oreodave/avm
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Added and implemented OP_JUMP_ABS

Browse Source 
Jumps to the operand given, interpreted as a word, an absolute
address.
This commit is contained in:
Aryadev Chavali
2023-10-22 20:40:42 +01:00
parent bc0e0fce25
commit fffad9aea3
3 changed files with 26 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/inst.c
View File

@@ -114,6 +114,10 @@ const char *opcode_as_cstr(opcode_t code)
case OP_EQ_WORD:
return "EQ_WORD";
break;
case OP_JUMP_ABS:
return "JUMP_ABS";
break;
break;
case OP_HALT:
return "HALT";
break;
@@ -205,7 +209,7 @@ void inst_print(inst_t instruction, FILE *fp)
size_t inst_bytecode_size(inst_t inst)
{
static_assert(NUMBER_OF_OPCODES == 31, "inst_bytecode_size: Out of date");
static_assert(NUMBER_OF_OPCODES == 32, "inst_bytecode_size: Out of date");
size_t size = 1; // for opcode
if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH))
{
@@ -220,15 +224,16 @@ size_t inst_bytecode_size(inst_t inst)
OPCODE_IS_TYPE(inst.opcode, OP_MOV))
// Only need a byte for the register
++size;
else if (OPCODE_IS_TYPE(inst.opcode, OP_POP))
// No operand or register so leave as is
{}
else if (OPCODE_IS_TYPE(inst.opcode, OP_DUP))
size += WORD_SIZE;
else if (inst.opcode == OP_JUMP_ABS)
size += WORD_SIZE;
return size;
}
void inst_write_bytecode(inst_t inst, darr_t *darr)
{
static_assert(NUMBER_OF_OPCODES == 31, "inst_write_bytecode: Out of date");
static_assert(NUMBER_OF_OPCODES == 32, "inst_write_bytecode: Out of date");
// Append opcode
darr_append_byte(darr, inst.opcode);
// Then append 0 or more operands
@@ -238,7 +243,7 @@ void inst_write_bytecode(inst_t inst, darr_t *darr)
else if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH_REGISTER) ||
OPCODE_IS_TYPE(inst.opcode, OP_MOV))
to_append = DATA_TYPE_BYTE;
else if (OPCODE_IS_TYPE(inst.opcode, OP_DUP))
else if (OPCODE_IS_TYPE(inst.opcode, OP_DUP) || inst.opcode == OP_JUMP)
to_append = DATA_TYPE_WORD;
switch (to_append)
@@ -300,7 +305,7 @@ data_t read_type_from_darr(darr_t *darr, data_type_t type)
inst_t inst_read_bytecode(darr_t *darr)
{
static_assert(NUMBER_OF_OPCODES == 31, "inst_read_bytecode: Out of date");
static_assert(NUMBER_OF_OPCODES == 32, "inst_read_bytecode: Out of date");
if (darr->used >= darr->available)
return (inst_t){0};
inst_t inst = {0};
@@ -315,7 +320,7 @@ inst_t inst_read_bytecode(darr_t *darr)
else if (OPCODE_IS_TYPE(opcode, OP_PUSH_REGISTER) ||
OPCODE_IS_TYPE(opcode, OP_MOV))
inst.operand = read_type_from_darr(darr, DATA_TYPE_BYTE);
else if (OPCODE_IS_TYPE(opcode, OP_DUP))
else if (OPCODE_IS_TYPE(opcode, OP_DUP) || opcode == OP_JUMP_ABS)
inst.operand = read_type_from_darr(darr, DATA_TYPE_WORD);
// Otherwise opcode doesn't take operands