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Subversion Repositories openrisc_2011-10-31

[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [machine/] [powerpc/] [strtosfix64.c] - Blame information for rev 194

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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 (sign + 63-bits) value.
 *
 * Ignores `locale' stuff.
 */
__int64_t
_DEFUN (_strtosfix64_r, (rptr, nptr, endptr),
        struct _reent *rptr _AND
        _CONST char *nptr _AND
        char **endptr)
{
  union long_double_union ldbl;
  int exp, negexp, sign, ld_type;
  __uint64_t tmp, tmp2;
  __int64_t 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 LONG_LONG_MIN;
      return LONG_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)
    {
      if (exp > 0 || (exp == 0 && tmp != 0x8000000000000000LL))
        {
          rptr->_errno = ERANGE;
          return LONG_LONG_MIN;
        }
    }
  else
    {
      if (exp >= 0)
        {
          rptr->_errno = ERANGE;
          return LONG_LONG_MAX;
        }
    }
 
  /* otherwise we have normal number in range */
  if (negexp != 0)
    {
      /* perform rounding */
      tmp2 = tmp + (1 << (negexp - 1));
      result = (long long)(tmp2 >> negexp);
      /* check if rounding caused carry bit which must be added into result */
      if (tmp2 < tmp)
        result |= (1 << (64 - negexp));
      /* check if positive saturation has occurred because of rounding */
      if (!sign && result < 0)
        {
          rptr->_errno = ERANGE;
          return LONG_LONG_MAX;
        }
    }
  else
    {
      /* we have -1.0, no rounding necessary */
      return LONG_LONG_MIN;
    }
 
  return sign ? -result : result;
}
 
#ifndef _REENT_ONLY
 
__int64_t
_DEFUN (strtosfix64, (s, ptr, base),
        _CONST char *s _AND
        char **ptr)
{
  return _strtosfix64_r (_REENT, s, ptr);
}
 
#endif
 
#endif /* __SPE__ */

Line No.	Rev	Author	Line
1	148	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 (sign + 63-bits) value.`
12			`*`
13			* Ignores `locale' stuff.
14			`*/`
15			`__int64_t`
16			`_DEFUN (_strtosfix64_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, negexp, sign, ld_type;`
23			`__uint64_t tmp, tmp2;`
24			`__int64_t result = 0;`
25
26			`init(ldbl);`
27
28			`_simdstrtold ((char *)nptr, endptr, &ldbl);`
29
30			`/* treat NAN as domain error, +/- infinity as saturation */`
31			`ld_type = _simdldcheck (&ldbl);`
32			`if (ld_type != 0)`
33			`{`
34			`if (ld_type == 1)`
35			`{`
36			`rptr->_errno = EDOM;`
37			`return 0;`
38			`}`
39			`rptr->_errno = ERANGE;`
40			`if (word0(ldbl) & Sign_bit)`
41			`return LONG_LONG_MIN;`
42			`return LONG_LONG_MAX;`
43			`}`
44
45			`/* strip off sign and exponent */`
46			`sign = word0(ldbl) & Sign_bit;`
47			`exp = ((word0(ldbl) & Exp_mask) >> Exp_shift) - Bias;`
48			`negexp = -exp;`
49			`if (negexp > 63)`
50			`return 0;`
51			`word0(ldbl) &= ~(Exp_mask \| Sign_bit);`
52			`/* add in implicit normalized bit */`
53			`word0(ldbl) \|= Exp_msk1;`
54			`/* shift so result is contained in single word */`
55			`tmp = word0(ldbl) << Ebits;`
56			`tmp \|= ((unsigned long)word1(ldbl) >> (32 - Ebits));`
57			`tmp <<= 32;`
58			`if (Ebits < 32)`
59			`tmp \|= ((unsigned long)word1(ldbl) << Ebits);`
60			`tmp \|= ((unsigned long)word2(ldbl) >> (32 - Ebits));`
61
62			`/* check for saturation */`
63			`if (sign)`
64			`{`
65			`if (exp > 0 \|\| (exp == 0 && tmp != 0x8000000000000000LL))`
66			`{`
67			`rptr->_errno = ERANGE;`
68			`return LONG_LONG_MIN;`
69			`}`
70			`}`
71			`else`
72			`{`
73			`if (exp >= 0)`
74			`{`
75			`rptr->_errno = ERANGE;`
76			`return LONG_LONG_MAX;`
77			`}`
78			`}`
79
80			`/* otherwise we have normal number in range */`
81			`if (negexp != 0)`
82			`{`
83			`/* perform rounding */`
84			`tmp2 = tmp + (1 << (negexp - 1));`
85			`result = (long long)(tmp2 >> negexp);`
86			`/* check if rounding caused carry bit which must be added into result */`
87			`if (tmp2 < tmp)`
88			`result \|= (1 << (64 - negexp));`
89			`/* check if positive saturation has occurred because of rounding */`
90			`if (!sign && result < 0)`
91			`{`
92			`rptr->_errno = ERANGE;`
93			`return LONG_LONG_MAX;`
94			`}`
95			`}`
96			`else`
97			`{`
98			`/* we have -1.0, no rounding necessary */`
99			`return LONG_LONG_MIN;`
100			`}`
101
102			`return sign ? -result : result;`
103			`}`
104
105			`#ifndef _REENT_ONLY`
106
107			`__int64_t`
108			`_DEFUN (strtosfix64, (s, ptr, base),`
109			`_CONST char *s _AND`
110			`char **ptr)`
111			`{`
112			`return _strtosfix64_r (_REENT, s, ptr);`
113			`}`
114
115			`#endif`
116
117			`#endif /* __SPE__ */`

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [machine/] [powerpc/] [strtosfix64.c] - Blame information for rev 194