摘要:
Data transfer between processors is efficiently performed in a multiprocessor including a shared cache memory. Each entry in a tag storage section 220 of a cache memory holds a reference number field 224 in addition to a tag address field 221, a valid field 222, and a dirty field 223. The reference number field 224 is set in a data write, and the value thereof is decremented after each read access. When the value of the reference number field 224 is changed from “1” to “0”, the entry is invalidated without performing a write-back operation. When the cache memory is used for communication between processors in the multiprocessor system, the cache memory functions as a shared FIFO, and used data is automatically deleted.
摘要:
Data transfer between processors is efficiently performed in a multiprocessor including a shared cache memory. Each entry in a tag storage section 220 of a cache memory holds a reference number field 224 in addition to a tag address field 221, a valid field 222, and a dirty field 223. The reference number field 224 is set in a data write, and the value thereof is decremented after each read access. When the value of the reference number field 224 is changed from “1” to “0”, the entry is invalidated without performing a write-back operation. When the cache memory is used for communication between processors in the multiprocessor system, the cache memory functions as a shared FIFO, and used data is automatically deleted.
摘要:
Disclosed herein is a floating-point number arithmetic circuit for efficiently supplying data to be performed arithmetic operation. The floating-point number arithmetic circuit includes an floating-point number arithmetic unit for performing a predetermined floating-point number arithmetic operation on a floating-point number of a predetermined precision, and a converting circuit for converting data into the floating-point number of predetermined precision and supplying the floating-point number of the predetermined precision to at least either one of input terminals of the floating-point number arithmetic unit.
摘要:
Disclosed herein is a floating-point number arithmetic circuit for efficiently supplying data to be performed arithmetic operation. The floating-point number arithmetic circuit includes an floating-point number arithmetic unit for performing a predetermined floating-point number arithmetic operation on a floating-point number of a predetermined precision, and a converting circuit for converting data into the floating-point number of predetermined precision and supplying the floating-point number of the predetermined precision to at least either one of input terminals of the floating-point number arithmetic unit.
摘要:
In a hole examining device, an examination head (105) is supported to be movable in an X direction and a Y direction which are orthogonal to each other, measurement heads (125, 126) are supported to be movable in a Z direction which is orthogonal to the X direction and the Y direction with respect to the examination head (105), and a plurality of first measurers (127) and a plurality of second measurers (128) are arranged in the measurement heads (125, 126) in parallel and may be held at an advance position which advances as well as retreats with respect to the Z direction, thereby improving workability of an examining operation.
摘要:
There are provided processes for the preparation of .gamma.-methacryloxypropylsilane compounds which comprise carrying out the reaction of allyl methacrylate with a hydrosilane compound in the presence of a platinum catalyst, while allowing at least one of a hindered phenol compound and an aromatic amine compound to coexist in the reaction system with an alkylamine compound or an amide compound, or with a gas containing molecular oxygen, or with a phenol compound having an aminoalkylene group. By using these processes as provided, gelation of the reaction mixture in the reaction system and during the course of purification thereof by distillation can effectively be avoided, and the desired .gamma.-methacryloxypropylsilane compounds can be obtained in good yield.
摘要:
In a hole examining device, an examination head (105) is supported to be movable in an X direction and a Y direction which are orthogonal to each other, measurement heads (125, 126) are supported to be movable in a Z direction which is orthogonal to the X direction and the Y direction with respect to the examination head (105), and a plurality of first measurers (127) and a plurality of second measurers (128) are arranged in the measurement heads (125, 126) in parallel and may be held at an advance position which advances as well as retreats with respect to the Z direction, thereby improving workability of an examining operation.
摘要:
A processor includes a plurality of executing sections configured to simultaneously execute instructions for a plurality of threads, an instruction issuing section configured to issue instructions to the plurality of executing sections, and an instruction sync monitoring section configured to, when an instruction-synchronizing instruction is issued to one or more of the plurality of executing sections from the instruction issuing section, monitor completion of execution of the instruction-synchronizing instruction for each of the executing sections, to which the instruction-synchronizing instruction has been issued, thus detecting completion of execution of preceding instructions for the thread to which the instruction-synchronizing instruction belongs. After issuing the instruction-synchronizing instruction, the instruction issuing section stops issuance of succeeding instructions for the thread to which the instruction-synchronizing instruction belongs, until the completion of execution of the preceding instructions for the thread to which the instruction-synchronizing instruction belongs is detected by the instruction sync monitoring section.
摘要:
A transfer molding machine for encapsulation of semiconductor devices with a resin comprises a clamping mechanism with an electrically actuated toggle mechanism, a pair of upper and lower sections of a transfer mold, and at least one compensation unit including upper and lower plates and a plurality of elastic members held between said upper and lower plates. The compensation unit is arranged either between the upper stationary platen and the upper mold section or between the moving platen and the lower mold section to compensate the dimensional errors in the mold sections and clamping mechanism.
摘要:
A laser recording apparatus includes a laser optical unit having an integral combination of a laser for emitting a laser beam and an optical system for converting the laser beam into an expanded and collimated beam; a deflector unit for directly receiving the laser beam emergent from the laser optical unit and directing the laser beam toward a recording medium; a photoreceptor unit having an integral combination of a reflecting member for reflecting the laser beam deflected by the deflector unit and a photoreceptor for receiving the laser beam reflected by the reflecting member; a support member having standard portions respectively for mounting the laser optical unit, the deflector unit and the photoreceptor unit.