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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [machine/] [powerpc/] [strtoufix64.c] - Blame information for rev 345

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#ifdef __SPE__
 
#include <_ansi.h>
#include <limits.h>
#include <errno.h>
#include <stdlib.h>
#include <reent.h>
#include "fix64.h"
 
/*
 * Convert a string to a fixed-point 64-bit unsigned value.
 *
 * Ignores `locale' stuff.
 */
__uint64_t
_DEFUN (_strtoufix64_r, (rptr, nptr, endptr),
        struct _reent *rptr _AND
        _CONST char *nptr _AND
        char **endptr)
{
  union long_double_union ldbl;
  int exp, sign, negexp, ld_type;
  __uint64_t tmp, tmp2, result = 0;
 
  init(ldbl);
 
  _simdstrtold ((char *)nptr, endptr, &ldbl);
 
  /* treat NAN as domain error, +/- infinity as saturation */
  ld_type = _simdldcheck (&ldbl);
  if (ld_type != 0)
    {
      if (ld_type == 1)
        {
          rptr->_errno = EDOM;
          return 0;
        }
      rptr->_errno = ERANGE;
      if (word0(ldbl) & Sign_bit)
        return 0;
      return ULONG_LONG_MAX;
    }
 
  /* strip off sign and exponent */
  sign = word0(ldbl) & Sign_bit;
  exp = ((word0(ldbl) & Exp_mask) >> Exp_shift) - Bias;
  negexp = -exp;
  if (negexp > 63)
    return 0;
  word0(ldbl) &= ~(Exp_mask | Sign_bit);
  /* add in implicit normalized bit */
  word0(ldbl) |= Exp_msk1;
  /* shift so result is contained in single word */
  tmp = word0(ldbl) << Ebits;
  tmp |= ((unsigned long)word1(ldbl) >> (32 - Ebits));
  tmp <<= 32;
  if (Ebits < 32)
    tmp |= ((unsigned long)word1(ldbl) << Ebits);
  tmp |= ((unsigned long)word2(ldbl) >> (32 - Ebits));
 
  /* check for saturation */
  if (sign)
    {
      rptr->_errno = ERANGE;
      return 0;
    }
  else
    {
      if (exp > 0 || (exp == 0 && tmp >= 0x8000000000000000LL))
        {
          rptr->_errno = ERANGE;
          return ULONG_LONG_MAX;
        }
    }
 
  /* otherwise we have normal number in range */
  if (negexp > 1)
    {
      tmp2 = tmp + (1 << (negexp - 2));
      result = (tmp2 >> (negexp - 1));
      /* if rounding causes carry, add carry bit in */
      if (tmp2 < tmp)
        result += 1 << (64 - negexp);
    }
  else
    {
      if (Ebits < 32)
        {
          result = tmp + ((word2(ldbl) & (1 << (32 - Ebits - 1))) != 0);
          /* if rounding causes carry, then saturation has occurred */
          if (result < tmp)
            {
              rptr->_errno = ERANGE;
              return ULONG_LONG_MAX;
            }
        }
      else
        result = tmp;
    }
 
  return result;
}
 
#ifndef _REENT_ONLY
 
__uint64_t
_DEFUN (strtoufix64, (s, ptr, base),
        _CONST char *s _AND
        char **ptr)
{
  return _strtoufix64_r (_REENT, s, ptr);
}
 
#endif
 
#endif /* __SPE__ */

Line No.	Rev	Author	Line
1	207	jeremybenn	`#ifdef __SPE__`
2
3			`#include <_ansi.h>`
4			`#include <limits.h>`
5			`#include <errno.h>`
6			`#include <stdlib.h>`
7			`#include <reent.h>`
8			`#include "fix64.h"`
9
10			`/*`
11			`* Convert a string to a fixed-point 64-bit unsigned value.`
12			`*`
13			* Ignores `locale' stuff.
14			`*/`
15			`__uint64_t`
16			`_DEFUN (_strtoufix64_r, (rptr, nptr, endptr),`
17			`struct _reent *rptr _AND`
18			`_CONST char *nptr _AND`
19			`char **endptr)`
20			`{`
21			`union long_double_union ldbl;`
22			`int exp, sign, negexp, ld_type;`
23			`__uint64_t tmp, tmp2, result = 0;`
24
25			`init(ldbl);`
26
27			`_simdstrtold ((char *)nptr, endptr, &ldbl);`
28
29			`/* treat NAN as domain error, +/- infinity as saturation */`
30			`ld_type = _simdldcheck (&ldbl);`
31			`if (ld_type != 0)`
32			`{`
33			`if (ld_type == 1)`
34			`{`
35			`rptr->_errno = EDOM;`
36			`return 0;`
37			`}`
38			`rptr->_errno = ERANGE;`
39			`if (word0(ldbl) & Sign_bit)`
40			`return 0;`
41			`return ULONG_LONG_MAX;`
42			`}`
43
44			`/* strip off sign and exponent */`
45			`sign = word0(ldbl) & Sign_bit;`
46			`exp = ((word0(ldbl) & Exp_mask) >> Exp_shift) - Bias;`
47			`negexp = -exp;`
48			`if (negexp > 63)`
49			`return 0;`
50			`word0(ldbl) &= ~(Exp_mask \| Sign_bit);`
51			`/* add in implicit normalized bit */`
52			`word0(ldbl) \|= Exp_msk1;`
53			`/* shift so result is contained in single word */`
54			`tmp = word0(ldbl) << Ebits;`
55			`tmp \|= ((unsigned long)word1(ldbl) >> (32 - Ebits));`
56			`tmp <<= 32;`
57			`if (Ebits < 32)`
58			`tmp \|= ((unsigned long)word1(ldbl) << Ebits);`
59			`tmp \|= ((unsigned long)word2(ldbl) >> (32 - Ebits));`
60
61			`/* check for saturation */`
62			`if (sign)`
63			`{`
64			`rptr->_errno = ERANGE;`
65			`return 0;`
66			`}`
67			`else`
68			`{`
69			`if (exp > 0 \|\| (exp == 0 && tmp >= 0x8000000000000000LL))`
70			`{`
71			`rptr->_errno = ERANGE;`
72			`return ULONG_LONG_MAX;`
73			`}`
74			`}`
75
76			`/* otherwise we have normal number in range */`
77			`if (negexp > 1)`
78			`{`
79			`tmp2 = tmp + (1 << (negexp - 2));`
80			`result = (tmp2 >> (negexp - 1));`
81			`/* if rounding causes carry, add carry bit in */`
82			`if (tmp2 < tmp)`
83			`result += 1 << (64 - negexp);`
84			`}`
85			`else`
86			`{`
87			`if (Ebits < 32)`
88			`{`
89			`result = tmp + ((word2(ldbl) & (1 << (32 - Ebits - 1))) != 0);`
90			`/* if rounding causes carry, then saturation has occurred */`
91			`if (result < tmp)`
92			`{`
93			`rptr->_errno = ERANGE;`
94			`return ULONG_LONG_MAX;`
95			`}`
96			`}`
97			`else`
98			`result = tmp;`
99			`}`
100
101			`return result;`
102			`}`
103
104			`#ifndef _REENT_ONLY`
105
106			`__uint64_t`
107			`_DEFUN (strtoufix64, (s, ptr, base),`
108			`_CONST char *s _AND`
109			`char **ptr)`
110			`{`
111			`return _strtoufix64_r (_REENT, s, ptr);`
112			`}`
113
114			`#endif`
115
116			`#endif /* __SPE__ */`

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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [machine/] [powerpc/] [strtoufix64.c] - Blame information for rev 345