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Improved core

This commit is contained in:
Devine Lu Linvega 2024-01-10 17:26:29 -08:00
parent 69cc92496d
commit e247b86471
2 changed files with 5 additions and 8 deletions
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2
makefile
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@ -13,7 +13,7 @@ dest:
@ mkdir -p bin
rom:
@ ./bin/uxnasm etc/screen.bounds.tal bin/screen.bounds.rom
run: bin/uxnasm bin/uxncli bin/uxn11 rom
run: all bin/uxnasm bin/uxncli bin/uxn11 rom
@ ./bin/uxn11 bin/screen.bounds.rom
test: bin/uxnasm bin/uxncli bin/uxn11
@ ./bin/uxnasm && ./bin/uxncli && ./bin/uxn11 && ./bin/uxnasm -v && ./bin/uxncli -v && ./bin/uxn11 -v

11
src/uxn.c
View File

@ -35,19 +35,16 @@ uxn_eval(Uxn *u, Uint16 pc)
Stack *s = ins & 0x40 ? &u->rst : &u->wst;
if(ins & 0x80) kp = s->ptr, sp = &kp;
else sp = &s->ptr;
/* OPC */
switch(ins & 0x1f) {
/* IMM */
case 0x00: case 0x20:
switch(ins) {
case 0x00: /* BRK */ return 1;
case 0x20: /* JCI */ POP1(b) if(!b) { pc += 2; break; } /* fall-through */
case 0x40: /* JMI */ pc += PEEK2(ram + pc) + 2; break;
case 0x60: /* JSI */ PUSH2(pc + 2) pc += PEEK2(ram + pc) + 2; break;
case 0x20: /* JCI */ POP1(b) if(!b) { pc += 2; break; }
case 0x40: /* JMI */ a = ram[pc++] << 8 | ram[pc++]; pc += a; break;
case 0x60: /* JSI */ PUSH2(pc + 2) a = ram[pc++] << 8 | ram[pc++]; pc += a; break;
case 0x80: case 0xc0: /* LIT */ PUSH1(ram[pc++]) break;
case 0xa0: case 0xe0: /* LIT2 */ PUSH1(ram[pc++]) PUSH1(ram[pc++]) break;
} 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;
@ -73,7 +70,7 @@ uxn_eval(Uxn *u, Uint16 pc)
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 0x1a: /* MUL */ POPx(a) POPx(b) PUSHx(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;