rscl: scale vector by reciprocal

Functions
subroutine	csrscl (n, sa, sx, incx)
	CSRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine	drscl (n, sa, sx, incx)
	DRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine	srscl (n, sa, sx, incx)
	SRSCL multiplies a vector by the reciprocal of a real scalar.
subroutine	zdrscl (n, sa, sx, incx)
	ZDRSCL multiplies a vector by the reciprocal of a real scalar.

Detailed Description