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Changed stack.pointer->stack.ptr

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This commit is contained in:
Aryadev Chavali
2023-10-15 05:33:42 +01:00
parent 268fdf0ca0
commit da1c4aad35
1 changed files with 13 additions and 13 deletions
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26
src/main.c
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@@ -45,21 +45,21 @@ typedef struct
struct Stack struct Stack
{ {
byte data[VM_STACK_MAX]; byte data[VM_STACK_MAX];
word pointer; word ptr;
} stack; } stack;
} vm_t; } vm_t;
void vm_push_byte(vm_t *vm, data_t b) void vm_push_byte(vm_t *vm, data_t b)
{ {
if (vm->stack.pointer >= VM_STACK_MAX) if (vm->stack.ptr >= VM_STACK_MAX)
// TODO: Error STACK_OVERFLOW // TODO: Error STACK_OVERFLOW
return; return;
vm->stack.data[vm->stack.pointer++] = b.as_byte; vm->stack.data[vm->stack.ptr++] = b.as_byte;
} }
void vm_push_word(vm_t *vm, data_t w) void vm_push_word(vm_t *vm, data_t w)
{ {
if (vm->stack.pointer + WORD_SIZE >= VM_STACK_MAX) if (vm->stack.ptr + WORD_SIZE >= VM_STACK_MAX)
// TODO: Error STACK_OVERFLOW // TODO: Error STACK_OVERFLOW
return; return;
// By default store in big endian // By default store in big endian
@@ -74,26 +74,26 @@ void vm_push_word(vm_t *vm, data_t w)
void vm_push_float(vm_t *vm, data_t f) void vm_push_float(vm_t *vm, data_t f)
{ {
if (vm->stack.pointer + FLOAT_SIZE >= VM_STACK_MAX) if (vm->stack.ptr + FLOAT_SIZE >= VM_STACK_MAX)
// TODO: Error STACK_OVERFLOW // TODO: Error STACK_OVERFLOW
return; return;
// TODO: Make this machine independent (encode IEEE754 floats // TODO: Make this machine independent (encode IEEE754 floats
// yourself?) // yourself?)
memcpy(vm->stack.data + vm->stack.pointer, &f.as_float, FLOAT_SIZE); memcpy(vm->stack.data + vm->stack.ptr, &f.as_float, FLOAT_SIZE);
vm->stack.pointer += FLOAT_SIZE; vm->stack.ptr += FLOAT_SIZE;
} }
byte vm_pop_byte(vm_t *vm) byte vm_pop_byte(vm_t *vm)
{ {
if (vm->stack.pointer == 0) if (vm->stack.ptr == 0)
// TODO: Error STACK_UNDERFLOW // TODO: Error STACK_UNDERFLOW
return 0; return 0;
return vm->stack.data[--vm->stack.pointer]; return vm->stack.data[--vm->stack.ptr];
} }
word vm_pop_word(vm_t *vm) word vm_pop_word(vm_t *vm)
{ {
if (vm->stack.pointer < WORD_SIZE) if (vm->stack.ptr < WORD_SIZE)
// TODO: Error STACK_UNDERFLOW // TODO: Error STACK_UNDERFLOW
return 0; return 0;
word w = 0; word w = 0;
@@ -108,14 +108,14 @@ word vm_pop_word(vm_t *vm)
f64 vm_pop_float(vm_t *vm) f64 vm_pop_float(vm_t *vm)
{ {
if (vm->stack.pointer < FLOAT_SIZE) if (vm->stack.ptr < FLOAT_SIZE)
// TODO: Error STACK_UNDERFLOW // TODO: Error STACK_UNDERFLOW
return 0; return 0;
f64 f = 0; f64 f = 0;
// TODO: Make this machine independent (encode IEEE754 floats // TODO: Make this machine independent (encode IEEE754 floats
// yourself?) // yourself?)
memcpy(&f, vm->stack.data + vm->stack.pointer - FLOAT_SIZE, FLOAT_SIZE); memcpy(&f, vm->stack.data + vm->stack.ptr - FLOAT_SIZE, FLOAT_SIZE);
vm->stack.pointer -= FLOAT_SIZE; vm->stack.ptr -= FLOAT_SIZE;
return f; return f;
} }