公开(公告)号：US07680990B2

公开(公告)日：2010-03-16

申请号：US10449442

申请日：2003-05-30

申请人： Donald C. Soltis ,  Dale C. Morris ,  Dean Ahmad Mulla ,  Achmed Rumi Zahir ,  Amy Lynn O'Donnell ,  Allan Douglas Knies

发明人： Donald C. Soltis ,  Dale C. Morris ,  Dean Ahmad Mulla ,  Achmed Rumi Zahir ,  Amy Lynn O'Donnell ,  Allan Douglas Knies

IPC分类号： G06F12/00 ,  G06F13/00 ,  G06F13/28

CPC分类号： G06F9/3004 ,  G06F9/30032 ,  G06F9/30087 ,  G06F9/30112 ,  G06F9/3834

摘要： Atomic sixteen-byte memory accesses are provided in a 64-bit system in which eight of the bytes are stored in a 64-bit general-purpose register and eight of the bytes are stored in a 64-bit special-purpose register. A 16-byte load instruction transfers the low eight bytes to an explicitly specified general-purpose register, while the high eight bytes are transferred to the special-purpose register. Likewise, a 16-byte store instruction transfers data from a general-purpose register and the special-purpose register. Also provided is an 8-byte compare conditioning a 16-byte exchange semaphore instruction that can be used to accelerate algorithms that use multiple processors to simultaneously read and update large databases.

摘要翻译： 在64位系统中提供原子十六字节的存储器访问，其中八个字节存储在64位通用寄存器中，八个字节存储在64位专用寄存器中。 一个16字节的加载指令将低8个字节传送到明确指定的通用寄存器，而高8个字节传送到专用寄存器。 同样，一个16字节的存储指令从通用寄存器和专用寄存器传送数据。 还提供了一个8字节比较调节16字节交换信号量指令，可用于加速使用多个处理器同时读取和更新大型数据库的算法。