Add 6502 DEX and DEY instructions

src/6502.c

@@ -33,6 +33,15 @@ void iny(FILE *outfile) {
   fwrite(INY, 1, 1, outfile);
 }
 
+void dex(FILE *outfile) {
+  fwrite(DEX, 1, 1, outfile);
+}
+
+void dey(FILE *outfile) {
+  fwrite(DEY, 1, 1, outfile);
+}
+
+
 void nop(FILE *outfile) {
   fwrite(NOP, 1, 1, outfile);
 }

src/6502.h

@@ -10,6 +10,8 @@
 
 #define INX "\xE8"
 #define INY "\xC8"
+#define DEX "\xCA"
+#define DEY "\x88"
 
 #define NOP "\xEA"
 
@@ -22,6 +24,8 @@ void tya(FILE *outfile);
 
 void inx(FILE *outfile);
 void iny(FILE *outfile);
+void dex(FILE *outfile);
+void dey(FILE *outfile);
 
 void nop(FILE *outfile);
 

src/main.c

@@ -39,6 +39,10 @@ void parser(char lexed_buf[512][128][128], FILE *outfile) { // outfile is needed
 			  inx(outfile);
 			} else if (!strcmp(lexed_buf[i][j], "INY")) {
 			  iny(outfile);
+			} else if (!strcmp(lexed_buf[i][j], "DEX")) {
+			  dex(outfile);
+			} else if (!strcmp(lexed_buf[i][j], "DEY")) {
+			  dey(outfile);
 			} else if (!strcmp(lexed_buf[i][j], "TAX")) {
 			  tax(outfile);
 			} else if (!strcmp(lexed_buf[i][j], "TAY")) {

tests/test.asm

@@ -1,14 +1,9 @@
 INY
 INY
-INX
-TXA
 INY
-TAX
-INX
-INX
-TAY
+DEY
 INX
 INX
 INX
-INY
-INY
+DEX
+DEX

tests/test.bin

@@ -1 +1 @@
-ИИиЉИЄииЁиииИИ
+ИИИ€иииКК