patches/glibc/2.6/160-use_short_for_fnstsw.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Aug 23 10:38:15 2010 +0200 (2010-08-23)
changeset 2098 9a8f0e3fe605
parent 607 aaf7ae5cb11a
permissions -rw-r--r--
debug/gdb: companion libs are not used

Although the gdb ./configure advertises for GMP and MPFR, those libraries
are not used by gdb (the ./configure is used across different packages,
hence the check for GMP/MPFR). See:
http://sourceware.org/ml/crossgcc/2010-08/msg00168.html

The same applies to MPC.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
yann@607
     1
Original patch from H.J. Lu, as reported there:
yann@607
     2
http://www.nabble.com/PATCH:-Use-short-for-fnstsw-td14775171.html
yann@607
     3
yann@607
     4
fnstsw stores 16bit into %ax. The upper 16bit of %eax is unchanged.
yann@607
     5
The new assembler (binutils-2.18.50.0.4 and up) will disallow "fnstsw %eax".
yann@607
     6
yann@607
     7
diff -dur glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c
yann@607
     8
--- glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c	2004-03-05 11:14:48.000000000 +0100
yann@607
     9
+++ glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c	2008-06-24 10:56:14.000000000 +0200
yann@607
    10
@@ -26,7 +26,7 @@
yann@607
    11
 int
yann@607
    12
 fetestexcept (int excepts)
yann@607
    13
 {
yann@607
    14
-  int temp;
yann@607
    15
+  short temp;
yann@607
    16
   int xtemp = 0;
yann@607
    17
 
yann@607
    18
   /* Get current exceptions.  */