-----------------------------------------------------------------------
hpux32.S - Copyright (c) 2006 Free Software Foundation, Inc.
                     (c) 2008 Red Hat, Inc.
based on src/pa/linux.S

HP-UX PA 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 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>

     .LEVEL 1.1
     .SPACE  $PRIVATE$
     .IMPORT $global$,DATA
     .IMPORT $$dyncall,MILLICODE
     .SUBSPA $DATA$
     .align  4

        void ffi_call_pa32(void (*)(char *, extended_cif *),
                            extended_cif *ecif,
                            unsigned bytes,
                            unsigned flags,
                            unsigned *rvalue,
                            void (*fn)(void));
/

     .export ffi_call_pa32,ENTRY,PRIV_LEV=3
     .import ffi_prep_args_pa32,CODE

     .SPACE  $TEXT$
     .SUBSPA $CODE$
     .align  4

L$FB1 ffi_call_pa32

.proc
.callinfo       FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=4
.entry
stw     %rp, -20(%sp)
copy    %r3, %r1

L$CFI11

copy    %sp, %r3

L$CFI12

     /* Setup the stack for calling prep_args...
        We want the stack to look like this:

        [ Previous stack                            ] <- %r3

        [ 64-bytes register save area               ] <- %r4

        [ Stack space for actual call, passed as    ] <- %arg0
        [     arg0 to ffi_prep_args_pa32           ]

        [ Stack for calling prep_args               ] <- %sp
/

     stwm    %r1, 64(%sp)
     stw     %r4, 12(%r3)

L$CFI13

copy    %sp, %r4

addl    %arg2, %r4, %arg0       ; arg stack
stw     %arg3, -48(%r3)         ; save flags we need it later

/* Call prep_args:
   %arg0(stack) -- set up above
   %arg1(ecif)  -- same as incoming param
   %arg2(bytes) -- same as incoming param   
bl      ffi_prep_args_pa32,%r2
ldo     64(%arg0), %sp
ldo     -64(%sp), %sp

/* now %sp should point where %arg0 was pointing.  */

/* Load the arguments that should be passed in registers
   The fp args are loaded by the prep_args function.  */
ldw     -36(%sp), %arg0
ldw     -40(%sp), %arg1
ldw     -44(%sp), %arg2
ldw     -48(%sp), %arg3

/* in case the function is going to return a structure
   we need to give it a place to put the result.  */
ldw     -52(%r3), %ret0         ; %ret0 <- rvalue
ldw     -56(%r3), %r22          ; %r22 <- function to call
bl      $$dyncall, %r31         ; Call the user function
copy    %r31, %rp

/* Prepare to store the result; we need to recover flags and rvalue.  */
ldw     -48(%r3), %r21          ; r21 <- flags
ldw     -52(%r3), %r20          ; r20 <- rvalue

/* Store the result according to the return type.  The most
   likely types should come first.  */

L$checkint

comib,<>,n FFI_TYPE_INT, %r21, L$checkint8
b       L$done
stw     %ret0, 0(%r20)

L$checkint8

comib,<>,n FFI_TYPE_UINT8, %r21, L$checkint16
b       L$done
stb     %ret0, 0(%r20)

L$checkint16

comib,<>,n FFI_TYPE_UINT16, %r21, L$checkdbl
b       L$done
sth     %ret0, 0(%r20)

L$checkdbl

comib,<>,n FFI_TYPE_DOUBLE, %r21, L$checkfloat
b       L$done
fstd    %fr4,0(%r20)

L$checkfloat

comib,<>,n FFI_TYPE_FLOAT, %r21, L$checkll
b       L$done
fstw    %fr4L,0(%r20)

L$checkll

comib,<>,n FFI_TYPE_UINT64, %r21, L$checksmst2
stw     %ret0, 0(%r20)
b       L$done
stw     %ret1, 4(%r20)

L$checksmst2

comib,<>,n FFI_TYPE_SMALL_STRUCT2, %r21, L$checksmst3
/* 2-byte structs are returned in ret0 as ????xxyy.  */
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret0, 0(%r20)

L$checksmst3

comib,<>,n FFI_TYPE_SMALL_STRUCT3, %r21, L$checksmst4
/* 3-byte structs are returned in ret0 as ??xxyyzz.  */
extru   %ret0, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret0, 0(%r20)

L$checksmst4

comib,<>,n FFI_TYPE_SMALL_STRUCT4, %r21, L$checksmst5
/* 4-byte structs are returned in ret0 as wwxxyyzz.  */
extru   %ret0, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret0, 0(%r20)

L$checksmst5

comib,<>,n FFI_TYPE_SMALL_STRUCT5, %r21, L$checksmst6
/* 5 byte values are returned right justified:
      ret0     ret1
   5: ??????aa bbccddee */
stbs,ma %ret0, 1(%r20)
extru   %ret1, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret1, 0(%r20)

L$checksmst6

comib,<>,n FFI_TYPE_SMALL_STRUCT6, %r21, L$checksmst7
/* 6 byte values are returned right justified:
      ret0     ret1
   6: ????aabb ccddeeff */
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
stbs,ma %ret0, 1(%r20)
extru   %ret1, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret1, 0(%r20)

