Hi all, In my VHDL design I need to operate using float. I think I am going to use FPU core of opencores. The problem is that I need to multiply unsigned integer (16 bits) with float (32 bits single precision floating point), so I suppose I have first to convert integer into float. What is the simplest way to do this conversion?Is there some library or core? The whole operation is: (it is use to calibrate Power received in a SFP) a_4(32 bit float) * rxPwr^4(16 bit unsigned integer) + a_3(32 bit float) * rxPwr^3(16 bit unsigned integer) + a_2(32 bit float) * rxPwr^2(16 bit unsigned integer) + a_1(32 bit float) * rxPwr(16 bit unsigned integer) + a_0(32 bit float) Thanks in advance -- Taho Dorta -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.opencores.org/forums.cgi/cores/attachments/20080313/215d86ca/attachment.htm

On an aside on the Rx power question, Put another way is this aX^4 + bX^3 + cX^2 + dX^1 + e, I seem to remember for school ( a long time ago ) that there is a real neat way of solving and calculating this . would that make the maths any easier ? -----Original Message----- From: cores-bounces at opencores.org [mailto:cores-bounces at opencores.org] On Behalf Of Taho Dorta Sent: 13 March 2008 08:56 To: cores at opencores.org Subject: [oc] FPU core Hi all, In my VHDL design I need to operate using float. I think I am going to use FPU core of opencores. The problem is that I need to multiply unsigned integer (16 bits) with float (32 bits single precision floating point), so I suppose I have first to convert integer into float. What is the simplest way to do this conversion?Is there some library or core? The whole operation is: (it is use to calibrate Power received in a SFP) a_4(32 bit float) * rxPwr^4(16 bit unsigned integer) + a_3(32 bit float) * rxPwr^3(16 bit unsigned integer) + a_2(32 bit float) * rxPwr^2(16 bit unsigned integer) + a_1(32 bit float) * rxPwr(16 bit unsigned integer) + a_0(32 bit float) Thanks in advance -- Taho Dorta No virus found in this incoming message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.21.7/1329 - Release Date: 14/03/2008 12:33 No virus found in this outgoing message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.21.7/1329 - Release Date: 14/03/2008 12:33 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.opencores.org/forums.cgi/cores/attachments/20080314/637108c7/attachment.htm