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VM: added OP_DECPTR, minor refactoring of laikaB_unlock

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This commit is contained in:
CPunch 2022-04-30 16:21:29 -05:00
parent c16cdf3644
commit c63bfe00af
3 changed files with 23 additions and 12 deletions
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17
lib/include/lbox.h
View File

@ -27,13 +27,18 @@ struct sLaikaB_box {
};
LAIKA_FORCEINLINE void* laikaB_unlock(struct sLaikaB_box *box, void *data) {
struct sLaikaV_vm vm = {.pc = 0};
struct sLaikaV_vm vm = {
/* boxes have 2 reserved constants, [0] for the output, [1] for the input */
.constList = {
LAIKA_MAKE_VM_PTR(box->unlockedData),
LAIKA_MAKE_VM_PTR(data),
},
.code = {0},
.stack = {0},
.pc = 0
};
memcpy(vm.code, box->code, LAIKA_VM_CODESIZE);
/* boxes have 2 reserved constants, 0 for the output, 1 for the input */
vm.constList[0].ptr = box->unlockedData;
vm.constList[1].ptr = data;
laikaV_execute(&vm);
return (void*)box->unlockedData;
}

12
lib/include/lvm.h
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@ -32,11 +32,11 @@ struct sLaikaV_vm {
int pc;
};
#define LAIKA_MAKE_VM(_consts, _code) (struct sLaikaV_vm)({.constList = _consts, .code = _code, .pc = 0, .stack = {}})
#define LAIKA_MAKE_VM(_consts, _code) {.constList = _consts, .code = _code, .pc = 0, .stack = {0}}
/* constants */
#define LAIKA_MAKE_VM_INT(_i) (struct sLaikaV_vm_val)({.i = _i})
#define LAIKA_MAKE_VM_PTR(_ptr) (struct sLaikaV_vm_val)({.ptr = _ptr})
#define LAIKA_MAKE_VM_INT(_i) {.i = _i}
#define LAIKA_MAKE_VM_PTR(_ptr) {.ptr = _ptr}
/* instructions */
#define LAIKA_MAKE_VM_IA(opcode, a) opcode, a
#define LAIKA_MAKE_VM_IAB(opcode, a, b) opcode, a, b
@ -49,6 +49,7 @@ enum {
OP_READ, /* stk_indx[uint8_t].i = *(int8_t*)stk_indx[uint8_t] */
OP_WRITE, /* *(uint8_t*)stk_indx[uint8_t].ptr = stk_indx[uint8_t].i */
OP_INCPTR, /* stk_indx[uint8_t].ptr++ */
OP_DECPTR, /* stk_indx[uint8_t].ptr-- */
/* arithmetic */
OP_ADD, /* stk_indx[uint8_t] = stk_indx[uint8_t] + stk_indx[uint8_t] */
@ -110,6 +111,11 @@ LAIKA_FORCEINLINE void laikaV_execute(struct sLaikaV_vm *vm) {
vm->stack[ptr].ptr++;
break;
}
case OP_DECPTR: {
uint8_t ptr = READBYTE;
vm->stack[ptr].ptr--;
break;
}
case OP_ADD: BINOP(+);
case OP_SUB: BINOP(-);
case OP_MUL: BINOP(*);

4
tools/vmtest/src/main.c
View File

@ -18,8 +18,8 @@ int main(int argv, char **argc) {
};
struct sLaikaB_box box = {
{0}, /* reserved */
{ /* stack layout:
.unlockedData = {0}, /* reserved */
.code = { /* stack layout:
[0] - unlockedData (ptr)
[1] - data (ptr)
[2] - key (uint8_t)