PURPOSE: To easily execute a digital differential analysis(DDA) with a simple constitution by performing the DDA by using a hardware multiplier accumulator.
CONSTITUTION: The output registers 410 to 414 of a multiplier accumulator are initialized via a CPU, etc. As for the incremental change value of the output value over the line of a prescribed length to be interpolated in a first input register 102, the value which is equal to the reciprocal of the line length is loaded into a second input register 104. The contents of the registers 102 and 104 is multiplied by a multiplication accumulator 408, the cumulative results of the addition of the accumulation of a fraction part, the overflow part and the integer part of the multiplication result and an overflow part via an adder 408 are stored in the registers 410 to 414, respectively, and the interpolation by the DDA is performed. By the execution of the DDA for which this hardware is used, a constitution is simplified and the execution of the DDA can be exactly performed without performing a division operation, etc.
| JPH02240782 | GRAPHIC PROCESSOR |
| JPH11192753 | PRINTER DEVICE |
| JP2010515154 | Object-relational visualization |
MARUKOMU ERITSUKU UIRUSON
SARA JIEIN ROIDO
