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From: | Georg-Johann Lay |
Subject: | Re: [avr-libc-dev] the latest release? |
Date: | Mon, 03 Sep 2012 09:02:09 +0200 |
User-agent: | Thunderbird 2.0.0.24 (Windows/20100228) |
Joerg Wunsch schrieb:
As Ivan Shmakov wrote:Supports “long” integers' arithmetics, as well as fixed and floating point numbers,Well, that's more a feature of the compiler. Perhaps you want to replace the “long” by `64-bit' to be more exact? (Though AVR-GCC's 64-bit support, while working, is not its brightest side, arguably.)
The 64-bit integer support has been improved with the avr-gcc 4.7 release series, see the 4.7 release notes http://gcc.gnu.org/gcc-4.7/changes.html#avr For technical details cf. http://gcc.gnu.org/viewcvs?view=revision&revision=182794 http://gcc.gnu.org/viewcvs?view=revision&revision=182160 http://gcc.gnu.org/viewcvs?view=revision&revision=181551 This leads to the paradoxical situation that for specific values the 64-bit division routine works faster than the 32-bit division routine for these values.
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