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[/] [scarts/] [trunk/] [toolchain/] [scarts-newlib/] [newlib-1.17.0/] [newlib/] [libc/] [machine/] [powerpc/] [strtoufix64.c] - Rev 9
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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__ */