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patches/gcc/4.2.3/300-fortran-signed-TImode.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 677 3505660ff419
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Fix building gfortran for ARM.

     2 http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01010.html

     3 ----

     4 

     5 The patch below fixes a crash building libgfortran on arm-linux-gnueabi.

     6 

     7 This target doesn't really have a 128-bit integer type, however it does use 

     8 TImode to represent the return value of certain special ABI defined library 

     9 functions. This results in type_for_size(TImode) being called.

    10 

    11 Because TImode deosn't correspond to any gfortran integer kind 

    12 gfc_type_for_size returns NULL and we segfault shortly after.

    13 

    14 The patch below fixes this by making gfc_type_for_size handle TImode in the 

    15 same way as the C frontend.

    16 

    17 Tested on x86_64-linux and arm-linux-gnueabi.

    18 Applied to trunk.

    19 

    20 Paul

    21 

    22 2007-05-15  Paul Brook  <paul@codesourcery.com>

    23 

    24     gcc/fortran/

    25     * trans-types.c (gfc_type_for_size): Handle signed TImode.

    26 

    27 diff -durN gcc-4.2.3.old/gcc/fortran/trans-types.c gcc-4.2.3/gcc/fortran/trans-types.c

    28 --- gcc-4.2.3.old/gcc/fortran/trans-types.c	2007-08-31 10:27:50.000000000 +0200

    29 +++ gcc-4.2.3/gcc/fortran/trans-types.c	2008-07-17 09:54:20.000000000 +0200

    30 @@ -1799,6 +1799,13 @@

    31  	  if (type && bits == TYPE_PRECISION (type))

    32  	    return type;

    33  	}

    34 +

    35 +	/* Handle TImode as a special case because it is used by some backends

    36 +	   (eg. ARM) even though it is not available for normal use.  */

    37 +#if HOST_BITS_PER_WIDE_INT >= 64

    38 +	if (bits == TYPE_PRECISION (intTI_type_node))

    39 +	  return intTI_type_node;

    40 +#endif

    41      }

    42    else

    43      {
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