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author | Bad Diode <bd@badd10de.dev> | 2023-08-30 20:31:08 +0200 |
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committer | Bad Diode <bd@badd10de.dev> | 2023-08-30 20:31:08 +0200 |
commit | 874ae39b6074da2778b72bcbaf6c7c7ef19aa233 (patch) | |
tree | 5ed5989ac78df0fea75c88c0b63f9a1a5ead6f53 /src/uxn.c | |
parent | be57c62f4633623005b5ac463ce7f65e8761d9bd (diff) | |
download | uxngba-874ae39b6074da2778b72bcbaf6c7c7ef19aa233.tar.gz uxngba-874ae39b6074da2778b72bcbaf6c7c7ef19aa233.zip |
Remove previous uxn core
Diffstat (limited to 'src/uxn.c')
-rw-r--r-- | src/uxn.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/src/uxn.c b/src/uxn.c deleted file mode 100644 index d525ff1..0000000 --- a/src/uxn.c +++ /dev/null | |||
@@ -1,117 +0,0 @@ | |||
1 | #include "uxn.h" | ||
2 | |||
3 | /* | ||
4 | Copyright (u) 2022-2023 Devine Lu Linvega, Andrew Alderwick, Andrew Richards | ||
5 | |||
6 | Permission to use, copy, modify, and distribute this software for any | ||
7 | purpose with or without fee is hereby granted, provided that the above | ||
8 | copyright notice and this permission notice appear in all copies. | ||
9 | |||
10 | THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
11 | WITH REGARD TO THIS SOFTWARE. | ||
12 | */ | ||
13 | |||
14 | #define T s->dat[s->ptr - 1] | ||
15 | #define N s->dat[s->ptr - 2] | ||
16 | #define L s->dat[s->ptr - 3] | ||
17 | #define H2 PEEK2(s->dat + s->ptr - 3) | ||
18 | #define T2 PEEK2(s->dat + s->ptr - 2) | ||
19 | #define N2 PEEK2(s->dat + s->ptr - 4) | ||
20 | #define L2 PEEK2(s->dat + s->ptr - 6) | ||
21 | |||
22 | /* Registers | ||
23 | |||
24 | [ . ][ . ][ . ][ L ][ N ][ T ] < | ||
25 | [ . ][ . ][ . ][ H2 ][ T ] < | ||
26 | [ L2 ][ N2 ][ T2 ] < | ||
27 | |||
28 | */ | ||
29 | |||
30 | |||
31 | u16 deo_mask[] = {0xff08, 0x0300, 0xc028, 0x8000, 0x8000, 0x8000, 0x8000, 0x0000, 0x0000, 0x0000, 0xa260, 0xa260, 0x0000, 0x0000, 0x0000, 0x0000}; | ||
32 | u16 dei_mask[] = {0x0000, 0x0000, 0x003c, 0x0014, 0x0014, 0x0014, 0x0014, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x07ff, 0x0000, 0x0000, 0x0000}; | ||
33 | |||
34 | #define POKE2(d, v) { (d)[0] = (v) >> 8; (d)[1] = (v); } | ||
35 | #define PEEK2(d) ((d)[0] << 8 | (d)[1]) | ||
36 | #define HALT(c) { return uxn_halt(u, ins, (c), pc - 1); } | ||
37 | #define SET(mul, add) { if(mul > s->ptr) HALT(1) tmp = s->ptr + k * mul + add; if(tmp > 254) HALT(2) s->ptr = tmp; } | ||
38 | #define PUT(o, v) { s->dat[(u8)(s->ptr - 1 - (o))] = (v); } | ||
39 | #define PUT2(o, v) { tmp = (v); s->dat[(u8)(s->ptr - o - 2)] = tmp >> 8; s->dat[(u8)(s->ptr - o - 1)] = tmp; } | ||
40 | #define PUSH(stack, v) { if(s->ptr > 254) HALT(2) stack->dat[stack->ptr++] = (v); } | ||
41 | #define PUSH2(stack, v) { if(s->ptr > 253) HALT(2) tmp = (v); stack->dat[stack->ptr] = tmp >> 8; stack->dat[stack->ptr + 1] = tmp; stack->ptr += 2; } | ||
