diff options
| -rw-r--r-- | compiler.c | 82 |
1 files changed, 77 insertions, 5 deletions
@@ -910,6 +910,7 @@ void var_op_pure_set(CompData *out, Variable *store, Variable *from) { } } + // Specific setting rules for pointers void _var_op_set_ptr(CompData *out, Variable *store, Variable *from) { // Pointer coercion should always work @@ -989,6 +990,76 @@ void _var_op_set_ptr(CompData *out, Variable *store, Variable *from) { return; } +// Common func to move one variable to another in the case of two +// inbuilts +void _var_op_set_inbuilt(CompData *out, Variable *store, Variable *from) { + char *mov_from; + char *mov_to; + + // Cases for source/dest: + // register + // stack + // data + // reference + + // Cases for types + // uint - range from 1 to 8 bytes - zx expansion + // int - range from 1 to 8 bytes - sx expansion + // bool - always 1 byte + // float - not impl + // void - should only be used to represent ptrs, so we should not see it here. + + // In case of references + if (_var_ptr_type(store) == PTYPE_REF){ + vect_push_string(&out->text, "\tmov rdi, "); + vect_push_free_string(&out->text, _op_get_location(store)); + vect_push_string(&out->text, " ; pre-deref for inbuilt mov\n"); + + for(size_t i = store->ptr_chain.count - 1; i > 0; i--){ + int *cur = vect_get(&store->ptr_chain, i); + if (cur == PTYPE_REF) { + vect_push_string(&out->text, "\tmov rsi, [rsi] ; deref for mov\n"); + } else + break; // Should not happen + } + + mov_to = _gen_address(PREFIXES[_var_size(store) - 1], "rdi", "", 0, 0); + } else if (store->location == 0) { + mov_to = _gen_address(PREFIXES[_var_size(store) - 1], store->name, "", 0, 0); + } else if (store->location < 0) { + mov_to = _gen_address(PREFIXES[_var_size(store) - 1], "rsp", "", 0, -(store->location + 1)); + } else { + mov_to = _op_get_location(store); + } + + // TODO: Get mov_from for this func + + + // Match sign of data if required. + if (_var_size(from) < _var_size(store)) { + if(from->type->name[0] == 'i' && store->type->name[0] == 'i') { + if (_var_size(from) < 4) + vect_push_string(&out->text, "\tmovsx rsi, "); + else + vect_push_string(&out->text, "\tmovsxd rsi, "); + } else { + if(_var_size(from) < 4) + vect_push_string(&out->text, "\tmovzx rsi, "); + else + vect_push_string(&out->text, "\tmovzxd rsi, "); + } + vect_push_free_string(&out->text, mov_from); + vect_push_string(&out->text, " ; Sign extension for mov\n"); + mov_from = _op_get_register(5, _var_size(store)); + } + + vect_push_string(&out->text, "\tmov "); + vect_push_free_string(&out->text, mov_to); + vect_push_string(&out->text, ", "); + vect_push_free_string(&out->text, mov_from); + vect_push_string(&out->text, " ; Finish mov_inbuilt\n\n"); +} + // Tries it's best to coerce the data from "from" into a format // which will be accepted by "store", following refences in the process. // This is similar to a normal move operation. @@ -1003,12 +1074,9 @@ void var_op_set(CompData *out, Variable *store, Variable *from) { return; } - char *mov_from; - char *mov_to; - if(is_inbuilt(from->type->name)) { // Inbuilt types like int, uint, void, etc. - + _var_op_set_inbuilt(out, store, from); } else { // Two structs, we should only copy as much data as we can from one to another, // and so will defer to the storage variable for how much to transfer @@ -1127,7 +1195,11 @@ void var_op_sub(CompData *out, Variable *base, Variable *sub) { // Multiplies "base" by "mul" and sets "base" to the result. void var_op_mul(CompData *out, Variable *base, Variable *mul) { - + if(base->type->name[0] == 'i') { + // Integer multiplication + } else { + vect_push_string(&out->text, "\tmul "); + } } // Divides "base" by "div" and sets "base" to the result |