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

(uxn.c) Removed need for stack pointer

This commit is contained in:
Devine Lu Linvega 2024-08-12 13:11:42 -07:00
parent 7d077eb2c6
commit 3a901ed0be
3 changed files with 58 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
src/uxn.c
View File

@ -11,29 +11,32 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
#define OPC(opc, body) {\
case 0x00|opc: {enum{_2=0,_r=0}; s = &uxn.wst, sp = &uxn.wst.ptr; body break;}\
case 0x20|opc: {enum{_2=1,_r=0}; s = &uxn.wst, sp = &uxn.wst.ptr; body break;}\
case 0x40|opc: {enum{_2=0,_r=1}; s = &uxn.rst, sp = &uxn.rst.ptr; body break;}\
case 0x60|opc: {enum{_2=1,_r=1}; s = &uxn.rst, sp = &uxn.rst.ptr; body break;}\
case 0x80|opc: {enum{_2=0,_r=0}; s = &uxn.wst, kp = uxn.wst.ptr, sp = &kp; body break;}\
case 0xa0|opc: {enum{_2=1,_r=0}; s = &uxn.wst, kp = uxn.wst.ptr, sp = &kp; body break;}\
case 0xc0|opc: {enum{_2=0,_r=1}; s = &uxn.rst, kp = uxn.rst.ptr, sp = &kp; body break;}\
case 0xe0|opc: {enum{_2=1,_r=1}; s = &uxn.rst, kp = uxn.rst.ptr, sp = &kp; body break;}\
#define OPC(opc, init, body) {\
case 0x00|opc: {enum{_2=0,_r=0}; init; body; break;}\
case 0x20|opc: {enum{_2=1,_r=0}; init; body; break;}\
case 0x40|opc: {enum{_2=0,_r=1}; init; body; break;}\
case 0x60|opc: {enum{_2=1,_r=1}; init; body; break;}\
case 0x80|opc: {enum{_2=0,_r=0}; k = uxn.wst.ptr; init; uxn.wst.ptr = k; body; break;}\
case 0xa0|opc: {enum{_2=1,_r=0}; k = uxn.wst.ptr; init; uxn.wst.ptr = k; body; break;}\
case 0xc0|opc: {enum{_2=0,_r=1}; k = uxn.rst.ptr; init; uxn.rst.ptr = k; body; break;}\
case 0xe0|opc: {enum{_2=1,_r=1}; k = uxn.rst.ptr; init; uxn.rst.ptr = k; body; break;}\
}
/* Microcode */
#define FLP { s = _r ? &uxn.wst : &uxn.rst; }
#define INC(s) uxn.s.dat[uxn.s.ptr++]
#define DEC(s) uxn.s.dat[--uxn.s.ptr]
#define JMI { pc += uxn.ram[pc++] << 8 | uxn.ram[pc++]; }
#define JMP(x) { if(_2) pc = (x); else pc += (Sint8)(x); }
#define POx(o) { if(_2) { PO2(o) } else PO1(o) }
#define PO1(o) { o = s->dat[--*sp]; }
#define PO2(o) { o = s->dat[--*sp] | (s->dat[--*sp] << 8); }
#define PO2(o) { if(_r) o = DEC(rst) | (DEC(rst) << 8); else o = DEC(wst) | (DEC(wst) << 8); }
#define PO1(o) { if(_r) o = DEC(rst); else o = DEC(wst); }
#define PUx(y) { if(_2) { PU2(y) } else PU1(y) }
#define PU1(y) { s->dat[s->ptr++] = (y); }
#define PU2(y) { tt = (y); PU1(tt >> 8) PU1(tt) }
#define IMM(x, y) { uxn.x.dat[uxn.x.ptr++] = (y); }
#define PU1(y) { if(_r) INC(rst) = y; else INC(wst) = y; }
#define PFx(y) { if(_2) { PF2(y) } else PF1(y) }
