Visible to Intel only — GUID: GUID-135E6DAA-1019-4527-874C-734A2F350B93
Visible to Intel only — GUID: GUID-135E6DAA-1019-4527-874C-734A2F350B93
v?Cos
Computes cosine of vector elements.
Syntax
call vscos( n, a, y )
call vscosi(n, a, inca, y, incy)
call vmscos( n, a, y, mode )
call vmscosi(n, a, inca, y, incy, mode)
call vdcos( n, a, y )
call vdcosi(n, a, inca, y, incy)
call vmdcos( n, a, y, mode )
call vmdcosi(n, a, inca, y, incy, mode)
call vccos( n, a, y )
call vccosi(n, a, inca, y, incy)
call vmccos( n, a, y, mode )
call vmccosi(n, a, inca, y, incy, mode)
call vzcos( n, a, y )
call vzcosi(n, a, inca, y, incy)
call vmzcos( n, a, y, mode )
call vmzcosi(n, a, inca, y, incy, mode)
Include Files
- mkl_vml.f90
Input Parameters
Name |
Type |
Description |
---|---|---|
n |
INTEGER, INTENT(IN) |
Specifies the number of elements to be calculated. |
a |
DOUBLE PRECISION for vdcos, vmdcos COMPLEX for vccos, vmccos DOUBLE PRECISION for vzcos, vmzcos REAL, INTENT(IN) for vscos, vmscos DOUBLE PRECISION, INTENT(IN) for vdcos, vmdcos COMPLEX, INTENT(IN) for vccos, vmccos DOUBLE PRECISION, INTENT(IN) for vzcos, vmzcos |
Array that specifies the input vector a. |
inca, incy |
INTEGER, INTENT(IN) |
Specifies increments for the elements of a and y. |
mode |
INTEGER(KIND=8), INTENT(IN) |
Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description. |
Output Parameters
Name |
Type |
Description |
---|---|---|
y |
DOUBLE PRECISION for vdcos, vmdcos COMPLEX for vccos, vmccos DOUBLE PRECISION for vzcos, vmzcos REAL, INTENT(OUT) for vscos, vmscos DOUBLE PRECISION, INTENT(OUT) for vdcos, vmdcos COMPLEX, INTENT(OUT) for vccos, vmccos DOUBLE PRECISION, INTENT(OUT) for vzcos, vmzcos |
Array that specifies the output vector y. |
Description
The v?Cos function computes cosine of vector elements.
Note that arguments abs(a[i]) ≤ 213 and abs(a[i]) ≤ 216 for single and double precisions respectively are called fast computational path. These are trigonometric function arguments for which VM provides the best possible performance. Avoid arguments that do not belong to the fast computational path in the VM High Accuracy (HA) and Low Accuracy (LA) functions. Alternatively, you can use VM Enhanced Performance (EP) functions that are fast on the entire function domain. However, these functions provide less accuracy.
Argument | Result | VM Error Status | Exception |
---|---|---|---|
+0 | +1 | ||
-0 | +1 | ||
+∞ | QNAN | VML_STATUS_ERRDOM | INVALID |
-∞ | QNAN | VML_STATUS_ERRDOM | INVALID |
QNAN | QNAN | ||
SNAN | QNAN | INVALID |
Specifications for special values of the complex functions are defined according to the following formula
Cos(z) = Cosh(i*z).
Product and Performance Information |
---|
Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex. Notice revision #20201201 |