Developer Reference

Contents

v?Trunc

Computes an integer value rounded towards zero for each vector element.

Syntax

vsTrunc
(
n
,
a
,
y
)
;
vsTruncI(n, a, inca, y, incy);
vmsTrunc
(
n
,
a
,
y
,
mode
)
;
vmsTruncI(n, a, inca, y, incy, mode);
vdTrunc
(
n
,
a
,
y
)
;
vdTruncI(n, a, inca, y, incy);
vmdTrunc
(
n
,
a
,
y
,
mode
)
;
vmdTruncI(n, a, inca, y, incy, mode);
Include Files
  • mkl.h
Input Parameters
Name
Type
Description
n
const MKL_INT
Specifies the number of elements to be calculated.
a
const float*
for
vsTrunc
,
vmsTrunc
const double*
for
vdTrunc
,
vmdTrunc
Pointer to an array that contains the input vector
a
.
inca
,
incy
const MKL_INT
Specifies increments for the elements of
a
and
y
.
mode
const MKL_INT64
Overrides global VM mode setting for this function call. See
vmlSetMode
for possible values and their description.
Output Parameters
Name
Type
Description
y
float*
for
vsTrunc
,
vmsTrunc
double*
for
vdTrunc
,
vmdTrunc
Pointer to an array that contains the output vector
y
.
Description
The function computes an integer value rounded towards zero for each vector element.
Special Values for Real Function
v?Trunc(x)
Argument
Result
Exception
+0
+0
 
-0
-0
 
+
+
 
-
-
 
SNAN
QNAN
INVALID
QNAN
QNAN
 

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserverd for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804