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    • 6. 发明申请
    • SPLIT MULTIPLIER FOR EFFICIENT MIXED-PRECISION DSP
    • 有效的混合精密DSP的分路器
    • WO2003029954A2
    • 2003-04-10
    • PCT/IB2002/004035
    • 2002-09-30
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.
    • BURNS, Geoffrey, F.
    • G06F7/00
    • G06F7/5324G06F2207/382G06F2207/3828
    • A method and architecture with which to achieve efficient sub-word parallelism for multiplication resources is presented. In a preferred embodiment, a dual two's complement multiplier is presented, such that an n bit operandB can be split, and each portion of the operand B multiplied with another operand A in parallel. The intermediate products are combined in an adder with a compensation vector to correct any false negative sign on the two's complement sub-product from the multiplier handling the least significant, or lower, p bits of the split operand B, or B[p-1:0], where p=n/2. The compensation vector C is derived from the A and B operands using a simple circuit. The technique is easily extendible to 3 or more parallel multipliers, over which an n bit operand D can be split and multiplied with operand A in parallel. The compensation vector C' is similarly derived from the D and A operands inan analogous manner to the dual two's complement multiplier embodiment.
    • 提出了一种用于实现乘法资源的有效子字并行的方法和架构。 在优选实施例中,呈现双二进制补码乘法器,使得可以拆分n位操作数B,并且操作数B的每个部分并行地与另一个操作数A相乘。 中间产品在具有补偿向量的加法器中组合,以从处理分割操作数B的最低有效位或更低p位的乘数来校正二进制补码子乘积上的任何假负号,或者B [p-1 :0],其中p = n / 2。 补偿矢量C使用简单的电路从A和B操作数导出。 该技术可以容易地扩展到3个或更多个并行乘法器,通过该乘法器可以并行地将n位操作数D分割并与操作数A相乘。 补偿矢量C'类似地从双二进制补码乘法器实施例中衍生自D和A操作数。