About TModj.1

TModj.1 · 2021-08-03

I need to inline some simple functions for a reverb pedal project, but ran into a bug regarding the reuse of registers and the 'umull' and 'smull' instruction. I am using a cortex M4 with a single cycle UMULL so, I should be able to use the same reg...

TModj.1 · 2021-08-04

I agree that the register usage definition are not proper, as it has no destination register. something like// asm( " instruction " : destination_regs : source_regs : clobber_regs ) asm(" umull %[yy],%[xx],%[xx],%[yy]" : [xx] "=r" (x) : [xx] (x)...

TModj.1 · 2020-10-24

Here is a link to my STM32G701 based OSD project with a schematic, It also has a reference F722 flight controller design. Hope it helps.https://www.moddquad.com/Quad video of the OSD/FChttps://youtu.be/MtMT04ecjL4

User statistics

User Activity

This is a STM32CubeIDE question, or GCC issue regarding the inline asm() and a cortex m4. rdhi and rdlo must be different for UMULL instruction, but not for the SMULL instruction for some reason.

Re: This is a STM32CubeIDE question, or GCC issue regarding the inline asm() and a cortex m4. rdhi and rdlo must be different for UMULL instruction, but not for the SMULL instruction for some reason.

Re: Vector Graphics for HUD/OSD