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Store the result of OP_POP in the last register as a word

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Instead of making routines to handle data in the `ret` register, just
store the result of POP into the last word register.

This means we are no longer using vm_pop_* or POP_ROUTINES for the
vm_execute script on OP_POP: instead we'll just use vm_mov_* which
automatically pops the datum for us, while moving the datum to the
last register.
This commit is contained in:
Aryadev Chavali
2023-10-22 17:01:15 +01:00
parent 95723f36d2
commit 47c7d6baf7
3 changed files with 111 additions and 23 deletions
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14
src/runtime.h
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@@ -24,7 +24,9 @@ typedef struct
{
struct Registers
{
// Used for internal
word ret;
// General registers
word reg[VM_REGISTERS];
} registers;
struct Stack
@@ -50,12 +52,15 @@ void vm_load_stack(vm_t *, byte *, size_t);
void vm_load_program(vm_t *, inst_t *, size_t);
// Print routines
#define VM_PRINT_PROGRAM_EXCERPT 5
void vm_print_registers(vm_t *, FILE *);
void vm_print_stack(vm_t *, FILE *);
#define VM_PRINT_PROGRAM_EXCERPT 5
void vm_print_program(vm_t *, FILE *);
void vm_print_all(vm_t *, FILE *);
data_t vm_peek(vm_t *, data_type_t);
// Execution routines
void vm_push_byte(vm_t *, data_t);
void vm_push_hword(vm_t *, data_t);
void vm_push_word(vm_t *, data_t);
@@ -93,13 +98,6 @@ data_t vm_pop_byte(vm_t *);
data_t vm_pop_hword(vm_t *);
data_t vm_pop_word(vm_t *);
typedef data_t (*pop_f)(vm_t *);
static const pop_f POP_ROUTINES[] = {
[OP_POP_BYTE] = vm_pop_byte,
[OP_POP_HWORD] = vm_pop_hword,
[OP_POP_WORD] = vm_pop_word,
};
void vm_not_byte(vm_t *);
void vm_not_hword(vm_t *);
void vm_not_word(vm_t *);