1 // PR rtl-optimization/40924
4 extern "C" void abort (void);
6 #define MAY_ALIAS __attribute__((__may_alias__))
8 typedef struct { float v[2]; } floata;
9 typedef struct { int v[2]; } inta;
11 typedef unsigned int uint MAY_ALIAS;
12 typedef signed int sint MAY_ALIAS;
13 typedef float flt MAY_ALIAS;
15 static inline unsigned short
16 less_than (inta a, inta b)
19 const uint *p1 = (const uint *) &a;
20 const uint *p2 = (const uint *) &b;
21 for (int i=0; i < 2; i++)
22 if (p1[i] < p2[i]) r |= (1 << i);
27 multiply (inta b, inta c)
30 sint *p3 = (sint *) &c;
31 for (int i=0; i < 2; i++)
32 r.v[i] = (int) (b.v[i] * p3[i] & 0xFFFFFFFF);
37 gather (inta indexes, const void *baseAddr)
41 sint *idx = (sint *) &indexes;
42 flt *src = (flt *) baseAddr;
43 for (int i=0; i < 2; i++)
44 r.v[i] = *(src + idx[i]);
49 add (const inta &b, const inta &c)
52 sint *r = (sint *) &result;
54 for (int i=0; i < 2; i++)
55 r[i] = b.v[i] + c.v[i];
62 inline uintv () { data.v[0] = 0; data.v[1] = 1; }
63 inline uintv (unsigned int a)
65 for (int i=0; i < 2; i++)
66 *(uint *) &data.v[i] = a;
68 inline uintv (inta x) : data (x) {}
69 inline uintv operator* (const uintv &x) const
70 { return multiply (data, x.data); }
71 inline uintv operator+ (const uintv &x) const
72 { return uintv (add (data, x.data)); }
73 inline unsigned short operator< (const uintv &x) const
74 { return less_than (data, x.data); }
80 explicit inline floatv (const uintv &x)
82 uint *p2 = (uint *) &x.data;
83 for (int i=0; i < 2; i++)
86 inline floatv (const float *array, const uintv &indexes)
88 const uintv &offsets = indexes * uintv (1);
89 data = gather (offsets.data, array);
91 unsigned short operator== (const floatv &x) const
94 for (int i=0; i < 2; i++)
95 if (data.v[i] == x.data.v[i]) r |= (1 << i);
103 const float array[2] = { 2, 3 };
104 for (uintv i; (i < 2) == 3; i = i + 2)
106 const floatv ii (i + 2);