
+}