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emu_deo() writes in memory

This commit is contained in:
neauoire 2023-10-31 09:00:02 -07:00
parent d439d0a45d
commit 90c3a25792
4 changed files with 77 additions and 109 deletions
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165
src/uxn.c
View File

@ -11,114 +11,77 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE.
*/
/* Registers
[ Z ][ Y ][ X ][ L ][ N ][ T ] <
[ . ][ . ][ . ][ H2 ][ T ] <
[ L2 ][ N2 ][ T2 ] <
*/
#define T *(ptr)
#define N *(ptr - 1)
#define L *(ptr - 2)
#define X *(ptr - 3)
#define Y *(ptr - 4)
#define Z *(ptr - 5)
#define T2 (N << 8 | T)
#define H2 (L << 8 | N)
#define N2 (X << 8 | L)
#define L2 (Z << 8 | Y)
#define T2_(v) { r = (v); T = r; N = r >> 8; }
#define N2_(v) { r = (v); L = r; X = r >> 8; }
#define L2_(v) { r = (v); Y = r; Z = r >> 8; }
#define DEI(p) (dei_masks[p] ? emu_dei(u, (p)) : u->dev[(p)])
#define DEO(p, v) { u->dev[p] = v; if(deo_masks[p]) emu_deo(u, p); }
#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; }
#define SHIFT(y) { s->ptr += (y); ptr = s->dat + s->ptr - 1; }
#define SET(x, y) { SHIFT((ins & 0x80) ? x + y : y) }
#define FLIP { s = ins & 0x40 ? &u->wst : &u->rst; }
#define JUMP(x) { if(m2) pc = (x); else pc += (Sint8)(x); }
#define POKE(x, y) { if(m2) { POKE2(ram + x, y) } else ram[(x)] = (y); }
#define PEEK(o, x) { if(m2) { o = PEEK2(ram + x); } else o = ram[(x)]; }
#define DEVR(o, p) { if(m2) { o = ((emu_dei(u, p) << 8) + emu_dei(u, p + 1)); } else o = emu_dei(u, p); }
#define DEVW(p, y) { if(m2) { emu_deo(u, p, y >> 8); emu_deo(u, p + 1, y); } else emu_deo(u, p, y); }
#define PUSH1(y) { s->dat[s->ptr++] = (y); }
#define PUSH2(y) { t = (y); s->dat[s->ptr++] = t >> 0x8; s->dat[s->ptr++] = t & 0xff; }
#define PUSHx(y) { if(m2) { PUSH2(y) } else PUSH1(y) }
#define POP1(o) { o = s->dat[--*sp]; }
#define POP2(o) { o = s->dat[--*sp] | s->dat[--*sp] << 0x8; }
#define POPx(o) { if(m2) { POP2(o) } else POP1(o) }
int
uxn_eval(Uxn *u, Uint16 pc)
{
int t, n, l, r;
Uint8 *ram = u->ram, *rr;
Uint8 ksp, *sp, *ram = u->ram;
Uint16 a, b, c, t;
if(!pc || u->dev[0x0f]) return 0;
for(;;) {
int ins = ram[pc++];
Uint8 ins = ram[pc++], opc = ins & 0x1f;
Uint8 m2 = ins & 0x20;
Stack *s = ins & 0x40 ? &u->rst : &u->wst;
Uint8 *ptr = s->dat + s->ptr - 1;
switch(ins & 0x1f ? ins & 0x3f : ins << 4) {
/* IMM */
case 0x000: /* BRK */ return 1;
case 0x200: /* JCI */ t=T; SHIFT(-1) if(!t) { pc += 2; break; } /* else fallthrough */
case 0x400: /* JMI */ rr = ram + pc; pc += PEEK2(rr) + 2; break;
case 0x600: /* JSI */ SHIFT( 2) T2_(pc + 2); rr = ram + pc; pc += PEEK2(rr) + 2; break;
case 0x800: /* LIT */ case 0xc00: SHIFT( 1) T = ram[pc++]; break;
case 0xa00: /* LIT2 */ case 0xe00: SHIFT( 2) rr = ram + pc; T2_(PEEK2(rr)) pc += 2; break;
/* ALU */
case 0x01: /* INC */ t=T; SET(1, 0) T = t + 1; break;
case 0x21: /* INC2 */ t=T2; SET(2, 0) T2_(t + 1) break;
