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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.c-torture/] [compile/] [950612-1.c] - Blame information for rev 299

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Line No. Rev Author Line
1 297 jeremybenn 
typedef enum
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{
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  LODI,
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  STO,
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  ADDI,
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  ADD,
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  SUBI,
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  SUB,
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  MULI,
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  MUL,
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  DIVI,
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  DIV,
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  INC,
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  DEC
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} INSN;
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f (pc)
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     short *pc;
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{
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  long long stack[16], *sp = &stack[16], acc = 0;
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  for (;;)
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    {
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      switch ((INSN)*pc++)
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        {
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        case LODI:
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          *--sp = acc;
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          acc = ((long long)*pc++) << 32;
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          break;
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        case STO:
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          return (acc >> 32) + (((((unsigned long long) acc) & 0xffffffff)  & (1 << 31)) != 0);
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          break;
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        case ADDI:
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          acc += ((long long)*pc++) << 32;
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          break;
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        case ADD:
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          acc = *sp++ + acc;
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          break;
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        case SUBI:
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          acc -= ((long long)*pc++) << 32;
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          break;
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        case SUB:
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          acc = *sp++ - acc;
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          break;
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        case MULI:
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          acc *= *pc++;
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          break;
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        case MUL:
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          {
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            long long aux;
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            unsigned char minus;
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            minus = 0;
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            aux = *sp++;
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            if (aux < 0)
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              {
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                minus = ~minus;
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                aux = -aux;
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              }
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            if (acc < 0)
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              {
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                minus = ~minus;
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                acc = -acc;
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              }
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            acc = ((((((unsigned long long) acc) & 0xffffffff)  * (((unsigned long long) aux) & 0xffffffff)) >> 32)
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                   + ((((unsigned long long) acc) >> 32)  * (((unsigned long long) aux) & 0xffffffff)  + (((unsigned long long) acc) & 0xffffffff)  + (((unsigned long long) aux) >> 32))
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                   + (((((unsigned long long) acc) >> 32)  * (((unsigned long long) aux) >> 32)) << 32));
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            if (minus)
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              acc = -acc;
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          }
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          break;
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        case DIVI:
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          {
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            short aux;
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            aux = *pc++;
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            acc = (acc + aux / 2) / aux;
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          }
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          break;
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        case DIV:
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          {
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            long long aux;
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            unsigned char minus;
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            minus = 0;
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            aux = *sp++;
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            if (aux < 0)
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              {
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                minus = ~minus;
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                aux = -aux;
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              }
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            if (acc < 0)
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              {
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                minus = ~minus;
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                acc = -acc;
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              }
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            if (((unsigned long long)acc)  == 0)
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              acc = (unsigned long long)-1 / 2;
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            else if ((((unsigned long long) ((unsigned long long)acc)) & 0xffffffff)  == 0)
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              acc = ((unsigned long long)aux)  / (((unsigned long long) ((unsigned long long)acc)) >> 32);
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            else if ((((unsigned long long) ((unsigned long long)acc)) >> 32)  == 0)
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              acc = ((((unsigned long long)aux)  / ((unsigned long long)acc)) << 32)
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                + ((((unsigned long long)aux)  % ((unsigned long long)acc)) << 32) / ((unsigned long long)acc);
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            else
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              {
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                unsigned char shift;
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                unsigned long hi;
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                shift = 32;
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                hi = (((unsigned long long) ((unsigned long long)acc)) >> 32);
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                do {
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                  if (hi & ((unsigned long)1 << (shift - 1)))
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                    break;
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                } while (--shift != 0);
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                printf("shift = %d\n", shift);
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                acc = ((((unsigned long long)aux)  / ((unsigned long long)acc)) << 32)
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                  + (((((unsigned long long)aux)  % ((unsigned long long)acc)) << (32 - shift)) + ((((unsigned long long)acc)  >> shift) / 2)) / (((unsigned long long)acc)  >> shift);
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              }
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            if (minus)
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              acc = -acc;
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          }
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          break;
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        case INC:
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          acc += 1;
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          break;
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        case DEC:
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          acc -= 1;
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          break;
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        }
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      printf("%08lx.%08lx\n", (long)(((unsigned long long) acc) >> 32) , (long)(((unsigned long long) acc) & 0xffffffff));
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    }
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}

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