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ASF code metrics for fixed-point square root?
Hi, I am interested in ASF's code metrics for fixed-point square root computation for unsigned 0.16 Q-format numbers, i.e. no integral bits and 16 fractional bits.Maximum absolute...
Friday, 5 October 2012 - 15:15
Atmel AVR Toolchain's fixed-points are broken?
Compiling the following void fi (int); void fc (char); int sf_to_int (short _Fract a) { return a; } signed char f_to_schar (_Fract a) { return a; } _Fract schar_to_f (signed...
Monday, 13 August 2012 - 21:19
What silicon supports LAT, LAC, LAS, XCH
Three questions concerning the above XMEGA instructions: 1) Are these instructions supported by all XMEGA devices? 2) Is it ensured that these instructions are not supported by...
Tuesday, 22 May 2012 - 11:38
Video: 25 years of GCC development
youtube: GCC Development History 1989-2012 Just aesthetically appealing how the source tree evolves. Enjoy.
Tuesday, 27 March 2012 - 17:21
ATtiny2313 computes 4000 digits of Pi. In C!
Some days ago I started a fun project to probe new GCC optimizations. It turned out that ATtiny2313 can compute 4000 digits of π using a vanilla C program and floats. Here is an...
Monday, 27 February 2012 - 21:38
avr-gcc: What names for the address spaces?
As you might already know, avr-gcc implements several intrinsic named address spaces. The names are __pgm, __pgm1, ..., __pgm5 and __pgmx. Eric proposed to use __flash as...
Saturday, 21 January 2012 - 19:58
avr-gcc 4.7.0 for the brave
I just built a new avr-gcc-4.7.0 snapshot for Win32. For hints on how to use and "install", see: https://www.avrfreaks.net/index.p... It contains:avr-gcc-4.7.0 (C/C++) SVN 182625...
Thursday, 22 December 2011 - 21:33
How to assembler a 24-bit integer in avr-as?
Hi, I'd like to assemble a 24-bit integer in avr-as as if it was generated from C code like const __pgmx char c = 1; const __pgmx char *pc = &c; and the assumption that __pgmx...
Sunday, 30 October 2011 - 11:00
avr-gcc and EIND on devices > 128k code memory
FYI, the avr-gcc manual now contains a description of how EIND is used by the compiler, see http://gcc.gnu.org/onlinedocs/gc... This discription applies for versions 4.6.2+ of the...
Tuesday, 25 October 2011 - 06:56
Information on AVR's skip bug?
Hi, some AVR cores suffer from the skip erratum, i.e. they have problems performing code like skip-instruction two-word-instruction with, e.g. skip-instruction: CPSE, SBRC,...
Wednesday, 13 July 2011 - 17:44
avr-gcc 4.6.1 and Link Time Optimization on Windows
Hi, I just did a Win32-build of avr-gcc-4.6.1 (release candidate) and am playing around with it. Trying to use link time optimization (LTO) I run into ld complaining about "...
Thursday, 23 June 2011 - 12:39
danni wrote: - 64 bit support not so enormous ressource gulping.Here is the 64 bit div: 3306 bytes! 00000696 00003306 T __udivdi3 To accomplish that, write the function in... Sunday, 29 May 2011 - 09:33