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std::fma

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C++
 
Biblioteca numéricos
Funções matemáticas comuns
De ponto flutuante ambiente
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Matrizes numéricas
Pseudo-aleatório de geração de números
Tempo de compilação aritmética racional (C++11)
Genéricos operações numéricas
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Generic numeric operations
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Funções matemáticas comuns
Funções
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Functions
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Operações básicas
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Basic operations
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fma
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Funções exponenciais
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Exponential functions
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Funções de poder
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Power functions
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Funções trigonométricas e hiperbólicas
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Trigonometric and hyperbolic functions
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Erro e funções gamma
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Error and gamma functions
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Número inteiro mais próximo de operações de ponto flutuante
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Nearest integer floating point operations
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Flutuando funções de manipulação de pontos
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Floating point manipulation functions
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Classificação / Comparação
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Constantes de macros
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Macro constants
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Definido no cabeçalho <cmath>
float       fma( float x, float y, float z );
 (1) (desde C++11)
double      fma( double x, double y, double z );
 (2) (desde C++11)
long double fma( long double x, long double y, long double z );
 (3) (desde C++11)
Promoted    fma( Arithmetic x, Arithmetic y, Arithmetic z );
 (4) (desde C++11)
#define FP_FAST_FMA  /* implementation-defined */
 (5) (desde C++11)
#define FP_FAST_FMAF /* implementation-defined */
 (6) (desde C++11)
#define FP_FAST_FMAL /* implementation-defined */
 (7) (desde C++11)
As funções fma calcular (x*y) + z, arredondado como uma operação ternária, de acordo com a
Original:
The fma functions compute (x*y) + z, rounded as one ternary operation, according to the
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modo de arredondamento caracterizado por o valor de FLT_ROUNDS.
Original:
rounding mode characterized by the value of FLT_ROUNDS.
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4)
Se algum argumento tem tipo integral, ele é convertido para double. Se qualquer outro argumento é long double, em seguida, o tipo de retorno é long double, caso contrário é double.
Original:
If any argument has integral type, it is cast to double. If any other argument is long double, then the return type is long double, otherwise it is double.
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5-7)
Se as constantes macro FP_FAST_FMAF, FP_FAST_FMA, ou FP_FAST_FMAL são definidos, a função avalia std::fma mais rápido do que a expressão x*y+z para float, double, argumentos e long double, respectivamente. Se definido, essas macros para avaliar 1 inteiro.
Original:
If the macro constants FP_FAST_FMAF, FP_FAST_FMA, or FP_FAST_FMAL are defined, the function std::fma evaluates faster than the expression x*y+z for float, double, and long double arguments, respectively. If defined, these macros evaluate to integer 1.
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[editar] Parâmetros

x, y, z -
valores de ponto flutuante
Original:
floating point values
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[editar] Valor de retorno

(x*y) + z, arredondado como uma operação ternária
Original:
(x*y) + z, rounded as one ternary operation
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[editar] Veja também

(C++11)
assinado restante da operação de divisão
Original:
signed remainder of the division operation
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(função) [edit]
(C++11)
assinado restante, bem como os três últimos bits da operação de divisão
Original:
signed remainder as well as the three last bits of the division operation
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(função) [edit]
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