--- /dev/null
+/* -----------------------------------------------------------------------
+ osf.S - Copyright (c) 1998 Cygnus Solutions
+
+ Alpha/OSF Foreign Function Interface
+
+ $Id: osf.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 callback $16
+#define ecifp $17
+#define bytes $18
+#define flags $19
+#define raddr $20
+#define fn $21
+
+#define flags_ofs 16
+#define raddr_ofs 24
+#define fn_ofs 32
+
+#define SIZEOF_FRAME (6*8)
+
+ .text
+ .align 4
+ .globl ffi_call_osf
+ .ent ffi_call_osf
+
+ffi_call_osf:
+ lda $30, -SIZEOF_FRAME($30)
+ stq $26, 0($30)
+ stq $15, 8($30)
+ stq flags, flags_ofs($30)
+ stq raddr, raddr_ofs($30)
+ stq fn, fn_ofs($30)
+ mov $30, $15
+ .frame $15, SIZEOF_FRAME, $26, 0
+ .mask 0x4008000, -SIZEOF_FRAME
+ .prologue 0
+
+ mov callback, $27 # mov callback into place
+ subq $30, bytes, $30 # allocate stack space
+
+ # Call ffi_prep_args; ecif, bytes and flags are already in place.
+ mov $30, $16 # push stack arg
+ jsr $26, ($27), 0
+
+ # Load up all of the (potential) argument registers.
+ ldt $f16, 0($30)
+ ldt $f17, 8($30)
+ ldt $f18, 16($30)
+ ldt $f19, 24($30)
+ ldt $f20, 32($30)
+ ldt $f21, 40($30)
+ ldq $16, 48($30)
+ ldq $17, 56($30)
+ ldq $18, 64($30)
+ ldq $19, 72($30)
+ ldq $20, 80($30)
+ ldq $21, 88($30)
+
+ # Get rid of the arg reg temp space and call the function.
+ ldq $27, fn_ofs($15)
+ lda $30, 12*8($30)
+ jsr $26, ($27), 0
+
+ # If the return value pointer is NULL, assume no return value.
+ ldq raddr, raddr_ofs($15)
+ beq raddr, $noretval
+
+ ldq flags, flags_ofs($15)
+ cmpeq flags, FFI_TYPE_INT, $1
+ bne $1, $retint
+ cmpeq flags, FFI_TYPE_FLOAT, $2
+ bne $2, $retfloat
+ cmpeq flags, FFI_TYPE_DOUBLE, $3
+ bne $3, $retdouble
+ br $retstruct
+
+ .align 3
+$retint:
+ stq $0, 0(raddr)
+ br $noretval
+$retfloat:
+ sts $f0, 0(raddr)
+ br $noretval
+$retdouble:
+ stt $f0, 0(raddr)
+
+$retstruct:
+$noretval:
+ mov $15, $30
+ ldq $26, 0($15)
+ ldq $15, 8($15)
+ lda $30, SIZEOF_FRAME($30)
+ ret
+
+ .end ffi_call_osf
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