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| Rev | Author | Line No. | Line |
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| 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 | #if defined(__GNUC__) && !defined(_SOFT_FLOAT) |
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| 11 | |||
| 12 | #include |
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| 13 | |||
| 14 | /* |
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| 15 | FUNCTION |
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| 16 | < |
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| 17 | INDEX |
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| 18 | lrint |
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| 19 | INDEX |
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| 20 | lrintf |
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| 21 | INDEX |
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| 22 | lrintl |
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| 23 | |||
| 24 | ANSI_SYNOPSIS |
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| 25 | #include |
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| 26 | long int lrint(double x); |
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| 27 | long int lrintf(float x); |
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| 28 | long int lrintl(long double x); |
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| 29 | |||
| 30 | TRAD_SYNOPSIS |
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| 31 | ANSI-only. |
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| 32 | |||
| 33 | DESCRIPTION |
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| 34 | The < |
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| 35 | according to the current rounding direction. If the rounded value is outside the |
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| 36 | range of the return type, the numeric result is unspecified. A range error may |
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| 37 | occur if the magnitude of <[x]> is too large. |
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| 38 | |||
| 39 | RETURNS |
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| 40 | These functions return the rounded integer value of <[x]>. |
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| 41 | < |
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| 42 | |||
| 43 | PORTABILITY |
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| 44 | < |
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| 45 | < |
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| 46 | < |
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| 47 | floating point support is available and when compiling with GCC. |
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| 48 | |||
| 49 | */ |
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| 50 | |||
| 51 | /* |
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| 52 | * Fast math version of lrint(x) |
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| 53 | * Return x rounded to integral value according to the prevailing |
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| 54 | * rounding mode. |
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| 55 | * Method: |
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| 56 | * Using inline x87 asms. |
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| 57 | * Exception: |
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| 58 | * Governed by x87 FPCR. |
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| 59 | */ |
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| 60 | |||
| 61 | long int _f_lrint (double x) |
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| 62 | { |
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| 63 | long int _result; |
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| 64 | asm ("fistpl %0" : "=m" (_result) : "t" (x) : "st"); |
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| 65 | return _result; |
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| 66 | } |
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| 67 | |||
| 68 | #endif /* !__GNUC__ || _SOFT_FLOAT */ |
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| 69 |