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/* -----------------------------------------------------------------------
   ffi.c - Copyright (c) 2003, 2004 Kaz Kojima
 
   SuperH SHmedia 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 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.
   ----------------------------------------------------------------------- */
 
#include <ffi.h>
#include <ffi_common.h>
 
#include <stdlib.h>
 
#define NGREGARG 8
#define NFREGARG 12
 
static int
return_type (ffi_type *arg)
{
 
  if (arg->type != FFI_TYPE_STRUCT)
    return arg->type;
 
  /* gcc uses r2 if the result can be packed in on register.  */
  if (arg->size <= sizeof (UINT8))
    return FFI_TYPE_UINT8;
  else if (arg->size <= sizeof (UINT16))
    return FFI_TYPE_UINT16;
  else if (arg->size <= sizeof (UINT32))
    return FFI_TYPE_UINT32;
  else if (arg->size <= sizeof (UINT64))
    return FFI_TYPE_UINT64;
 
  return FFI_TYPE_STRUCT;
}
 
/* ffi_prep_args is called by the assembly routine once stack space
   has been allocated for the function's arguments */
 
/*@-exportheader@*/
void ffi_prep_args(char *stack, extended_cif *ecif)
/*@=exportheader@*/
{
  register unsigned int i;
  register unsigned int avn;
  register void **p_argv;
  register char *argp;
  register ffi_type **p_arg;
 
  argp = stack;
 
  if (return_type (ecif->cif->rtype) == FFI_TYPE_STRUCT)
    {
      *(void **) argp = ecif->rvalue;
      argp += sizeof (UINT64);
    }
 
  avn = ecif->cif->nargs;
  p_argv = ecif->avalue;
 
  for (i = 0, p_arg = ecif->cif->arg_types; i < avn; i++, p_arg++, p_argv++)
    {
      size_t z;
      int align;
 
      z = (*p_arg)->size;
      align = (*p_arg)->alignment;
      if (z < sizeof (UINT32))
        {
          switch ((*p_arg)->type)
            {
            case FFI_TYPE_SINT8:
              *(SINT64 *) argp = (SINT64) *(SINT8 *)(*p_argv);
              break;
 
            case FFI_TYPE_UINT8:
              *(UINT64 *) argp = (UINT64) *(UINT8 *)(*p_argv);
              break;
 
            case FFI_TYPE_SINT16:
              *(SINT64 *) argp = (SINT64) *(SINT16 *)(*p_argv);
              break;
 
            case FFI_TYPE_UINT16:
              *(UINT64 *) argp = (UINT64) *(UINT16 *)(*p_argv);
              break;
 
            case FFI_TYPE_STRUCT:
              memcpy (argp, *p_argv, z);
              break;
 
            default:
              FFI_ASSERT(0);
            }
          argp += sizeof (UINT64);
        }
      else if (z == sizeof (UINT32) && align == sizeof (UINT32))
        {
          switch ((*p_arg)->type)
            {
            case FFI_TYPE_INT:
            case FFI_TYPE_SINT32:
              *(SINT64 *) argp = (SINT64) *(SINT32 *) (*p_argv);
              break;
 
            case FFI_TYPE_FLOAT:
            case FFI_TYPE_POINTER:
            case FFI_TYPE_UINT32:
            case FFI_TYPE_STRUCT:
              *(UINT64 *) argp = (UINT64) *(UINT32 *) (*p_argv);
              break;
 
            default:
              FFI_ASSERT(0);
              break;
            }
          argp += sizeof (UINT64);
        }
      else if (z == sizeof (UINT64)
               && align == sizeof (UINT64)
               && ((int) *p_argv & (sizeof (UINT64) - 1)) == 0)
        {
          *(UINT64 *) argp = *(UINT64 *) (*p_argv);
          argp += sizeof (UINT64);
        }
      else
        {
          int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64);
 
          memcpy (argp, *p_argv, z);
          argp += n * sizeof (UINT64);
        }
    }
 
  return;
}
 
/* Perform machine dependent cif processing */
ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
  int i, j;
  int size, type;
  int n, m;
  int greg;
  int freg;
 
  greg = (return_type (cif->rtype) == FFI_TYPE_STRUCT ? 1 : 0);
  freg = 0;
  cif->flags2 = 0;
 
