1# Copyright 2016-2023 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 ${binfile} 34 35if {![runto_main]} { 36 return 37} 38 39# Run to the breakpoint at return. 40gdb_breakpoint [gdb_get_line_number "return"] 41gdb_continue_to_breakpoint "return" 42 43# Print the original value of ld and f128 44gdb_test "print ld" ".* = 1\\.375.*" "the original value of ld is 1.375" 45gdb_test "print f128" ".* = 2\\.375.*" "the original value of f128 is 2.375" 46 47# Test that gdb could correctly recognize float constant expression with a suffix. 48# FIXME: gdb does not yet recognize the GNU extension 'q' suffix for __float128 constants. 49gdb_test "print ld=-1.375l" ".* = -1\\.375.*" "try to change ld to -1.375 with 'print ld=-1.375l'" 50gdb_test "print f128=-2.375l" ".* = -2\\.375.*" "try to change f128 to -2.375 with 'print f128=-2.375l'" 51 52# Test that gdb could handle the above correctly with "set var" command. 53set test "set variable ld=10.375l" 54gdb_test_multiple "set var ld=10.375l" "$test" { 55 -re "$gdb_prompt $" { 56 pass "$test" 57 } 58 -re "Invalid number.*$gdb_prompt $" { 59 fail "$test (do not recognize 10.375l)" 60 } 61} 62 63set test "set variable f128=20.375l" 64gdb_test_multiple "set var f128=20.375l" "$test" { 65 -re "$gdb_prompt $" { 66 pass "$test" 67 } 68 -re "Invalid number.*$gdb_prompt $" { 69 fail "$test (do not recognize 20.375l)" 70 } 71} 72 73gdb_test "print ld" ".* = 10\\.375.*" "the value of ld is changed to 10.375" 74gdb_test "print f128" ".* = 20\\.375.*" "the value of f128 is changed to 20.375" 75 76set mpfr_supported -1 77gdb_test_multiple "show configuration" "" { 78 -wrap -re "--with-mpfr\r\n.*" { 79 set mpfr_supported 1 80 } 81 -wrap -re "--without-mpfr\r\n.*" { 82 set mpfr_supported 0 83 } 84} 85 86# Test that we can correctly handle the largest IEEE-128 value 87# Note: If we get "inf" instead of the correct result, we may have run into 88# an internal overflow. This typically happens on host platforms without 89# native IEEE-128 support where GDB was built without MPFR support. 90set test "print large128" 91gdb_test_multiple "print large128" "$test" { 92 -re ".* = 1\\.18973149535723176508575932662800702e\\+4932.*$gdb_prompt $" { 93 pass "$test" 94 } 95 -re ".* = inf.*$gdb_prompt $" { 96 if { $mpfr_supported == 0 } { 97 # If the host platform has native 128-bit float support (as is 98 # the case for some versions of s390 and powerpc), the 99 # "print large128" test should be passing, even without MPFR 100 # support. So, in those cases we should have fail here rather than 101 # unsupported. However, given that we don't have a way to readily 102 # test for this, we fall back to unsupported. 103 unsupported "$test (Missing MPFR support)" 104 } else { 105 fail $test 106 } 107 } 108 -re ".*$gdb_prompt $" { 109 fail "$test" 110 } 111} 112 113