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Implement OP_MULT in runtime

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Lucky surprise: OP_PLUS follows the same principle rules as the
bitwise operators in that they return the same type as the input.
Therefore I can simply use the same macro to implement it and MULT as
those.  Very nice.
This commit is contained in:
Aryadev Chavali
2023-11-01 18:10:43 +00:00
parent 83678ad29a
commit 848c2f75e3
2 changed files with 28 additions and 48 deletions
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69
vm/runtime.c
View File

@@ -56,7 +56,7 @@ const char *err_as_cstr(err_t err)
err_t vm_execute(vm_t *vm)
{
static_assert(NUMBER_OF_OPCODES == 70, "vm_execute: Out of date");
static_assert(NUMBER_OF_OPCODES == 73, "vm_execute: Out of date");
struct Program *prog = &vm->program;
if (prog->ptr >= prog->max)
return ERR_END_OF_PROGRAM;
@@ -108,7 +108,8 @@ err_t vm_execute(vm_t *vm)
OPCODE_IS_TYPE(instruction.opcode, OP_LTE) ||
OPCODE_IS_TYPE(instruction.opcode, OP_GT) ||
OPCODE_IS_TYPE(instruction.opcode, OP_GTE) ||
OPCODE_IS_TYPE(instruction.opcode, OP_PLUS))
OPCODE_IS_TYPE(instruction.opcode, OP_PLUS) ||
OPCODE_IS_TYPE(instruction.opcode, OP_MULT))
{
prog->ptr++;
return STACK_ROUTINES[instruction.opcode](vm);
@@ -632,7 +633,7 @@ VM_NOT_TYPE(byte, BYTE)
VM_NOT_TYPE(hword, HWORD)
VM_NOT_TYPE(word, WORD)
#define VM_BITWISE_TYPE(COMPNAME, COMP, TYPEL, TYPEU) \
#define VM_SAME_TYPE(COMPNAME, COMP, TYPEL, TYPEU) \
err_t vm_##COMPNAME##_##TYPEL(vm_t *vm) \
{ \
data_t a = {0}, b = {0}; \
@@ -658,15 +659,23 @@ VM_NOT_TYPE(word, WORD)
return vm_push_byte(vm, DBYTE(b.as_##GETL COMP a.as_##GETL)); \
}
VM_BITWISE_TYPE(or, |, byte, BYTE)
VM_BITWISE_TYPE(or, |, hword, HWORD)
VM_BITWISE_TYPE(or, |, word, WORD)
VM_BITWISE_TYPE(and, &, byte, BYTE)
VM_BITWISE_TYPE(and, &, hword, HWORD)
VM_BITWISE_TYPE(and, &, word, WORD)
VM_BITWISE_TYPE(xor, ^, byte, BYTE)
VM_BITWISE_TYPE(xor, ^, hword, HWORD)
VM_BITWISE_TYPE(xor, ^, word, WORD)
VM_SAME_TYPE(or, |, byte, BYTE)
VM_SAME_TYPE(or, |, hword, HWORD)
VM_SAME_TYPE(or, |, word, WORD)
VM_SAME_TYPE(and, &, byte, BYTE)
VM_SAME_TYPE(and, &, hword, HWORD)
VM_SAME_TYPE(and, &, word, WORD)
VM_SAME_TYPE(xor, ^, byte, BYTE)
VM_SAME_TYPE(xor, ^, hword, HWORD)
VM_SAME_TYPE(xor, ^, word, WORD)
VM_SAME_TYPE(plus, +, byte, BYTE)
VM_SAME_TYPE(plus, +, hword, HWORD)
VM_SAME_TYPE(plus, +, word, WORD)
VM_SAME_TYPE(mult, *, byte, BYTE)
VM_SAME_TYPE(mult, *, hword, HWORD)
VM_SAME_TYPE(mult, *, word, WORD)
VM_COMPARATOR_TYPE(eq, ==, byte, byte)
VM_COMPARATOR_TYPE(eq, ==, byte, char)
@@ -702,39 +711,3 @@ VM_COMPARATOR_TYPE(gte, >=, hword, hword)
VM_COMPARATOR_TYPE(gte, >=, hword, int)
VM_COMPARATOR_TYPE(gte, >=, word, word)
VM_COMPARATOR_TYPE(gte, >=, word, long)
err_t vm_plus_byte(vm_t *vm)
{
data_t a = {0}, b = {0};
err_t err = vm_pop_byte(vm, &a);
if (err)
return err;
err = vm_pop_byte(vm, &b);
if (err)
return err;
return vm_push_byte(vm, DBYTE(a.as_byte + b.as_byte));
}
err_t vm_plus_hword(vm_t *vm)
{
data_t a = {0}, b = {0};
err_t err = vm_pop_hword(vm, &a);
if (err)
return err;
err = vm_pop_hword(vm, &b);
if (err)
return err;
return vm_push_hword(vm, DHWORD(a.as_hword + b.as_hword));
}
err_t vm_plus_word(vm_t *vm)
{
data_t a = {0}, b = {0};
err_t err = vm_pop_word(vm, &a);
if (err)
return err;
err = vm_pop_word(vm, &b);
if (err)
return err;
return vm_push_word(vm, DWORD(a.as_word + b.as_word));
}

7
vm/runtime.h
View File

@@ -169,6 +169,10 @@ err_t vm_plus_byte(vm_t *);
err_t vm_plus_hword(vm_t *);
err_t vm_plus_word(vm_t *);
err_t vm_mult_byte(vm_t *);
err_t vm_mult_hword(vm_t *);
err_t vm_mult_word(vm_t *);
typedef err_t (*stack_f)(vm_t *);
static const stack_f STACK_ROUTINES[] = {
[OP_NOT_BYTE] = vm_not_byte, [OP_NOT_HWORD] = vm_not_hword,
@@ -204,6 +208,9 @@ static const stack_f STACK_ROUTINES[] = {
[OP_PLUS_BYTE] = vm_plus_byte, [OP_PLUS_HWORD] = vm_plus_hword,
[OP_PLUS_WORD] = vm_plus_word,
[OP_MULT_BYTE] = vm_mult_byte, [OP_MULT_HWORD] = vm_mult_hword,
[OP_MULT_WORD] = vm_mult_word,
};
#endif