umx

commit 05ba1a534e7081c3aaed75570bf6715175db2108
parent 6bd8a1b98acaa0f692e80a8758cc8b44772ac1b2
Author: bsandro <brian.drosan@gmail.com>
Date:   Sun,  9 Jan 2022 23:15:08 +0200

basic opcodes

Diffstat:
M
main.c
 | 
27
++++++++++++++++++++++++---

1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/main.c b/main.c
@@ -83,7 +83,7 @@ int main(void)
 			instruction.reg_b = (platter & 56) >> 3;  // mask 000 111 000 = 56
 			instruction.reg_c = platter & 7;          // mask 000 000 111 = 7
 		}
-		print_instruction(instruction);
+		//print_instruction(instruction);
 		exec_instruction(&state, instruction);
 		finger++;
 		if (finger >= state.arena.arrays[0].size / PLATTER_SIZE) {
@@ -113,8 +113,29 @@ void print_instruction(struct instruction_t instruction) {
 }
 
 void exec_instruction(struct state_t *state, struct instruction_t in) {
-	(void)state;
-	(void)in;
+	switch (in.opcode) {
+	case CMOV:
+		if (state->registers[in.reg_c] != 0) state->registers[in.reg_a] = state->registers[in.reg_b];
+		break;
+	case ARRI:
+		state->registers[in.reg_a] = state->arena.arrays[state->registers[in.reg_b]].data[state->registers[in.reg_c]];
+		break;
+	case ARRA:
+		state->arena.arrays[in.reg_a].data[state->registers[in.reg_b]] = state->registers[in.reg_c];
+		break;
+	case ADD:
+		state->registers[in.reg_a] = state->registers[in.reg_b] + state->registers[in.reg_c]; //@todo: modulo 2^32 ?
+		break;
+	case MUL:
+		state->registers[in.reg_a] = state->registers[in.reg_b] * state->registers[in.reg_c]; //@todo: modulo 2^32 ?
+		break;
+	case DIV:
+		state->registers[in.reg_a] = state->registers[in.reg_b] / state->registers[in.reg_c]; //@todo: modulo 2^32 ?
+		break;
+	case NOTA:
+		state->registers[in.reg_a] = ~(state->registers[in.reg_b] & state->registers[in.reg_c]);
+		break;
+	}
 }
 
 uint32_t array_add(struct arena_t *arena, uint32_t size) {