libffi/src/sparc/v8.S

/* -----------------------------------------------------------------------
   v8.S - Copyright (c) 1996, 1997 Cygnus Solutions
   
   Sparc Foreign Function Interface 

   $Id: v8.S,v 1.1.1.1 1998/11/29 16:48:16 green Exp $

   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 CYGNUS SOLUTIONS 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 <ffi.h>

#define STACKFRAME 96		/* Minimum stack framesize for SPARC */
#define ARGS (64+4)		/* Offset of register area in frame */

.text
        .align 8
.globl ffi_call_V8
.globl _ffi_call_V8

ffi_call_V8:
_ffi_call_V8:
	save	%sp, -STACKFRAME, %sp
	
	sub	%sp, %i2, %sp	! alloca() space in stack for frame to set up
	add	%sp, STACKFRAME, %l0	! %l0 has start of 
					! frame to set up

	mov	%l0, %o0	! call routine to set up frame
	call	%i0
	mov	%i1, %o1	! (delay)

	ld	[%l0+ARGS], %o0	! call foreign function
	ld	[%l0+ARGS+4], %o1
	ld	[%l0+ARGS+8], %o2
	ld	[%l0+ARGS+12], %o3
	ld	[%l0+ARGS+16], %o4
	ld	[%l0+ARGS+20], %o5
	call	%i5
	mov	%l0, %sp	! (delay) switch to frame
	nop			! STRUCT returning functions skip 12 instead of 8 bytes

	! If the return value pointer is NULL, assume no return value.
	tst	%i4
	bz	done
	nop

	cmp	%i3, FFI_TYPE_INT
	be,a	done
	st	%o0, [%i4]	! (delay)

	cmp	%i3, FFI_TYPE_FLOAT
	be,a	done
	st	%f0, [%i4+0]	! (delay)

	cmp	%i3, FFI_TYPE_SINT64
	be	longlong

	cmp	%i3, FFI_TYPE_DOUBLE
	bne	done
	nop
	st	%f0, [%i4+0]
	st	%f1, [%i4+4]
	
done:
	ret
	restore

longlong:
	st	%o0, [%i4+0]
	st	%o1, [%i4+4]
	ret
	restore

.ffi_call_V8_end:
        .size    ffi_call_V8,.ffi_call_V8_end-ffi_call_V8