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std::numeric_limits::has_denorm_loss

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std::numeric_limits
 
static const bool has_denorm_loss
(avant C++11)
static constexpr bool has_denorm_loss
(depuis C++11)
La valeur de std::numeric_limits<T>::has_denorm_loss est true pour tous les types à virgule flottante T capable de distinguer la perte de précision due à la dénormalisation des autres causes de résultat inexact .
Original:
The value of std::numeric_limits<T>::has_denorm_loss is true for all floating-point types T capable of distinguishing loss of precision due to denormalization from other causes of inexact result.
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Sommaire

[modifier] Spécialisations standard

T
valeur de std::numeric_limits<T>::has_denorm_loss
Original:
value of std::numeric_limits<T>::has_denorm_loss
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/* non-specialized */ false
bool false
char false
signed char false
unsigned char false
wchar_t false
char16_t false
char32_t false
short false
unsigned short false
int false
unsigned int false
long false
unsigned long false
long long false
unsigned long long false
float
défini par l'implémentation
Original:
implementation-defined
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double
défini par l'implémentation
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implementation-defined
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long double
défini par l'implémentation
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implementation-defined
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[modifier] Notes

Conformes à la norme IEE 754 à virgule flottante implémentations peuvent détecter le dépassement inférieur à virgule flottante à trois moments prédéfinis:
Original:
Standard-compliant IEE 754 floating-point implementations may detect the floating-point underflow at three predefined moments:
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1)
après calcul d'un résultat à la valeur absolue plus petite que std::numeric_limits<T>::min(), cette mise en oeuvre avant l'arrondissement détecte tinyness .
Original:
after computation of a result with absolute value smaller than std::numeric_limits<T>::min(), such implementation detects tinyness before rounding.
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2)
après arrondi du résultat de bits de std::numeric_limits<T>::digits, si le résultat est minuscule, cette mise en œuvre détecte tinyness après arrondissement .
Original:
after rounding of the result to std::numeric_limits<T>::digits bits, if the result is tiny, such implementation detects tinyness after rounding.
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3)
si la conversion du résultat arrondi à la forme minuscule inférieure à la normale ont entraîné la perte de précision, cette mise en œuvre détecte une perte denorm .
Original:
if the conversion of the rounded tiny result to subnormal form resulted in the loss of precision, such implementation detects denorm loss.
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[modifier] Exemple

[modifier] Voir aussi

[
statique
Original:
static
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]
identifie types à virgule flottante qui détectent tinyness avant arrondis
Original:
identifies floating-point types that detect tinyness before rounding
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(constante membre statique publique) [edit]
[
statique
Original:
static
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]
identifie le style utilisé par la dénormalisation du type à virgule flottante
Original:
identifies the denormalization style used by the floating-point type
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(constante membre statique publique) [edit]