  for (i = j = 0; i < cif->nargs; i++)
    {
      type = (cif->arg_types)[i]->type;
      switch (type)
        {
        case FFI_TYPE_FLOAT:
          greg++;
          cif->bytes += sizeof (UINT64) - sizeof (float);
          if (freg >= NFREGARG - 1)
            continue;
          freg++;
          cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++);
          break;
 
        case FFI_TYPE_DOUBLE:
          if (greg++ >= NGREGARG && (freg + 1) >= NFREGARG)
            continue;
          if ((freg + 1) < NFREGARG)
            {
              freg = (freg + 1) & ~1;
              freg += 2;
              cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++);
            }
          else
            cif->flags2 += FFI_TYPE_INT << (2 * j++);
          break;
 
        default:
          size = (cif->arg_types)[i]->size;
          if (size < sizeof (UINT64))
            cif->bytes += sizeof (UINT64) - size;
          n = (size + sizeof (UINT64) - 1) / sizeof (UINT64);
          if (greg >= NGREGARG)
            continue;
          else if (greg + n - 1 >= NGREGARG)
            greg = NGREGARG;
          else
            greg += n;
          for (m = 0; m < n; m++)
            cif->flags2 += FFI_TYPE_INT << (2 * j++);
          break;
        }
    }
 
  /* Set the return type flag */
  switch (cif->rtype->type)
    {
    case FFI_TYPE_STRUCT:
      cif->flags = return_type (cif->rtype);
      break;
 
    case FFI_TYPE_VOID:
    case FFI_TYPE_FLOAT:
    case FFI_TYPE_DOUBLE:
    case FFI_TYPE_SINT64:
    case FFI_TYPE_UINT64:
      cif->flags = cif->rtype->type;
      break;
 
    default:
      cif->flags = FFI_TYPE_INT;
      break;
    }
 
  return FFI_OK;
}
 
/*@-declundef@*/
/*@-exportheader@*/
extern void ffi_call_SYSV(void (*)(char *, extended_cif *),
                          /*@out@*/ extended_cif *,
                          unsigned, unsigned, long long,
                          /*@out@*/ unsigned *,
                          void (*fn)());
/*@=declundef@*/
/*@=exportheader@*/
 
void ffi_call(/*@dependent@*/ ffi_cif *cif,
              void (*fn)(),
              /*@out@*/ void *rvalue,
              /*@dependent@*/ void **avalue)
{
  extended_cif ecif;
  UINT64 trvalue;
 
  ecif.cif = cif;
  ecif.avalue = avalue;
 
  /* If the return value is a struct and we don't have a return */
  /* value address then we need to make one                     */
 
  if (cif->rtype->type == FFI_TYPE_STRUCT
      && return_type (cif->rtype) != FFI_TYPE_STRUCT)
    ecif.rvalue = &trvalue;
  else if ((rvalue == NULL) &&
      (cif->rtype->type == FFI_TYPE_STRUCT))
    {
      /*@-sysunrecog@*/
      ecif.rvalue = alloca(cif->rtype->size);
      /*@=sysunrecog@*/
    }
  else
    ecif.rvalue = rvalue;
 
  switch (cif->abi)
    {
    case FFI_SYSV:
      /*@-usedef@*/
      ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,
                    cif->flags, cif->flags2, ecif.rvalue, fn);
      /*@=usedef@*/
      break;
    default:
      FFI_ASSERT(0);
      break;
    }
 
  if (rvalue
      && cif->rtype->type == FFI_TYPE_STRUCT
      && return_type (cif->rtype) != FFI_TYPE_STRUCT)
    memcpy (rvalue, &trvalue, cif->rtype->size);
}
 
extern void ffi_closure_SYSV (void);
extern void __ic_invalidate (void *line);
 
ffi_status
ffi_prep_closure (ffi_closure *closure,
                  ffi_cif *cif,
                  void (*fun)(ffi_cif*, void*, void**, void*),
                  void *user_data)
{
  unsigned int *tramp;
 
