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Merged lit counter with status flag

This commit is contained in:
neauoire 2021-04-04 09:37:00 -07:00
parent 18a48a28c5
commit ab889172cf
2 changed files with 13 additions and 9 deletions
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16
src/uxn.c
View File

@ -34,7 +34,7 @@ Uint16 mempeek16(Uxn *u, Uint16 a) { return (mempeek8(u, a) << 8) + mempeek8(u,
/* Stack */
void op_brk(Uxn *u) { setflag(&u->status, FLAG_HALT, 1); }
void op_nop(Uxn *u) { (void)u; }
void op_lit(Uxn *u) { u->literal += 1; }
void op_lit(Uxn *u) { setflag(&u->status, FLAG_LIT1, 1); }
void op_pop(Uxn *u) { pop8(u->src); }
void op_dup(Uxn *u) { push8(u->src, peek8(u->src, 0)); }
void op_swp(Uxn *u) { Uint8 b = pop8(u->src), a = pop8(u->src); push8(u->src, b); push8(u->src, a); }
@ -66,7 +66,7 @@ void op_ora(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b
void op_eor(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b ^ a); }
void op_sft(Uxn *u) { Uint8 a = pop8(u->src), b = pop8(u->src); push8(u->src, b >> (a & 0x07) << ((a & 0x70) >> 4)); }
/* Stack */
void op_lit16(Uxn *u) { u->literal += 2; }
void op_lit16(Uxn *u) { setflag(&u->status, FLAG_LIT2, 1); }
void op_nop16(Uxn *u) { printf("%04x\n", pop16(u->src)); }
void op_pop16(Uxn *u) { pop16(u->src); }
void op_dup16(Uxn *u) { push16(u->src, peek16(u->src, 0)); }
@ -126,7 +126,11 @@ void
lituxn(Uxn *u, Uint8 instr)
{
push8(u->src, instr);
u->literal--;
if(getflag(&u->status, FLAG_LIT2)) {
setflag(&u->status, FLAG_LIT2, 0);
setflag(&u->status, FLAG_LIT1, 1);
} else if(getflag(&u->status, FLAG_LIT1))
setflag(&u->status, FLAG_LIT1, 0);
}
void
@ -141,7 +145,7 @@ opcuxn(Uxn *u, Uint8 instr)
int
stepuxn(Uxn *u, Uint8 instr)
{
if(u->literal > 0)
if(getflag(&u->status, FLAG_LIT2) || getflag(&u->status, FLAG_LIT1))
lituxn(u, instr);
else
opcuxn(u, instr);
@ -155,7 +159,7 @@ stepuxn(Uxn *u, Uint8 instr)
int
evaluxn(Uxn *u, Uint16 vec)
{
u->literal = 0;
u->status = 0;
u->ram.ptr = vec;
u->wst.error = 0;
u->rst.error = 0;
@ -195,6 +199,6 @@ portuxn(Uxn *u, Uint8 id, char *name, Uint8 (*pofn)(Uxn *u, Uint16 ptr, Uint8 b0
Device *d = &u->dev[id];
d->addr = PAGE_DEVICE + id * 0x10;
d->poke = pofn;
printf("Device #%d: %s, at 0x%04x \n", id - 1, name, d->addr);
printf("Device #%d: %s, at 0x%04x \n", id, name, d->addr);
return d;
}

6
src/uxn.h
View File

@ -17,8 +17,8 @@ typedef unsigned short Uint16;
typedef signed short Sint16;
#define FLAG_HALT 0x01
#define FLAG_LIT1 0x04
#define FLAG_LIT2 0x08
#define FLAG_LIT1 0x02
#define FLAG_LIT2 0x04
#define PAGE_DEVICE 0x0100
#define PAGE_VECTORS 0x0200
@ -40,7 +40,7 @@ typedef struct Device {
} Device;
typedef struct Uxn {
Uint8 literal, status;
Uint8 status;
Stack wst, rst, *src, *dst;
Memory ram;
Device dev[16];