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Re: [avr-gcc-list] Legal registers

From: Russell Shaw
Subject: Re: [avr-gcc-list] Legal registers
Date: Sun, 05 Jun 2005 20:25:31 +1000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20050105 Debian/1.7.5-1

Ron wrote:
Hi All. Does it somewhere specify that avrgcc and its library routines
should only use a subset of the AVR registers (say 0,1,18-31), or can
the whole 32 be used if required? I ask because it would save a deal of
pushing and popping in a preemptive os if you knew for sure register
subset x would never be used.

Ron Kreymborg


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