CPU: Store each jump inst in file with and without extension byte

vm/comp/cpu.c

@@ -663,9 +663,6 @@ cpu_step(void *_cpu_state) {
 	uint8_t eight_bit_src;
 	uint32_t four_byte_src;
 
-	/* Save old eip */
-	uint32_t eip_old = cpu_state->eip;
-
 	/* read the first byte from instruction pointer and increment ip
 	 * afterards */
 	op_code = cpu_read_byte_from_ram(cpu_state);
@@ -678,7 +675,16 @@ cpu_step(void *_cpu_state) {
 		
 		#include "cpu_cmpInst.c"
 
-		#include "cpu_JbInst.c"
+		#include "cpu_JumpInst.c"
+
+
+		case 0x0f: {
+			/* The opcode is two bytes long */
+			uint8_t op_code_2 = cpu_read_byte_from_ram(cpu_state);
+			switch(op_code_2){
+				#include "cpu_extInst.c"
+			}
+		}
 
 		default:
 			break;
@@ -686,6 +692,8 @@ cpu_step(void *_cpu_state) {
 	return false;
 }
 
+
+
 /** @brief nop - cpu does not support reading via bus
 */
 static bool

vm/comp/cpu_JbInst.c → vm/comp/cpu_JumpInst.c

@@ -5,21 +5,21 @@ case 0x72: {
 	int8_t offset = cpu_read_byte_from_ram(cpu_state);
 
 	if(cpu_get_carry_flag(cpu_state)){
-		cpu_set_eip(cpu_state, eip_old + offset);
+		cpu_set_eip(cpu_state, cpu_state->eip + offset);
 	}
 
 	return true;
 }
 
-case 0x82: {
-	/* JB rel32
-	 * Jump short if below (CF=1).
+
+case 0x75: {
+	/* JNE rel8
+	 * Jump short if not equal (ZF=0).
 	 */
-	int32_t offset = cpu_read_word_from_ram(cpu_state);
+	int8_t offset = cpu_read_byte_from_ram(cpu_state);
 
-	if(cpu_get_carry_flag(cpu_state)){
-		cpu_set_eip(cpu_state, eip_old + offset);
+	if(!cpu_get_zero_flag(cpu_state)){
+		cpu_set_eip(cpu_state, cpu_state->eip + offset);
 	}
-
 	return true;
 }

vm/comp/cpu_extInst.c

+case 0x82: {
+	/* JB rel32
+	 * Jump short if below (CF=1).
+	 */
+	int32_t offset = cpu_read_word_from_ram(cpu_state);
+
+	if(cpu_get_carry_flag(cpu_state)){
+		cpu_set_eip(cpu_state, cpu_state->eip + offset);
+	}
+
+	return true;
+}
+
+case 0x85: {
+	/* JNE rel32
+	 * Jump short if not equal (ZF=0).
+	 */
+	int32_t offset = cpu_read_word_from_ram(cpu_state);
+
+	if(!cpu_get_zero_flag(cpu_state)){
+		cpu_set_eip(cpu_state, cpu_state->eip + offset);
+	}
+	return true;
+}