commit 8be4980
Devine Lu Linvega
·
2024-07-02 01:04:09 +0000 UTC
parent 72994b6
Faster IMM opcodes
1 files changed,
+8,
-6
+8,
-6
1@@ -20,7 +20,7 @@ WITH REGARD TO THIS SOFTWARE.
2 #define FLP { s = ins & 0x40 ? &uxn.wst : &uxn.rst; }
3 #define JMP(x) { if(m2) pc = (x); else pc += (Sint8)(x); }
4 #define PO1(o) { o = s->dat[--*sp]; }
5-#define PO2(o) { o = s->dat[--*sp] | (s->dat[--*sp] << 0x8); }
6+#define PO2(o) { o = s->dat[--*sp] | (s->dat[--*sp] << 8); }
7 #define POx(o) { if(m2) { PO2(o) } else PO1(o) }
8 #define PU1(y) { s->dat[s->ptr++] = (y); }
9 #define PU2(y) { tt = (y); s->dat[s->ptr++] = tt >> 0x8; s->dat[s->ptr++] = tt; }
10@@ -46,11 +46,13 @@ uxn_eval(Uint16 pc)
11 case 0x00:
12 switch(ins) {
13 /* BRK */ case 0x00: return 1;
14- /* JCI */ case 0x20: PO1(b) if(!b) { pc += 2; break; } a = uxn.ram[pc++] << 8 | uxn.ram[pc++]; pc += a; break;
15- /* JMI */ case 0x40: a = uxn.ram[pc++] << 8 | uxn.ram[pc++]; pc += a; break;
16- /* JSI */ case 0x60: PU2(pc + 2) a = uxn.ram[pc++] << 8 | uxn.ram[pc++]; pc += a; break;
17- /* LIT2 */ case 0xa0: case 0xe0: PU1(uxn.ram[pc++]) PU1(uxn.ram[pc++]) break;
18- /* LIT */ case 0x80: case 0xc0: PU1(uxn.ram[pc++]) break;
19+ /* JCI */ case 0x20: if(uxn.wst.dat[--uxn.wst.ptr]) goto JMI; pc += 2; break;
20+ /* JMI */ case 0x40: JMI: a = uxn.ram[pc++] << 8 | uxn.ram[pc++]; pc += a; break;
21+ /* JSI */ case 0x60: tt = pc + 2; uxn.rst.dat[uxn.rst.ptr++] = tt >> 8; uxn.rst.dat[uxn.rst.ptr++] = tt; goto JMI;
22+ /* LIT2 */ case 0xa0: uxn.wst.dat[uxn.wst.ptr++] = uxn.ram[pc++], uxn.wst.dat[uxn.wst.ptr++] = uxn.ram[pc++]; break;
23+ /* LIT2r */ case 0xe0: uxn.rst.dat[uxn.rst.ptr++] = uxn.ram[pc++], uxn.rst.dat[uxn.rst.ptr++] = uxn.ram[pc++]; break;
24+ /* LIT */ case 0x80: uxn.wst.dat[uxn.wst.ptr++] = uxn.ram[pc++]; break;
25+ /* LITr */ case 0xc0: uxn.rst.dat[uxn.rst.ptr++] = uxn.ram[pc++]; break;
26 } break;
27 /* INC */ OPC(0x01, POx(a) PUx(a + 1))
28 /* POP */ OPC(0x02, POx(a))