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(uxn.c) Simple branching value

This commit is contained in:
neauoire 2023-11-01 16:30:42 -07:00
parent 21dfea7890
commit 91257363c2
1 changed files with 7 additions and 9 deletions
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16
src/uxn.c
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@ -38,16 +38,14 @@ uxn_eval(Uxn *u, Uint16 pc)
else
sp = &s->ptr;
/* Opcodes */
switch(opc - (!opc * (ins >> 5))) {
switch(opc ? opc : ins) {
/* Immediate */
case -0x0: /* BRK */ return 1;
case -0x1: /* JCI */ POP1(b) if(!b) { pc += 2; break; } /* else fallthrough */
case -0x2: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
case -0x3: /* JSI */ PUSH2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
case -0x4: /* LIT */
case -0x6: /* LITr */ PUSH1(ram[pc++]) break;
case -0x5: /* LIT2 */
case -0x7: /* LIT2r */ PUSH1(ram[pc++]) PUSH1(ram[pc++]) break;
case 0x00: /* BRK */ return 1;
case 0x20: /* JCI */ POP1(b) if(!b) { pc += 2; break; } /* else fallthrough */
case 0x40: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
case 0x60: /* JSI */ PUSH2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
case 0x80: case 0xc0: /* LIT */ PUSH1(ram[pc++]) break;
case 0xa0: case 0xe0: /* LIT2 */ PUSH1(ram[pc++]) PUSH1(ram[pc++]) break;
/* ALU */
case 0x01: /* INC */ POPx(a) PUSHx(a + 1) break;
case 0x02: /* POP */ POPx(a) break;