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Add UVM32_SYSCALL_RAND to get a "true" random number from the host, as I want to play zigtris and not have it be the same every time.

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This commit is contained in:
Toby Jaffey 2025-12-17 20:19:31 +00:00
parent 3d83844d5c
commit d780c4e69d
6 changed files with 18 additions and 1 deletions
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5
hosts/host-sdl/host-sdl.c
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@ -241,6 +241,8 @@ int main(int argc, char *argv[]) {
return 1;
}
srand(clock());
uvm32_init(vmst);
if (!uvm32_load(vmst, rom, romlen)) {
@ -374,6 +376,9 @@ int main(int argc, char *argv[]) {
case UVM32_SYSCALL_MILLIS: {
uvm32_arg_setval(vmst, &evt, RET, SDL_GetTicks());
} break;
case UVM32_SYSCALL_RAND:
uvm32_arg_setval(&vmst, &evt, RET, rand());
break;
case UVM32_SYSCALL_GETC: {
uvm32_arg_setval(vmst, &evt, RET, 0xFFFFFFFF);
} break;

5
hosts/host/host.c
View file

@ -190,6 +190,8 @@ int main(int argc, char *argv[]) {
return 1;
}
srand(clock());
uvm32_init(&vmst);
if (!uvm32_load(&vmst, rom, romlen)) {
@ -264,6 +266,9 @@ int main(int argc, char *argv[]) {
case UVM32_SYSCALL_PRINTHEX:
printf("%08x", uvm32_arg_getval(&vmst, &evt, ARG0));
break;
case UVM32_SYSCALL_RAND:
uvm32_arg_setval(&vmst, &evt, RET, rand());
break;
case UVM32_SYSCALL_MILLIS: {
clock_t now = clock() / (CLOCKS_PER_SEC / 1000);
uvm32_arg_setval(&vmst, &evt, RET, now - start_time);