  FFI_ASSERT (cif->abi == FFI_GCC_SYSV);
 
  tramp = (unsigned int *) &closure->tramp[0];
  /* Since ffi_closure is an aligned object, the ffi trampoline is
     called as an SHcompact code.  Sigh.
     SHcompact part:
     mova @(1,pc),r0; add #1,r0; jmp @r0; nop;
     SHmedia part:
     movi fnaddr >> 16,r1; shori fnaddr,r1; ptabs/l r1,tr0
     movi cxt >> 16,r1; shori cxt,r1; blink tr0,r63  */
#ifdef __LITTLE_ENDIAN__
  tramp[0] = 0x7001c701;
  tramp[1] = 0x0009402b;
#else
  tramp[0] = 0xc7017001;
  tramp[1] = 0x402b0009;
#endif
  tramp[2] = 0xcc000010 | (((UINT32) ffi_closure_SYSV) >> 16) << 10;
  tramp[3] = 0xc8000010 | (((UINT32) ffi_closure_SYSV) & 0xffff) << 10;
  tramp[4] = 0x6bf10600;
  tramp[5] = 0xcc000010 | (((UINT32) closure) >> 16) << 10;
  tramp[6] = 0xc8000010 | (((UINT32) closure) & 0xffff) << 10;
  tramp[7] = 0x4401fff0;
 
  closure->cif = cif;
  closure->fun = fun;
  closure->user_data = user_data;
 
  /* Flush the icache.  */
  asm volatile ("ocbwb %0,0; synco; icbi %0,0; synci" : : "r" (tramp));
 
  return FFI_OK;
}
 
/* Basically the trampoline invokes ffi_closure_SYSV, and on
 * entry, r3 holds the address of the closure.
 * After storing the registers that could possibly contain
 * parameters to be passed into the stack frame and setting
 * up space for a return value, ffi_closure_SYSV invokes the
 * following helper function to do most of the work.
 */
 
int
ffi_closure_helper_SYSV (ffi_closure *closure, UINT64 *rvalue,
                         UINT64 *pgr, UINT64 *pfr, UINT64 *pst)
{
  void **avalue;
  ffi_type **p_arg;
  int i, avn;
  int greg, freg;
  ffi_cif *cif;
 
  cif = closure->cif;
  avalue = alloca (cif->nargs * sizeof (void *));
 
  /* Copy the caller's structure return value address so that the closure
     returns the data directly to the caller.  */
  if (return_type (cif->rtype) == FFI_TYPE_STRUCT)
    {
      rvalue = *pgr;
      greg = 1;
    }
  else
    greg = 0;
 
  freg = 0;
  cif = closure->cif;
  avn = cif->nargs;
 
  /* Grab the addresses of the arguments from the stack frame.  */
  for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++)
    {
      size_t z;
      void *p;
 
      z = (*p_arg)->size;
      if (z < sizeof (UINT32))
        {
          p = pgr + greg++;
 
          switch ((*p_arg)->type)
            {
            case FFI_TYPE_SINT8:
            case FFI_TYPE_UINT8:
            case FFI_TYPE_SINT16:
            case FFI_TYPE_UINT16:
            case FFI_TYPE_STRUCT:
#ifdef __LITTLE_ENDIAN__
              avalue[i] = p;
#else
              avalue[i] = ((char *) p) + sizeof (UINT32) - z;
#endif
              break;
 
            default:
              FFI_ASSERT(0);
            }
        }
      else if (z == sizeof (UINT32))
        {
          if ((*p_arg)->type == FFI_TYPE_FLOAT)
            {
              if (freg < NFREGARG - 1)
#ifdef __LITTLE_ENDIAN__
                avalue[i] = (UINT32 *) pfr + (1 ^ freg++);
#else
                avalue[i] = (UINT32 *) pfr + freg++;
#endif
              else
#ifdef __LITTLE_ENDIAN__
                avalue[i] = pgr + greg;
#else
                avalue[i] = (UINT32 *) (pgr + greg) + 1;
#endif
            }
          else
#ifdef __LITTLE_ENDIAN__
            avalue[i] = pgr + greg;
#else
            avalue[i] = (UINT32 *) (pgr + greg) + 1;
#endif
          greg++;
        }
      else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
        {
          if (freg + 1 >= NFREGARG)
            avalue[i] = pgr + greg;
          else
            {
              freg = (freg + 1) & ~1;
              avalue[i] = pfr + (freg >> 1);
              freg += 2;
            }
          greg++;
        }
      else
        {
          int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64);
 
          avalue[i] = pgr + greg;
          greg += n;
        }
    }
 
  (closure->fun) (cif, rvalue, avalue, closure->user_data);
 