42 | #define DEO(a, b) { u->dev[(a)] = (b); if((deo_mask[(a) >> 4] >> ((a) & 0xf)) & 0x1) uxn_deo(u, (a)); } | ||
43 | #define DEI(a, b) { PUT((a), ((dei_mask[(b) >> 4] >> ((b) & 0xf)) & 0x1) ? uxn_dei(u, (b)) : u->dev[(b)]) } | ||
44 | |||
45 | IWRAM_CODE | ||
46 | int | ||
47 | uxn_eval(Uxn *u, u16 pc) { | ||
48 | u8 ins, opc, k; | ||
49 | u16 t, n, l, tmp; | ||
50 | Stack *s; | ||
51 | if(!pc || u->dev[0x0f]) return 0; | ||
52 | for(;;) { | ||
53 | ins = u->ram[pc++]; | ||
54 | k = !!(ins & 0x80); | ||
55 | s = ins & 0x40 ? u->rst : u->wst; | ||
56 | opc = !(ins & 0x1f) ? 0 - (ins >> 5) : ins & 0x3f; | ||
57 | switch(opc) { | ||
58 | /* IMM */ | ||
59 | case 0x00: /* BRK */ return 1; | ||
60 | case 0xff: /* JCI */ pc += !!s->dat[--s->ptr] * PEEK2(u->ram + pc) + 2; break; | ||
61 | case 0xfe: /* JMI */ pc += PEEK2(u->ram + pc) + 2; break; | ||
62 | case 0xfd: /* JSI */ PUSH2(u->rst, pc + 2) pc += PEEK2(u->ram + pc) + 2; break; | ||
63 | case 0xfc: /* LIT */ PUSH(s, u->ram[pc++]) break; | ||
64 | case 0xfb: /* LIT2 */ PUSH2(s, PEEK2(u->ram + pc)) pc += 2; break; | ||
65 | case 0xfa: /* LITr */ PUSH(s, u->ram[pc++]) break; | ||
66 | case 0xf9: /* LIT2r */ PUSH2(s, PEEK2(u->ram + pc)) pc += 2; break; | ||
67 | /* ALU */ | ||
68 | case 0x01: /* INC */ t=T; SET(1, 0) PUT(0, t + 1) break; case 0x21: t=T2; SET(2, 0) PUT2(0, t + 1) break; | ||
69 | case 0x02: /* POP */ SET(1,-1) break; case 0x22: SET(2,-2) break; | ||
70 | case 0x03: /* NIP */ t=T; SET(2,-1) PUT(0, t) break; case 0x23: t=T2; SET(4,-2) PUT2(0, t) break; | ||
71 | case 0x04: /* SWP */ t=T;n=N; SET(2, 0) PUT(0, n) PUT(1, t) break; case 0x24: t=T2;n=N2; SET(4, 0) PUT2(0, n) PUT2(2, t) break; | ||
72 | case 0x05: /* ROT */ t=T;n=N;l=L; SET(3, 0) PUT(0, l) PUT(1, t) PUT(2, n) break; case 0x25: t=T2;n=N2;l=L2; SET(6, 0) PUT2(0, l) PUT2(2, t) PUT2(4, n) break; | ||
73 | case 0x06: /* DUP */ t=T; SET(1, 1) PUT(0, t) PUT(1, t) break; case 0x26: t=T2; SET(2, 2) PUT2(0, t) PUT2(2, t) break; | ||
74 | case 0x07: /* OVR */ t=T;n=N; SET(2, 1) PUT(0, n) PUT(1, t) PUT(2, n) break; case 0x27: t=T2;n=N2; SET(4, 2) PUT2(0, n) PUT2(2, t) PUT2(4, n) break; | ||
75 | case 0x08: /* EQU */ t=T;n=N; SET(2,-1) PUT(0, n == t) break; case 0x28: t=T2;n=N2; SET(4,-3) PUT(0, n == t) break; | ||
76 | case 0x09: /* NEQ */ t=T;n=N; SET(2,-1) PUT(0, n != t) break; case 0x29: t=T2;n=N2; SET(4,-3) PUT(0, n != t) break; | ||
77 | case 0x0a: /* GTH */ t=T;n=N; SET(2,-1) PUT(0, n > t) break; case 0x2a: t=T2;n=N2; SET(4,-3) PUT(0, n > t) break; | ||
78 | case 0x0b: /* LTH */ t=T;n=N; SET(2,-1) PUT(0, n < t) break; case 0x2b: t=T2;n=N2; SET(4,-3) PUT(0, n < t) break; | ||
79 | case 0x0c: /* JMP */ t=T; SET(1,-1) pc += (s8)t; break; case 0x2c: t=T2; SET(2,-2) pc = t; break; | ||
80 | case 0x0d: /* JCN */ t=T;n=N; SET(2,-2) pc += !!n * (s8)t; break; case 0x2d: t=T2;n=L; SET(3,-3) if(n) pc = t; break; | ||
