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(uxn.c) Wrapping zp

This commit is contained in:
neauoire 2023-11-01 11:10:29 -07:00
parent 8f38d8bde2
commit 6b9717276d
1 changed files with 20 additions and 20 deletions
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26
src/uxn.c
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@ -13,22 +13,22 @@ WITH REGARD TO THIS SOFTWARE.
#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; }
#define JUMP(x) { if(m2) pc = (x); else pc += (Sint8)(x); }
#define POKE(x, y) { if(m2) { t = (x); ram[t++] = y >> 8; ram[t] = y; } else ram[(x)] = (y); }
#define PEEK(o, x) { if(m2) { t = (x); o = ram[t++] << 8 | ram[t]; } else o = ram[(x)]; }
#define DEVR(o, p) { if(m2) { o = (emu_dei(u, p) << 8) | emu_dei(u, p + 1); } else o = emu_dei(u, p); }
#define DEVW(p, y) { if(m2) { emu_deo(u, p, y >> 8); emu_deo(u, p + 1, y); } else emu_deo(u, p, y); }
#define PUSH1(y) { s->dat[s->ptr++] = (y); }
#define PUSH2(y) { t = (y); s->dat[s->ptr++] = t >> 0x8; s->dat[s->ptr++] = t; }
#define PUSH2(y) { tt = (y); s->dat[s->ptr++] = tt >> 0x8; s->dat[s->ptr++] = tt; }
#define PUSHx(y) { if(m2) { PUSH2(y) } else PUSH1(y) }
#define POP1(o) { o = s->dat[--*sp]; }
#define POP2(o) { o = s->dat[--*sp] | (s->dat[--*sp] << 0x8); }
#define POPx(o) { if(m2) { POP2(o) } else POP1(o) }
#define POKE(x, y, r) { if(m2) { r = (x); ram[r++] = y >> 8; ram[r] = y; } else ram[(x)] = (y); }
#define PEEK(o, x, r) { if(m2) { r = (x); o = ram[r++] << 8 | ram[r]; } else o = ram[(x)]; }
#define DEVR(o, p) { if(m2) { o = (emu_dei(u, p) << 8) | emu_dei(u, p + 1); } else o = emu_dei(u, p); }
#define DEVW(p, y) { if(m2) { emu_deo(u, p, y >> 8); emu_deo(u, p + 1, y); } else emu_deo(u, p, y); }
int
uxn_eval(Uxn *u, Uint16 pc)
{
Uint8 ksp, *sp, *tp, *ram = u->ram;
Uint16 a, b, c, t;
Uint8 t, ksp, *sp, *tp, *ram = u->ram;
Uint16 tt, a, b, c;
if(!pc || u->dev[0x0f]) return 0;
for(;;) {
Uint8 ins = ram[pc++], opc = ins & 0x1f;
@ -66,12 +66,12 @@ uxn_eval(Uxn *u, Uint16 pc)
case 0x0d: /* JCN */ POPx(a) POP1(b) if(b) JUMP(a) break;
case 0x0e: /* JSR */ POPx(a) FLIP PUSH2(pc) JUMP(a) break;
case 0x0f: /* STH */ POPx(a) FLIP PUSHx(a) break;
case 0x10: /* LDZ */ POP1(a) PEEK(b, a) PUSHx(b) break;
case 0x11: /* STZ */ POP1(a) POPx(b) POKE(a, b) break;
case 0x12: /* LDR */ POP1(a) PEEK(b, pc + (Sint8)a) PUSHx(b) break;
case 0x13: /* STR */ POP1(a) POPx(b) POKE(pc + (Sint8)a, b) break;
case 0x14: /* LDA */ POP2(a) PEEK(b, a) PUSHx(b) break;
case 0x15: /* STA */ POP2(a) POPx(b) POKE(a, b) break;
case 0x10: /* LDZ */ POP1(a) PEEK(b, a, t) PUSHx(b) break;
case 0x11: /* STZ */ POP1(a) POPx(b) POKE(a, b, t) break;
case 0x12: /* LDR */ POP1(a) PEEK(b, pc + (Sint8)a, tt) PUSHx(b) break;
case 0x13: /* STR */ POP1(a) POPx(b) POKE(pc + (Sint8)a, b, tt) break;
case 0x14: /* LDA */ POP2(a) PEEK(b, a, tt) PUSHx(b) break;
case 0x15: /* STA */ POP2(a) POPx(b) POKE(a, b, tt) break;
case 0x16: /* DEI */ POP1(a) DEVR(b, a) PUSHx(b) break;
case 0x17: /* DEO */ POP1(a) POPx(b) DEVW(a, b) break;
case 0x18: /* ADD */ POPx(a) POPx(b) PUSHx(b + a) break;