1 | #ifdef __SPE__ |
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2 | |
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3 | #include <_ansi.h> |
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4 | #include <limits.h> |
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5 | #include <errno.h> |
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6 | #include <stdlib.h> |
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7 | #include <reent.h> |
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8 | #include "fix64.h" |
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9 | |
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10 | /* |
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11 | * Convert a string to a fixed-point 64-bit unsigned value. |
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12 | * |
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13 | * Ignores `locale' stuff. |
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14 | */ |
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15 | __uint64_t |
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16 | _strtoufix64_r (struct _reent *rptr, |
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17 | const char *nptr, |
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18 | char **endptr) |
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19 | { |
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20 | union long_double_union ldbl; |
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21 | int exp, sign, negexp, ld_type; |
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22 | __uint64_t tmp, tmp2, result = 0; |
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23 | |
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24 | init(ldbl); |
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25 | |
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26 | _simdstrtold ((char *)nptr, endptr, &ldbl); |
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27 | |
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28 | /* treat NAN as domain error, +/- infinity as saturation */ |
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29 | ld_type = _simdldcheck (&ldbl); |
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30 | if (ld_type != 0) |
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31 | { |
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32 | if (ld_type == 1) |
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33 | { |
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34 | rptr->_errno = EDOM; |
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35 | return 0; |
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36 | } |
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37 | rptr->_errno = ERANGE; |
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38 | if (word0(ldbl) & Sign_bit) |
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39 | return 0; |
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40 | return ULONG_LONG_MAX; |
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41 | } |
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42 | |
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43 | /* strip off sign and exponent */ |
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44 | sign = word0(ldbl) & Sign_bit; |
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45 | exp = ((word0(ldbl) & Exp_mask) >> Exp_shift) - Bias; |
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46 | negexp = -exp; |
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47 | if (negexp > 63) |
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48 | return 0; |
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49 | word0(ldbl) &= ~(Exp_mask | Sign_bit); |
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50 | /* add in implicit normalized bit */ |
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51 | word0(ldbl) |= Exp_msk1; |
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52 | /* shift so result is contained in single word */ |
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53 | tmp = word0(ldbl) << Ebits; |
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54 | tmp |= ((unsigned long)word1(ldbl) >> (32 - Ebits)); |
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55 | tmp <<= 32; |
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56 | if (Ebits < 32) |
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57 | tmp |= ((unsigned long)word1(ldbl) << Ebits); |
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58 | tmp |= ((unsigned long)word2(ldbl) >> (32 - Ebits)); |
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59 | |
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60 | /* check for saturation */ |
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61 | if (sign) |
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62 | { |
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63 | rptr->_errno = ERANGE; |
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64 | return 0; |
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65 | } |
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66 | else |
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67 | { |
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68 | if (exp > 0 || (exp == 0 && tmp >= 0x8000000000000000LL)) |
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69 | { |
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70 | rptr->_errno = ERANGE; |
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71 | return ULONG_LONG_MAX; |
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72 | } |
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73 | } |
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74 | |
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75 | /* otherwise we have normal number in range */ |
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76 | if (negexp > 1) |
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77 | { |
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78 | tmp2 = tmp + (1 << (negexp - 2)); |
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79 | result = (tmp2 >> (negexp - 1)); |
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80 | /* if rounding causes carry, add carry bit in */ |
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81 | if (tmp2 < tmp) |
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82 | result += 1 << (64 - negexp); |
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83 | } |
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84 | else |
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85 | { |
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86 | if (Ebits < 32) |
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87 | { |
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88 | result = tmp + ((word2(ldbl) & (1 << (32 - Ebits - 1))) != 0); |
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89 | /* if rounding causes carry, then saturation has occurred */ |
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90 | if (result < tmp) |
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91 | { |
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92 | rptr->_errno = ERANGE; |
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93 | return ULONG_LONG_MAX; |
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94 | } |
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95 | } |
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96 | else |
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97 | result = tmp; |
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98 | } |
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99 | |
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100 | return result; |
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101 | } |
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102 | |
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103 | #ifndef _REENT_ONLY |
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104 | |
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105 | __uint64_t |
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106 | strtoufix64 (const char *s, |
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107 | char **ptr) |
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108 | { |
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109 | return _strtoufix64_r (_REENT, s, ptr); |
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110 | } |
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111 | |
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112 | #endif |
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113 | |
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114 | #endif /* __SPE__ */ |
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