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# Copyright 2016-2020 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
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <>.
# This file is part of the gdb testsuite. It is intended to test that
# gdb could correctly handle floating point constant with a suffix.
standard_testfile .c
proc do_compile { {opts {}} } {
global srcdir subdir srcfile binfile
set ccopts {debug quiet}
foreach opt $opts {lappend ccopts "additional_flags=$opt"}
gdb_compile "${srcdir}/${subdir}/${srcfile}" "$binfile" executable $ccopts
if { [do_compile] != "" && [do_compile {-mfloat128}] != "" } {
untested "compiler can't handle __float128 type?"
return -1
clean_restart ${binfile}
if ![runto_main] then {
perror "couldn't run to breakpoint"
# Run to the breakpoint at return.
gdb_breakpoint [gdb_get_line_number "return"]
gdb_continue_to_breakpoint "return"
# Print the original value of ld and f128
gdb_test "print ld" ".* = 1\\.375.*" "the original value of ld is 1.375"
gdb_test "print f128" ".* = 2\\.375.*" "the original value of f128 is 2.375"
# Test that gdb could correctly recognize float constant expression with a suffix.
# FIXME: gdb does not yet recognize the GNU extension 'q' suffix for __float128 constants.
gdb_test "print ld=-1.375l" ".* = -1\\.375.*" "try to change ld to -1.375 with 'print ld=-1.375l'"
gdb_test "print f128=-2.375l" ".* = -2\\.375.*" "try to change f128 to -2.375 with 'print f128=-2.375l'"
# Test that gdb could handle the above correctly with "set var" command.
set test "set variable ld=10.375l"
gdb_test_multiple "set var ld=10.375l" "$test" {
-re "$gdb_prompt $" {
pass "$test"
-re "Invalid number.*$gdb_prompt $" {
fail "$test (do not recognize 10.375l)"
set test "set variable f128=20.375l"
gdb_test_multiple "set var f128=20.375l" "$test" {
-re "$gdb_prompt $" {
pass "$test"
-re "Invalid number.*$gdb_prompt $" {
fail "$test (do not recognize 20.375l)"
gdb_test "print ld" ".* = 10\\.375.*" "the value of ld is changed to 10.375"
gdb_test "print f128" ".* = 20\\.375.*" "the value of f128 is changed to 20.375"
# Test that we can correctly handle the largest IEEE-128 value
# Note: If we get "inf" instead of the correct result, we may have run into
# an internal overflow. This typically happens on host platforms without
# native IEEE-128 support where GDB was built without MPFR support.
set test "print large128"
gdb_test_multiple "print large128" "$test" {
-re ".* = 1\\.18973149535723176508575932662800702e\\+4932.*$gdb_prompt $" {
pass "$test"
-re ".* = inf.*$gdb_prompt $" {
fail "$test (GDB may be missing MPFR support!)"
-re ".*$gdb_prompt $" {
fail "$test"