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[Chiptunes.git] / fakeasm.h
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1#define c3(x) (0xff & (x>>24))
2#define c2(x) (0xff & (x>>16))
3#define c1(x) (0xff & (x>> 8))
4#define c0(x) (0xff & (x ))
5#define LSL(x) carry = x>>7; x <<= 1;
6#define LSR(x) carry = x&1; x >>= 1;
7#define SWAP(x) x = ((x & 0x0F) << 4 | (x & 0xF0) >> 4);
8#define AND(x,y) x &= y;
9#define ANDI(x,n) x &= n;
10#define OR(x,y) x |= y;
11#define ORI(x,n) x |= n;
12#define EOR(x,y) x ^= y;
13#define ADD(x,y) carry = (x+y)>>8; x += y;
14#define ADC(x,y,c)x += y; x+=c; //TODO: carry
15#define SUB(x,y) x -= y; //TODO: carry
16#define SUBI(x,n) x -= (u8)n; //TODO: carry
17#define INC(x) x++; //WARN: does not set carry
18#define DEC(x) x--; sr_zero=!x;
19#define MOV(x,y) x = y;
20#define LDI(x,n) x = n;
21#define SBRC(x,b) if (x & 1<<b) //skip if cleared => do if set
22#define SBRS(x,b) if (!(x & 1<<b)) //skip if set => do if not
23#define CLR(x) x = 0;
24#define RET return;
25#define RCALL //pseudo
26int sr_zero = 0; //status register zero bit
27#define TST(x) if(x==0)sr_zero=1;else sr_zero=0; //WARN: not a complete TST mockup
28#define BREQ(l) if(sr_zero) goto l;
29#define BRNE(l) if(!sr_zero) goto l;
30int carry = 0; //status register carry bit //WARN: not respected by all mocked instructions
31int asmtmp = 0;
32#define ROL(x) asmtmp = x>>7; x <<= 1; x |= carry; carry = asmtmp;
33#define ROR(x) asmtmp = x&0x1; x >>= 1; x |= carry<<7; carry = asmtmp;
34#define NEG(x) x *= -1;
35int sr_neg = 0;
36#define CPI(x,n) sr_neg = (x-n < 0);sr_zero = (x-n == 0); //WARN: not a complete CPI mockup
37#define BRPL(l) if (sr_neg) goto l;
38#define RJMP(l) goto l;
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