NAME
logd2
- return base-e (natural) logarithms of double elements
SYNOPSIS
Procedure
call syntax:
| #include <simdmath.h> |
| vector double logd2(vector double x); |
| Link with -lsimdmath |
Inline call syntax:
| #include <simdmath.h> |
| #include <logd2.h> |
| vector double _logd2(vector double x); |
| Parameters |
|
| x |
input vector |
DESCRIPTION
The logd2 function
returns the natural logarithms for each x.
RETURN VALUE
The function
logd2 returns
a double vector in which each element is defined as:
- the natural logarithm for the corresponding element of x.
- If an element of x is negative, the corresponding element of the
result is undefined.
CONFORMING TO
SIMD Math library
specification for the Cell Broadband Engine™ Architecture.
NOTES
Basis
ISO9899
(C99) log functions.
SEE ALSO
log(3),
logf4(3), exp(3),
expf4(3),
expd2(3), exp2(3),
exp2f4(3),
exp2d2(3), expm1(3),
expm1f4(3),
expm1d2(3), frexp(3),
frexpf4(3),
frexpd2(3), ldexp(3),
ldexpf4(3),
ldexpd2(3), pow(3),
powf4(3),
powd2(3), hypot(3),
hypotd2(3),
hypotf4(3), sqrt(3),
sqrtf4(3),
sqrtd2(3),
cbrt(3),
cbrtf4(3),
cbrtd2(3), log10(3),
log2f4(3),
log2d2(3), log1p(3),
log10f4(3),
log10d2(3), logb(3),
log1pf4(3),
log1pd2(3), ilogb(3),
logbf4(3),
scalbn(3),
ilogbf4(3),
ilogbd2(3)