  /* Tell ffi_closure_SYSV how to perform return type promotions.  */
  return return_type (cif->rtype);
}
 

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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libffi/] [src/] [sh64/] [ffi.c] - Blame information for rev 14

Line No.	Rev	Author	Line
1	14	jlechner	`/* -----------------------------------------------------------------------`
2			`ffi.c - Copyright (c) 2003, 2004 Kaz Kojima`
3
4			`SuperH SHmedia Foreign Function Interface`
5
6			`Permission is hereby granted, free of charge, to any person obtaining`
7			`a copy of this software and associated documentation files (the`
8			``Software''), to deal in the Software without restriction, including
9			`without limitation the rights to use, copy, modify, merge, publish,`
10			`distribute, sublicense, and/or sell copies of the Software, and to`
11			`permit persons to whom the Software is furnished to do so, subject to`
12			`the following conditions:`
13
14			`The above copyright notice and this permission notice shall be included`
15			`in all copies or substantial portions of the Software.`
16
17			THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
18			`OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF`
19			`MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.`
20			`IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR`
21			`OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,`
22			`ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR`
23			`OTHER DEALINGS IN THE SOFTWARE.`
24			`----------------------------------------------------------------------- */`
25
26			`#include <ffi.h>`
27			`#include <ffi_common.h>`
28
29			`#include <stdlib.h>`
30
31			`#define NGREGARG 8`
32			`#define NFREGARG 12`
33
34			`static int`
35			`return_type (ffi_type *arg)`
36			`{`
37
38			`if (arg->type != FFI_TYPE_STRUCT)`
39			`return arg->type;`
40
41			`/* gcc uses r2 if the result can be packed in on register. */`
42			`if (arg->size <= sizeof (UINT8))`
43			`return FFI_TYPE_UINT8;`
44			`else if (arg->size <= sizeof (UINT16))`
45			`return FFI_TYPE_UINT16;`
46			`else if (arg->size <= sizeof (UINT32))`
47			`return FFI_TYPE_UINT32;`
48			`else if (arg->size <= sizeof (UINT64))`
49			`return FFI_TYPE_UINT64;`
50
51			`return FFI_TYPE_STRUCT;`
52			`}`
53
54			`/* ffi_prep_args is called by the assembly routine once stack space`
55			`has been allocated for the function's arguments */`
56
57			`/@-exportheader@/`
58			`void ffi_prep_args(char stack, extended_cif ecif)`
59			`/@=exportheader@/`
60			`{`
61			`register unsigned int i;`
62			`register unsigned int avn;`
63			`register void **p_argv;`
64			`register char *argp;`
65			`register ffi_type **p_arg;`
66
67			`argp = stack;`
68
69			`if (return_type (ecif->cif->rtype) == FFI_TYPE_STRUCT)`
70			`{`
71			`(void *) argp = ecif->rvalue;`
72			`argp += sizeof (UINT64);`
73			`}`
74
75			`avn = ecif->cif->nargs;`
76			`p_argv = ecif->avalue;`
77
78			`for (i = 0, p_arg = ecif->cif->arg_types; i < avn; i++, p_arg++, p_argv++)`
79			`{`
80			`size_t z;`
81			`int align;`
82
83			`z = (*p_arg)->size;`
84			`align = (*p_arg)->alignment;`
85			`if (z < sizeof (UINT32))`
86			`{`
87			`switch ((*p_arg)->type)`
88			`{`
89			`case FFI_TYPE_SINT8:`
