rubinius/rubinius

/* -----------------------------------------------------------------------
   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