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Made the uxn stacks private again

This commit is contained in:
Devine Lu Linvega 2023-04-11 10:14:29 -07:00
parent 83237c9641
commit 3973bc2ab8
3 changed files with 14 additions and 16 deletions
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14
src/devices/system.c
View File

@ -48,8 +48,8 @@ system_cmd(Uint8 *ram, Uint16 addr)
void
system_inspect(Uxn *u)
{
system_print(u->wst, "wst");
system_print(u->rst, "rst");
system_print(&u->wst, "wst");
system_print(&u->rst, "rst");
}
int
@ -89,11 +89,11 @@ uxn_halt(Uxn *u, Uint8 instr, Uint8 err, Uint16 addr)
Uint8 *d = &u->dev[0x00];
Uint16 handler = PEEK2(d);
if(handler) {
u->wst->ptr = 4;
u->wst->dat[0] = addr >> 0x8;
u->wst->dat[1] = addr & 0xff;
u->wst->dat[2] = instr;
u->wst->dat[3] = err;
u->wst.ptr = 4;
u->wst.dat[0] = addr >> 0x8;
u->wst.dat[1] = addr & 0xff;
u->wst.dat[2] = instr;
u->wst.dat[3] = err;
return uxn_eval(u, handler);
} else {
system_inspect(u);

14
src/uxn.c
View File

@ -31,8 +31,8 @@ WITH REGARD TO THIS SOFTWARE.
#define SET(mul, add) { if(mul > s->ptr) HALT(1) tmp = s->ptr + k * mul + add; if(tmp > 254) HALT(2) s->ptr = tmp; }
#define PUT(o, v) { s->dat[(Uint8)(s->ptr - 1 - (o))] = (v); }
#define PUT2(o, v) { tmp = (v); s->dat[(Uint8)(s->ptr - o - 2)] = tmp >> 8; s->dat[(Uint8)(s->ptr - o - 1)] = tmp; }
#define PUSH(stack, v) { if(s->ptr > 254) HALT(2) stack->dat[stack->ptr++] = (v); }
#define PUSH2(stack, v) { if(s->ptr > 253) HALT(2) tmp = (v); stack->dat[stack->ptr] = tmp >> 8; stack->dat[stack->ptr + 1] = tmp; stack->ptr += 2; }
#define PUSH(stack, v) { if((stack)->ptr > 254) HALT(2) (stack)->dat[(stack)->ptr++] = (v); }
#define PUSH2(stack, v) { if((stack)->ptr > 253) HALT(2) tmp = (v); (stack)->dat[(stack)->ptr] = tmp >> 8; (stack)->dat[(stack)->ptr + 1] = tmp; (stack)->ptr += 2; }
#define DEO(a, b) { u->dev[(a)] = (b); if((deo_mask[(a) >> 4] >> ((a) & 0xf)) & 0x1) uxn_deo(u, (a)); }
#define DEI(a, b) { PUT((a), ((dei_mask[(b) >> 4] >> ((b) & 0xf)) & 0x1) ? uxn_dei(u, (b)) : u->dev[(b)]) }
@ -46,14 +46,14 @@ uxn_eval(Uxn *u, Uint16 pc)
for(;;) {
ins = u->ram[pc++];
k = !!(ins & 0x80);
s = ins & 0x40 ? u->rst : u->wst;
s = ins & 0x40 ? &u->rst : &u->wst;
opc = !(ins & 0x1f) ? 0 - (ins >> 5) : ins & 0x3f;
switch(opc) {
/* IMM */
case 0x00: /* BRK */ return 1;
case 0xff: /* JCI */ pc += !!s->dat[--s->ptr] * PEEK2(u->ram + pc) + 2; break;
case 0xfe: /* JMI */ pc += PEEK2(u->ram + pc) + 2; break;
case 0xfd: /* JSI */ PUSH2(u->rst, pc + 2) pc += PEEK2(u->ram + pc) + 2; break;
case 0xfd: /* JSI */ PUSH2(&u->rst, pc + 2) pc += PEEK2(u->ram + pc) + 2; break;
case 0xfc: /* LIT */ PUSH(s, u->ram[pc++]) break;
case 0xfb: /* LIT2 */ PUSH2(s, PEEK2(u->ram + pc)) pc += 2; break;
case 0xfa: /* LITr */ PUSH(s, u->ram[pc++]) break;
@ -72,8 +72,8 @@ uxn_eval(Uxn *u, Uint16 pc)
case 0x0b: /* LTH */ t=T;n=N; SET(2,-1) PUT(0, n < t) break; case 0x2b: t=T2;n=N2; SET(4,-3) PUT(0, n < t) break;
case 0x0c: /* JMP */ t=T; SET(1,-1) pc += (Sint8)t; break; case 0x2c: t=T2; SET(2,-2) pc = t; break;
case 0x0d: /* JCN */ t=T;n=N; SET(2,-2) pc += !!n * (Sint8)t; break; case 0x2d: t=T2;n=L; SET(3,-3) if(n) pc = t; break;
case 0x0e: /* JSR */ t=T; SET(1,-1) PUSH2(u->rst, pc) pc += (Sint8)t; break; case 0x2e: t=T2; SET(2,-2) PUSH2(u->rst, pc) pc = t; break;
case 0x0f: /* STH */ t=T; SET(1,-1) PUSH((ins & 0x40 ? u->wst : u->rst), t) break; case 0x2f: t=T2; SET(2,-2) PUSH2((ins & 0x40 ? u->wst : u->rst), t) break;
case 0x0e: /* JSR */ t=T; SET(1,-1) PUSH2(&u->rst, pc) pc += (Sint8)t; break; case 0x2e: t=T2; SET(2,-2) PUSH2(&u->rst, pc) pc = t; break;
case 0x0f: /* STH */ t=T; SET(1,-1) PUSH((ins & 0x40 ? &u->wst : &u->rst), t) break; case 0x2f: t=T2; SET(2,-2) PUSH2((ins & 0x40 ? &u->wst : &u->rst), t) break;
case 0x10: /* LDZ */ t=T; SET(1, 0) PUT(0, u->ram[t]) break; case 0x30: t=T; SET(1, 1) PUT2(0, PEEK2(u->ram + t)) break;
case 0x11: /* STZ */ t=T;n=N; SET(2,-2) u->ram[t] = n; break; case 0x31: t=T;n=H2; SET(3,-3) POKE2(u->ram + t, n) break;
case 0x12: /* LDR */ t=T; SET(1, 0) PUT(0, u->ram[pc + (Sint8)t]) break; case 0x32: t=T; SET(1, 1) PUT2(0, PEEK2(u->ram + pc + (Sint8)t)) break;
@ -101,8 +101,6 @@ uxn_boot(Uxn *u, Uint8 *ram)
char *cptr = (char *)u;
for(i = 0; i < sizeof(*u); i++)
cptr[i] = 0;
u->wst = (Stack *)(ram + 0xf0000);
u->rst = (Stack *)(ram + 0xf0100);
u->ram = ram;
return 1;
}

2
src/uxn.h
View File

@ -30,7 +30,7 @@ typedef struct {
typedef struct Uxn {
Uint8 *ram, dev[256];
Stack *wst, *rst;
Stack wst, rst;
Uint8 (*dei)(struct Uxn *u, Uint8 addr);
void (*deo)(struct Uxn *u, Uint8 addr);
} Uxn;