# Copyright 2009, 2010, 2011 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 $tracelevel {
    strace $tracelevel
}


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

set testfile "i387-stack-reverse"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}

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

if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug $additional_flags]] != "" } {
    untested ${testfile}.exp
    return -1
}

# Get things started.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
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"
gdb_test "until $location" ".*/$srcfile:$location.*" \
    "record to end of main"

# 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 stack. FPU stack includes st0, st1, st2, st3, st4, 
# st5, st6, st7. We push 8 values to FPU stack in record mode
# and see whether all are getting recorded.

set location [gdb_get_line_number "test st0 register"]
gdb_test "until $location" ".*/$srcfile:$location.*asm.*fld1.*" \
    "begin test st0"
gdb_test "stepi" "asm.*fldl2t.*"              "push st0 == 1"
gdb_test "info register st0" "st0 *1\t.*"     "verify st0 == 1"


gdb_test "stepi" "asm.*fldl2e.*"              "push st0 == 3.3219280948*"
gdb_test "info register st0" "st0 *3.32192.*\t.*" "verify st0 == 3.321928094*"
gdb_test "info register st1" "st1 *1\t.*"       "verify st1 == 1"

gdb_test "stepi" "asm.*fldpi.*"                   "push st0 == 1.4426950406*"
gdb_test "info register st0" "st0 *1.44269.*\t.*" "verify st0 == 1.442695040*"
gdb_test "info register st1" "st1 *3.32192.*\t.*" "verify st1 == 3.3219280948*"
gdb_test "info register st2" "st2 *1\t.*"         "verify st2 == 1"
                                               
gdb_test "stepi" "asm.*fldlg2.*"                  "push st0 == 3.14159265*"
gdb_test "info register st0" "st0 *3.14159.*\t.*" "verify st0 == 3.14159265*"
gdb_test "info register st1" "st1 *1.44269.*\t.*" "verify st1 == 1.4426950*"
gdb_test "info register st2" "st2 *3.32192.*\t.*" "verify st2 == 3.3219280*"
gdb_test "info register st3" "st3 *1\t.*"          "verify st3 == 1"

gdb_test "stepi" "asm.*fldln2.*"                  "push st0 == 0.301029*"
gdb_test "info register st0" "st0 *0.30102.*\t.*" "verify st0 == 0.301029*"
gdb_test "info register st1" "st1 *3.14159.*\t.*" "verify st1 == 3.14159265*"
gdb_test "info register st2" "st2 *1.44269.*\t.*" "verify st2 == 1.44269506*"
gdb_test "info register st3" "st3 *3.32192.*\t.*" "verify st3 == 3.3219280948*"
gdb_test "info register st4" "st4 *1\t.*"         "verify st4 == 1"

gdb_test "stepi" "asm.*fldz.*"                    "push st0 == 0.69314*"
gdb_test "info register st0" "st0 *0.69314.*\t.*" "verify st0 == 0.69314*"
gdb_test "info register st1" "st1 *0.30102.*\t.*" "verify st1 == 0.301029*"
gdb_test "info register st2" "st2 *3.14159.*\t.*" "verify st2 == 3.14159265*"
gdb_test "info register st3" "st3 *1.44269.*\t.*" "verify st3 == 1.442695040*"
gdb_test "info register st4" "st4 *3.32192.*\t.*" "verify st4 == 3.3219280948*"
gdb_test "info register st5" "st5 *1\t.*"         "verify st5 == 1"

gdb_test "stepi" "asm.*fld1.*"                    "push st0 == 0"
gdb_test "info register st0" "st0 *0\t.*"         "verify st0 == 0"
gdb_test "info register st1" "st1 *0.69314.*\t.*" "verify st1 == 0.69314*"
gdb_test "info register st2" "st2 *0.30102.*\t.*" "verify st2 == 0.301029*"
gdb_test "info register st3" "st3 *3.14159.*\t.*" "verify st3 == 3.14159265*"
gdb_test "info register st4" "st4 *1.44269.*\t.*" "verify st4 == 1.442695040*"
gdb_test "info register st5" "st5 *3.32192.*\t.*" "verify st5 == 3.32192809*"
gdb_test "info register st6" "st6 *1\t.*"         "verify st6 == 1"

