Added support for resolving fixup labels.

AKA, referencing a label before it has been declared
yet.

1 files changed, 6 insertions, 3 deletions

diff --git a/opcode.h b/opcode.h
index ae637d4..990df5a 100644
--- a/opcode.h
+++ b/opcode.h
@@ -29,6 +29,7 @@
 #define ANX 0x24 /* bitwise ANd with X register. */
 #define AAX 0x25 /* bitwise And with Accumulator, and X register. */
 #define STT 0x28 /* STart Threads. */
+#define TSX 0x2E /* Transfer Stack pointer to X. */
 #define BPO 0x30 /* Branch if POsitive. */
 #define ORA 0x31 /* bitwise OR with Accumulator. */
 #define ORY 0x32 /* bitwise OR with Y register. */
@@ -36,6 +37,7 @@
 #define ORX 0x34 /* bitwise OR with X register. */
 #define OAX 0x35 /* bitwise Or with Accumulator, and X register. */
 #define SEI 0x38 /* SEt Interupt flag. */
+#define TXS 0x3E /* Transfer X to Stack pointer. */
 #define BNG 0x40 /* Branch if NeGative. */
 #define XOR 0x41 /* bitwise XOR with accumulator. */
 #define XRY 0x42 /* bitwise XoR with Y register. */
@@ -97,8 +99,6 @@
 #define V ((uint64_t)1 << 6)
 #define N ((uint64_t)1 << 7)
 
-#define STK_STADDR 0x010000 /* Starting address of the stack. */
-
 struct sux;
 
 uint8_t *addr; /* Address Space. */
@@ -108,7 +108,8 @@ struct sux {
 	uint64_t ps; /* The processor status register. */
 	uint64_t a[8], y[8], x[8]; /* Registers A, X, and Y. */
 	uint64_t pc[8]; /* Program counter. */
-	uint16_t sp; /* Stack pointer. */
+	uint16_t sp[8]; /* Stack pointer. */
+	uint16_t stk_st[8]; /* Starting address of each threads stack. */
 	uint8_t crt; /* Current running threads. */
 	uint8_t c[8], z[8], i[8], s[8], v[8], n[8]; /* Processor Status Flags. */
 
@@ -154,6 +155,7 @@ static const char *opname[0x100] = {
 	[ANX] = "ANX #",
 	OPNAME(AAX),
 	OPNAME(STT),
+	OPNAME(TSX),
 	[0x29] = "AND a",
 	[0x2B] = "AND zm",
 	OPNAME(BPO),
@@ -163,6 +165,7 @@ static const char *opname[0x100] = {
 	[ORX] = "ORX #",
 	OPNAME(OAX),
 	OPNAME(SEI),
+	OPNAME(TXS),
 	[0x39] = "ORA a",
 	[0x3B] = "ORA zm",
 	OPNAME(BNG),