d6
/
uxn
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

(uxn.c) Only one writing macro per line

This commit is contained in:
neauoire 2023-08-29 10:48:19 -07:00
parent 7992d54115
commit c9183a02e5
1 changed files with 22 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
src/uxn.c
View File

@ -28,8 +28,12 @@ WITH REGARD TO THIS SOFTWARE.
#define HALT(c) { return emu_halt(u, ins, c, pc - 1); }
#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; }
#define SET(x, y) { r = s->ptr; if(x > r) HALT(1) r += (x & k) + y; if(r > 254) HALT(2) ptr = s->dat + r - 1; s->ptr = r; }
#define PUT1(v) { *(ptr--) = v; }
#define PUT2(v) { r = (v); *(ptr--) = r; *(ptr--) = r >> 8; }
#define PUT1(a) { *(ptr) = a; }
#define PUT1x2(a, b) { *(ptr) = a; *(ptr - 1) = b; }
#define PUT1x3(a, b, c) { *(ptr) = a; *(ptr - 1) = b; *(ptr - 2) = c; }
#define PUT2(a) { POKE2(ptr - 1, a) }
#define PUT2x2(a, b) { POKE2(ptr - 1, a) POKE2(ptr - 3, b) }
#define PUT2x3(a, b, c) { POKE2(ptr - 1, a) POKE2(ptr - 3, b) POKE2(ptr - 5, c) }
int
uxn_eval(Uxn *u, Uint16 pc)
@ -42,14 +46,14 @@ uxn_eval(Uxn *u, Uint16 pc)
int k = ins & 0x80 ? 0xff : 0;
Stack *s = ins & 0x40 ? &u->rst : &u->wst;
Uint8 *ptr = s->dat + s->ptr - 1;
switch(ins & 0x1f ? ins & 0x3f : (0 - (ins >> 5))) {
switch(ins & 0x1f ? ins & 0x3f : ins << 4) {
/* IMM */
case -0: /* BRK */ return 1;
case -1: /* JCI */ if(!s->dat[--s->ptr]) { pc += 2; break; } /* else fallthrough */
case -2: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
case -3: /* JSI */ SET(0, 2) PUT2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
case -4: /* LITr */ case -6: SET(0, 1) PUT1(ram[pc++]) break;
case -5: /* LIT2r*/ case -7: SET(0, 2) PUT2(PEEK2(ram + pc)) pc += 2; break;
case 0x000: /* BRK */ return 1;
case 0x200: /* JCI */ if(!s->dat[--s->ptr]) { pc += 2; break; } /* else fallthrough */
case 0x400: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
case 0x600: /* JSI */ SET(0, 2) PUT2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
case 0x800: /* LIT */ case 0xc00: SET(0, 1) PUT1(ram[pc++]) break;
case 0xa00: /* LIT2 */ case 0xe00: SET(0, 2) PUT2(PEEK2(ram + pc)) pc += 2; break;
/* ALU */
case 0x01: /* INC */ t=T; SET(1, 0) PUT1(t + 1) break;
case 0x21: /* INC2 */ t=T2; SET(2, 0) PUT2(t + 1) break;
@ -57,14 +61,14 @@ uxn_eval(Uxn *u, Uint16 pc)
case 0x22: /* POP2 */ SET(2,-2) break;
case 0x03: /* NIP */ t=T; SET(2,-1) PUT1(t) break;
case 0x23: /* NIP2 */ t=T2; SET(4,-2) PUT2(t) break;
case 0x04: /* SWP */ t=T;n=N; SET(2, 0) PUT1(n) PUT1(t) break;
case 0x24: /* SWP2 */ t=T2;n=N2; SET(4, 0) PUT2(n) PUT2(t) break;
case 0x05: /* ROT */ t=T;n=N;l=L; SET(3, 0) PUT1(l) PUT1(t) PUT1(n) break;
case 0x25: /* ROT2 */ t=T2;n=N2;l=L2; SET(6, 0) PUT2(l) PUT2(t) PUT2(n) break;
case 0x06: /* DUP */ t=T; SET(1, 1) PUT1(t) PUT1(t) break;
case 0x26: /* DUP2 */ t=T2; SET(2, 2) PUT2(t) PUT2(t) break;
case 0x07: /* OVR */ t=T;n=N; SET(2, 1) PUT1(n) PUT1(t) PUT1(n) break;
case 0x27: /* OVR2 */ t=T2;n=N2; SET(4, 2) PUT2(n) PUT2(t) PUT2(n) break;
case 0x04: /* SWP */ t=T;n=N; SET(2, 0) PUT1x2(n, t) break;
case 0x24: /* SWP2 */ t=T2;n=N2; SET(4, 0) PUT2x2(n, t) break;
case 0x05: /* ROT */ t=T;n=N;l=L; SET(3, 0) PUT1x3(l, t, n) break;
case 0x25: /* ROT2 */ t=T2;n=N2;l=L2; SET(6, 0) PUT2x3(l, t, n) break;
case 0x06: /* DUP */ t=T; SET(1, 1) PUT1x2(t, t) break;
case 0x26: /* DUP2 */ t=T2; SET(2, 2) PUT2x2(t, t) break;
case 0x07: /* OVR */ t=T;n=N; SET(2, 1) PUT1x3(n, t, n) break;
case 0x27: /* OVR2 */ t=T2;n=N2; SET(4, 2) PUT2x3(n, t, n) break;
case 0x08: /* EQU */ t=T;n=N; SET(2,-1) PUT1(n == t) break;
case 0x28: /* EQU2 */ t=T2;n=N2; SET(4,-3) PUT1(n == t) break;
case 0x09: /* NEQ */ t=T;n=N; SET(2,-1) PUT1(n != t) break;
@ -94,7 +98,7 @@ uxn_eval(Uxn *u, Uint16 pc)
case 0x15: /* STA */ t=T2;n=L; SET(3,-3) ram[t] = n; break;
case 0x35: /* STA2 */ t=T2;n=N2; SET(4,-4) POKE2(ram + t, n) break;
case 0x16: /* DEI */ t=T; SET(1, 0) PUT1(DEI(t)) break;
case 0x36: /* DEI2 */ t=T; SET(1, 1) PUT1(DEI(t + 1)) PUT1(DEI(t)) break;
case 0x36: /* DEI2 */ t=T; SET(1, 1) PUT1x2(DEI(t + 1), DEI(t)) break;
case 0x17: /* DEO */ t=T;n=N; SET(2,-2) DEO(t, n) break;
case 0x37: /* DEO2 */ t=T;n=N;l=L; SET(3,-3) DEO(t, l) DEO((t + 1), n) break;
case 0x18: /* ADD */ t=T;n=N; SET(2,-1) PUT1(n + t) break;