75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
// Copyright 2021 Bradley D. Nelson
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#define NEXT goto next
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#define JMPW goto work
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#define ADDROF(x) ((void *) OP_ ## x)
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enum {
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#define Z(flags, name, op, code) OP_ ## op,
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PLATFORM_OPCODE_LIST
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TIER2_OPCODE_LIST
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TIER1_OPCODE_LIST
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TIER0_OPCODE_LIST
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#undef Z
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};
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static cell_t *forth_run(cell_t *init_rp) {
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static const BUILTIN_WORD builtins[] = {
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#define Z(flags, name, op, code) \
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name, ((VOC_ ## flags >> 8) & 0xff) | BUILTIN_MARK, sizeof(name) - 1, \
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(VOC_ ## flags & 0xff), (void *) OP_ ## op,
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PLATFORM_OPCODE_LIST
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TIER2_OPCODE_LIST
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TIER1_OPCODE_LIST
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TIER0_OPCODE_LIST
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#undef Z
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0, 0, 0,
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};
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if (!init_rp) {
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g_sys->DOCREATE_OP = ADDROF(DOCREATE);
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g_sys->builtins = builtins;
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return 0;
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}
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register cell_t *ip, *rp, *sp, tos, w;
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register float *fp, ft;
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rp = init_rp; UNPARK;
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for (;;) {
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__try {
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for (;;) {
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next:
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w = *ip++;
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work:
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switch (*(cell_t *) w & 0xff) {
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#define Z(flags, name, op, code) case OP_ ## op: { code; } NEXT;
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PLATFORM_OPCODE_LIST
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TIER2_OPCODE_LIST
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TIER1_OPCODE_LIST
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TIER0_OPCODE_LIST
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#undef Z
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}
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}
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} __except (1) {
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rp = *g_sys->throw_handler;
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*g_sys->throw_handler = (cell_t *) *rp--;
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sp = (cell_t *) *rp--;
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fp = (float *) *rp--;
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ip = (cell_t *) *rp--;
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--sp;
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tos = GetExceptionCode();
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}
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}
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}
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