Deploy a Decimal FP co-processor with openJDK, is it possible?
volker.simonis at gmail.com
Mon Mar 23 06:32:12 PDT 2009
As a starting point, you can have a look at the webrev for:
6622432: RFE: Performance improvements to java.math.BigDecimal
which is a performance improvement for BigDecimal. This implies that
the BigDecimal implementation is in the OpenJDK.
In order to gain full advantage of your FP-coporocessor, you would
probably have to natively reimplement or intrinsify some of the
methods of BigDecimal. This will however probably only pay off for big
On 3/23/09, tarekeldeeb <tarekeldeeb at msn.com> wrote:
> Hello community,
> I work for SilMinds; a company that provides Decimal floating point IP
> cores. We are currently building up a pilot application for our customers as
> well. Our decimal floating point unit is compliant with IEEE 754-2008
> standard. Executing decimal arithmetic routines on hardware shows a
> delay-energy boost of 500X.
> I want to patch the openJDK so that all Decimal data types are executed on
> my hardware co-processor. Java applications shall be accelerated without
> recoding or even re-compiling.
> I have some basic questions:
> 1- What are all decimal datatypes? java.math.BigDecimal ? other string
> representations ?
> 2- Is there any java conversion functions to be IEEE 754-2008 compliant?
> 3- I know that not all the JDK is open, is this correct? Is the arithmetic
> part -including the BigDecimal- open ?
> 4- What documents shall I start with to override the default arithmetic
> routines and deploy my hardware ?
> 5- Do you have any personal hints or suggestions towards what I had said ?
> I appreciate any clues or information.
> Thanks in advance,
> View this message in context: http://www.nabble.com/Deploy-a-Decimal-FP-co-processor-with-openJDK%2C-is-it-possible--tp22621754p22621754.html
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