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/* -----------------------------------------------------------------------
   sysv.h - Copyright (c) 2003 Jakub Jelinek <jakub@redhat.com>
            Copyright (c) 2008 Red Hat, Inc.

   PowerPC64 Assembly glue.

   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the
   ``Software''), to deal in the Software without restriction, including
   without limitation the rights to use, copy, modify, merge, publish,
   distribute, sublicense, and/or sell copies of the Software, and to
   permit persons to whom the Software is furnished to do so, subject to
   the following conditions:

   The above copyright notice and this permission notice shall be included
   in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   DEALINGS IN THE SOFTWARE.
   ----------------------------------------------------------------------- */
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>

        .file   "linux64_closure.S"

#ifdef __powerpc64__
        FFI_HIDDEN (ffi_closure_LINUX64)
        FFI_HIDDEN (.ffi_closure_LINUX64)
        .globl  ffi_closure_LINUX64, .ffi_closure_LINUX64
        .section        ".opd","aw"
        .align  3
ffi_closure_LINUX64:
        .quad   .ffi_closure_LINUX64,.TOC.@tocbase,0
        .size   ffi_closure_LINUX64,24
        .type   .ffi_closure_LINUX64,@function
        .text
.ffi_closure_LINUX64:
.LFB1:
        # save general regs into parm save area
        std     %r3, 48(%r1)
        std     %r4, 56(%r1)
        std     %r5, 64(%r1)
        std     %r6, 72(%r1)
        mflr    %r0

        std     %r7, 80(%r1)
        std     %r8, 88(%r1)
        std     %r9, 96(%r1)
        std     %r10, 104(%r1)
        std     %r0, 16(%r1)

        # mandatory 48 bytes special reg save area + 64 bytes parm save area
        # + 16 bytes retval area + 13*8 bytes fpr save area + round to 16
        stdu    %r1, -240(%r1)
.LCFI0:

        # next save fpr 1 to fpr 13
        stfd  %f1, 128+(0*8)(%r1)
        stfd  %f2, 128+(1*8)(%r1)
        stfd  %f3, 128+(2*8)(%r1)
        stfd  %f4, 128+(3*8)(%r1)
        stfd  %f5, 128+(4*8)(%r1)
        stfd  %f6, 128+(5*8)(%r1)
        stfd  %f7, 128+(6*8)(%r1)
        stfd  %f8, 128+(7*8)(%r1)
        stfd  %f9, 128+(8*8)(%r1)
        stfd  %f10, 128+(9*8)(%r1)
        stfd  %f11, 128+(10*8)(%r1)
        stfd  %f12, 128+(11*8)(%r1)
        stfd  %f13, 128+(12*8)(%r1)

        # set up registers for the routine that actually does the work
        # get the context pointer from the trampoline
        mr %r3, %r11

        # now load up the pointer to the result storage
        addi %r4, %r1, 112

        # now load up the pointer to the parameter save area
        # in the previous frame
        addi %r5, %r1, 240 + 48

        # now load up the pointer to the saved fpr registers */
        addi %r6, %r1, 128

        # make the call
        bl .ffi_closure_helper_LINUX64
.Lret:

        # now r3 contains the return type
        # so use it to look up in a table
        # so we know how to deal with each type

        # look up the proper starting point in table
        # by using return type as offset
        mflr %r4                # move address of .Lret to r4
        sldi %r3, %r3, 4        # now multiply return type by 16
        addi %r4, %r4, .Lret_type0 - .Lret
        ld %r0, 240+16(%r1)
        add %r3, %r3, %r4       # add contents of table to table address
        mtctr %r3
        bctr                    # jump to it

# Each of the ret_typeX code fragments has to be exactly 16 bytes long
# (4 instructions). For cache effectiveness we align to a 16 byte boundary
# first.
        .align 4

.Lret_type0:
# case FFI_TYPE_VOID
        mtlr %r0
        addi %r1, %r1, 240
        blr
        nop
# case FFI_TYPE_INT
        lwa %r3, 112+4(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_FLOAT
        lfs %f1, 112+0(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_DOUBLE
        lfd %f1, 112+0(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_LONGDOUBLE
        lfd %f1, 112+0(%r1)
        mtlr %r0
        lfd %f2, 112+8(%r1)
        b .Lfinish
# case FFI_TYPE_UINT8
        lbz %r3, 112+7(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_SINT8
        lbz %r3, 112+7(%r1)
        extsb %r3,%r3
        mtlr %r0
        b .Lfinish
# case FFI_TYPE_UINT16
        lhz %r3, 112+6(%r1)
        mtlr %r0
.Lfinish:
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_SINT16
        lha %r3, 112+6(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_UINT32
        lwz %r3, 112+4(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_SINT32
        lwa %r3, 112+4(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_UINT64
        ld %r3, 112+0(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_SINT64
        ld %r3, 112+0(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# case FFI_TYPE_STRUCT
        mtlr %r0
        addi %r1, %r1, 240
        blr
        nop
# case FFI_TYPE_POINTER
        ld %r3, 112+0(%r1)
        mtlr %r0
        addi %r1, %r1, 240
        blr
# esac
.LFE1:
        .long   0
        .byte   0,12,0,1,128,0,0,0
        .size   .ffi_closure_LINUX64,.-.ffi_closure_LINUX64

        .section        .eh_frame,EH_FRAME_FLAGS,@progbits
.Lframe1:
        .4byte  .LECIE1-.LSCIE1  # Length of Common Information Entry
.LSCIE1:
        .4byte  0x0      # CIE Identifier Tag
        .byte   0x1      # CIE Version
        .ascii "zR\0"    # CIE Augmentation
        .uleb128 0x1     # CIE Code Alignment Factor
        .sleb128 -8      # CIE Data Alignment Factor
        .byte   0x41     # CIE RA Column
        .uleb128 0x1     # Augmentation size
        .byte   0x14     # FDE Encoding (pcrel udata8)
        .byte   0xc      # DW_CFA_def_cfa
        .uleb128 0x1
        .uleb128 0x0
        .align 3
.LECIE1:
.LSFDE1:
        .4byte  .LEFDE1-.LASFDE1         # FDE Length
.LASFDE1:
        .4byte  .LASFDE1-.Lframe1        # FDE CIE offset
        .8byte  .LFB1-.  # FDE initial location
        .8byte  .LFE1-.LFB1      # FDE address range
        .uleb128 0x0     # Augmentation size
        .byte   0x2      # DW_CFA_advance_loc1
        .byte   .LCFI0-.LFB1
        .byte   0xe      # DW_CFA_def_cfa_offset
        .uleb128 240
        .byte   0x11     # DW_CFA_offset_extended_sf
        .uleb128 0x41
        .sleb128 -2
        .align 3
.LEFDE1:
#endif

#if defined __ELF__ && defined __linux__
        .section        .note.GNU-stack,"",@progbits
#endif