Graphical rendering pipeline having double precision fused multiply-add functional unit(DFMA)
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机译:具有双精度融合乘加功能单元(DFMA)的图形渲染管线
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摘要
A functional unit is added to a graphics processor to provide direct support for double-precision arithmetic, in addition to the single-precision functional units used for rendering. The double-precision functional unit can execute a number of different operations, including fused multiply-add, on double-precision inputs using data paths and/or logic circuits that are at least double-precision width. The double-precision and single-precision functional units can be controlled by a shared instruction issue circuit, and the number of copies of the double-precision functional unit included in a core can be less than the number of copies of the single-precision functional units, thereby reducing the effect of adding support for double-precision on chip area.
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