1 files changed, 9 insertions, 5 deletions
diff --git a/cpu_opcodes.c b/cpu_opcodes.c
index b879015..7e174be 100644
--- a/cpu_opcodes.c
+++ b/cpu_opcodes.c
@@ -1,7 +1,7 @@
 
 
 // ADC
-
+__attribute__((always_inline, hot))
 static inline void adc(struct cpu_state * restrict cpu, uint8_t value) {
 #ifdef ENABLE_DECIMAL_MODE
 	if(cpu->d) {
@@ -407,7 +407,7 @@ static void opcode_brk(struct nes_state * restrict state) {
 
 
 // BRANCHES
-
+__attribute__((always_inline, hot))
 static inline int page_crossed(uint16_t a, uint16_t b) {
 	return (a & 0xff00) != (b & 0xff00);
 }
@@ -583,6 +583,7 @@ static void opcode_sei(struct nes_state * restrict state) {
 
 
 // CMP
+__attribute__((always_inline, hot))
 static inline void cmp(struct cpu_state * restrict cpu, uint8_t value) {
 	uint8_t result = cpu->a - value;
 	cpu->c = (cpu->a >= value);
@@ -695,7 +696,7 @@ static void opcode_cmp_absx(struct nes_state * restrict state) {
 
 
 // CPX
-
+__attribute__((always_inline, hot))
 static inline void cpx(struct cpu_state * restrict cpu, uint8_t value) {
 	uint8_t result = cpu->x - value;
 	cpu->c = (cpu->x >= value);
@@ -731,7 +732,7 @@ static void opcode_cpx_abs(struct nes_state * restrict state) {
 
 
 // CPY
-
+__attribute__((always_inline, hot))
 static inline void cpy(struct cpu_state * restrict cpu, uint8_t value) {
 	uint8_t result = cpu->y - value;
 	cpu->c = (cpu->y >= value);
@@ -1752,7 +1753,7 @@ static void opcode_ror_absx(struct nes_state * restrict state) {
 
 
 // SBC
-
+__attribute__((always_inline, hot))
 static inline void sbc(struct cpu_state * restrict cpu, uint8_t value) {
 #ifdef ENABLE_DECIMAL_MODE
 	if(cpu->d) {
@@ -2123,6 +2124,9 @@ static void opcode_sty_zpx(struct nes_state * restrict state) {
 
 __attribute__((noinline))
 static void init_opcode_lut(void) {
+	for(uint32_t i = 0; i < 256; ++i) {
+		opcode_lut[i] = opcode_nop;		// make sure erroneous opcodes just do "NOP", this might change in the future!
+	}
 	opcode_lut[0x00] = opcode_brk;
 	opcode_lut[0x01] = opcode_ora_indx;
 	opcode_lut[0x05] = opcode_ora_zp;