OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.c-torture/] [compile/] [950612-1.c] - Blame information for rev 859

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 297 jeremybenn 
typedef enum
2 
{
3 
  LODI,
4 
  STO,
5 
  ADDI,
6 
  ADD,
7 
  SUBI,
8 
  SUB,
9 
  MULI,
10 
  MUL,
11 
  DIVI,
12 
  DIV,
13 
  INC,
14 
  DEC
15 
} INSN;
16 
 
17 
f (pc)
18 
     short *pc;
19 
{
20 
  long long stack[16], *sp = &stack[16], acc = 0;
21 
 
22 
  for (;;)
23 
    {
24 
      switch ((INSN)*pc++)
25 
        {
26 
        case LODI:
27 
          *--sp = acc;
28 
          acc = ((long long)*pc++) << 32;
29 
          break;
30 
        case STO:
31 
          return (acc >> 32) + (((((unsigned long long) acc) & 0xffffffff)  & (1 << 31)) != 0);
32 
          break;
33 
        case ADDI:
34 
          acc += ((long long)*pc++) << 32;
35 
          break;
36 
        case ADD:
37 
          acc = *sp++ + acc;
38 
          break;
39 
        case SUBI:
40 
          acc -= ((long long)*pc++) << 32;
41 
          break;
42 
        case SUB:
43 
          acc = *sp++ - acc;
44 
          break;
45 
        case MULI:
46 
          acc *= *pc++;
47 
          break;
48 
        case MUL:
49 
          {
50 
            long long aux;
51 
            unsigned char minus;
52 
 
53 
            minus = 0;
54 
            aux = *sp++;
55 
            if (aux < 0)
56 
              {
57 
                minus = ~minus;
58 
                aux = -aux;
59 
              }
60 
            if (acc < 0)
61 
              {
62 
                minus = ~minus;
63 
                acc = -acc;
64 
              }
65 
            acc = ((((((unsigned long long) acc) & 0xffffffff)  * (((unsigned long long) aux) & 0xffffffff)) >> 32)
66 
                   + ((((unsigned long long) acc) >> 32)  * (((unsigned long long) aux) & 0xffffffff)  + (((unsigned long long) acc) & 0xffffffff)  + (((unsigned long long) aux) >> 32))
67 
                   + (((((unsigned long long) acc) >> 32)  * (((unsigned long long) aux) >> 32)) << 32));
68 
            if (minus)
69 
              acc = -acc;
70 
          }
71 
          break;
72 
        case DIVI:
73 
          {
74 
            short aux;
75 
 
76 
            aux = *pc++;
77 
            acc = (acc + aux / 2) / aux;
78 
          }
79 
          break;
80 
        case DIV:
81 
          {
82 
            long long aux;
83 
            unsigned char minus;
84 
 
85 
            minus = 0;
86 
            aux = *sp++;
87 
            if (aux < 0)
88 
              {
89 
                minus = ~minus;
90 
                aux = -aux;
91 
              }
92 
            if (acc < 0)
93 
              {
94 
                minus = ~minus;
95 
                acc = -acc;
96 
              }
97 
 
98 
            if (((unsigned long long)acc)  == 0)
99 
              acc = (unsigned long long)-1 / 2;
100 
            else if ((((unsigned long long) ((unsigned long long)acc)) & 0xffffffff)  == 0)
101 
              acc = ((unsigned long long)aux)  / (((unsigned long long) ((unsigned long long)acc)) >> 32);
102 
            else if ((((unsigned long long) ((unsigned long long)acc)) >> 32)  == 0)
103 
              acc = ((((unsigned long long)aux)  / ((unsigned long long)acc)) << 32)
104 
                + ((((unsigned long long)aux)  % ((unsigned long long)acc)) << 32) / ((unsigned long long)acc);
105 
            else
106 
              {
107 
                unsigned char shift;
108 
                unsigned long hi;
109 
 
110 
                shift = 32;
111 
                hi = (((unsigned long long) ((unsigned long long)acc)) >> 32);
112 
                do {
113 
                  if (hi & ((unsigned long)1 << (shift - 1)))
114 
                    break;
115 
                } while (--shift != 0);
116 
                printf("shift = %d\n", shift);
117 
                acc = ((((unsigned long long)aux)  / ((unsigned long long)acc)) << 32)
118 
                  + (((((unsigned long long)aux)  % ((unsigned long long)acc)) << (32 - shift)) + ((((unsigned long long)acc)  >> shift) / 2)) / (((unsigned long long)acc)  >> shift);
119 
              }
120 
 
121 
            if (minus)
122 
              acc = -acc;
123 
          }
124 
          break;
125 
        case INC:
126 
          acc += 1;
127 
          break;
128 
        case DEC:
129 
          acc -= 1;
130 
          break;
131 
        }
132 
      printf("%08lx.%08lx\n", (long)(((unsigned long long) acc) >> 32) , (long)(((unsigned long long) acc) & 0xffffffff));
133 
    }
134 
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.