 
      SUBROUTINE SCOPYM(N,SX,INCX,SY,INCY)
C***BEGIN PROLOGUE  SCOPYM
C***DATE WRITTEN   801001   (YYMMDD)
C***REVISION DATE  820801   (YYMMDD)
C***CATEGORY NO.  D1A5
C***KEYWORDS  BLAS,COPY,VECTOR
C***AUTHOR  KAHANER,DAVID(NBS)
C***PURPOSE  Copy negative of real SX to real SY.
C***DESCRIPTION
C
C       Description of Parameters
C           The * Flags Output Variables
C
C       N   Number of elements in vector(s)
C      SX   Real vector with N elements
C    INCX   Storage spacing between elements of SX
C      SY*  Real negative copy of SX
C    INCY   Storage spacing between elements of SY
C
C      ***  Note that SY = -SX  ***
C
C  Copy negative of real SX to real SY.  For I=0 to N-1,
C   copy  -SX(LX+I*INCX) to SY(LY+I*INCY), where LX=1 if
C   INCX .GE. 0, else LX = (-INCX)*N, and LY is defined
C   in a similar way using INCY.
C***REFERENCES  (NONE)
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  SCOPYM