#define PF2(y) { tt = (y); PF1(tt >> 8) PF1(tt) }
#define PF1(y) { if(_r) INC(wst) = y; else INC(rst) = y; }
#define DEI(p, o) { if(_2) { o = (emu_dei(p) << 8) | emu_dei(p + 1); } else o = emu_dei(p); }
#define DEO(p, y) { if(_2) { emu_deo(p, y >> 8), emu_deo(p + 1, y); } else emu_deo(p, y); }
#define PEK(o, x, r) { if(_2) { r = (x); o = uxn.ram[r++] << 8 | uxn.ram[r]; } else o = uxn.ram[(x)]; }
@ -42,52 +45,51 @@ WITH REGARD TO THIS SOFTWARE.
int
uxn_eval(Uint16 pc)
{
int a,b,c;
Uint8 t, kp, *sp;
int a,b,c,k;
Uint8 t;
Uint16 tt;
Stack *s;
if(!pc || uxn.dev[0x0f]) return 0;
for(;;) {
switch(uxn.ram[pc++]) {
/* BRK */ case 0x00: return 1;
/* JCI */ case 0x20: if(uxn.wst.dat[--uxn.wst.ptr]) { JMI break; } pc += 2; break;
/* JCI */ case 0x20: if(DEC(wst)) { JMI break; } pc += 2; break;
/* JMI */ case 0x40: JMI break;
/* JSI */ case 0x60: tt = pc + 2; IMM(rst, tt >> 8) IMM(rst, tt) JMI break;
/* LI2 */ case 0xa0: IMM(wst, uxn.ram[pc++])
/* LIT */ case 0x80: IMM(wst, uxn.ram[pc++]) break;
/* L2r */ case 0xe0: IMM(rst, uxn.ram[pc++])
/* LIr */ case 0xc0: IMM(rst, uxn.ram[pc++]) break;
/* INC */ OPC(0x01, POx(a) PUx(a + 1))
/* POP */ OPC(0x02, POx(a))
/* NIP */ OPC(0x03, POx(a) POx(b) PUx(a))
/* SWP */ OPC(0x04, POx(a) POx(b) PUx(a) PUx(b))
/* ROT */ OPC(0x05, POx(a) POx(b) POx(c) PUx(b) PUx(a) PUx(c))
/* DUP */ OPC(0x06, POx(a) PUx(a) PUx(a))
/* OVR */ OPC(0x07, POx(a) POx(b) PUx(b) PUx(a) PUx(b))
/* EQU */ OPC(0x08, POx(a) POx(b) PU1(b == a))
/* NEQ */ OPC(0x09, POx(a) POx(b) PU1(b != a))
/* GTH */ OPC(0x0a, POx(a) POx(b) PU1(b > a))
/* LTH */ OPC(0x0b, POx(a) POx(b) PU1(b < a))
/* JMP */ OPC(0x0c, POx(a) JMP(a))
/* JCN */ OPC(0x0d, POx(a) PO1(b) if(b) JMP(a))
/* JSR */ OPC(0x0e, POx(a) FLP PU2(pc) JMP(a))
/* STH */ OPC(0x0f, POx(a) FLP PUx(a))
/* LDZ */ OPC(0x10, PO1(a) PEK(b, a, t) PUx(b))
/* STZ */ OPC(0x11, PO1(a) POx(b) POK(a, b, t))
/* LDR */ OPC(0x12, PO1(a) PEK(b, pc + (Sint8)a, tt) PUx(b))
/* STR */ OPC(0x13, PO1(a) POx(b) POK(pc + (Sint8)a, b, tt))
/* LDA */ OPC(0x14, PO2(a) PEK(b, a, tt) PUx(b))
/* STA */ OPC(0x15, PO2(a) POx(b) POK(a, b, tt))
/* DEI */ OPC(0x16, PO1(a) DEI(a, b) PUx(b))
/* DEO */ OPC(0x17, PO1(a) POx(b) DEO(a, b))
/* ADD */ OPC(0x18, POx(a) POx(b) PUx(b + a))
/* SUB */ OPC(0x19, POx(a) POx(b) PUx(b - a))
/* MUL */ OPC(0x1a, POx(a) POx(b) PUx(b * a))
/* DIV */ OPC(0x1b, POx(a) POx(b) PUx(a ? b / a : 0))
/* AND */ OPC(0x1c, POx(a) POx(b) PUx(b & a))
/* ORA */ OPC(0x1d, POx(a) POx(b) PUx(b | a))
/* EOR */ OPC(0x1e, POx(a) POx(b) PUx(b ^ a))
