patches/glibc/2.7/170-use_short_for_fnstsw.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jan 03 17:36:54 2010 +0100 (2010-01-03)
changeset 1681 cc8ac5ca65aa
parent 612 fc9588d57c0f
permissions -rw-r--r--
samples: add a new samples for the TI DaVinci processors.

Dragan Marinkovic <marinkovic.dragan@gmail.com> wrote:
I finally had the time (and board) to spend some time with
crosstool-NG version 1.5.2 and TMS320DM6446 (DaVinci Digital Media
System-on-Chip,
http://focus.ti.com/docs/prod/folders/print/tms320dm6446.html).

I was able to successfully build and run v2.6.27-davinci1 kernel
(Kevin Hilman's branch) with busybox based initramfs on it. I don't
believe that any later kernel would represent any challenge (it just
happens that I'm currently working with this version). What a thrill
:).

crosstool-NG/toolchain config is attached. It may be useful to someone
using crosstool-NG ...
     1 Original patch from H.J. Lu, as reported there:
     2 http://www.nabble.com/PATCH:-Use-short-for-fnstsw-td14775171.html
     3 
     4 fnstsw stores 16bit into %ax. The upper 16bit of %eax is unchanged.
     5 The new assembler (binutils-2.18.50.0.4 and up) will disallow "fnstsw %eax".
     6 
     7 diff -dur glibc-2.7.orig/sysdeps/i386/fpu/ftestexcept.c glibc-2.7/sysdeps/i386/fpu/ftestexcept.c
     8 --- glibc-2.7.orig/sysdeps/i386/fpu/ftestexcept.c	2004-03-05 11:14:48.000000000 +0100
     9 +++ glibc-2.7/sysdeps/i386/fpu/ftestexcept.c	2008-06-24 10:54:43.000000000 +0200
    10 @@ -26,7 +26,7 @@
    11  int
    12  fetestexcept (int excepts)
    13  {
    14 -  int temp;
    15 +  short temp;
    16    int xtemp = 0;
    17  
    18    /* Get current exceptions.  */