Titanium Assembler Bug?

Hello,

I have a question for ARM experts. I wanted to check the Titanium NEON performance with FracCollection:FracNEON

http://www.mikusite.de/pages/riscos.htm

However there is an error that Titanium A15 does not have instruction VDPL

I then checked with “old” Pi 2 A7 and it works. Both A7 and A15 have VFPv4 so there should be no difference.

Pi 3 A53 also works – even though running in legacy 32-bit mode.

Could it be a bug in the VFPSupport module only happening for A15? Or a bug in the AM5728?

Thanks
Lothar

From BASIC 1.68 onwards the mnemonic accepted by BASIC was corrected to be VDUP. This version of BASIC is in the RISC OS 5.24 stable release, so perhaps your Pi is running an earlier version? Titanium ships with BASIC 1.75 in ROM.

It’s good to know that. I must correct the VFP StrongHelp manual, and I also have a BASIC crunching program that needs to take it into account.

As beeing the author of those test programs, good to know that ! I’m still running quite old BASIC V1.61 on my PI3, so I didn’t notice…so it’s VDUP finally ? Why not keep VDPL also to have a backwards compatibility ?

@Lothar: As the others said, for a fast fix, just search and replace VDPL with VDUP.

Pi is running the latest RISC OS Pico which still has BASIC V1.63 so this explains it. Until Pico is updated I guess RMEnsure is required to make a NEON program run on both RISC OS 5.24 and latest Pico

> just search and replace VDPL with VDUP

I tried this with the current RISC OS Pi 5.24 and it still gives “no such mnemonic”

@Lotar: Can you post the full line of code that gives the error ?

It seems I made some mistake. I tried again and now it works.