/* SFT */ OPC(0x1f, PO1(a) POx(b) PUx(b >> (a & 0xf) << (a >> 4)))
/* JSI */ case 0x60: tt = pc + 2; INC(rst) = tt >> 8; INC(rst) = tt; JMI break;
/* LI2 */ case 0xa0: INC(wst) = uxn.ram[pc++];
/* LIT */ case 0x80: INC(wst) = uxn.ram[pc++]; break;
/* L2r */ case 0xe0: INC(rst) = uxn.ram[pc++];
/* LIr */ case 0xc0: INC(rst) = uxn.ram[pc++]; break;
/* INC */ OPC(0x01, POx(a), PUx(a + 1))
/* POP */ OPC(0x02, POx(a), 0)
/* NIP */ OPC(0x03, POx(a) POx(b), PUx(a))
/* SWP */ OPC(0x04, POx(a) POx(b), PUx(a) PUx(b))
/* ROT */ OPC(0x05, POx(a) POx(b) POx(c), PUx(b) PUx(a) PUx(c))
/* DUP */ OPC(0x06, POx(a), PUx(a) PUx(a))
/* OVR */ OPC(0x07, POx(a) POx(b), PUx(b) PUx(a) PUx(b))
/* EQU */ OPC(0x08, POx(a) POx(b), PU1(b == a))
/* NEQ */ OPC(0x09, POx(a) POx(b), PU1(b != a))
/* GTH */ OPC(0x0a, POx(a) POx(b), PU1(b > a))
/* LTH */ OPC(0x0b, POx(a) POx(b), PU1(b < a))
/* JMP */ OPC(0x0c, POx(a), JMP(a))
/* JCN */ OPC(0x0d, POx(a) PO1(b), if(b) JMP(a))
/* JSR */ OPC(0x0e, POx(a), PF2(pc) JMP(a))
/* STH */ OPC(0x0f, POx(a), PFx(a))
/* LDZ */ OPC(0x10, PO1(a), PEK(b, a, t) PUx(b))
/* STZ */ OPC(0x11, PO1(a) POx(b), POK(a, b, t))
/* LDR */ OPC(0x12, PO1(a), PEK(b, pc + (Sint8)a, tt) PUx(b))
/* STR */ OPC(0x13, PO1(a) POx(b), POK(pc + (Sint8)a, b, tt))
/* LDA */ OPC(0x14, PO2(a), PEK(b, a, tt) PUx(b))
/* STA */ OPC(0x15, PO2(a) POx(b), POK(a, b, tt))
/* DEI */ OPC(0x16, PO1(a), DEI(a, b) PUx(b))
/* DEO */ OPC(0x17, PO1(a) POx(b), DEO(a, b))
/* ADD */ OPC(0x18, POx(a) POx(b), PUx(b + a))
/* SUB */ OPC(0x19, POx(a) POx(b), PUx(b - a))
/* MUL */ OPC(0x1a, POx(a) POx(b), PUx(b * a))
/* DIV */ OPC(0x1b, POx(a) POx(b), PUx(a ? b / a : 0))
/* AND */ OPC(0x1c, POx(a) POx(b), PUx(b & a))
/* ORA */ OPC(0x1d, POx(a) POx(b), PUx(b | a))
/* EOR */ OPC(0x1e, POx(a) POx(b), PUx(b ^ a))
/* SFT */ OPC(0x1f, PO1(a) POx(b), PUx(b >> (a & 0xf) << (a >> 4)))
}
}
}

2
src/uxncli.c
View File

@ -68,7 +68,7 @@ main(int argc, char **argv)
int i = 1;
char *rom;
if(i != argc && argv[i][0] == '-' && argv[i][1] == 'v') {
fprintf(stdout, "Uxncli - Console Varvara Emulator, 11 Aug 2024.\n");
fprintf(stdout, "Uxncli - Console Varvara Emulator, 12 Aug 2024.\n");
i++;
}
rom = i == argc ? "boot.rom" : argv[i++];

2
src/uxnemu.c
View File

@ -466,7 +466,7 @@ main(int argc, char **argv)
/* flags */
if(argc > 1 && argv[i][0] == '-') {
if(!strcmp(argv[i], "-v"))
return system_error("Uxnemu - Varvara Emulator(GUI)", "11 Aug 2024.");
return system_error("Uxnemu - Varvara Emulator(GUI)", "12 Aug 2024.");
else if(!strcmp(argv[i], "-2x"))
set_zoom(2, 0);
else if(!strcmp(argv[i], "-3x"))