Abstract: A code generating system generates, from code in a program, native code that is executable by a computer system. The code generating system may be included in a just-in-time compiler used to generate native code that is executable by a computer system, from a program in Java Byte Code form, and specifically generates, in response to Java Byte Code representative of a synchronization statement that synchronizes access by multiple threads of execution to at least one variable contained in the Java Byte code, one or more native code instructions that implements a wait-free synchronization methodology to synchronization access to the at least one variable. Since the instructions which implement the wait-free synchronization methodology do not require calls to the operating system, they can generally be processed more rapidly than other synchronization techniques which do require operating system calls.

Abstract: A processor processes a segmented to linear virtual address conversion instruction to convert segmented virtual addresses in a segmented virtual address space to a linear virtual address in a linear virtual address space. The segmented virtual address space comprises a plurality of segments each identified by a segment identifier, each segment comprising at least one page identified by a page identifier. The linear virtual address space includes a plurality of pages each identified by a page identifier. In processing the segmented to linear virtual address conversion instruction, the processor uses a plurality of segmented to linear virtual address conversion descriptors, each associated with a page in the segmented virtual address space, each segmented to linear virtual address conversion descriptor identifying the page identifier of one of the pages in the linear virtual address space.