1SDSDOT(1)                        BLAS routine                        SDSDOT(1)
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NAME

SYNOPSIS

7       REAL FUNCTION SDSDOT(N,SB,SX,INCX,SY,INCY)
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9           REAL      SB
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11           INTEGER   INCX,INCY,N
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13           REAL      SX(*),SY(*)
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15           DOUBLE    PRECISION DSDOT
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17           INTEGER   I,KX,KY,NS
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19           INTRINSIC DBLE
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21           DSDOT     = SB
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23           IF        (N.LE.0) GO TO 30
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25           IF        (INCX.EQ.INCY .AND. INCX.GT.0) GO TO 40
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27           KX        = 1
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29           KY        = 1
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31           IF        (INCX.LT.0) KX = 1 + (1-N)*INCX
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33           IF        (INCY.LT.0) KY = 1 + (1-N)*INCY
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35           DO        10 I = 1,N
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37           DSDOT     = DSDOT + DBLE(SX(KX))*DBLE(SY(KY))
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39           KX        = KX + INCX
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41           KY        = KY + INCY
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43           10        CONTINUE
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45           30        SDSDOT = DSDOT
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47           RETURN
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49           40        NS = N*INCX
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51           DO        50 I = 1,NS,INCX
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53           DSDOT     = DSDOT + DBLE(SX(I))*DBLE(SY(I))
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55           50        CONTINUE
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57           SDSDOT    = DSDOT
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59           RETURN
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61           END
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PURPOSE

64BLAS routine                     February 2007                       SDSDOT(1)