// Copyright 2021 Bradley D. Nelson
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#define JMPW goto **(void **) w
#define NEXT w = *ip++; JMPW
#define ADDR_DOCOLON && OP_DOCOLON
#define ADDR_DOCREATE && OP_DOCREATE
#define ADDR_DODOES && OP_DODOES

static cell_t *forth_run(cell_t *init_rp) {
  if (!init_rp) {
#define X(name, op, code) create(name, sizeof(name) - 1, name[0] == ';', && OP_ ## op);
    PLATFORM_OPCODE_LIST
    OPCODE_LIST
#undef X
    return 0;
  }
  register cell_t *ip, *rp, *sp, tos, w;
  register float *fp;
  rp = init_rp; UNPARK; NEXT;
#define X(name, op, code) OP_ ## op: { code; } NEXT;
  PLATFORM_OPCODE_LIST
  OPCODE_LIST
#undef X
  OP_DOCOLON: ++rp; *rp = (cell_t) ip; ip = (cell_t *) (w + sizeof(cell_t)); NEXT;
  OP_DOCREATE: DUP; tos = w + sizeof(cell_t) * 2; NEXT;
  OP_DODOES: DUP; tos = w + sizeof(cell_t) * 2;
             ++rp; *rp = (cell_t) ip; ip = (cell_t *) *(cell_t *) (w + sizeof(cell_t)); NEXT;
}