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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libffi/] [src/] [m32r/] [sysv.S] - Blame information for rev 732

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1 732 jeremybenn
/* -----------------------------------------------------------------------
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   sysv.S - Copyright (c) 2004 Renesas Technology
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   M32R Foreign Function Interface
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   Permission is hereby granted, free of charge, to any person obtaining
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   a copy of this software and associated documentation files (the
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   ``Software''), to deal in the Software without restriction, including
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   without limitation the rights to use, copy, modify, merge, publish,
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   distribute, sublicense, and/or sell copies of the Software, and to
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   permit persons to whom the Software is furnished to do so, subject to
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   the following conditions:
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   The above copyright notice and this permission notice shall be included
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   in all copies or substantial portions of the Software.
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   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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   IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR
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   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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   OTHER DEALINGS IN THE SOFTWARE.
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   ----------------------------------------------------------------------- */
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#define LIBFFI_ASM
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#include 
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#include 
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#ifdef HAVE_MACHINE_ASM_H
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#include 
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#else
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/* XXX these lose for some platforms, I'm sure.  */
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#define CNAME(x) x
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#define ENTRY(x) .globl CNAME(x)! .type CNAME(x),%function! CNAME(x):
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#endif
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.text
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        /* R0:   ffi_prep_args */
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        /* R1:   &ecif */
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        /* R2:   cif->bytes */
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        /* R3:   fig->flags */
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        /* sp+0: ecif.rvalue */
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        /* sp+4: fn */
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        /* This assumes we are using gas.  */
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ENTRY(ffi_call_SYSV)
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        /* Save registers.  */
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        push    fp
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        push    lr
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        push    r3
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        push    r2
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        push    r1
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        push    r0
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        mv      fp, sp
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        /* Make room for all of the new args.  */
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        sub     sp, r2
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        /* Place all of the ffi_prep_args in position.  */
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        mv      lr, r0
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        mv      r0, sp
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        /* R1 already set.  */
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        /* And call.  */
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        jl      lr
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        /* Move first 4 parameters in registers...  */
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        ld      r0, @(0,sp)
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        ld      r1, @(4,sp)
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        ld      r2, @(8,sp)
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        ld      r3, @(12,sp)
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        /* ...and adjust the stack.  */
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        ld      lr, @(8,fp)
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        cmpi    lr, #16
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        bc      adjust_stack
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        ldi     lr, #16
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adjust_stack:
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        add     sp, lr
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        /* Call the function.  */
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        ld      lr, @(28,fp)
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        jl      lr
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        /* Remove the space we pushed for the args.  */
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        mv      sp, fp
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        /* Load R2 with the pointer to storage for the return value.  */
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        ld      r2, @(24,sp)
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        /* Load R3 with the return type code.  */
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        ld      r3, @(12,sp)
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        /* If the return value pointer is NULL, assume no return value.  */
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        beqz    r2, epilogue
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        /* Return INT.  */
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        ldi     r4, #FFI_TYPE_INT
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        bne     r3, r4, return_double
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        st      r0, @r2
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        bra     epilogue
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return_double:
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        /* Return DOUBLE or LONGDOUBLE.  */
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        ldi     r4, #FFI_TYPE_DOUBLE
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        bne     r3, r4, epilogue
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        st      r0, @r2
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        st      r1, @(4,r2)
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epilogue:
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        pop     r0
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        pop     r1
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        pop     r2
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        pop     r3
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        pop     lr
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        pop     fp
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        jmp lr
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.ffi_call_SYSV_end:
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        .size    CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV)

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