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| From: | Georg-Johann Lay |
| Subject: | Re: [avr-libc-dev] I just noticed OPTIMIZE_SPEED |
| Date: | Thu, 8 Dec 2016 14:42:33 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
On 06.12.2016 23:59, Joerg Wunsch wrote:
As George Spelvin wrote:Perhaps the two different reduction-mod-5 schemes should depend on OPTIMIZE_SPEED?Doesn't really matter much. Since the library is pre-compiled, you cannot map it to the user's -Ox compiler option anyway. As Johann already explained, most AVR users care for saved flash and RAM more than for saving a few CPU cycles.
Skimming generated code, IMO modules like vfprintf should be compiled with -mcall-prologues; at least the versions that supply float support (as many float functions use call-prologues anyway). Johann
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