L$checksmst7

comib,<>,n FFI_TYPE_SMALL_STRUCT7, %r21, L$checksmst8
/* 7 byte values are returned right justified:
      ret0     ret1
   7: ??aabbcc ddeeffgg */
extru   %ret0, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
stbs,ma %ret0, 1(%r20)
extru   %ret1, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 23, 8, %r22
stbs,ma %r22, 1(%r20)
b       L$done
stb     %ret1, 0(%r20)

L$checksmst8

comib,<>,n FFI_TYPE_SMALL_STRUCT8, %r21, L$done
/* 8 byte values are returned right justified:
      ret0     ret1
   8: aabbccdd eeffgghh */
extru   %ret0, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret0, 23, 8, %r22
stbs,ma %r22, 1(%r20)
stbs,ma %ret0, 1(%r20)
extru   %ret1, 7, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 15, 8, %r22
stbs,ma %r22, 1(%r20)
extru   %ret1, 23, 8, %r22
stbs,ma %r22, 1(%r20)
stb     %ret1, 0(%r20)

L$done

/* all done, return */
copy    %r4, %sp        ; pop arg stack
ldw     12(%r3), %r4
ldwm    -64(%sp), %r3   ; .. and pop stack
ldw     -20(%sp), %rp
bv      %r0(%rp)
nop
.exit
.procend

L$FE1

/* void ffi_closure_pa32(void);
   Called with closure argument in %r21 */

.SPACE $TEXT$
.SUBSPA $CODE$
.export ffi_closure_pa32,ENTRY,PRIV_LEV=3,RTNVAL=GR
.import ffi_closure_inner_pa32,CODE
.align 4

L$FB2 ffi_closure_pa32

.proc
.callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3
.entry

stw     %rp, -20(%sp)
copy    %r3, %r1

L$CFI21

copy    %sp, %r3

L$CFI22

stwm    %r1, 64(%sp)

/* Put arguments onto the stack and call ffi_closure_inner.  */
stw     %arg0, -36(%r3)
stw     %arg1, -40(%r3)
stw     %arg2, -44(%r3)
stw     %arg3, -48(%r3)

copy    %r21, %arg0
bl      ffi_closure_inner_pa32, %r2
copy    %r3, %arg1
ldwm    -64(%sp), %r3
ldw     -20(%sp), %rp
ldw     -36(%sp), %ret0
bv      %r0(%rp)
ldw     -40(%sp), %ret1
.exit
.procend

L$FE2:

.SPACE $PRIVATE$
.SUBSPA $DATA$

.align 4
.EXPORT _GLOBAL__F_ffi_call_pa32,DATA

_GLOBAL__F_ffi_call_pa32 L$frame1:

.word   L$ECIE1-L$SCIE1 ;# Length of Common Information Entry

L$SCIE1:

.word   0x0     ;# CIE Identifier Tag
.byte   0x1     ;# CIE Version
.ascii "\0"     ;# CIE Augmentation
.uleb128 0x1    ;# CIE Code Alignment Factor
.sleb128 4      ;# CIE Data Alignment Factor
.byte   0x2     ;# CIE RA Column
.byte   0xc     ;# DW_CFA_def_cfa
.uleb128 0x1e
.uleb128 0x0
.align 4

L$ECIE1: L$SFDE1:

.word   L$EFDE1-L$ASFDE1        ;# FDE Length

L$ASFDE1:

.word   L$ASFDE1-L$frame1       ;# FDE CIE offset
.word   L$FB1   ;# FDE initial location
.word   L$FE1-L$FB1     ;# FDE address range

.byte   0x4     ;# DW_CFA_advance_loc4
.word   L$CFI11-L$FB1
.byte   0x83    ;# DW_CFA_offset, column 0x3
.uleb128 0x0
.byte   0x11    ;# DW_CFA_offset_extended_sf; save r2 at [r30-20]
.uleb128 0x2
.sleb128 -5

.byte   0x4     ;# DW_CFA_advance_loc4
.word   L$CFI12-L$CFI11
.byte   0xd     ;# DW_CFA_def_cfa_register = r3
.uleb128 0x3

.byte   0x4     ;# DW_CFA_advance_loc4
.word   L$CFI13-L$CFI12
.byte   0x84    ;# DW_CFA_offset, column 0x4
.uleb128 0x3

.align 4

L$EFDE1:

L$SFDE2:

.word   L$EFDE2-L$ASFDE2        ;# FDE Length

L$ASFDE2:

.word   L$ASFDE2-L$frame1       ;# FDE CIE offset
.word   L$FB2   ;# FDE initial location
.word   L$FE2-L$FB2     ;# FDE address range
.byte   0x4     ;# DW_CFA_advance_loc4
.word   L$CFI21-L$FB2
.byte   0x83    ;# DW_CFA_offset, column 0x3
.uleb128 0x0
.byte   0x11    ;# DW_CFA_offset_extended_sf
.uleb128 0x2
.sleb128 -5

.byte   0x4     ;# DW_CFA_advance_loc4
.word   L$CFI22-L$CFI21
.byte   0xd     ;# DW_CFA_def_cfa_register = r3
.uleb128 0x3

.align 4

L$EFDE2: