Elbrush International Limited

Alexander M Artyomov

Yuli Kh Sakhin

Leonid N Nazarov

Vladimir V Rudometov

Alexey P Lizorkin

An unpacking circuit and operating method in a very long instruction word (VLIW) processor provides for parallel handling of a packed wide instruction in which a packed wide instruction is divided into groups of syllables. An unpacked instruction representation includes a plurality of syllables, which generally correspond to operations for execution by an execution unit. The syllables in the unpacked instruction representation are assigned to groups. The packed instruction word includes a sequence of syllables and a header. The header includes a descriptor for each group. The descriptor includes a mask and may include a displacement designator. The multiple groups are handled in parallel as the displacement designator identifies a starting syllable. The mask designates the syllables which are transferred from the packed instruction to the unpacked representation and identifies the position of NOPs in the unpacked representation.

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Moscow, Russia

Alexander M Artyomov