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# Copyright (C) 2002, 2003, 2005, 2006, 2007, 2008

# Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with GCC; see the file COPYING3.  If not see

# .

# Please email any bugs, comments, and/or additions to this file to:

# gcc-patches@gcc.gnu.org

# Globals.

global compat_use_alt

global compat_same_alt

global compat_have_dfp

global compat_skip_list

# This file defines procs for determining features supported by both C

# compilers for compatibility tests.

load_lib target-supports.exp

#

# compat-use-alt-compiler -- make the alternate compiler the default

#

proc compat-use-alt-compiler { } {

    global GCC_UNDER_TEST ALT_CC_UNDER_TEST

    global compat_same_alt

    # We don't need to do this if the alternate compiler is actually

    # the same as the compiler under test.

    if { $compat_same_alt == 0 } then {

        set GCC_UNDER_TEST $ALT_CC_UNDER_TEST

    }

}

#

# compat-use-tst-compiler -- make compiler under test the default

#

proc compat-use-tst-compiler { } {

    global GCC_UNDER_TEST compat_save_gcc_under_test

    global compat_same_alt

    # We don't need to do this if the alternate compiler is actually

    # the same as the compiler under test.

    if { $compat_same_alt == 0 } then {

        set GCC_UNDER_TEST $compat_save_gcc_under_test

    }

}

# Find out whether both compilers support decimal float types.

proc compat_setup_dfp { } {

    global compat_use_alt

    global compat_same_alt

    global compat_have_dfp

    verbose "compat_setup_dfp: $compat_use_alt $compat_same_alt" 2

    # Does the compiler under test support decimal float types?

    compat-use-tst-compiler

    set compat_have_dfp [check_effective_target_dfprt_nocache]

    verbose "compat_have_dfp for tst compiler: $compat_have_dfp" 2

    # If there is an alternate compiler, does it support decimal float types?

    if { $compat_have_dfp == 1 && $compat_use_alt == 1 && $compat_same_alt == 0 } {

        compat-use-alt-compiler

        set compat_have_dfp [check_effective_target_dfprt_nocache]

        compat-use-tst-compiler

        verbose "compat_have_dfp for alt compiler: $compat_have_dfp" 2

    }

    # If decimal float is not supported, add it to the skip list, which

    # affects code in the header files.

    if { $compat_have_dfp == 0 } {

        global compat_skip_list

        lappend compat_skip_list "DECIMAL_FLOAT"

    }

}

# If either compiler does not support decimal float types, skip this test.

proc dg-require-compat-dfp { args } {

    global compat_have_dfp

    if { $compat_have_dfp == 0 } {

        upvar dg-do-what dg-do-what

        set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]

    }

}