Visible to Intel only — GUID: GUID-AEE083E1-6A3B-4CAF-A8D6-51D4F8F4B31B
Visible to Intel only — GUID: GUID-AEE083E1-6A3B-4CAF-A8D6-51D4F8F4B31B
v?Sub
Performs element by element subtraction of vector b from vector a.
Syntax
call vssub( n, a, b, y )
call vssubi(n, a, inca, b, incb, y, incy)
call vmssub( n, a, b, y, mode )
call vmssubi(n, a, inca, b, incb, y, incy, mode)
call vdsub( n, a, b, y )
call vdsubi(n, a, inca, b, incb, y, incy)
call vmdsub( n, a, b, y, mode )
call vmdsubi(n, a, inca, b, incb, y, incy, mode)
call vcsub( n, a, b, y )
call vcsubi(n, a, inca, b, incb, y, incy)
call vmcsub( n, a, b, y, mode )
call vmcsubi(n, a, inca, b, incb, y, incy, mode)
call vzsub( n, a, b, y )
call vzsubi(n, a, inca, b, incb, y, incy)
call vmzsub( n, a, b, y, mode )
call vmzsubi(n, a, inca, b, incb, 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, b |
DOUBLE PRECISION for vdsub, vmdsub COMPLEX for vcsub, vmcsub DOUBLE COMPLEX for vzsub, vmzsub REAL, INTENT(IN) for vssub, vmssub DOUBLE PRECISION, INTENT(IN) for vdsub, vmdsub COMPLEX, INTENT(IN) for vcsub, vmcsub DOUBLE COMPLEX, INTENT(IN) for vzsub, vmzsub |
Arrays that specify the input vectors a and b. |
inca, incb, incy |
INTEGER, INTENT(IN) |
Specifies increments for the elements of a, b, 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 |
FORTRAN 77: REAL for vssub, vmssub DOUBLE PRECISION for vdsub, vmdsub COMPLEX for vcsub, vmcsub DOUBLE COMPLEX for vzsub, vmzsub REALINTENT(OUT) for vssub, vmssub DOUBLE PRECISION, INTENT(OUT) for vdsub, vmdsub COMPLEX, INTENT(OUT) for vcsub, vmcsub DOUBLE COMPLEX, INTENT(OUT) for vzsub, vmzsub |
Array that specifies the output vector y. |
Description
The v?Sub function performs element by element subtraction of vector b from vector a.
Argument 1 | Argument 2 | Result | Exception |
---|---|---|---|
+0 | +0 | +0 | |
+0 | -0 | +0 | |
-0 | +0 | -0 | |
-0 | -0 | +0 | |
+∞ | +∞ | QNAN | INVALID |
+∞ | -∞ | +∞ | |
-∞ | +∞ | -∞ | |
-∞ | -∞ | QNAN | INVALID |
SNAN | any value | QNAN | INVALID |
any value | SNAN | QNAN | INVALID |
QNAN | non-SNAN | QNAN | |
non-SNAN | QNAN | QNAN |
Specifications for special values of the complex functions are defined according to the following formula
Sub(x1+i*y1,x2+i*y2) = (x1-x2) + i*(y1-y2).
Overflow in a complex function occurs (supported in the HA/LA accuracy modes only) when all RE(x), RE(y), IM(x), IM(y) arguments are finite numbers, but the real or imaginary part of the computed result is so large that it does not fit the target precision. In this case, the function returns ∞ in that part of the result, raises the OVERFLOW exception, and sets the VM Error Status to VML_STATUS_OVERFLOW (overriding any possible VML_STATUS_ACCURACYWARNING status).