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std::numeric_limits::has_denorm_loss

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std::numeric_limits
 
static const bool has_denorm_loss
(até C + 11)
static constexpr bool has_denorm_loss
(a partir do C++ 11)
O valor da std::numeric_limits<T>::has_denorm_loss é true para todos os tipos de ponto flutuante T capaz de distinguir perda de precisão devido a desnormalização de outras causas de resultado inexata.
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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Índice

[editar] Especializações padrão

T
valor 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
definida pela implementação
Original:
implementation-defined
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double
definida pela implementação
Original:
implementation-defined
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long double
definida pela implementação
Original:
implementation-defined
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[editar] Notas

Compatível com o padrão IEE 754 implementações de ponto flutuante pode detectar o estouro de ponto flutuante em três momentos predefinidos:
Original:
Standard-compliant IEE 754 floating-point implementations may detect the floating-point underflow at three predefined moments:
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1)
depois de computação de um resultado com valor absoluto menor do que std::numeric_limits<T>::min(), essa implementação detecta tinyness antes de arredondamentos.
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)
após o arredondamento do resultado para bits std::numeric_limits<T>::digits, se o resultado é pequena, essa aplicação detecta tinyness após o arredondamento.
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)
se a conversão do resultado arredondado para minúscula forma subnormal resultou na perda de precisão, tal implementação detecta perda 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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[editar] Exemplo

[editar] Veja também

[estática]
identifica tipos de ponto flutuante que detectam tinyness antes de arredondamentos
Original:
identifies floating-point types that detect tinyness before rounding
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(membro estático público constante) [edit]
[estática]
identifica o estilo desnormalização usado pelo tipo de ponto flutuante
Original:
identifies the denormalization style used by the floating-point type
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(membro estático público constante) [edit]