fakeasm.h

   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
  26 int 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;
  30 int carry = 0; //status register carry bit //WARN: not respected by all mocked instructions
  31 int 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;
  35 int 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;