# Copyright 2009-2020 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
# 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# This file is part of the gdb testsuite.


if ![istarget "i?86-*linux*"] then {
    verbose "Skipping i387 reverse float tests."
    return
}

standard_testfile

# some targets have leading underscores on assembly symbols.
set additional_flags [gdb_target_symbol_prefix_flags]

if {[prepare_for_testing "failed to prepare" $testfile $srcfile \
	 [list debug $additional_flags]]} {
    return -1
}

runto_main

# Record to end of main

set location [gdb_get_line_number "END I387-FLOAT-REVERSE"]
gdb_test_no_output "record"  "Turn on process record"
# This can take awhile.
set oldtimeout $timeout
set timeout [expr $oldtimeout + 120]
gdb_test "until $location" ".*$srcfile:$location.*" \
    "record to end of main"
set timeout $oldtimeout

# Now rewind to beginning so we can begin testing.

set location [gdb_get_line_number "BEGIN I387-FLOAT-REVERSE"]
gdb_test_no_output "set exec-dir reverse" "set reverse direction"
gdb_test "until $location" ".*$srcfile:$location.*" \
    "rewind to beginning of main"
gdb_test_no_output "set exec-dir forward" "set forward direction"

# Test FPU env particularly ftag and fstatus reigters.

set location [gdb_get_line_number "TEST ENV"]
gdb_test "until $location" ".*$srcfile:$location.*asm.*nop.*" \
    "begin testing fpu env"       

gdb_test "n" "asm.*fsave.*"               "save FPU env in memory"    
gdb_test "n" "asm.*frstor.*"              "restore FPU env"
gdb_test "n" "asm.*fstsw.*"               "store status word in EAX"
gdb_test "n" "asm.*fld1.*"                "push st0"

gdb_test "info register eax" "eax *0x8040000.*\[ \t\]+.*"  "verify eax == 0x8040000"
gdb_test "info register fstat" "fstat *0.*\[ \t\]+.*"      "verify fstat == 0"
gdb_test "info register ftag" "ftag *0xffff.*\[ \t\]+.*"   "verify ftag == 0xffff"

gdb_test "stepi" "asm.*fldl2t.*"                      "push st0"
gdb_test "info register fstat" "fstat *0x3800.*\[ \t\]+.*"  "verify fstat == 0x3800"
gdb_test "info register ftag" "ftag *0x3fff.*\[ \t\]+.*"    "verify ftag  == 0x3fff"

gdb_test "stepi" "asm.*fldl2e.*"                  "push st0"
gdb_test "info register fstat" "fstat *0x3000.*\[ \t\]+.*"  "verify fstat == 0x3000"
gdb_test "info register ftag" "ftag *0xfff.*\[ \t\]+.*"     "verify ftag  == 0xfff"

gdb_test "stepi" "asm.*fldpi.*"                   "push st0"
gdb_test "info register fstat" "fstat *0x2800.*\[ \t\]+.*"  "verify fstat == 0x2800"
gdb_test "info register ftag" "ftag *0x3ff.*\[ \t\]+.*"     "verify ftag  == 0x3ff"

gdb_test "stepi" "asm.*fldlg2.*"                  "push st0"
gdb_test "info register fstat" "fstat *0x2000.*\[ \t\]+.*"  "verify fstat == 0x2000"
gdb_test "info register ftag" "ftag *0xff.*\[ \t\]+.*"      "verify ftag  == 0xff"

gdb_test "stepi" "asm.*fldln2.*"                  "push st0"
gdb_test "info register fstat" "fstat *0x1800.*\[ \t\]+.*"  "verify fstat == 0x1800"
gdb_test "info register ftag" "ftag *0x3f.*\[ \t\]+.*"      "verify ftag  == 0x3f"

gdb_test "stepi" "asm.*fldz.*"                    "push st0"
gdb_test "info register fstat" "fstat *0x1000.*\[ \t\]+.*"  "verify fstat == 0x1000"
gdb_test "info register ftag" "ftag *0xf.*\[ \t\]+.*"       "verify ftag  == 0xf"

gdb_test "stepi" "asm.*nop.*"                    "push st0"
gdb_test "info register fstat" "fstat *0x800.*\[ \t\]+.*"  "verify fstat == 0x800"
gdb_test "info register ftag" "ftag *0x7.*\[ \t\]+.*"      "verify ftag  == 0x7"


# move backward and ehck we get the same registers back.

gdb_test "reverse-stepi" "asm.*fldz.*"           "push st0"
gdb_test "info register fstat" "fstat *0x1000.*\[ \t\]+.*" "verify fstat == 0x1000"
gdb_test "info register ftag" "ftag *0xf.*\[ \t\]+.*"      "verify ftag  == 0xf"

gdb_test "reverse-stepi" "asm.*fldln2.*"          "push st0"
gdb_test "info register fstat" "fstat *0x1800.*\[ \t\]+.*"  "verify fstat == 0x1800"
gdb_test "info register ftag" "ftag *0x3f.*\[ \t\]+.*"      "verify ftag  == 0x3f"

gdb_test "reverse-stepi" "asm.*fldlg2.*"          "push st0"
gdb_test "info register fstat" "fstat *0x2000.*\[ \t\]+.*"  "verify fstat == 0x2000"
gdb_test "info register ftag" "ftag *0xff.*\[ \t\]+.*"      "verify ftag  == 0xff"

gdb_test "reverse-stepi" "asm.*fldpi.*"          "push st0"
gdb_test "info register fstat" "fstat *0x2800.*\[ \t\]+.*" "verify fstat == 0x2800"
gdb_test "info register ftag" "ftag *0x3ff.*\[ \t\]+.*"    "verify ftag  == 0x3ff"

gdb_test "reverse-stepi" "asm.*fldl2e.*"          "push st0"
gdb_test "info register fstat" "fstat *0x3000.*\[ \t\]+.*"  "verify fstat == 0x3000"
gdb_test "info register ftag" "ftag *0xfff.*\[ \t\]+.*"     "verify ftag  == 0xfff"

gdb_test "reverse-stepi" "asm.*fldl2t.*"          "push st0"
gdb_test "info register fstat" "fstat *0x3800.*\[ \t\]+.*"  "verify fstat == 0x3800"
gdb_test "info register ftag" "ftag *0x3fff.*\[ \t\]+.*"    "verify ftag  == 0x3fff"

gdb_test "reverse-stepi" "asm.*fld1.*"            "push st0"
gdb_test "info register fstat" "fstat *0.*\[ \t\]+.*"       "verify fstat == 0"
gdb_test "info register ftag" "ftag *0xffff.*\[ \t\]+.*"    "verify ftag == 0xffff"