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Re: [avr-gcc-list] 16-bit math

From: Joerg Wunsch
Subject: Re: [avr-gcc-list] 16-bit math
Date: Sun, 14 Oct 2007 15:44:42 +0200 (MET DST)

"Manne Tallmarken" <address@hidden> wrote:

> It seems that avr-libc have support for 16-bit math calculations for
> 8-bit controllers. This is really fantastic!

Actually, it's the compiler supporting it, not avr-libc.  It supports
integer calculations up to 64 bits, and floating-point calculations
using IEEE 754 32-bit numbers.  There's a support library (that
technically belongs to the compiler, rather to avr-libc) for some
operations, and as some parts of it are auto-generated, it's known to
not be very effective for 32-bit and 64-bit integer operations, but
it's fully working nevertheless.

cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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