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/* -----------------------------------------------------------------------
   eabi.S - Copyright (c) 2004  Anthony Green
   
   FR-V 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 AUTHOR 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>

        .globl ffi_prep_args_EABI

        .text
        .p2align 4
        .globl ffi_call_EABI
        .type ffi_call_EABI, @function

        # gr8 :   ffi_prep_args
        # gr9 :   &ecif
        # gr10:   cif->bytes
        # gr11:   fig->flags
        # gr12:   ecif.rvalue
        # gr13:   fn
        
ffi_call_EABI:  
        addi    sp, #-80, sp
        sti     fp, @(sp, #24)
        addi    sp, #24, fp
        movsg   lr, gr5

        /* Make room for the new arguments.  */
        /* subi sp, fp, gr10 */
        
        /* Store return address and incoming args on stack.  */
        sti     gr5, @(fp, #8)
        sti     gr8, @(fp, #-4)
        sti     gr9, @(fp, #-8)
        sti     gr10, @(fp, #-12)
        sti     gr11, @(fp, #-16)
        sti     gr12, @(fp, #-20)
        sti     gr13, @(fp, #-24)

        sub     sp, gr10, sp
        
        /* Call ffi_prep_args.  */
        ldi     @(fp, #-4), gr4
        addi    sp, #0, gr8
        ldi     @(fp, #-8), gr9
#ifdef __FRV_FDPIC__
        ldd     @(gr4, gr0), gr14
        calll   @(gr14, gr0)
#else
        calll   @(gr4, gr0)
#endif  

        /* ffi_prep_args returns the new stack pointer.  */
        mov     gr8, gr4
                
        ldi     @(sp, #0), gr8
        ldi     @(sp, #4), gr9
        ldi     @(sp, #8), gr10
        ldi     @(sp, #12), gr11
        ldi     @(sp, #16), gr12
        ldi     @(sp, #20), gr13

        /* Always copy the return value pointer into the hidden
           parameter register.  This is only strictly necessary
           when we're returning an aggregate type, but it doesn't
           hurt to do this all the time, and it saves a branch.  */
        ldi     @(fp, #-20), gr3

        /* Use the ffi_prep_args return value for the new sp.  */
        mov     gr4, sp
        
        /* Call the target function.  */
        ldi     @(fp, -24), gr4
#ifdef __FRV_FDPIC__
        ldd     @(gr4, gr0), gr14
        calll   @(gr14, gr0)
#else
        calll   @(gr4, gr0)
#endif  

        /* Store the result. */
        ldi     @(fp, #-16), gr10  /* fig->flags */
        ldi     @(fp, #-20), gr4   /* ecif.rvalue */

        /* Is the return value stored in two registers?  */
        cmpi    gr10, #8, icc0
        bne     icc0, 0, .L2
        /*   Yes, save them.  */
        sti     gr8, @(gr4, #0)
        sti     gr9, @(gr4, #4)
        bra     .L3
.L2:
        /* Is the return value a structure?  */
        cmpi    gr10, #-1, icc0
        beq     icc0, 0, .L3
        /*   No, save a 4 byte return value.  */
        sti     gr8, @(gr4, #0)
.L3:    

        /* Restore the stack, and return.  */
        ldi     @(fp, 8), gr5
        ld      @(fp, gr0), fp
        addi    sp,#80,sp
        jmpl    @(gr5,gr0)
        .size ffi_call_EABI, .-ffi_call_EABI