diff options
Diffstat (limited to 'compiler.c')
| -rw-r--r-- | compiler.c | 63 |
1 files changed, 60 insertions, 3 deletions
@@ -754,7 +754,7 @@ char *_op_get_location(Variable *var) { out = int_to_str(var->offset); } else if(var->location == LOC_STCK) { // Invert because stack grows down (and stack index starts at 1) - out = _gen_address("", "rsp", "", 0, var->offset, false); + out = _gen_address("", "rbp", "", 0, -var->offset, false); } else if (var->location == LOC_DATA) { // Stored in data sec char *name = _var_get_datalabel(var); @@ -1097,7 +1097,7 @@ char *_var_get_store(CompData *out, Variable *store) { return _gen_address(PREFIXES[_var_size(store) - 1], name, "", 0, 0, true); free(name); } else if (store->location < 0) { - return _gen_address(PREFIXES[_var_size(store) - 1], "rsp", "", 0, -(store->location + 1), false); + return _gen_address(PREFIXES[_var_size(store) - 1], "rbp", "", 0, -store->offset, false); } else { return _op_get_location(store); } @@ -1155,7 +1155,7 @@ char *_var_get_from(CompData *out, Variable *store, Variable *from) { free(name); } else { // from on stack - mov_from = _gen_address(PREFIXES[_var_size(from) - 1], "rsp", "", 0, -(from->location + 1), false); + mov_from = _gen_address(PREFIXES[_var_size(from) - 1], "rbp", "", 0, -from->offset, false); } // Match sign of data if required. @@ -3494,6 +3494,63 @@ Scope scope_subscope(Scope *s, char *name) { // Scope variable creation and management +int _scope_next_stack_loc(Scope *s) { + int sum = 0; + + if (s->parent != NULL) + sum += _scope_next_stack_loc(s->parent); + else + sum += 56; + + for (size_t i = 0; i < s->stack_vars.count; i++) { + Variable *v = vect_get(&s->stack_vars, i); + if (_var_ptr_type(v) > 1) { + // TODO: Multi dimensional arrays + sum += 8; + sum += v->type->size * _var_ptr_type(v); + } else { + sum += _var_pure_size(v); + } + } + + return sum; +} + +// Tmp reg masks +#define RMSK_B 0b001 +#define RMSK_8 0b010 +#define RMSK_9 0b100 + +// Main reg masks +#define RMSK_10 0b000001000 +#define RMSK_11 0b000010000 +#define RMSK_12 0b000100000 +#define RMSK_13 0b001000000 +#define RMSK_14 0b010000000 +#define RMSK_15 0b100000000 + +int _scope_avail_reg(Scope *s) { + int mask = 0b111111111; + if (s->parent != NULL) { + mask = _scope_avail_reg(s->parent); + } + + for (size_t i = 0; i < s->reg_vars.count; i++) { + Variable *v = vect_get(&s->reg_vars, i); + int vmask = 0; + + if (v->location == 2) { + vmask = RMSK_B; + } else if (v->location > 8) { + vmask = 0b1 << (v->location - 8); + } + + mask = mask & !(vmask); + } + + return mask; +} + // Creates a new tmp variable from an existing variable Variable scope_mk_tmp(Variable *v) { return *v; |