-----------------------------------------------------------------------
v8.S - Copyright (c) 1996, 1997, 2003, 2004, 2008 Red Hat, Inc.

SPARC 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>

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: .LLFB1:

save    %sp, -STACKFRAME, %sp

.LLCFI0:

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_DOUBLE
be,a    double
st      %f0, [%i4+0]    ! (delay)

cmp     %i3, FFI_TYPE_SINT8
be,a    sint8
sll     %o0, 24, %o0    ! (delay)

cmp     %i3, FFI_TYPE_UINT8
be,a    uint8
sll     %o0, 24, %o0    ! (delay)

cmp     %i3, FFI_TYPE_SINT16
be,a    sint16
sll     %o0, 16, %o0    ! (delay)

cmp     %i3, FFI_TYPE_UINT16
be,a    uint16
sll     %o0, 16, %o0    ! (delay)

cmp     %i3, FFI_TYPE_SINT64
be,a    longlong
st      %o0, [%i4+0]    ! (delay)

done:

ret
restore

double:

st      %f1, [%i4+4]
ret
restore

sint8:

sra     %o0, 24, %o0
st      %o0, [%i4+0]
ret
restore

uint8:

srl     %o0, 24, %o0
st      %o0, [%i4+0]
ret
restore

sint16:

sra     %o0, 16, %o0
st      %o0, [%i4+0]
ret
restore

uint16:

srl     %o0, 16, %o0
st      %o0, [%i4+0]
ret
restore

longlong:

st      %o1, [%i4+4]
ret
restore

.LLFE1:

.ffi_call_v8_end:

.size   ffi_call_v8,.ffi_call_v8_end-ffi_call_v8

undef STACKFRAME define STACKFRAME 104 /* 16*4 register window +

1*4 struct return +  
6*4 args backing store +
3*4 locals */

/* ffi_closure_v8(…)

Receives the closure argument in %g2.   */

     .text
     .align 8
     .globl ffi_closure_v8

ffi_closure_v8: ifdef HAVE_AS_REGISTER_PSEUDO_OP

.register       %g2, #scratch

endif .LLFB2:

! Reserve frame space for all arguments in case
! we need to align them on a 8-byte boundary.
ld      [%g2+FFI_TRAMPOLINE_SIZE], %g1
ld      [%g1+4], %g1
sll     %g1, 3, %g1
add     %g1, STACKFRAME, %g1
! %g1 == STACKFRAME + 8*nargs
neg     %g1
save    %sp, %g1, %sp

.LLCFI1:

! Store all of the potential argument registers in va_list format.
st      %i0, [%fp+68+0]
st      %i1, [%fp+68+4]
st      %i2, [%fp+68+8]
st      %i3, [%fp+68+12]
st      %i4, [%fp+68+16]
st      %i5, [%fp+68+20]

! Call ffi_closure_sparc_inner to do the bulk of the work.
mov     %g2, %o0
add     %fp, -8, %o1
add     %fp,  64, %o2
call    ffi_closure_sparc_inner_v8
 add    %fp, -16, %o3

! Load up the return value in the proper type.
! See ffi_prep_cif_machdep for the list of cases.
cmp     %o0, FFI_TYPE_VOID
be      done1

cmp     %o0, FFI_TYPE_INT
be      done1
 ld     [%fp-8], %i0

cmp     %o0, FFI_TYPE_FLOAT
be,a    done1
 ld     [%fp-8], %f0

cmp     %o0, FFI_TYPE_DOUBLE
be,a    done1
 ldd    [%fp-8], %f0

if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE

cmp     %o0, FFI_TYPE_LONGDOUBLE
be      done2

endif

cmp     %o0, FFI_TYPE_STRUCT
be      done2

cmp     %o0, FFI_TYPE_SINT64
be,a    done1
 ldd    [%fp-8], %i0

ld      [%fp-8], %i0

done1:

jmp     %i7+8
 restore

done2:

! Skip 'unimp'.
jmp     %i7+12
 restore

.LLFE2:

.ffi_closure_v8_end:

.size   ffi_closure_v8,.ffi_closure_v8_end-ffi_closure_v8

ifdef SPARC64 define WS 8 define nword xword define uanword uaxword else define WS 4 define nword long define uanword uaword endif

ifdef HAVE_RO_EH_FRAME

.section        ".eh_frame",#alloc

else

.section        ".eh_frame",#alloc,#write

endif .LLframe1:

.uaword .LLECIE1-.LLSCIE1       ! Length of Common Information Entry

.LLSCIE1:

.uaword 0x0     ! CIE Identifier Tag
.byte   0x1     ! CIE Version
.ascii "zR\0"   ! CIE Augmentation
.byte   0x1     ! uleb128 0x1; CIE Code Alignment Factor
.byte   0x80-WS ! sleb128 -WS; CIE Data Alignment Factor
.byte   0xf     ! CIE RA Column
.byte   0x1     ! uleb128 0x1; Augmentation size

ifdef HAVE_AS_SPARC_UA_PCREL

.byte   0x1b    ! FDE Encoding (pcrel sdata4)

else

.byte   0x50    ! FDE Encoding (aligned absolute)

endif

.byte   0xc     ! DW_CFA_def_cfa
.byte   0xe     ! uleb128 0xe
.byte   0x0     ! uleb128 0x0
.align  WS

.LLECIE1: .LLSFDE1:

.uaword .LLEFDE1-.LLASFDE1      ! FDE Length

.LLASFDE1:

.uaword .LLASFDE1-.LLframe1     ! FDE CIE offset

ifdef HAVE_AS_SPARC_UA_PCREL

.uaword %r_disp32(.LLFB1)
.uaword .LLFE1-.LLFB1   ! FDE address range

else

.align  WS
.nword  .LLFB1
.uanword .LLFE1-.LLFB1  ! FDE address range

endif

.byte   0x0     ! uleb128 0x0; Augmentation size
.byte   0x4     ! DW_CFA_advance_loc4
.uaword .LLCFI0-.LLFB1
.byte   0xd     ! DW_CFA_def_cfa_register
.byte   0x1e    ! uleb128 0x1e
.byte   0x2d    ! DW_CFA_GNU_window_save
.byte   0x9     ! DW_CFA_register
.byte   0xf     ! uleb128 0xf
.byte   0x1f    ! uleb128 0x1f
.align  WS

.LLEFDE1: .LLSFDE2:

.uaword .LLEFDE2-.LLASFDE2      ! FDE Length

.LLASFDE2:

.uaword .LLASFDE2-.LLframe1     ! FDE CIE offset

ifdef HAVE_AS_SPARC_UA_PCREL

.uaword %r_disp32(.LLFB2)
.uaword .LLFE2-.LLFB2   ! FDE address range

else

.align  WS
.nword  .LLFB2
.uanword .LLFE2-.LLFB2  ! FDE address range

endif

.byte   0x0     ! uleb128 0x0; Augmentation size
.byte   0x4     ! DW_CFA_advance_loc4
.uaword .LLCFI1-.LLFB2
.byte   0xd     ! DW_CFA_def_cfa_register
.byte   0x1e    ! uleb128 0x1e
.byte   0x2d    ! DW_CFA_GNU_window_save
.byte   0x9     ! DW_CFA_register
.byte   0xf     ! uleb128 0xf
.byte   0x1f    ! uleb128 0x1f
.align  WS

.LLEFDE2:

if defined __ELF__ && defined __linux__

.section        .note.GNU-stack,"",@progbits

endif