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Method and apparatus for performing a pixel averaging instruction

机译:用于执行像素平均指令的方法和设备

摘要

In an embodiment, a functional unit including a compressor section and a 36-bit SIMD adder is used to perform a SIMD four-pixel averaging instruction. The functional unit generates four four-pixel averages. Four pixel values and a rounding value are compressed into a sum and a carry vector. The tow least significant bits of the sum vector and the LSB of the carry vector are dropped before being input to the 36-bit SIMD adder. The two resultant 8-bit vectors are added by the 36-bit adder to directly generate the average pixel value result.
机译:在一个实施例中,包括压缩器部分和36位SIMD加法器的功能单元被用于执行SIMD四像素平均指令。功能单元生成四个四个像素的平均值。四个像素值和一个舍入值被压缩为总和和进位向量。和向量的两个最低有效位和进位向量的LSB在输入到36位SIMD加法器之前被丢弃。 36位加法器将两个所得的8位矢量相加,以直接生成平均像素值结果。

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