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Added storing and loading 16 and 32 bits of RAM

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This commit is contained in:
Morten Delenk 2016-06-05 12:51:33 +00:00
parent c32d30506b
commit 2904c1c211
2 changed files with 23 additions and 4 deletions
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2
prototypes/supervm/main.c
View file

@ -175,4 +175,4 @@ int main(int argc, const char **argv)
dump_memory(p);
return 0;
}
}

25
prototypes/supervm/vm.c
View file

@ -9,12 +9,31 @@ static void cmd_copy(CommandInfo *info)
static void cmd_load(Process *p, CommandInfo *info)
{
info->output = vm_read_byte(p, info->input0);
info->output = 0;
switch(info->additional) {
case 2:
info->output|=(uint32_t)(vm_read_byte(p, info->input0+3))<<24;
info->output|=(uint32_t)(vm_read_byte(p, info->input0+2))<<16;
case 1:
info->output|=(uint32_t)(vm_read_byte(p, info->input0+1))<< 8;
case 0:
info->output|=(uint32_t)(vm_read_byte(p, info->input0+0))<< 0;
break;
}
}
static void cmd_store(Process *p, CommandInfo *info)
{
vm_write_byte(p, info->input0, info->input1);
switch(info->additional) {
case 2:
vm_write_byte(p, info->input0+3, info->input1>>24);
vm_write_byte(p, info->input0+2, info->input1>>16);
case 1:
vm_write_byte(p, info->input0+1, info->input1>>8);
case 0:
vm_write_byte(p, info->input0, info->input1);
break;
}
info->output = info->input1;
}
@ -239,4 +258,4 @@ void vm_write_byte(Process *process, uint32_t address, uint8_t value)
vm_assert(page < process->mmap.length, "Out of memory.");
process->mmap.pages[page][index] = value;
}
}