scalbllnd2

NAME

scalbllnd2 - return long long elements multiplied by integral power of 2

SYNOPSIS

Procedure call syntax:

#include <simdmath.h>
vector long long scalbllnd2(vector long long x, vector signed int n);
Link with -lsimdmath

Inline call syntax:

#include <simdmath.h>
#include <scalbllnd2.h>
vector long long _scalbllnd2(vector long long x, vector signed int n);
Parameters  
x input vector
n scale factor

DESCRIPTION

The scalbllnd2 function returns a vector containing each element of x multiplied by 2^n computed efficiently. This function is computed without the assistance of any floating point operations and as such does not set any floating point exceptions.

RETURN VALUE

The function scalbllnd2 returns a long long vector in which each element is defined as:
  • the corresponding element of x multiplied by 2^n.
  • If the exponent is 0 then either x is 0 or x is a subnormal, and the result will be returned as 0.
  • If the result underflows it will be returned as 0.
  • If the result overflows it will be returned as FLT_MAX.

ENVIRONMENT

SPU only

CONFORMING TO

SIMD Math library specification for the Cell Broadband Engine™ Architecture.

NOTES

Basis

ISO9899 (C99) scalblln functions.

SEE ALSO

scalbn(3), log2(3), log2d2(3), log2f4(3), cbrt(3), cbrtd2(3), cbrtf4(3), exp(3), expd2(3), expf4(3), exp2(3), exp2d2(3), exp2f4(3), frexp(3), frexpd2(3), frexpf4(3), hypot(3), hypotd2(3), ilogb(3), ilogbd2(3), ilogbf4(3), ldexp(3), ldexpd2(3), ldexpf4(3), log(3), logd2(3), logf4(3), log10(3), log10d2(3), log10f4(3), log1p(3), log1pd2(3), log1pf4(3), logb(3), logbf4(3), sqrt(3), sqrtd2(3), sqrtf4(3)