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Instruction set for controlling a processor to convert linear data to logarithmic data in a single instruction that define the exponent filed of the logarithmic value

  • US 6,529,922 B1
  • Filed: 12/22/1998
  • Issued: 03/04/2003
  • Est. Priority Date: 07/02/1997
  • Status: Expired due to Term
First Claim
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1. A method for converting data from linear format to logarithmic format comprising the steps of:

  • receiving into a processor, an instruction, said instruction comprising;

    an instruction opcode for directing said processor to convert a linear format of a number to a logarithmic format, said logarithmic format of said number including an exponent field and a mantissa field;

    a first address for specifying a first operand comprising a linear format of said number; and

    a second address for specifying a second operand, said second operand indicative of a desired exponent field width to hold a maximum exponent value; and

    converting said linear format of said number to a logarithmic format, said logarithmic format including an exponent field having a width, said width being dependent upon said desired exponent filed width.

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