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Merge branch 'master' of https://github.com/MasterQ32/DasOS

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This commit is contained in:
Felix Queißner 2016-06-14 20:42:23 +02:00
commit 8c23fa6b8f
3 changed files with 42 additions and 22 deletions
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37
documentation/supervm.md
View file

@ -1,4 +1,4 @@
# SuperVM
# SuperVM
SuperVM is a stack machine with a simple, but flexible command
set.
@ -219,23 +219,24 @@ This allows a configuration such that the right hand side operand
is taken by the argument of the instruction instead of beeing popped
from the stack.
| cmdinfo | Operation |
|---------|-----------------------------|
| 0 | Addition |
| 1 | Subtraction |
| 2 | Multiplication |
| 3 | Division |
| 4 | Euclidean Division / Modulo |
| 5 | Bitwise Logic And |
| 6 | Bitwise Logic Or |
| 7 | Bitwise Logic Xor |
| 8 | Bitwise Logic Not |
| 9 | Rotating Bit Shift Left |
| 10 | Rotating Bit Shift Right |
| 11 | Arithmetic Bit Shift Left |
| 12 | Arithmetic Bit Shift Right |
| 13 | Logic Bit Shift Left |
| 14 | Logic Bit Shift Right |
| cmdinfo | Operation | Forumla |
|---------|-----------------------------|-----------------|
| 0 | Addition | input1 + input0 |
| 1 | Subtraction | input1 - input0 |
| 2 | Multiplication | input1 * input0 |
| 3 | Division | input1 / input0 |
| 4 | Euclidean Division / Modulo | input1 % input0 |
| 5 | Bitwise Logic And | input1 ∧ input0 |
| 6 | Bitwise Logic Or | input1 ∨ input0 |
| 7 | Bitwise Logic Xor | input1 ⊻ input0 |
| 8 | Bitwise Logic Not | ˜input0 |
| 9 | Rotating Bit Shift Left | input1 ⊲ input0 |
| 10 | Rotating Bit Shift Right | input1 ⊳ input0 |
| 11 | Arithmetic Bit Shift Left | input1 ≺ input0 |
| 12 | Arithmetic Bit Shift Right | input1 ≻ input0 |
| 13 | Logic Bit Shift Left | input1 « input0 |
| 14 | Logic Bit Shift Right | input1 » input0 |
| 15 | Negation | -input0 |
#### SpGet, SpSet
These commands modify the stack pointer directly.

21
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)
{
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;
}