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Added and implemented OP_PRINT*

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Here is where we may have differing interpretations of what the bits
in the data pile may actually mean.  This in particular refers to
printing the signed or unsigned versions of the bits given.  Also,
interpreting some byte as a character or just a raw number.
This commit is contained in:
Aryadev Chavali
2023-10-23 00:09:12 +01:00
parent 45ad8f7296
commit ae9bc91713
3 changed files with 110 additions and 13 deletions
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77
src/runtime.c
View File

@@ -11,6 +11,7 @@
*/
#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -54,7 +55,7 @@ const char *err_as_cstr(err_t err)
err_t vm_execute(vm_t *vm)
{
static_assert(NUMBER_OF_OPCODES == 37, "vm_execute: Out of date");
static_assert(NUMBER_OF_OPCODES == 43, "vm_execute: Out of date");
struct Program *prog = &vm->program;
if (prog->ptr >= prog->max)
return ERR_END_OF_PROGRAM;
@@ -135,12 +136,82 @@ err_t vm_execute(vm_t *vm)
return ERR_INVALID_PROGRAM_ADDRESS;
prog->ptr = addr;
}
else if (instruction.opcode >= OP_PRINT_CHAR &&
instruction.opcode <= OP_PRINT_WORD)
{
data_t datum = {0};
enum
{
TYPE_CHAR,
TYPE_BYTE,
TYPE_INT,
TYPE_HWORD,
TYPE_LONG,
TYPE_WORD
} print_type;
err_t err = ERR_OK;
if (instruction.opcode == OP_PRINT_BYTE ||
instruction.opcode == OP_PRINT_CHAR)
{
print_type = instruction.opcode == OP_PRINT_BYTE ? TYPE_BYTE : TYPE_CHAR;
err = vm_pop_byte(vm, &datum);
}
else if (instruction.opcode == OP_PRINT_HWORD ||
instruction.opcode == OP_PRINT_INT)
{
print_type = instruction.opcode == OP_PRINT_HWORD ? TYPE_HWORD : TYPE_INT;
err = vm_pop_hword(vm, &datum);
}
else if (instruction.opcode == OP_PRINT_WORD ||
instruction.opcode == OP_PRINT_LONG)
{
print_type = instruction.opcode == OP_PRINT_WORD ? TYPE_WORD : TYPE_LONG;
err = vm_pop_word(vm, &datum);
}
if (err)
return err;
switch (print_type)
{
case TYPE_CHAR: {
char c = 0;
memcpy(&c, &datum.as_byte, 1);
printf("%c", c);
break;
}
case TYPE_BYTE:
printf("0x%x", datum.as_byte);
break;
case TYPE_INT: {
int32_t i = 0;
memcpy(&i, &datum.as_hword, HWORD_SIZE);
printf("%" PRId32, i);
break;
}
case TYPE_HWORD:
printf("%" PRIu32, datum.as_hword);
break;
case TYPE_LONG: {
int64_t i = 0;
memcpy(&i, &datum.as_word, WORD_SIZE);
printf("%" PRId64, i);
break;
}
case TYPE_WORD:
printf("%" PRIu64, datum.as_word);
break;
}
prog->ptr++;
}
else if (instruction.opcode == OP_HALT)
{
// Do nothing here. Should be caught by callers of vm_execute
return ERR_OK;
}
return ERR_INVALID_OPCODE;
else
return ERR_INVALID_OPCODE;
return ERR_OK;
}
err_t vm_execute_all(vm_t *vm)