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Implements cmd_math partially. Sets demo program to count from 0 to 10.

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This commit is contained in:
Felix Queißner 2016-05-19 15:41:18 +02:00
parent e313356054
commit 9a7e2e8ceb
2 changed files with 99 additions and 8 deletions
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81
prototypes/supervm/main.c
View file

@ -6,20 +6,86 @@
Instruction code[] =
{
// { VM_EXEC_X, VM_EXEC_X, VM_INPUT_ZERO, VM_INPUT_ZERO, VM_CMD_COPY, 0, VM_FLAG_NO, VM_OUTPUT_DISCARD, 0 },
{
{ // push 0
VM_EXEC_X,
VM_EXEC_X,
VM_INPUT_ZERO,
VM_INPUT_ARG,
VM_INPUT_ZERO,
VM_CMD_COPY,
0,
VM_FLAG_NO,
VM_OUTPUT_PUSH,
0
},
{ // dup
VM_EXEC_X,
VM_EXEC_X,
VM_INPUT_PEEK,
VM_INPUT_ZERO,
VM_CMD_COPY,
0,
VM_FLAG_NO,
VM_OUTPUT_PUSH,
0
},
{ // cmp 10
VM_EXEC_X,
VM_EXEC_X,
VM_INPUT_ARG,
VM_INPUT_POP,
VM_CMD_MATH,
VM_MATH_SUB,
VM_FLAG_YES,
VM_OUTPUT_DISCARD,
1337 },
10
},
{ // jmp 7
VM_EXEC_1,
VM_EXEC_X,
VM_INPUT_ARG,
VM_INPUT_ZERO,
VM_CMD_COPY,
0,
VM_FLAG_NO,
VM_OUTPUT_JUMP,
7
},
{ // add 1
VM_EXEC_X,
VM_EXEC_X,
VM_INPUT_ARG,
VM_INPUT_POP,
VM_CMD_MATH,
0,
VM_FLAG_NO,
VM_OUTPUT_PUSH,
1
},
{ // jmp 1
VM_EXEC_X,
VM_EXEC_X,
VM_INPUT_ARG,
VM_INPUT_ZERO,
VM_CMD_COPY,
0,
VM_FLAG_NO,
VM_OUTPUT_JUMP,
1
},
};
void dump_proc(Process *process)
{
if(process->flags & VM_FLAG_Z)
printf("z");
else
printf(" ");
if(process->flags & VM_FLAG_N)
printf("n");
else
printf(" ");
printf("[ ");
for(int i = 1; i <= process->stackPointer; i++) {
printf("%d ", process->stack[i]);
@ -37,17 +103,16 @@ void vm_assert(int assertion, const char *msg)
int main(int argc, const char **argv)
{
Module module = { code, 1 };
Module module = { code, 6 };
Process process = { &module, 0, 0, 0, 0 };
Process *p = &process;
vm_push(p, 10);
dump_proc(p);
int stillAlive = vm_step_process(p);
while(vm_step_process(p)) {
dump_proc(p);
}
dump_proc(p);
printf("Process %s.\n", (stillAlive ? "still running" : "terminated"));
return 0;
}

26
prototypes/supervm/vm.c
View file

@ -1,10 +1,13 @@
#include "vm.h"
#include <stdio.h>
typedef struct
{
uint32_t input0;
uint32_t input1;
uint32_t argument;
uint32_t additional;
uint32_t output;
} CommandInfo;
@ -14,6 +17,27 @@ static void cmd_copy(CommandInfo *info)
info->output = info->input0;
}
static void cmd_math(CommandInfo *info)
{
switch(info->additional)
{
// IMPORTANT:
// input1 - input0 because then input0 can be a fixed value
#define S(name, op) case name: info->output = info->input1 op info->input0; break;
S(VM_MATH_ADD, +)
S(VM_MATH_SUB, -)
S(VM_MATH_MUL, *)
S(VM_MATH_DIV, /)
S(VM_MATH_MOD, %)
S(VM_MATH_AND, &)
S(VM_MATH_OR, |)
S(VM_MATH_XOR, ^)
#undef S
case VM_MATH_NOT: info->output = ~info->input0; break;
default: vm_assert(0, "Invalid instruction: MATH command not defined."); break;
}
}
int vm_step_process(Process *process)
{
vm_assert(process != NULL, "process must not be NULL.");
@ -78,10 +102,12 @@ int vm_step_process(Process *process)
}
info.argument = instr.argument;
info.additional = instr.cmdinfo;
switch(instr.command)
{
case VM_CMD_COPY: cmd_copy(&info); break;
case VM_CMD_MATH: cmd_math(&info); break;
default: vm_assert(0, "Invalid instruction: command undefined.");
}