v?Expm1

Syntax

call vsexpm1( n, a, y )

call vmsexpm1( n, a, y, mode )

call vdexpm1( n, a, y )

call vdexpm1( n, a, y, mode )

Name	Type	Description
n	INTEGER, INTENT(IN)	Specifies the number of elements to be calculated.
a	DOUBLE PRECISION for vdexpm1, vmdexpm1 REAL, INTENT(IN) for vsexpm1, vmsexpm1 DOUBLE PRECISION, INTENT(IN) for vdexpm1, vmdexpm1	Array that specifies the input vector a.
mode	INTEGER(KIND=8), INTENT(IN)	Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Name

Type

Description

n

INTEGER, INTENT(IN)

Specifies the number of elements to be calculated.

a

DOUBLE PRECISION for vdexpm1, vmdexpm1

REAL, INTENT(IN) for vsexpm1, vmsexpm1

DOUBLE PRECISION, INTENT(IN) for vdexpm1, vmdexpm1

Array that specifies the input vector a.

mode

INTEGER(KIND=8), INTENT(IN)

Overrides global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Precision Overflow Thresholds for Expm1 Function
Data Type	Threshold Limitations on Input Parameters
single precision	`a[i] < Ln( FLT_MAX )`
double precision	`a[i] < Ln( DBL_MAX )`

Name	Type	Description
y	DOUBLE PRECISION for vdexpm1, vmdexpm1 REAL, INTENT(OUT) for vsexpm1, vmsexpm1 DOUBLE PRECISION, INTENT(OUT) for vdexpm1, vmdexpm1	Array that specifies the output vector y.

Name

Type

Description

y

DOUBLE PRECISION for vdexpm1, vmdexpm1

REAL, INTENT(OUT) for vsexpm1, vmsexpm1

DOUBLE PRECISION, INTENT(OUT) for vdexpm1, vmdexpm1

Array that specifies the output vector y.

The v?Expm1 function computes an exponential of vector elements decreased by 1.

Special Values for Real Function v?Expm1(x)
Argument	Result	VM Error Status	Exception
+0	+0
-0	+0
X > overflow	+∞	VML_STATUS_OVERFLOW	OVERFLOW
+∞	+∞
-∞	-1
QNAN	QNAN
SNAN	QNAN		INVALID