case 0x02: /* POP */ SET(1,-1) break;
case 0x22: /* POP2 */ SET(2,-2) break;
case 0x03: /* NIP */ t=T; SET(2,-1) T = t; break;
case 0x23: /* NIP2 */ t=T2; SET(4,-2) T2_(t) break;
case 0x04: /* SWP */ t=T;n=N; SET(2, 0) T = n; N = t; break;
case 0x24: /* SWP2 */ t=T2;n=N2; SET(4, 0) T2_(n) N2_(t) break;
case 0x05: /* ROT */ t=T;n=N;l=L; SET(3, 0) T = l; N = t; L = n; break;
case 0x25: /* ROT2 */ t=T2;n=N2;l=L2; SET(6, 0) T2_(l) N2_(t) L2_(n) break;
case 0x06: /* DUP */ t=T; SET(1, 1) T = t; N = t; break;
case 0x26: /* DUP2 */ t=T2; SET(2, 2) T2_(t) N2_(t) break;
case 0x07: /* OVR */ t=T;n=N; SET(2, 1) T = n; N = t; L = n; break;
case 0x27: /* OVR2 */ t=T2;n=N2; SET(4, 2) T2_(n) N2_(t) L2_(n) break;
case 0x08: /* EQU */ t=T;n=N; SET(2,-1) T = n == t; break;
case 0x28: /* EQU2 */ t=T2;n=N2; SET(4,-3) T = n == t; break;
case 0x09: /* NEQ */ t=T;n=N; SET(2,-1) T = n != t; break;
case 0x29: /* NEQ2 */ t=T2;n=N2; SET(4,-3) T = n != t; break;
case 0x0a: /* GTH */ t=T;n=N; SET(2,-1) T = n > t; break;
case 0x2a: /* GTH2 */ t=T2;n=N2; SET(4,-3) T = n > t; break;
case 0x0b: /* LTH */ t=T;n=N; SET(2,-1) T = n < t; break;
case 0x2b: /* LTH2 */ t=T2;n=N2; SET(4,-3) T = n < t; break;
case 0x0c: /* JMP */ t=T; SET(1,-1) pc += (Sint8)t; break;
case 0x2c: /* JMP2 */ t=T2; SET(2,-2) pc = t; break;
case 0x0d: /* JCN */ t=T;n=N; SET(2,-2) if(n) pc += (Sint8)t; break;
case 0x2d: /* JCN2 */ t=T2;n=L; SET(3,-3) if(n) pc = t; break;
case 0x0e: /* JSR */ t=T; SET(1,-1) FLIP SHIFT(2) T2_(pc) pc += (Sint8)t; break;
case 0x2e: /* JSR2 */ t=T2; SET(2,-2) FLIP SHIFT(2) T2_(pc) pc = t; break;
case 0x0f: /* STH */ t=T; SET(1,-1) FLIP SHIFT(1) T = t; break;
case 0x2f: /* STH2 */ t=T2; SET(2,-2) FLIP SHIFT(2) T2_(t) break;
case 0x10: /* LDZ */ t=T; SET(1, 0) T = ram[t]; break;
case 0x30: /* LDZ2 */ t=T; SET(1, 1) rr = ram + t; T2_(PEEK2(rr)) break;
case 0x11: /* STZ */ t=T;n=N; SET(2,-2) ram[t] = n; break;
case 0x31: /* STZ2 */ t=T;n=H2; SET(3,-3) rr = ram + t; POKE2(rr, n) break;
case 0x12: /* LDR */ t=T; SET(1, 0) T = ram[pc + (Sint8)t]; break;
case 0x32: /* LDR2 */ t=T; SET(1, 1) rr = ram + pc + (Sint8)t; T2_(PEEK2(rr)) break;
case 0x13: /* STR */ t=T;n=N; SET(2,-2) ram[pc + (Sint8)t] = n; break;
case 0x33: /* STR2 */ t=T;n=H2; SET(3,-3) rr = ram + pc + (Sint8)t; POKE2(rr, n) break;
case 0x14: /* LDA */ t=T2; SET(2,-1) T = ram[t]; break;
case 0x34: /* LDA2 */ t=T2; SET(2, 0) rr = ram + t; T2_(PEEK2(rr)) break;
case 0x15: /* STA */ t=T2;n=L; SET(3,-3) ram[t] = n; break;
case 0x35: /* STA2 */ t=T2;n=N2; SET(4,-4) rr = ram + t; POKE2(rr, n) break;
case 0x16: /* DEI */ t=T; SET(1, 0) T = DEI(t); break;
case 0x36: /* DEI2 */ t=T; SET(1, 1) T = DEI(t + 1); N = 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) T = n + t; break;
case 0x38: /* ADD2 */ t=T2;n=N2; SET(4,-2) T2_(n + t) break;
case 0x19: /* SUB */ t=T;n=N; SET(2,-1) T = n - t; break;
