Sharing float data between ARM and DSP in OMAP3530

Dave Winder15947

I have a need to get floating point data, type float, back and forth between the Arm and C64+. I know C64+ does not have FP hardware but it does have emulation libraries. I can not find any documentation of the format used. Arm side is IEEE compliant, right? Although the Arm manual doesn't show the format it references the spec I believe.

What about DSP emulation? Is that documented?

If they arent the same format, are there any libraries for converting?

TIA

Dave

over 15 years ago

0 Gagan Maur over 15 years ago

TI__Expert 8150 points

See Compiler User's Guide here: http://focus.ti.com/lit/ug/spru187o/spru187o.pdf
See 'Section 7.2 Object Representation' to understand the data format use. The RTS library does support IEEE representation for single and double precision floating point data.

Also, you may also want to consider the fastRTS library: http://focus.ti.com/docs/toolsw/folders/print/sprc122.html that provides more optimized representation of the floating point emulation kernels. The library also supports inlining of these emulation functions to allow better performance when emulating floating point on 64x+

Regards,
Gagan

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Sharing float data between ARM and DSP in OMAP3530