| 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 (sign + 63-bits) value. |
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| 12 | * |
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| 13 | * Ignores `locale' stuff. |
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| 14 | */ |
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| 15 | __int64_t |
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| 16 | _strtosfix64_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, negexp, sign, ld_type; |
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| 22 | __uint64_t tmp, tmp2; |
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| 23 | __int64_t result = 0; |
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| 24 | |
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| 25 | init(ldbl); |
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| 26 | |
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| 27 | _simdstrtold ((char *)nptr, endptr, &ldbl); |
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| 28 | |
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| 29 | /* treat NAN as domain error, +/- infinity as saturation */ |
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| 30 | ld_type = _simdldcheck (&ldbl); |
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| 31 | if (ld_type != 0) |
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| 32 | { |
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| 33 | if (ld_type == 1) |
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| 34 | { |
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| 35 | rptr->_errno = EDOM; |
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| 36 | return 0; |
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| 37 | } |
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| 38 | rptr->_errno = ERANGE; |
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| 39 | if (word0(ldbl) & Sign_bit) |
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| 40 | return LONG_LONG_MIN; |
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| 41 | return LONG_LONG_MAX; |
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| 42 | } |
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| 43 | |
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| 44 | /* strip off sign and exponent */ |
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| 45 | sign = word0(ldbl) & Sign_bit; |
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| 46 | exp = ((word0(ldbl) & Exp_mask) >> Exp_shift) - Bias; |
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| 47 | negexp = -exp; |
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| 48 | if (negexp > 63) |
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| 49 | return 0; |
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| 50 | word0(ldbl) &= ~(Exp_mask | Sign_bit); |
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| 51 | /* add in implicit normalized bit */ |
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| 52 | word0(ldbl) |= Exp_msk1; |
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| 53 | /* shift so result is contained in single word */ |
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| 54 | tmp = word0(ldbl) << Ebits; |
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| 55 | tmp |= ((unsigned long)word1(ldbl) >> (32 - Ebits)); |
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| 56 | tmp <<= 32; |
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| 57 | if (Ebits < 32) |
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| 58 | tmp |= ((unsigned long)word1(ldbl) << Ebits); |
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| 59 | tmp |= ((unsigned long)word2(ldbl) >> (32 - Ebits)); |
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| 60 | |
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| 61 | /* check for saturation */ |
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| 62 | if (sign) |
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| 63 | { |
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| 64 | if (exp > 0 || (exp == 0 && tmp != 0x8000000000000000LL)) |
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| 65 | { |
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| 66 | rptr->_errno = ERANGE; |
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| 67 | return LONG_LONG_MIN; |
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| 68 | } |
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| 69 | } |
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| 70 | else |
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| 71 | { |
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| 72 | if (exp >= 0) |
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| 73 | { |
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| 74 | rptr->_errno = ERANGE; |
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| 75 | return LONG_LONG_MAX; |
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| 76 | } |
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| 77 | } |
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| 78 | |
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| 79 | /* otherwise we have normal number in range */ |
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| 80 | if (negexp != 0) |
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| 81 | { |
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| 82 | /* perform rounding */ |
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| 83 | tmp2 = tmp + (1 << (negexp - 1)); |
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| 84 | result = (long long)(tmp2 >> negexp); |
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| 85 | /* check if rounding caused carry bit which must be added into result */ |
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| 86 | if (tmp2 < tmp) |
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| 87 | result |= (1 << (64 - negexp)); |
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| 88 | /* check if positive saturation has occurred because of rounding */ |
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| 89 | if (!sign && result < 0) |
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| 90 | { |
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| 91 | rptr->_errno = ERANGE; |
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| 92 | return LONG_LONG_MAX; |
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| 93 | } |
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| 94 | } |
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| 95 | else |
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| 96 | { |
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| 97 | /* we have -1.0, no rounding necessary */ |
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| 98 | return LONG_LONG_MIN; |
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| 99 | } |
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| 100 | |
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| 101 | return sign ? -result : result; |
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| 102 | } |
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| 103 | |
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| 104 | #ifndef _REENT_ONLY |
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| 105 | |
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| 106 | __int64_t |
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| 107 | strtosfix64 (const char *s, |
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| 108 | char **ptr) |
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| 109 | { |
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| 110 | return _strtosfix64_r (_REENT, s, ptr); |
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| 111 | } |
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| 112 | |
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| 113 | #endif |
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| 114 | |
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| 115 | #endif /* __SPE__ */ |
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