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[avr-gcc-list] Zeroing longs: use memset for -Os?
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From: |
Ben Jackson |
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Subject: |
[avr-gcc-list] Zeroing longs: use memset for -Os? |
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Date: |
Fri, 29 Jul 2005 00:07:23 -0700 |
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User-agent: |
Mutt/1.5.6i |
Due to the size of sts instructions, it's actually fewer bytes to
memset(&somelong, 0, sizeof(long)). The memset is 12 bytes (count,
hi, lo, sts, dec, loop, all 2 bytes) vs 16 for 4 straight sts's.
If you're doing more than one variable of course the savings are
bigger.
--
Ben Jackson
<address@hidden>
http://www.ben.com/
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