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/* -----------------------------------------------------------------------
        
   sysv.S - Copyright (c) 1998, 2012 Andreas Schwab
            Copyright (c) 2008 Red Hat, Inc. 
   
   m68k Foreign Function Interface 

   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>

#ifdef HAVE_AS_CFI_PSEUDO_OP
#define CFI_STARTPROC()         .cfi_startproc
#define CFI_OFFSET(reg,off)     .cfi_offset     reg,off
#define CFI_DEF_CFA(reg,off)    .cfi_def_cfa    reg,off
#define CFI_ENDPROC()           .cfi_endproc
#else
#define CFI_STARTPROC()
#define CFI_OFFSET(reg,off)
#define CFI_DEF_CFA(reg,off)
#define CFI_ENDPROC()
#endif

        .text

        .globl  ffi_call_SYSV
        .type   ffi_call_SYSV,@function
        .align  4

ffi_call_SYSV:
        CFI_STARTPROC()
        link    %fp,#0
        CFI_OFFSET(14,-8)
        CFI_DEF_CFA(14,8)
        move.l  %d2,-(%sp)
        CFI_OFFSET(2,-12)

        | Make room for all of the new args.
        sub.l   12(%fp),%sp

        | Call ffi_prep_args
        move.l  8(%fp),-(%sp)
        pea     4(%sp)
#if !defined __PIC__
        jsr     ffi_prep_args
#else
        bsr.l   ffi_prep_args@PLTPC
#endif
        addq.l  #8,%sp  

        | Pass pointer to struct value, if any
        move.l  %a0,%a1

        | Call the function
        move.l  24(%fp),%a0
        jsr     (%a0)

        | Remove the space we pushed for the args
        add.l   12(%fp),%sp

        | Load the pointer to storage for the return value
        move.l  20(%fp),%a1

        | Load the return type code 
        move.l  16(%fp),%d2

        | If the return value pointer is NULL, assume no return value.
        | NOTE: On the mc68000, tst on an address register is not supported.
#if !defined(__mc68020__) && !defined(__mc68030__) && !defined(__mc68040__) && !defined(__mc68060__) && !defined(__mcoldfire__)
        cmp.w   #0, %a1
#else
        tst.l   %a1
#endif
        jbeq    noretval

        btst    #0,%d2
        jbeq    retlongint
        move.l  %d0,(%a1)
        jbra    epilogue

retlongint:
        btst    #1,%d2
        jbeq    retfloat
        move.l  %d0,(%a1)
        move.l  %d1,4(%a1)
        jbra    epilogue

retfloat:
        btst    #2,%d2
        jbeq    retdouble
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.s %fp0,(%a1)
#else
        move.l  %d0,(%a1)
#endif
        jbra    epilogue

retdouble:
        btst    #3,%d2
        jbeq    retlongdouble
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.d %fp0,(%a1)
#else
        move.l  %d0,(%a1)+
        move.l  %d1,(%a1)
#endif
        jbra    epilogue

retlongdouble:
        btst    #4,%d2
        jbeq    retpointer
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.x %fp0,(%a1)
#else
        move.l  %d0,(%a1)+
        move.l  %d1,(%a1)+
        move.l  %d2,(%a1)
#endif
        jbra    epilogue

retpointer:
        btst    #5,%d2
        jbeq    retstruct1
        move.l  %a0,(%a1)
        jbra    epilogue

retstruct1:
        btst    #6,%d2
        jbeq    retstruct2
        move.b  %d0,(%a1)
        jbra    epilogue

retstruct2:
        btst    #7,%d2
        jbeq    noretval
        move.w  %d0,(%a1)

noretval:
epilogue:
        move.l  (%sp)+,%d2
        unlk    %fp
        rts
        CFI_ENDPROC()
        .size   ffi_call_SYSV,.-ffi_call_SYSV

        .globl  ffi_closure_SYSV
        .type   ffi_closure_SYSV, @function
        .align  4

ffi_closure_SYSV:
        CFI_STARTPROC()
        link    %fp,#-12
        CFI_OFFSET(14,-8)
        CFI_DEF_CFA(14,8)
        move.l  %sp,-12(%fp)
        pea     8(%fp)
        pea     -12(%fp)
        move.l  %a0,-(%sp)
#if !defined __PIC__
        jsr     ffi_closure_SYSV_inner
#else
        bsr.l   ffi_closure_SYSV_inner@PLTPC
#endif

        lsr.l   #1,%d0
        jne     1f
        jcc     .Lcls_epilogue
        move.l  -12(%fp),%d0
.Lcls_epilogue:
        unlk    %fp
        rts
1:
        lea     -12(%fp),%a0
        lsr.l   #2,%d0
        jne     1f
        jcs     .Lcls_ret_float
        move.l  (%a0)+,%d0
        move.l  (%a0),%d1
        jra     .Lcls_epilogue
.Lcls_ret_float:
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.s (%a0),%fp0
#else
        move.l  (%a0),%d0
#endif
        jra     .Lcls_epilogue
1:
        lsr.l   #2,%d0
        jne     1f
        jcs     .Lcls_ret_ldouble
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.d (%a0),%fp0
#else
        move.l  (%a0)+,%d0
        move.l  (%a0),%d1
#endif
        jra     .Lcls_epilogue
.Lcls_ret_ldouble:
#if defined(__MC68881__) || defined(__HAVE_68881__)
        fmove.x (%a0),%fp0
#else
        move.l  (%a0)+,%d0
        move.l  (%a0)+,%d1
        move.l  (%a0),%d2
#endif
        jra     .Lcls_epilogue
1:
        lsr.l   #2,%d0
        jne     .Lcls_ret_struct2
        jcs     .Lcls_ret_struct1
        move.l  (%a0),%a0
        move.l  %a0,%d0
        jra     .Lcls_epilogue
.Lcls_ret_struct1:
        move.b  (%a0),%d0
        jra     .Lcls_epilogue
.Lcls_ret_struct2:
        move.w  (%a0),%d0
        jra     .Lcls_epilogue
        CFI_ENDPROC()

        .size   ffi_closure_SYSV,.-ffi_closure_SYSV

        .globl  ffi_closure_struct_SYSV
        .type   ffi_closure_struct_SYSV, @function
        .align  4

ffi_closure_struct_SYSV:
        CFI_STARTPROC()
        link    %fp,#0
        CFI_OFFSET(14,-8)
        CFI_DEF_CFA(14,8)
        move.l  %sp,-12(%fp)
        pea     8(%fp)
        move.l  %a1,-(%sp)
        move.l  %a0,-(%sp)
#if !defined __PIC__
        jsr     ffi_closure_SYSV_inner
#else
        bsr.l   ffi_closure_SYSV_inner@PLTPC
#endif
        unlk    %fp
        rts
        CFI_ENDPROC()
        .size   ffi_closure_struct_SYSV,.-ffi_closure_struct_SYSV

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