90			`(SINT64 ) argp = (SINT64) (SINT8 )(*p_argv);`
91			`break;`
92
93			`case FFI_TYPE_UINT8:`
94			`(UINT64 ) argp = (UINT64) (UINT8 )(*p_argv);`
95			`break;`
96
97			`case FFI_TYPE_SINT16:`
98			`(SINT64 ) argp = (SINT64) (SINT16 )(*p_argv);`
99			`break;`
100
101			`case FFI_TYPE_UINT16:`
102			`(UINT64 ) argp = (UINT64) (UINT16 )(*p_argv);`
103			`break;`
104
105			`case FFI_TYPE_STRUCT:`
106			`memcpy (argp, *p_argv, z);`
107			`break;`
108
109			`default:`
110			`FFI_ASSERT(0);`
111			`}`
112			`argp += sizeof (UINT64);`
113			`}`
114			`else if (z == sizeof (UINT32) && align == sizeof (UINT32))`
115			`{`
116			`switch ((*p_arg)->type)`
117			`{`
118			`case FFI_TYPE_INT:`
119			`case FFI_TYPE_SINT32:`
120			`(SINT64 ) argp = (SINT64) (SINT32 ) (*p_argv);`
121			`break;`
122
123			`case FFI_TYPE_FLOAT:`
124			`case FFI_TYPE_POINTER:`
125			`case FFI_TYPE_UINT32:`
126			`case FFI_TYPE_STRUCT:`
127			`(UINT64 ) argp = (UINT64) (UINT32 ) (*p_argv);`
128			`break;`
129
130			`default:`
131			`FFI_ASSERT(0);`
132			`break;`
133			`}`
134			`argp += sizeof (UINT64);`
135			`}`
136			`else if (z == sizeof (UINT64)`
137			`&& align == sizeof (UINT64)`
138			`&& ((int) *p_argv & (sizeof (UINT64) - 1)) == 0)`
139			`{`
140			`(UINT64 ) argp = (UINT64 ) (*p_argv);`
141			`argp += sizeof (UINT64);`
142			`}`
143			`else`
144			`{`
145			`int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64);`
146
147			`memcpy (argp, *p_argv, z);`
148			`argp += n * sizeof (UINT64);`
149			`}`
150			`}`
151
152			`return;`
153			`}`
154
155			`/* Perform machine dependent cif processing */`
156			`ffi_status ffi_prep_cif_machdep(ffi_cif *cif)`
157			`{`
158			`int i, j;`
159			`int size, type;`
160			`int n, m;`
161			`int greg;`
162			`int freg;`
163
164			`greg = (return_type (cif->rtype) == FFI_TYPE_STRUCT ? 1 : 0);`
165			`freg = 0;`
166			`cif->flags2 = 0;`
167
168			`for (i = j = 0; i < cif->nargs; i++)`
169			`{`
170			`type = (cif->arg_types)[i]->type;`
171			`switch (type)`
172			`{`
173			`case FFI_TYPE_FLOAT:`
174			`greg++;`
175			`cif->bytes += sizeof (UINT64) - sizeof (float);`
176			`if (freg >= NFREGARG - 1)`
177			`continue;`
178			`freg++;`
179			`cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++);`
180			`break;`
181
182			`case FFI_TYPE_DOUBLE:`
183			`if (greg++ >= NGREGARG && (freg + 1) >= NFREGARG)`
184			`continue;`
185			`if ((freg + 1) < NFREGARG)`
186			`{`
187			`freg = (freg + 1) & ~1;`
188			`freg += 2;`
189			`cif->flags2 += ((cif->arg_types)[i]->type) << (2 * j++);`
190			`}`
191			`else`
192			`cif->flags2 += FFI_TYPE_INT << (2 * j++);`
193			`break;`
194
195			`default:`
196			`size = (cif->arg_types)[i]->size;`
197			`if (size < sizeof (UINT64))`
198			`cif->bytes += sizeof (UINT64) - size;`
199			`n = (size + sizeof (UINT64) - 1) / sizeof (UINT64);`
200			`if (greg >= NGREGARG)`
201			`continue;`
202			`else if (greg + n - 1 >= NGREGARG)`
203			`greg = NGREGARG;`
204			`else`
205			`greg += n;`
206			`for (m = 0; m < n; m++)`
207			`cif->flags2 += FFI_TYPE_INT << (2 * j++);`
208			`break;`
209			`}`
210			`}`
211
212			`/* Set the return type flag */`
213			`switch (cif->rtype->type)`
214			`{`
215			`case FFI_TYPE_STRUCT:`
216			`cif->flags = return_type (cif->rtype);`
