| 1 | #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 "vfieeefp.h" |
|---|
| 9 | |
|---|
| 10 | /* |
|---|
| 11 | * Convert a string to a fixed-point 32-bit value. |
|---|
| 12 | * |
|---|
| 13 | * Ignores `locale' stuff. |
|---|
| 14 | */ |
|---|
| 15 | __uint32_t |
|---|
| 16 | _strtoufix32_r (struct _reent *rptr, |
|---|
| 17 | const char *nptr, |
|---|
| 18 | char **endptr) |
|---|
| 19 | { |
|---|
| 20 | union double_union dbl; |
|---|
| 21 | int exp, negexp; |
|---|
| 22 | __uint32_t tmp, tmp2, result = 0; |
|---|
| 23 | |
|---|
| 24 | dbl.d = _strtod_r (rptr, nptr, endptr); |
|---|
| 25 | |
|---|
| 26 | /* treat NAN as domain error, +/- infinity as saturation */ |
|---|
| 27 | if (!finite(dbl.d)) |
|---|
| 28 | { |
|---|
| 29 | if (isnan (dbl.d)) |
|---|
| 30 | { |
|---|
| 31 | rptr->_errno = EDOM; |
|---|
| 32 | return 0; |
|---|
| 33 | } |
|---|
| 34 | rptr->_errno = ERANGE; |
|---|
| 35 | if (word0(dbl) & Sign_bit) |
|---|
| 36 | return 0; |
|---|
| 37 | return ULONG_MAX; |
|---|
| 38 | } |
|---|
| 39 | |
|---|
| 40 | /* check for normal saturation */ |
|---|
| 41 | if (dbl.d >= 1.0) |
|---|
| 42 | { |
|---|
| 43 | rptr->_errno = ERANGE; |
|---|
| 44 | return ULONG_MAX; |
|---|
| 45 | } |
|---|
| 46 | else if (dbl.d < 0) |
|---|
| 47 | { |
|---|
| 48 | rptr->_errno = ERANGE; |
|---|
| 49 | return 0; |
|---|
| 50 | } |
|---|
| 51 | |
|---|
| 52 | /* otherwise we have normal positive number in range */ |
|---|
| 53 | |
|---|
| 54 | /* strip off exponent */ |
|---|
| 55 | exp = ((word0(dbl) & Exp_mask) >> Exp_shift) - Bias; |
|---|
| 56 | negexp = -exp; |
|---|
| 57 | if (negexp > 32) |
|---|
| 58 | return 0; |
|---|
| 59 | word0(dbl) &= ~(Exp_mask | Sign_bit); |
|---|
| 60 | /* add in implicit normalized bit */ |
|---|
| 61 | word0(dbl) |= Exp_msk1; |
|---|
| 62 | /* shift so result is contained left-justified in word */ |
|---|
| 63 | tmp = word0(dbl) << Ebits; |
|---|
| 64 | tmp |= ((unsigned long)word1(dbl) >> (32 - Ebits)); |
|---|
| 65 | /* perform rounding */ |
|---|
| 66 | if (negexp > 1) |
|---|
| 67 | { |
|---|
| 68 | tmp2 = tmp + (1 << (negexp - 2)); |
|---|
| 69 | result = (tmp2 >> (negexp - 1)); |
|---|
| 70 | /* if rounding causes carry, add carry bit in */ |
|---|
| 71 | if (tmp2 < tmp) |
|---|
| 72 | result += 1 << (32 - negexp); |
|---|
| 73 | } |
|---|
| 74 | else |
|---|
| 75 | { |
|---|
| 76 | result = tmp + ((word1(dbl) & (1 << (32 - Ebits - 1))) != 0); |
|---|
| 77 | /* if rounding causes carry, then saturation has occurred */ |
|---|
| 78 | if (result < tmp) |
|---|
| 79 | { |
|---|
| 80 | rptr->_errno = ERANGE; |
|---|
| 81 | return ULONG_MAX; |
|---|
| 82 | } |
|---|
| 83 | } |
|---|
| 84 | |
|---|
| 85 | return result; |
|---|
| 86 | } |
|---|
| 87 | |
|---|
| 88 | #ifndef _REENT_ONLY |
|---|
| 89 | |
|---|
| 90 | __uint32_t |
|---|
| 91 | strtoufix32 (const char *s, |
|---|
| 92 | char **ptr) |
|---|
| 93 | { |
|---|
| 94 | return _strtoufix32_r (_REENT, s, ptr); |
|---|
| 95 | } |
|---|
| 96 | |
|---|
| 97 | #endif |
|---|
| 98 | |
|---|
| 99 | #endif /* __SPE__ */ |
|---|
