Boots – shoes – and leggings
Patent
1986-07-11
1988-08-02
Malzahn, David H.
Boots, shoes, and leggings
364760, G06F 752
Patent
active
047617560
ABSTRACT:
Disclosed is a signed multiplier for use in a data processing system that handles 2's complement operands. The signed multiplier operates to form a preliminary product independently of the signs of the multiplier and multiplicand. While the multiplication is in progress, the signs of the multiplier and multiplicand are checked. For multiplications where either one of the operands (multiplier or multiplicand) is negative, the preliminary product is modified by one or two correction factors. The correction factors are multiplies of the 2's complements of the operands. The correction factor or factors are added to the preliminary product to form the final product.
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patent: 4467444 (1984-08-01), Harmon, Jr. et al.
patent: 4507749 (1985-03-01), Ohhashi
Capps et al., "Two's Complement Multiplication", IBM Tech. Disclosure Bulletin, vol. 20, No. 12, May 1978, pp. 5292-5293.
Davby et al., "Two's Complement Multiplier", IBM Tech. Disclosure Bulletin, vol. 18, No. 5, Oct. 1975, pp. 1482-1483.
Robertson, "Two's Complement Multiplication in Binary Parallel Digital Computers", IRE-Trans.-Electronic Computers, Sep. 1955, pp. 118-119.
Lee Hsiao-Peng S.
Oneto John C.
Rawlinson Stephen J.
Amdahl Corporation
Malzahn David H.
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