217			`break;`
218
219			`case FFI_TYPE_VOID:`
220			`case FFI_TYPE_FLOAT:`
221			`case FFI_TYPE_DOUBLE:`
222			`case FFI_TYPE_SINT64:`
223			`case FFI_TYPE_UINT64:`
224			`cif->flags = cif->rtype->type;`
225			`break;`
226
227			`default:`
228			`cif->flags = FFI_TYPE_INT;`
229			`break;`
230			`}`
231
232			`return FFI_OK;`
233			`}`
234
235			`/@-declundef@/`
236			`/@-exportheader@/`
237			`extern void ffi_call_SYSV(void ()(char , extended_cif *),`
238			`/@out@/ extended_cif *,`
239			`unsigned, unsigned, long long,`
240			`/@out@/ unsigned *,`
241			`void (*fn)());`
242			`/@=declundef@/`
243			`/@=exportheader@/`
244
245			`void ffi_call(/@dependent@/ ffi_cif *cif,`
246			`void (*fn)(),`
247			`/@out@/ void *rvalue,`
248			`/@dependent@/ void **avalue)`
249			`{`
250			`extended_cif ecif;`
251			`UINT64 trvalue;`
252
253			`ecif.cif = cif;`
254			`ecif.avalue = avalue;`
255
256			`/* If the return value is a struct and we don't have a return */`
257			`/* value address then we need to make one */`
258
259			`if (cif->rtype->type == FFI_TYPE_STRUCT`
260			`&& return_type (cif->rtype) != FFI_TYPE_STRUCT)`
261			`ecif.rvalue = &trvalue;`
262			`else if ((rvalue == NULL) &&`
263			`(cif->rtype->type == FFI_TYPE_STRUCT))`
264			`{`
265			`/@-sysunrecog@/`
266			`ecif.rvalue = alloca(cif->rtype->size);`
267			`/@=sysunrecog@/`
268			`}`
269			`else`
270			`ecif.rvalue = rvalue;`
271
272			`switch (cif->abi)`
273			`{`
274			`case FFI_SYSV:`
275			`/@-usedef@/`
276			`ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,`
277			`cif->flags, cif->flags2, ecif.rvalue, fn);`
278			`/@=usedef@/`
279			`break;`
280			`default:`
281			`FFI_ASSERT(0);`
282			`break;`
283			`}`
284
285			`if (rvalue`
286			`&& cif->rtype->type == FFI_TYPE_STRUCT`
287			`&& return_type (cif->rtype) != FFI_TYPE_STRUCT)`
288			`memcpy (rvalue, &trvalue, cif->rtype->size);`
289			`}`
290
291			`extern void ffi_closure_SYSV (void);`
292			`extern void __ic_invalidate (void *line);`
293
294			`ffi_status`
295			`ffi_prep_closure (ffi_closure *closure,`
296			`ffi_cif *cif,`
297			`void (fun)(ffi_cif, void, void, void),`
298			`void *user_data)`
299			`{`
300			`unsigned int *tramp;`
301
302			`FFI_ASSERT (cif->abi == FFI_GCC_SYSV);`
303
304			`tramp = (unsigned int *) &closure->tramp[0];`
305			`/* Since ffi_closure is an aligned object, the ffi trampoline is`
306			`called as an SHcompact code. Sigh.`
307			`SHcompact part:`
308			`mova @(1,pc),r0; add #1,r0; jmp @r0; nop;`
309			`SHmedia part:`
310			`movi fnaddr >> 16,r1; shori fnaddr,r1; ptabs/l r1,tr0`
311			`movi cxt >> 16,r1; shori cxt,r1; blink tr0,r63 */`
312			`#ifdef __LITTLE_ENDIAN__`
313			`tramp[0] = 0x7001c701;`
314			`tramp[1] = 0x0009402b;`
315			`#else`
316			`tramp[0] = 0xc7017001;`
317			`tramp[1] = 0x402b0009;`
318			`#endif`
319			`tramp[2] = 0xcc000010 \| (((UINT32) ffi_closure_SYSV) >> 16) << 10;`
320			`tramp[3] = 0xc8000010 \| (((UINT32) ffi_closure_SYSV) & 0xffff) << 10;`
321			`tramp[4] = 0x6bf10600;`
322			`tramp[5] = 0xcc000010 \| (((UINT32) closure) >> 16) << 10;`
323			`tramp[6] = 0xc8000010 \| (((UINT32) closure) & 0xffff) << 10;`
324			`tramp[7] = 0x4401fff0;`
325
326			`closure->cif = cif;`
327			`closure->fun = fun;`
328			`closure->user_data = user_data;`