gdb_test "stepi" "asm.*nop.*"                     "push st0 == 0"
gdb_test "info register st0" "st0 *1\t.*"         "verify st0 == 1"
gdb_test "info register st1" "st1 *0\t.*"         "verify st1 == 0"
gdb_test "info register st2" "st2 *0.69314.*\t.*" "verify st2 == 0.69314*"
gdb_test "info register st3" "st3 *0.30102.*\t.*" "verify st3 == 0.301029*"
gdb_test "info register st4" "st4 *3.14159.*\t.*" "verify st4 == 3.14159265*"
gdb_test "info register st5" "st5 *1.44269.*\t.*" "verify st5 == 1.44269504*"
gdb_test "info register st6" "st6 *3.32192.*\t.*" "verify st6 == 3.3219280948*"
gdb_test "info register st7" "st7 *1.*"           "verify st7 == 1"

# Now step backward, and check that st0 value reverts to zero.

gdb_test "reverse-stepi" "asm.*fld1.*"            "undo registers, st0-st7"
gdb_test "info register st0" "st0 *0\t.*"         "verify st0 == 0"
gdb_test "info register st1" "st1 *0.69314.*\t.*" "verify st1 == 0.69314*"
gdb_test "info register st2" "st2 *0.30102.*\t.*" "verify st2 == 0.301029*"
gdb_test "info register st3" "st3 *3.14159.*\t.*" "verify st3 == 3.14159265*"
gdb_test "info register st4" "st4 *1.44269.*\t.*" "verify st4 == 1.442695040*"
gdb_test "info register st5" "st5 *3.32192.*\t.*" "verify st5 == 3.3219280948*"
gdb_test "info register st6" "st6 *1\t.*"         "verify st6 == 1"

gdb_test "reverse-stepi" "asm.*fldz.*"            "push st0 == 0.69314*"
gdb_test "info register st0" "st0 *0.69314.*\t.*" "verify st0 == 0.69314*"
gdb_test "info register st1" "st1 *0.30102.*\t.*" "verify st1 == 0.301029*"
gdb_test "info register st2" "st2 *3.14159.*\t.*" "verify st2 == 3.14159265*"
gdb_test "info register st3" "st3 *1.44269.*\t.*" "verify st3 == 1.442695040*"
gdb_test "info register st4" "st4 *3.32192.*\t.*" "verify st4 == 3.3219280948*"
gdb_test "info register st5" "st5 *1\t.*"       "verify st5 == 1"

gdb_test "reverse-stepi" "asm.*fldln2.*"          "push st0 == 0.301029*"
gdb_test "info register st0" "st0 *0.30102.*\t.*" "verify st0 == 0.301029*"
gdb_test "info register st1" "st1 *3.14159.*\t.*" "verify st1 == 3.14159265*"
gdb_test "info register st2" "st2 *1.44269.*\t.*" "verify st2 == 1.442695040*"
gdb_test "info register st3" "st3 *3.32192.*\t.*" "verify st3 == 3.3219280948*"
gdb_test "info register st4" "st4 *1\t.*"         "verify st4 == 1"

gdb_test "reverse-stepi" "asm.*fldlg2.*"          "push st0 == 3.14159265*"
gdb_test "info register st0" "st0 *3.14159.*\t.*" "verify st0 == 3.14159265*"
gdb_test "info register st1" "st1 *1.44269.*\t.*" "verify st1 == 1.442695040*"
gdb_test "info register st2" "st2 *3.32192.*\t.*" "verify st2 == 3.3219280948*"
gdb_test "info register st3" "st3 *1\t.*"       "verify st3 == 1"

gdb_test "reverse-stepi" "asm.*fldpi.*"           "push st0 == 1.44269504088*"
gdb_test "info register st0" "st0 *1.44269.*\t.*" "verify st0 == 1.442695040*"
gdb_test "info register st1" "st1 *3.32192.*\t.*" "verify st1 == 3.3219280948*"
gdb_test "info register st2" "st2 *1\t.*"         "verify st2 == 1"


gdb_test "reverse-stepi" "asm.*fldl2e.*"          "push st0 == 3.3219280948*"
gdb_test "info register st0" "st0 *3.32192.*\t.*" "verify st0 == 3.3219280948*"
gdb_test "info register st1" "st1 *1\t.*"         "verify st1 == 1"

gdb_test "reverse-stepi" "asm.*fldl2t.*"      "push st0 == 1"
gdb_test "info register st0" "st0 *1\t.*"     "verify st0 == 1"