1# Copyright 2016-2020 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 3 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, see <http://www.gnu.org/licenses/>. 15 16# This file is part of the gdb testsuite. It is intended to test that 17# gdb could correctly handle floating point constant with a suffix. 18 19standard_testfile .c 20 21proc do_compile { {opts {}} } { 22 global srcdir subdir srcfile binfile 23 set ccopts {debug quiet} 24 foreach opt $opts {lappend ccopts "additional_flags=$opt"} 25 gdb_compile "${srcdir}/${subdir}/${srcfile}" "$binfile" executable $ccopts 26} 27 28if { [do_compile] != "" && [do_compile {-mfloat128}] != "" } { 29 untested "compiler can't handle __float128 type?" 30 return -1 31} 32 33clean_restart ${binfile} 34 35if ![runto_main] then { 36 perror "couldn't run to breakpoint" 37 continue 38} 39 40# Run to the breakpoint at return. 41gdb_breakpoint [gdb_get_line_number "return"] 42gdb_continue_to_breakpoint "return" 43 44# Print the original value of ld and f128 45gdb_test "print ld" ".* = 1\\.375.*" "the original value of ld is 1.375" 46gdb_test "print f128" ".* = 2\\.375.*" "the original value of f128 is 2.375" 47 48# Test that gdb could correctly recognize float constant expression with a suffix. 49# FIXME: gdb does not yet recognize the GNU extension 'q' suffix for __float128 constants. 50gdb_test "print ld=-1.375l" ".* = -1\\.375.*" "try to change ld to -1.375 with 'print ld=-1.375l'" 51gdb_test "print f128=-2.375l" ".* = -2\\.375.*" "try to change f128 to -2.375 with 'print f128=-2.375l'" 52 53# Test that gdb could handle the above correctly with "set var" command. 54set test "set variable ld=10.375l" 55gdb_test_multiple "set var ld=10.375l" "$test" { 56 -re "$gdb_prompt $" { 57 pass "$test" 58 } 59 -re "Invalid number.*$gdb_prompt $" { 60 fail "$test (do not recognize 10.375l)" 61 } 62} 63 64set test "set variable f128=20.375l" 65gdb_test_multiple "set var f128=20.375l" "$test" { 66 -re "$gdb_prompt $" { 67 pass "$test" 68 } 69 -re "Invalid number.*$gdb_prompt $" { 70 fail "$test (do not recognize 20.375l)" 71 } 72} 73 74gdb_test "print ld" ".* = 10\\.375.*" "the value of ld is changed to 10.375" 75gdb_test "print f128" ".* = 20\\.375.*" "the value of f128 is changed to 20.375" 76 77# Test that we can correctly handle the largest IEEE-128 value 78# Note: If we get "inf" instead of the correct result, we may have run into 79# an internal overflow. This typically happens on host platforms without 80# native IEEE-128 support where GDB was built without MPFR support. 81set test "print large128" 82gdb_test_multiple "print large128" "$test" { 83 -re ".* = 1\\.18973149535723176508575932662800702e\\+4932.*$gdb_prompt $" { 84 pass "$test" 85 } 86 -re ".* = inf.*$gdb_prompt $" { 87 fail "$test (GDB may be missing MPFR support!)" 88 } 89 -re ".*$gdb_prompt $" { 90 fail "$test" 91 } 92} 93 94