公开(公告)号：CA2719661A1

公开(公告)日：2011-01-18

申请号：CA2719661

申请日：2010-11-05

Applicant: IBM CANADA

Inventor： PATIL KISHOR V ,  KIELSTRA ALLAN H ,  LOW ANDREW R ,  MITRAN MARCEL ,  ROLLESTON GAVIN F ,  SHAM IVAN

IPC: G06F9/44 ,  G06F9/40 ,  G06F9/45

Abstract: An illustrative embodiment of a computer-implemented process for an enhanced function-descriptor-based dispatch in a multi-linkage environment receives user code containing a function compiled in a supplementary linkage convention of a caller to form an invoked function and determines whether the supplementary linkage convention of the caller for the invoked function matches a supplementary linkage implementation provided by a library. Responsive to a determination that the supplementary linkage convention of the caller for the invoked function matches a supplementary linkage implementation provided by the library, select the supplementary linkage implementation provided by the library and dispatch the invoked function in the selected supplementary linkage implementation provided by the library.

公开(公告)号：CA2831711A1

公开(公告)日：2015-04-30

申请号：CA2831711

申请日：2013-10-31

Applicant: IBM CANADA

Inventor： MITRAN MARCEL ,  VOKHSHOORI VISDA

IPC: G06F8/41 ,  G06F9/30

Abstract: An illustrative embodiment of a computer-implemented method for safe conditional operation when storage access cannot be proven safe, receives a portion of source code for a transaction by an enhanced compiler and analyzes the portion of source code received, by the enhanced compiler to determine whether the portion of source code analyzed by the enhanced compiler is a candidate for transformation. Responsive to a determination the portion of source code analyzed by the enhanced compiler is a candidate for transformation, the portion of source code analyzed is transformed to use a conditional operation in a first portion of transformed code, wherein a respective conditional operation uses hardware transaction memory to invoke retry operations within hardware and a branch is added, directed to an original code portion, in a second portion of transformed code, wherein code of the branch is a recovery portion containing the original code portion.

公开(公告)号：CA2684226A1

公开(公告)日：2011-04-30

申请号：CA2684226

申请日：2009-10-30

Applicant: IBM CANADA

Inventor： MITRAN MARCEL ,  PATIL KISHOR V ,  SIU JORAN S C ,  STOODLEY MARK G ,  SUNDARESAN VIJAY

IPC: G06F9/45

Abstract: A method for eliminating redundant operations establishing common properties is disclosed herein. In one embodiment, such a method may include identifying a first virtual register storing a first value having a common property. The method may assign the first virtual register to use a real register. The method may further identify a second virtual register storing a second value also having the common property. The method may assign the second virtual register to use the real register after the first value is no longer live. As a result of assigning the second virtual register to the first real register, the method may eliminate an operation configured to establish the common property for the second value since this operation is redundant and is no longer needed. A corresponding apparatus and computer program product are also disclosed and claimed herein.

公开(公告)号：CA2675666A1

公开(公告)日：2009-11-05

申请号：CA2675666

申请日：2009-08-27

Applicant: IBM CANADA

Inventor： SHEIKH ALI I ,  BOGSANYI FRANCIS J D ,  JOHNSON GRAEME ,  LOW ANDREW R ,  MITRAN MARCEL

IPC: G06F9/455

Abstract: The illustrative embodiments described herein provide a computer implemented method, apparatus, and computer program product for accelerating execution of a program, written in an object oriented programming language, in an emulated environment. In respons e to receiving a request for an accelerated communications session from a guest virtual machi ne in the emulated environment, a native virtual machine is initiated external to the emulated environment but within the computing device hosting the emulated environment. Thereafter, an accelerated communications link is established between the guest virtual machine and the native virtual machine. The accelerated communications link enables a transfer of managed code between the guest virtual machine and the native virtual machine. The managed code is th en executed by the native virtual machine.