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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | (C) Copyright IBM Corp. 2009 |
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| 3 | |||
| 4 | All rights reserved. |
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| 5 | |||
| 6 | Redistribution and use in source and binary forms, with or without |
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| 7 | modification, are permitted provided that the following conditions are met: |
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| 8 | |||
| 9 | * Redistributions of source code must retain the above copyright notice, |
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| 10 | this list of conditions and the following disclaimer. |
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| 11 | * Redistributions in binary form must reproduce the above copyright |
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| 12 | notice, this list of conditions and the following disclaimer in the |
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| 13 | documentation and/or other materials provided with the distribution. |
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| 14 | * Neither the name of IBM nor the names of its contributors may be |
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| 15 | used to endorse or promote products derived from this software without |
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| 16 | specific prior written permission. |
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| 17 | |||
| 18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 19 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 20 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 21 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 22 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 23 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 24 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 25 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 26 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 27 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 28 | POSSIBILITY OF SUCH DAMAGE. |
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| 29 | */ |
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| 30 | |||
| 31 | #include |
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| 32 | #include "local.h" |
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| 6536 | serge | 33 | #include "mprec.h" |
| 34 | #undef FLT_ROUNDS |
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| 4349 | Serge | 35 | |
| 6099 | serge | 36 | #ifdef _HAVE_LONG_DOUBLE |
| 37 | |||
| 38 | #if defined (__x86_64__) || defined (__i386__) |
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| 39 | static const int map[] = { |
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| 40 | 1, /* round to nearest */ |
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| 41 | 3, /* round to zero */ |
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| 42 | 2, /* round to negative infinity */ |
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| 43 | |||
| 44 | }; |
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| 45 | |||
| 46 | int |
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| 47 | __flt_rounds(void) |
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| 48 | { |
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| 49 | int x; |
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| 50 | |||
| 51 | /* Assume that the x87 and the SSE unit agree on the rounding mode. */ |
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| 52 | __asm("fnstcw %0" : "=m" (x)); |
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| 53 | return (map[(x >> 10) & 0x03]); |
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| 54 | } |
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| 55 | #define FLT_ROUNDS __flt_rounds() |
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| 56 | #else |
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| 57 | #define FLT_ROUNDS 0 |
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| 58 | #endif |
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| 59 | |||
| 60 | long double |
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| 61 | _strtold_r (struct _reent *ptr, const char *__restrict s00, |
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| 62 | char **__restrict se) |
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| 63 | { |
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| 4349 | Serge | 64 | #ifdef _LDBL_EQ_DBL |
| 6099 | serge | 65 | /* On platforms where long double is as wide as double. */ |
| 66 | return _strtod_r (ptr, s00, se); |
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| 67 | #else |
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| 68 | long double result; |
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| 69 | |||
| 70 | _strtorx_r (ptr, s00, se, FLT_ROUNDS, &result); |
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| 71 | return result; |
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| 72 | #endif |
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| 73 | } |
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| 74 | |||
| 4349 | Serge | 75 | long double |
| 4921 | Serge | 76 | strtold (const char *__restrict s00, char **__restrict se) |
| 4349 | Serge | 77 | { |
| 6099 | serge | 78 | return _strtold_r (_REENT, s00, se); |
| 4349 | Serge | 79 | } |
| 80 | |||
| 6099 | serge | 81 | #endif /* _HAVE_LONG_DOUBLE */ |
| 82 |