1#   Copyright (C) 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
2
3# This program is free software; you can redistribute it and/or modify
4# it under the terms of the GNU General Public License as published by
5# the Free Software Foundation; either version 2 of the License, or
6# (at your option) any later version.
7#
8# This program is distributed in the hope that it will be useful,
9# but WITHOUT ANY WARRANTY; without even the implied warranty of
10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11# GNU General Public License for more details.
12#
13# You should have received a copy of the GNU General Public License
14# along with this program; if not, write to the Free Software
15# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16
17# Please email any bugs, comments, and/or additions to this file to:
18# gcc-patches@gcc.gnu.org
19
20# Globals.
21
22global compat_use_alt
23global compat_same_alt
24global compat_have_dfp
25global compat_skip_list
26
27# This file defines procs for determining features supported by both C
28# compilers for compatibility tests.
29
30load_lib target-supports.exp
31
32#
33# compat-use-alt-compiler -- make the alternate compiler the default
34#
35proc compat-use-alt-compiler { } {
36    global GCC_UNDER_TEST ALT_CC_UNDER_TEST
37    global compat_same_alt
38
39    # We don't need to do this if the alternate compiler is actually
40    # the same as the compiler under test.
41    if { $compat_same_alt == 0 } then {
42	set GCC_UNDER_TEST $ALT_CC_UNDER_TEST
43    }
44}
45
46#
47# compat-use-tst-compiler -- make compiler under test the default
48#
49proc compat-use-tst-compiler { } {
50    global GCC_UNDER_TEST compat_save_gcc_under_test
51    global compat_same_alt
52
53    # We don't need to do this if the alternate compiler is actually
54    # the same as the compiler under test.
55
56    if { $compat_same_alt == 0 } then {
57	set GCC_UNDER_TEST $compat_save_gcc_under_test
58    }
59}
60
61# Find out whether both compilers support decimal float types.
62proc compat_setup_dfp { } {
63    global compat_use_alt
64    global compat_same_alt
65    global compat_have_dfp
66
67    verbose "compat_setup_dfp: $compat_use_alt $compat_same_alt" 2
68    set compat_have_dfp 1
69    # If there is an alternate compiler, does it support decimal float types?
70    if { $compat_use_alt == 1 && $compat_same_alt == 0 } {
71	compat-use-alt-compiler
72	set compat_have_dfp [check_effective_target_dfprt_nocache]
73	compat-use-tst-compiler
74	verbose "compat_have_dfp for alt compiler: $compat_have_dfp" 2
75    }
76    # Does the compiler under test support it?
77    if { $compat_have_dfp == 1 } {
78	set compat_have_dfp [check_effective_target_dfprt_nocache]
79	verbose "compat_have_dfp for tst compiler: $compat_have_dfp" 2
80    }
81
82    # If decimal float is not supported, add it to the skip list, which
83    # affects code in the header files.
84    if { $compat_have_dfp == 0 } {
85	global compat_skip_list
86	lappend compat_skip_list "DECIMAL_FLOAT"
87    }
88}
89
90# If either compiler does not support decimal float types, skip this test.
91
92proc dg-require-compat-dfp { args } {
93    global compat_have_dfp
94    if { $compat_have_dfp == 0 } {
95	upvar dg-do-what dg-do-what
96	set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
97    }
98}
99