81 | case 0x0e: /* JSR */ t=T; SET(1,-1) PUSH2(u->rst, pc) pc += (s8)t; break; case 0x2e: t=T2; SET(2,-2) PUSH2(u->rst, pc) pc = t; break; | ||
82 | case 0x0f: /* STH */ t=T; SET(1,-1) PUSH((ins & 0x40 ? u->wst : u->rst), t) break; case 0x2f: t=T2; SET(2,-2) PUSH2((ins & 0x40 ? u->wst : u->rst), t) break; | ||
83 | case 0x10: /* LDZ */ t=T; SET(1, 0) PUT(0, u->ram[t]) break; case 0x30: t=T; SET(1, 1) PUT2(0, PEEK2(u->ram + t)) break; | ||
84 | case 0x11: /* STZ */ t=T;n=N; SET(2,-2) u->ram[t] = n; break; case 0x31: t=T;n=H2; SET(3,-3) POKE2(u->ram + t, n) break; | ||
85 | case 0x12: /* LDR */ t=T; SET(1, 0) PUT(0, u->ram[pc + (s8)t]) break; case 0x32: t=T; SET(1, 1) PUT2(0, PEEK2(u->ram + pc + (s8)t)) break; | ||
86 | case 0x13: /* STR */ t=T;n=N; SET(2,-2) u->ram[pc + (s8)t] = n; break; case 0x33: t=T;n=H2; SET(3,-3) POKE2(u->ram + pc + (s8)t, n) break; | ||
87 | case 0x14: /* LDA */ t=T2; SET(2,-1) PUT(0, u->ram[t]) break; case 0x34: t=T2; SET(2, 0) PUT2(0, PEEK2(u->ram + t)) break; | ||
88 | case 0x15: /* STA */ t=T2;n=L; SET(3,-3) u->ram[t] = n; break; case 0x35: t=T2;n=N2; SET(4,-4) POKE2(u->ram + t, n) break; | ||
89 | case 0x16: /* DEI */ t=T; SET(1, 0) DEI(0, t) break; case 0x36: t=T; SET(1, 1) DEI(1, t) DEI(0, t + 1) break; | ||
90 | case 0x17: /* DEO */ t=T;n=N; SET(2,-2) DEO(t, n) break; case 0x37: t=T;n=N;l=L; SET(3,-3) DEO(t, l) DEO(t + 1, n) break; | ||
91 | case 0x18: /* ADD */ t=T;n=N; SET(2,-1) PUT(0, n + t) break; case 0x38: t=T2;n=N2; SET(4,-2) PUT2(0, n + t) break; | ||
92 | case 0x19: /* SUB */ t=T;n=N; SET(2,-1) PUT(0, n - t) break; case 0x39: t=T2;n=N2; SET(4,-2) PUT2(0, n - t) break; | ||
93 | case 0x1a: /* MUL */ t=T;n=N; SET(2,-1) PUT(0, n * t) break; case 0x3a: t=T2;n=N2; SET(4,-2) PUT2(0, n * t) break; | ||
94 | case 0x1b: /* DIV */ t=T;n=N; SET(2,-1) PUT(0, n / t) break; case 0x3b: t=T2;n=N2; SET(4,-2) PUT2(0, n / t) break; | ||
95 | case 0x1c: /* AND */ t=T;n=N; SET(2,-1) PUT(0, n & t) break; case 0x3c: t=T2;n=N2; SET(4,-2) PUT2(0, n & t) break; | ||
96 | case 0x1d: /* ORA */ t=T;n=N; SET(2,-1) PUT(0, n | t) break; case 0x3d: t=T2;n=N2; SET(4,-2) PUT2(0, n | t) break; | ||
97 | case 0x1e: /* EOR */ t=T;n=N; SET(2,-1) PUT(0, n ^ t) break; case 0x3e: t=T2;n=N2; SET(4,-2) PUT2(0, n ^ t) break; | ||
98 | case 0x1f: /* SFT */ t=T;n=N; SET(2,-1) PUT(0, n >> (t & 0xf) << (t >> 4)) break; case 0x3f: t=T;n=H2; SET(3,-1) PUT2(0, n >> (t & 0xf) << (t >> 4)) break; | ||
99 | } | ||
100 | } | ||
101 | } | ||
102 | |||
103 | int | ||
104 | uxn_boot(Uxn *u, u8 *ram, Dei *dei, Deo *deo) | ||
105 | { | ||
106 | u32 i; | ||
107 | char *cptr = (char *)u; | ||
108 | for(i = 0; i < sizeof(*u); i++) | ||
109 | cptr[i] = 0x00; | ||
110 | u->wst = (Stack *)(ram + 0x10000); | ||
111 | u->rst = (Stack *)(ram + 0x10100); | ||
112 | u->dev = (u8 *)(ram + 0x10200); | ||
113 | u->ram = ram; | ||
114 | u->dei = dei; | ||
115 | u->deo = deo; | ||
116 | return 1; | ||
117 | } | ||