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Faster JSI opcode

This commit is contained in:
Devine Lu Linvega 2024-06-30 19:54:12 -08:00
parent e379cfa2ad
commit d3ea48e759
1 changed files with 1 additions and 6 deletions
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7
src/uxn.c
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@ -50,12 +50,7 @@ uxn_eval(Uint16 pc)
case 0x00: /* BRK */ return 1;
case 0x20: /* JCI */ if(!uxn.wst.dat[uxn.wst.ptr--]) { pc += 2; break; } /* fall-through */
case 0x40: /* JMI */ rr = uxn.ram + pc; pc += 2 + PEEK2(rr); break;
case 0x60: /* JSI */ uxn.rst.ptr += 2;
rr = uxn.ram + pc;
pc += 2; r = pc;
uxn.rst.dat[uxn.rst.ptr] = pc;
uxn.rst.dat[(Uint8)(uxn.rst.ptr - 1)] = pc >> 8;
pc += PEEK2(rr); break;
case 0x60: /* JSI */ rr = uxn.ram + pc; pc += 2; uxn.rst.dat[++uxn.rst.ptr] = pc >> 8; uxn.rst.dat[++uxn.rst.ptr] = pc; pc += PEEK2(rr); break;
case 0xa0: /* LIT2 */ uxn.wst.dat[++uxn.wst.ptr] = uxn.ram[pc++]; /* fall-through */
case 0x80: /* LIT */ uxn.wst.dat[++uxn.wst.ptr] = uxn.ram[pc++]; break;
case 0xe0: /* LIT2r */ uxn.rst.dat[++uxn.rst.ptr] = uxn.ram[pc++]; /* fall-through */