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From: | Ram Kumar Rengaswamy |
Subject: | [avr-gcc-list] Fixed Registers -ffixed |
Date: | Fri, 18 Aug 2006 19:49:41 -0700 |
Hi,I need to prevent the C code from using a pair of registers that I wish to use in an assembly routine.
When I try to compile my application with the option -ffixed-r2 and - ffixed-r3, I get the following error:
error: can't find a register in class `BASE_POINTER_REGS' while reloading `asm'
Is there a work around to this problem or is it a limitation of the compiler ? Is there any particular set of registers that are better suited to be fixed than others ?
Thanks, -Ram
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