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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * ==================================================== |
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| 3 | * x87 FP implementation contributed to Newlib by |
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| 4 | * Dave Korn, November 2007. This file is placed in the |
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| 5 | * public domain. Permission to use, copy, modify, and |
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| 6 | * distribute this software is freely granted. |
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| 7 | * ==================================================== |
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| 8 | */ |
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| 9 | |||
| 10 | #ifdef __GNUC__ |
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| 11 | #if !defined(_SOFT_FLOAT) |
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| 12 | |||
| 13 | #include |
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| 14 | |||
| 15 | /* |
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| 16 | FUNCTION |
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| 17 | < |
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| 18 | INDEX |
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| 19 | llrint |
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| 20 | INDEX |
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| 21 | llrintf |
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| 22 | INDEX |
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| 23 | llrintl |
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| 24 | |||
| 25 | ANSI_SYNOPSIS |
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| 26 | #include |
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| 27 | long long int llrint(double x); |
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| 28 | long long int llrintf(float x); |
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| 29 | long long int llrintl(long double x); |
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| 30 | |||
| 31 | TRAD_SYNOPSIS |
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| 32 | ANSI-only. |
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| 33 | |||
| 34 | DESCRIPTION |
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| 35 | The < |
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| 36 | according to the current rounding direction. If the rounded value is outside the |
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| 37 | range of the return type, the numeric result is unspecified. A range error may |
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| 38 | occur if the magnitude of <[x]> is too large. |
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| 39 | |||
| 40 | RETURNS |
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| 41 | These functions return the rounded integer value of <[x]>. |
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| 42 | < |
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| 43 | |||
| 44 | PORTABILITY |
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| 45 | < |
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| 46 | The fast math versions of < |
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| 47 | available on i386 platforms when hardware floating point support is available |
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| 48 | and when compiling with GCC. |
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| 49 | |||
| 50 | */ |
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| 51 | |||
| 52 | /* |
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| 53 | * Fast math version of llrint(x) |
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| 54 | * Return x rounded to integral value according to the prevailing |
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| 55 | * rounding mode. |
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| 56 | * Method: |
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| 57 | * Using inline x87 asms. |
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| 58 | * Exception: |
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| 59 | * Governed by x87 FPCR. |
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| 60 | */ |
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| 61 | |||
| 62 | long long int _f_llrint (double x) |
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| 63 | { |
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| 64 | long long int _result; |
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| 65 | asm ("fistpll %0" : "=m" (_result) : "t" (x) : "st"); |
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| 66 | return _result; |
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| 67 | } |
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| 68 | |||
| 69 | #endif /* !_SOFT_FLOAT */ |
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| 70 | #endif /* __GNUC__ */ |