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mirror of https://gitlab.os-k.eu/os-k-team/kvisc.git synced 2023-08-25 14:05:46 +02:00
kvisc/vm/pc/decode.h
julianb0 e1299836de
vm
2019-08-03 19:01:12 +02:00

90 lines
1.4 KiB
C

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
enum
{
CD_NONE,
CD_C,
CD_O,
CD_Z,
CD_S,
CD_P,
CD_BE,
CD_L,
CD_LE,
CD_AXZ,
CD_BXZ,
CD_CXZ,
CD_DXZ,
};
enum
{
SUFF_REP = (1 << 7),
SUFF_LOCK = (1 << 6),
SUFF_COND = 0b00011111,
};
enum
{
A_NONE = 0,
A_REG = 3,
A_IMM8 = 1,
A_IMM16 = 2,
A_IMM32 = 4,
A_IMM64 = 8,
AM_RR = 0xF0,
AM_RRI = 0xF1,
AM_RRII = 0xF2,
};
#define ACC_FMT_IS_MEM(x) (((x) & 0xF0) != 0)
#define ACC_IS_MEM(p) ACC_FMT_IS_MEM((p)->type)
struct acc_t
{
uint type;
ulong val;
// A_REG
uchar reg;
// AM_...
ulong addr;
uint mlen;
// For instruction dumping ONLY
uchar reg1, reg2;
char imm1;
long imm2;
};
enum { NOPRM, P_REG, P_IMM, P_MEM=4 };
struct instr_t
{
char *name;
uint nprms;
uint (*func)(acc_t *, acc_t *, acc_t *,
ulong *, ulong *, ulong *);
};
bool eval_cond(uint cond);
void exec_instr(instr_t *in,
acc_t *p1,
acc_t *p2,
acc_t *p3,
bool lock,
bool rep);
void dump_instr(instr_t *in,
acc_t *p1,
acc_t *p2,
acc_t *p3,
bool lock,
bool rep);