329
330			`/* Flush the icache. */`
331			`asm volatile ("ocbwb %0,0; synco; icbi %0,0; synci" : : "r" (tramp));`
332
333			`return FFI_OK;`
334			`}`
335
336			`/* Basically the trampoline invokes ffi_closure_SYSV, and on`
337			`* entry, r3 holds the address of the closure.`
338			`* After storing the registers that could possibly contain`
339			`* parameters to be passed into the stack frame and setting`
340			`* up space for a return value, ffi_closure_SYSV invokes the`
341			`* following helper function to do most of the work.`
342			`*/`
343
344			`int`
345			`ffi_closure_helper_SYSV (ffi_closure closure, UINT64 rvalue,`
346			`UINT64 pgr, UINT64 pfr, UINT64 *pst)`
347			`{`
348			`void **avalue;`
349			`ffi_type **p_arg;`
350			`int i, avn;`
351			`int greg, freg;`
352			`ffi_cif *cif;`
353
354			`cif = closure->cif;`
355			`avalue = alloca (cif->nargs * sizeof (void *));`
356
357			`/* Copy the caller's structure return value address so that the closure`
358			`returns the data directly to the caller. */`
359			`if (return_type (cif->rtype) == FFI_TYPE_STRUCT)`
360			`{`
361			`rvalue = *pgr;`
362			`greg = 1;`
363			`}`
364			`else`
365			`greg = 0;`
366
367			`freg = 0;`
368			`cif = closure->cif;`
369			`avn = cif->nargs;`
370
371			`/* Grab the addresses of the arguments from the stack frame. */`
372			`for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++)`
373			`{`
374			`size_t z;`
375			`void *p;`
376
377			`z = (*p_arg)->size;`
378			`if (z < sizeof (UINT32))`
379			`{`
380			`p = pgr + greg++;`
381
382			`switch ((*p_arg)->type)`
383			`{`
384			`case FFI_TYPE_SINT8:`
385			`case FFI_TYPE_UINT8:`
386			`case FFI_TYPE_SINT16:`
387			`case FFI_TYPE_UINT16:`
388			`case FFI_TYPE_STRUCT:`
389			`#ifdef __LITTLE_ENDIAN__`
390			`avalue[i] = p;`
391			`#else`
392			`avalue[i] = ((char *) p) + sizeof (UINT32) - z;`
393			`#endif`
394			`break;`
395
396			`default:`
397			`FFI_ASSERT(0);`
398			`}`
399			`}`
400			`else if (z == sizeof (UINT32))`
401			`{`
402			`if ((*p_arg)->type == FFI_TYPE_FLOAT)`
403			`{`
404			`if (freg < NFREGARG - 1)`
405			`#ifdef __LITTLE_ENDIAN__`
406			`avalue[i] = (UINT32 *) pfr + (1 ^ freg++);`
407			`#else`
408			`avalue[i] = (UINT32 *) pfr + freg++;`
409			`#endif`
410			`else`
411			`#ifdef __LITTLE_ENDIAN__`
412			`avalue[i] = pgr + greg;`
413			`#else`
414			`avalue[i] = (UINT32 *) (pgr + greg) + 1;`
415			`#endif`
416			`}`
417			`else`
418			`#ifdef __LITTLE_ENDIAN__`
419			`avalue[i] = pgr + greg;`
420			`#else`
421			`avalue[i] = (UINT32 *) (pgr + greg) + 1;`
422			`#endif`
423			`greg++;`
424			`}`
425			`else if ((*p_arg)->type == FFI_TYPE_DOUBLE)`
426			`{`
427			`if (freg + 1 >= NFREGARG)`
428			`avalue[i] = pgr + greg;`
429			`else`
430			`{`
431			`freg = (freg + 1) & ~1;`
432			`avalue[i] = pfr + (freg >> 1);`
433			`freg += 2;`
434			`}`
435			`greg++;`
436			`}`
437			`else`
438			`{`
439			`int n = (z + sizeof (UINT64) - 1) / sizeof (UINT64);`
440
441			`avalue[i] = pgr + greg;`
442			`greg += n;`
443			`}`
444			`}`
445
446			`(closure->fun) (cif, rvalue, avalue, closure->user_data);`
447
448			`/* Tell ffi_closure_SYSV how to perform return type promotions. */`
449			`return return_type (cif->rtype);`
450			`}`
451