case 0x39: /* SUB2 */ t=T2;n=N2; SET(4,-2) T2_(n - t) break;
case 0x1a: /* MUL */ t=T;n=N; SET(2,-1) T = n * t; break;
case 0x3a: /* MUL2 */ t=T2;n=N2; SET(4,-2) T2_(n * t) break;
case 0x1b: /* DIV */ t=T;n=N; SET(2,-1) T = t ? n / t : 0; break;
case 0x3b: /* DIV2 */ t=T2;n=N2; SET(4,-2) T2_(t ? n / t : 0) break;
case 0x1c: /* AND */ t=T;n=N; SET(2,-1) T = n & t; break;
case 0x3c: /* AND2 */ t=T2;n=N2; SET(4,-2) T2_(n & t) break;
case 0x1d: /* ORA */ t=T;n=N; SET(2,-1) T = n | t; break;
case 0x3d: /* ORA2 */ t=T2;n=N2; SET(4,-2) T2_(n | t) break;
case 0x1e: /* EOR */ t=T;n=N; SET(2,-1) T = n ^ t; break;
case 0x3e: /* EOR2 */ t=T2;n=N2; SET(4,-2) T2_(n ^ t) break;
case 0x1f: /* SFT */ t=T;n=N; SET(2,-1) T = n >> (t & 0xf) << (t >> 4); break;
case 0x3f: /* SFT2 */ t=T;n=H2; SET(3,-1) T2_(n >> (t & 0xf) << (t >> 4)) break;
if(ins & 0x80) {
ksp = s->ptr;
sp = &ksp;
} else
sp = &s->ptr;
/* Opcodes */
switch(opc - (!opc * (ins >> 5))) {
/* 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 */ PUSH2(PEEK2(ram + pc)) pc += 2; break;
/* ALU */
case 0x01: /* INC */ POPx(a) PUSHx(a + 1) break;
case 0x02: /* POP */ POPx(a) break;
case 0x03: /* NIP */ POPx(a) POPx(b) PUSHx(a) break;
case 0x04: /* SWP */ POPx(a) POPx(b) PUSHx(a) PUSHx(b) break;
case 0x05: /* ROT */ POPx(a) POPx(b) POPx(c) PUSHx(b) PUSHx(a) PUSHx(c) break;
case 0x06: /* DUP */ POPx(a) PUSHx(a) PUSHx(a) break;
case 0x07: /* OVR */ POPx(a) POPx(b) PUSHx(b) PUSHx(a) PUSHx(b) break;
case 0x08: /* EQU */ POPx(a) POPx(b) PUSH1(b == a) break;
case 0x09: /* NEQ */ POPx(a) POPx(b) PUSH1(b != a) break;
case 0x0a: /* GTH */ POPx(a) POPx(b) PUSH1(b > a) break;
case 0x0b: /* LTH */ POPx(a) POPx(b) PUSH1(b < a) break;
case 0x0c: /* JMP */ POPx(a) JUMP(a) break;
case 0x0d: /* JCN */ POPx(a) POP1(b) if(b) JUMP(a) break;
case 0x0e: /* JSR */ POPx(a) FLIP PUSH2(pc) JUMP(a) break;
case 0x0f: /* STH */ POPx(a) FLIP PUSHx(a) break;
case 0x10: /* LDZ */ POP1(a) PEEK(b, a) PUSHx(b) break;
case 0x11: /* STZ */ POP1(a) POPx(b) POKE(a, b) break;
case 0x12: /* LDR */ POP1(a) PEEK(b, pc + (Sint8)a) PUSHx(b) break;
case 0x13: /* STR */ POP1(a) POPx(b) POKE(pc + (Sint8)a, b) break;
case 0x14: /* LDA */ POP2(a) PEEK(b, a) PUSHx(b) break;
case 0x15: /* STA */ POP2(a) POPx(b) POKE(a, b) break;
case 0x16: /* DEI */ POP1(a) DEVR(b, a) PUSHx(b) break;
case 0x17: /* DEO */ POP1(a) POPx(b) DEVW(a, b) break;
case 0x18: /* ADD */ POPx(a) POPx(b) PUSHx(b + a) break;
case 0x19: /* SUB */ POPx(a) POPx(b) PUSHx(b - a) break;
case 0x1a: /* MUL */ POPx(a) POPx(b) PUSHx((Uint32)b * a) break;
case 0x1b: /* DIV */ POPx(a) POPx(b) PUSHx(a ? b / a : 0) break;
case 0x1c: /* AND */ POPx(a) POPx(b) PUSHx(b & a) break;
case 0x1d: /* ORA */ POPx(a) POPx(b) PUSHx(b | a) break;
case 0x1e: /* EOR */ POPx(a) POPx(b) PUSHx(b ^ a) break;
case 0x1f: /* SFT */ POP1(a) POPx(b) PUSHx(b >> (a & 0xf) << (a >> 4)) break;
}
}
}

