From d2cdb211b2d15c3a15b15737645f2a68641f34ee Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Sat, 21 Oct 2023 23:31:48 +0100
Subject: Added vm_execute_all which executes an entire program

Handles OP_HALT
---
 src/main.c    |  8 +-------
 src/runtime.c | 11 +++++++++++
 src/runtime.h |  1 +
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/src/main.c b/src/main.c
index 5298876..c99ffb8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -28,13 +28,7 @@ int interpret_bytecode(const char *filepath)
   vm_t vm = {0};
   vm_load_stack(&vm, stack, ARR_SIZE(stack));
   vm_load_program(&vm, instructions, number);
-  for (size_t i = 0; i < number; ++i)
-  {
-    vm_execute(&vm);
-    printf("Cycle %lu\n", i);
-    vm_print_all(&vm, stdout);
-    printf("\n");
-  }
+  vm_execute_all(&vm);
   free(instructions);
   return 0;
 }
diff --git a/src/runtime.c b/src/runtime.c
index 218bba7..57101e0 100644
--- a/src/runtime.c
+++ b/src/runtime.c
@@ -50,6 +50,10 @@ void vm_execute(vm_t *vm)
     vm->registers.ret = d.as_word; // will do type punning for me
     prog->ptr++;
   }
+  else if (instruction.opcode == OP_HALT)
+  {
+    // Do nothing here.  Should be caught by callers of vm_execute
+  }
   else
   {
     // TODO: Error (Unknown opcode)
@@ -57,6 +61,13 @@ void vm_execute(vm_t *vm)
   }
 }
 
+void vm_execute_all(vm_t *vm)
+{
+  struct Program *program = &vm->program;
+  while (program->instructions[program->ptr].opcode != OP_HALT)
+    vm_execute(vm);
+}
+
 void vm_load_stack(vm_t *vm, byte *bytes, size_t size)
 {
   vm->stack.data = bytes;
diff --git a/src/runtime.h b/src/runtime.h
index e588541..8ff0142 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -44,6 +44,7 @@ typedef struct
 #define VM_REG_WORD(REG)  ((REG))
 
 void vm_execute(vm_t *);
+void vm_execute_all(vm_t *);
 
 void vm_load_stack(vm_t *, byte *, size_t);
 void vm_load_program(vm_t *, inst_t *, size_t);
-- 
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