82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/**************************************************************
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_ __ _ _
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_ __ ___| |_ _ __ ___ / _| ___ _ __| |_| |__
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| '__/ _ \ __| '__/ _ \| |_ / _ \| '__| __| '_ \
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| | | __/ |_| | | (_) | _| (_) | | | |_| | | |
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|_| \___|\__|_| \___/|_| \___/|_| \__|_| |_|
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for nga
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(c) Charles Childers, Luke Parrish, Marc Simpsonn,
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Jay Skeer, Kenneth Keating
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**************************************************************/
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/* Multi Core Support ------------------------------------------------ */
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#ifdef ENABLE_MULTICORE
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void init_core(NgaState *vm, CELL x) {
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int y;
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vm->cpu[x].sp = 0;
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vm->cpu[x].rp = 0;
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vm->cpu[x].ip = 0;
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vm->cpu[x].active = 0;
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vm->cpu[x].u = 0;
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for (y = 0; y < STACK_DEPTH; y++) { vm->cpu[x].data[y] = 0; };
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for (y = 0; y < ADDRESSES; y++) { vm->cpu[x].address[y] = 0; };
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for (y = 0; y < 24; y++) { vm->cpu[x].registers[y] = 0; };
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}
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void start_core(NgaState *vm, CELL x, CELL ip) {
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vm->cpu[x].ip = ip;
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vm->cpu[x].rp = 1;
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vm->cpu[x].active = -1;
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}
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void pause_core(NgaState *vm, CELL x) {
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vm->cpu[x].active = 0;
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}
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void resume_core(NgaState *vm, CELL x) {
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vm->cpu[x].active = -1;
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}
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void switch_core(NgaState *vm) {
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vm->active += 1;
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if (vm->active >= CORES) { vm->active = 0; }
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if (!vm->cpu[vm->active].active) { switch_core(vm); }
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}
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void io_multicore(NgaState *vm) {
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int x, y, z;
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x = stack_pop(vm);
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switch(x) {
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case 0: y = stack_pop(vm);
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init_core(vm, y);
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break;
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case 1: y = stack_pop(vm);
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z = stack_pop(vm);
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start_core(vm, y, z);
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break;
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case 2: y = stack_pop(vm);
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pause_core(vm, y);
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break;
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case 3: pause_core(vm, vm->active);
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break;
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case 4: y = stack_pop(vm);
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resume_core(vm, y);
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break;
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case 5: y = stack_pop(vm);
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stack_push(vm, vm->cpu[vm->active].registers[y]);
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break;
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case 6: y = stack_pop(vm);
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z = stack_pop(vm);
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vm->cpu[vm->active].registers[y] = z;
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break;
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}
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}
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void query_multicore(NgaState *vm) {
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stack_push(vm, 0);
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stack_push(vm, 8000); /* device type 8000 */
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}
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#endif
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