2
src/uxn.h
View File

@ -36,7 +36,7 @@ typedef struct Uxn {
/* required functions */
extern Uint8 emu_dei(Uxn *u, Uint8 addr);
extern void emu_deo(Uxn *u, Uint8 addr);
extern void emu_deo(Uxn *u, Uint8 addr, Uint8 value);
extern Uint8 dei_masks[0x100], deo_masks[0x100];
extern Uint16 dev_vers[0x10], dei_mask[0x10], deo_mask[0x10];

7
src/uxn11.c
View File

@ -56,9 +56,10 @@ emu_dei(Uxn *u, Uint8 addr)
}
void
emu_deo(Uxn *u, Uint8 addr)
emu_deo(Uxn *u, Uint8 addr, Uint8 value)
{
Uint8 p = addr & 0x0f, d = addr & 0xf0;
u->dev[addr] = value;
switch(d) {
case 0x00:
system_deo(u, &u->dev[d], p);
@ -254,7 +255,7 @@ emu_run(Uxn *u, char *rom)
int
main(int argc, char **argv)
{
Uxn u;
Uxn u = {0};
int i = 1;
if(i == argc)
return system_error("usage", "uxn11 [-v] file.rom [args...]");
@ -270,7 +271,7 @@ main(int argc, char **argv)
system_connect(0xf, LINK_VERSION, LINK_DEIMASK, LINK_DEOMASK);
/* Read flags */
if(argv[i][0] == '-' && argv[i][1] == 'v')
return system_version("Uxn11 - Graphical Varvara Emulator", "2 Sep 2023");
return system_version("Uxn11 - Graphical Varvara Emulator", "31 Oct 2023");
if(!emu_init())
return system_error("Init", "Failed to initialize varvara.");
if(!system_init(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++]))

12
src/uxncli.c
View File

@ -29,9 +29,10 @@ emu_dei(Uxn *u, Uint8 addr)
}
void
emu_deo(Uxn *u, Uint8 addr)
emu_deo(Uxn *u, Uint8 addr, Uint8 value)
{
Uint8 p = addr & 0x0f, d = addr & 0xf0;
u->dev[addr] = value;
switch(d) {
case 0x00: system_deo(u, &u->dev[d], p); break;
case 0x10: console_deo(&u->dev[d], p); break;
@ -45,7 +46,10 @@ emu_run(Uxn *u)
{
while(!u->dev[0x0f]) {
int c = fgetc(stdin);
if(c == EOF) { console_input(u, 0x00, CONSOLE_END); break; }
if(c == EOF) {
console_input(u, 0x00, CONSOLE_END);
break;
}
console_input(u, (Uint8)c, CONSOLE_STD);
}
}
@ -60,7 +64,7 @@ emu_end(Uxn *u)
int
main(int argc, char **argv)
{
Uxn u;
Uxn u = {0};
int i = 1;
if(i == argc)
return system_error("usage", "uxncli [-v] file.rom [args..]");
@ -72,7 +76,7 @@ main(int argc, char **argv)
system_connect(0xc, DATETIME_VERSION, DATETIME_DEIMASK, DATETIME_DEOMASK);
/* Read flags */
if(argv[i][0] == '-' && argv[i][1] == 'v')
return system_version("Uxncli - Console Varvara Emulator", "5 Sep 2023");
return system_version("Uxncli - Console Varvara Emulator", "30 Oct 2023");
if(!system_init(&u, (Uint8 *)calloc(0x10000 * RAM_PAGES, sizeof(Uint8)), argv[i++]))
return system_error("Init", "Failed to initialize uxn.");
/* Game Loop */