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# Copyright 2003, 2004, 2007, 2008 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/>.
#
# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu
#

# Tests for Powerpc E500 register setting and fetching

if $tracelevel then {
    strace $tracelevel
}

#
# Test the use of registers, especially E500 registers, for Powerpc.
# This file uses e500-regs.c for input.
#

set prms_id 0
set bug_id 0

if ![istarget "powerpc-*eabispe"] then {
    verbose "Skipping e500 register tests."
    return
}

set testfile "e500-regs"
set binfile ${objdir}/${subdir}/${testfile}
set src1 ${srcdir}/${subdir}/${testfile}.c

if  { [gdb_compile ${src1} ${binfile} executable {debug nowarnings}] != "" } {
     untested e500-regs.exp
     return -1
}

gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

#
# Run to `main' where we begin our tests.
#

if ![runto_main] then {
    gdb_suppress_tests
}

# set all the registers integer portions to 1
for {set i 0} {$i < 32} {incr i 1} {
        for {set j 0} {$j < 2} {incr j 1} {
           gdb_test "set \$ev$i.v2_int32\[$j\] = 1" "" "set reg ev$i.v4si.f\[$j\]"
        }
}

# Now execute some target code, so that GDB's register cache is flushed.

#gdb_test "next" "" ""

send_gdb "show endian\n"
gdb_expect {
    -re "(The target endianness is set automatically .currently )(big|little)( endian.*)$gdb_prompt $" {
        pass "endianness"
        set endianness $expect_out(2,string)
    }
    -re ".*$gdb_prompt $" {
        fail "couldn't get endianness"
    }
    timeout             { fail "(timeout) endianness" }
}

# And then read the E500 registers back, to see that
# a) the register write above worked, and
# b) the register read (below) also works.

if {$endianness == "big"} {
set vector_register ".uint64 = 0x100000001, v2_float = .0x0, 0x0., v2_int32 = .0x1, 0x1., v4_int16 = .0x0, 0x1, 0x0, 0x1., v8_int8 = .0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x1.."
} else {
set vector_register ".uint64 = 0x100000001, v2_float = .0x0, 0x0., v2_int32 = .0x1, 0x1., v4_int16 = .0x1, 0x0, 0x1, 0x0., v8_int8 = .0x1, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0.."
}

for {set i 0} {$i < 32} {incr i 1} {
        gdb_test "info reg ev$i" "ev$i.*$vector_register" "info reg ev$i"
}

# Test wether the GPRs are updated accordingly. (GPRs are just the lower
# 32 bits of the EV registers.)

set general_register "0x1\[ \t\]+1"

for {set i 0} {$i < 32} {incr i 1} {
        gdb_test "info reg r$i" "r$i.*$general_register" "info reg r$i"
}

# Now redo the same tests, but using the print command.
# Note: in LE case, the char array is printed WITHOUT the last character.
# Gdb treats the terminating null char in the array like the terminating
# null char in a string and doesn't print it. This is not a failure, but
# the way gdb works.

if {$endianness == "big"} {
     set decimal_vector ".uint64 = 4294967297, v2_float = .1.*e-45, 1.*e-45., v2_int32 = .1, 1., v4_int16 = .0, 1, 0, 1., v8_int8 = ..000.000.000.001.000.000.000.001.."
} else {
     set decimal_vector ".uint64 = 4294967297, v2_float = .1.*e-45, 1.*e-45., v2_int32 = .1, 1., v4_int16 = .1, 0, 1, 0., v8_int8 = ..001.000.000.000.001.000.000.."
}

for {set i 0} {$i < 32} {incr i 1} {
        gdb_test "print \$ev$i" ".* = $decimal_vector" "print ev$i"
}

for {set i 0} {$i < 32} {incr i 1} {
         set pattern$i ".*ev$i.*"
         append pattern$i $vector_register
}

send_gdb "info vector\n"
gdb_expect_list "info vector" ".*$gdb_prompt $" {
[$pattern0]
[$pattern1]
[$pattern2]
[$pattern3]
[$pattern4]
[$pattern5]
[$pattern6]
[$pattern7]
[$pattern8]
[$pattern9]
[$pattern10]
[$pattern11]
[$pattern12]
[$pattern13]
[$pattern14]
[$pattern15]
[$pattern16]
[$pattern17]
[$pattern18]
[$pattern19]
[$pattern20]
[$pattern21]
[$pattern22]
[$pattern23]
[$pattern24]
[$pattern25]
[$pattern26]
[$pattern27]
[$pattern28]
[$pattern29]
[$pattern30]
[$pattern31]
}

# We must restart everything, because we have set important registers to
# some unusual values.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
if ![runto_main] then {
    gdb_suppress_tests
}

gdb_test "break vector_fun" \
 "Breakpoint 2 at.*e500-regs.c, line \[0-9\]+\\." \
 "Set breakpoint at vector_fun"

# Actually it is nuch easier to see these results printed in hex.
# gdb_test "set output-radix 16" \
#   "Output radix now set to decimal 16, hex 10, octal 20." \
#   "Set output radix to hex"

gdb_test "continue" \
  "Breakpoint 2, vector_fun .a=.-2, -2., b=.1, 1.*e500-regs.c.*ev_create_s32 .2, 2.;" \
  "continue to vector_fun"

# Do a next over the assignment to vector 'a'. 
gdb_test "next" ".*b = \\(vector int\\) __ev_create_s32 \\(3, 3\\);" \
  "next (1)"

# Do a next over the assignment to vector 'b'. 
gdb_test "next" "c = __ev_and \\(a, b\\);" \
  "next (2)"

# Now 'a' should be '0x02020202...' and 'b' should be '0x03030303...'
gdb_test "print/x a" \
  ".*= .0x2, 0x2." \
  "print vector parameter a"

gdb_test "print/x b" \
  ".*= .0x3, 0x3." \
  "print vector parameter b"

# If we do an 'up' now, and print 'x' and 'y' we should see the values they
# have in main, not the values they have in vector_fun.
gdb_test "up" ".1.*main \\(\\) at.*e500-regs.c.*z = vector_fun \\(x, y\\);" \
  "up to main"

gdb_test "print x" \
  ".*= .-2, -2." \
  "print vector x"

gdb_test "print y" \
  ".*= .1, 1." \
  "print vector y"

# now go back to vector_func and do a finish, to see if we can print the return
# value correctly.

gdb_test "down" \
  ".0  vector_fun \\(a=.2, 2., b=.3, 3.\\) at.*e500-regs.c.*c = __ev_and \\(a, b\\);" \
  "down to vector_fun"

gdb_test "finish" \
  "Run till exit from .0  vector_fun \\(a=.2, 2., b=.3, 3.\\) at.*e500-regs.c.*main \\(\\) at.*e500-regs.c.*z = vector_fun \\(x, y\\);.*Value returned is.*= .2, 2." \
  "finish returned correct value"