Honored ContributorI hope someone can help with this. I've not been able to google my way out of this problem. I want to convert floating point numbers to single precision in hex and storing it in some file for initializing memory and then inputting this data to floating point IPs for further processing. Could anyone suggest any tools available to do this?
Thanks.
Honored ContributorIn my understanding IEEE floating point format and "single precision" are synonymous. I guess, you're referring to numbers in ASCII string representation?
Honored ContributorHere's an example of what I'm trying to do:
Decimal Number: 6.8 Single Precision 32-bit representation(IEEE-754) of 6.8: 40D99999Honored ContributorI think the best way may be write a small program in your favorite programming language to perform the conversion and write the MIF file. Beware of endianess issues.
Another possible alternative (I'm not familiar with FP in Verilog nor VHDL) is to do whatever you need in HDL. You can infer a ROM by declaring an array that is only read synchronously using the "initial" block to initialize it. Quartus can handle complex initialization blocks, including reading from filesHonored ContributorBut isn't any such function available in Excel or any prewritten program available for anything like this? I thought this would be a fairly day to day task for most HDL coding.
Honored Contributornot a ton of DSP or floating point talk on this board, so you may try searching elsewhere. first result i found seemed good:
http://babbage.cs.qc.edu/ieee-754/decimal.htmlHonored Contributor@thepancake, thanks for the link. But the link only lets you enter one number at a time and then calculate it. I wanted to convert numbers in a given file to their IEEE-754 representation.
Honored ContributorOne option is to use to_float function from IEEE float_pkg to convert real constants to IEEE float format in VHDL.
Honored ContributorBy any luck is there any such thing in Verilog? (*Fingers Crossed*)
Honored Contributorif you write a C program to printf %x a floating point variable what happens?
Honored ContributorIt just ate my long answer, so here is the short one... in 'C'
float value = 6.8; printf("%08X",*(unsigned int *)(&value)) ; 40D9999 No conversion needed, just a reinterpretation of the representation.
