Apparatus for performing simplified decimal multiplication by st

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364754, G06F 752

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active

046150161

ABSTRACT:
Processor apparatus is described for performing binary and decimal arithmetic operations. In performing decimal multiplication with the processor apparatus, to reduce the amount of processing to be done with the apparatus and thereby speed up the performance of the decimal multiplication, the leading zeroes prefixing the highest order significant digit in both a multiplier and a multiplicand are identified, counted and removed. Decimal multiplication is then performed using the stripped multiplier and multiplicand, and to the resultant partial product a number of zeroes are prefixed equal to the number of zeroes originally stripped from the multiplier and multiplicand. The result is the product of the original multiplier and multiplicand.

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Franklin, "Zoned Decimal Arithmetic" IBM Tech. Disclosure Bulletin, vol. 15, No. 7, Dec. 1972, pp. 2123-2124.

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