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Moved ia64 files

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green
2001-04-22 18:10:20 +00:00
parent 6e2de5eee3
commit 1359dfc658
3 changed files with 1033 additions and 0 deletions
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670
libffi/ia64/ffi.c Normal file
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/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 1998 Cygnus Solutions
Copyright (c) 2000 Hewlett Packard Company
IA64 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>
#include "ia64_flags.h"
/* Memory image of fp register contents. Should eventually be an fp */
/* type long enough to hold an entire register. For now we use double. */
typedef double float80;
/* The stack layout at call to ffi_prep_regs. Other_args will remain */
/* on the stack for the actual call. Everything else we be transferred */
/* to registers and popped by the assembly code. */
struct ia64_args {
long scratch[2]; /* Two scratch words at top of stack. */
/* Allows sp to passed as arg pointer. */
void * r8_contents; /* Value to be passed in r8 */
long spare; /* Not used. */
float80 fp_regs[8]; /* Contents of 8 floating point argument */
/* registers. */
long out_regs[8]; /* Contents of the 8 out registers used */
/* for integer parameters. */
long other_args[0]; /* Arguments passed on stack, variable size */
/* Treated as continuation of out_regs. */
};
static size_t float_type_size(unsigned short tp)
{
switch(tp) {
case FFI_TYPE_FLOAT:
return sizeof(float);
case FFI_TYPE_DOUBLE:
return sizeof(double);
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
case FFI_TYPE_LONGDOUBLE:
return sizeof(long double);
#endif
default:
FFI_ASSERT(0);
}
}
/*
* Is type a struct containing at most n floats, doubles, or extended
* doubles, all of the same fp type?
* If so, set *element_type to the fp type.
*/
static bool is_homogeneous_fp_aggregate(ffi_type * type, int n,
unsigned short * element_type)
{
ffi_type **ptr;
unsigned short element, struct_element;
int type_set = 0;
FFI_ASSERT(type != NULL);
FFI_ASSERT(type->elements != NULL);
ptr = &(type->elements[0]);
while ((*ptr) != NULL)
{
switch((*ptr) -> type) {
case FFI_TYPE_FLOAT:
if (type_set && element != FFI_TYPE_FLOAT) return 0;
if (--n < 0) return FALSE;
type_set = 1;
element = FFI_TYPE_FLOAT;
break;
case FFI_TYPE_DOUBLE:
if (type_set && element != FFI_TYPE_DOUBLE) return 0;
if (--n < 0) return FALSE;
type_set = 1;
element = FFI_TYPE_DOUBLE;
break;
case FFI_TYPE_STRUCT:
if (!is_homogeneous_fp_aggregate(type, n, &struct_element))
return FALSE;
if (type_set && struct_element != element) return FALSE;
n -= (type -> size)/float_type_size(element);
element = struct_element;
if (n < 0) return FALSE;
break;
/* case FFI_TYPE_LONGDOUBLE:
Not yet implemented. */
default:
return FALSE;
}
ptr++;
}
*element_type = element;
return TRUE;
}
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments. Returns nonzero
if fp registers are used for arguments. */
static bool
ffi_prep_args(struct ia64_args *stack, extended_cif *ecif, int bytes)
{
register long i, avn;
register void **p_argv;
register long *argp = stack -> out_regs;
register float80 *fp_argp = stack -> fp_regs;
register ffi_type **p_arg;
/* For big return structs, r8 needs to contain the target address. */
/* Since r8 is otherwise dead, we set it unconditionally. */
stack -> r8_contents = ecif -> rvalue;
i = 0;
avn = ecif->cif->nargs;
p_arg = ecif->cif->arg_types;
p_argv = ecif->avalue;
while (i < avn)
{
size_t z; /* z is in units of arg slots or words, not bytes. */
switch ((*p_arg)->type)
{
case FFI_TYPE_SINT8:
z = 1;
*(SINT64 *) argp = *(SINT8 *)(* p_argv);
break;
case FFI_TYPE_UINT8:
z = 1;
*(UINT64 *) argp = *(UINT8 *)(* p_argv);
break;
case FFI_TYPE_SINT16:
z = 1;
*(SINT64 *) argp = *(SINT16 *)(* p_argv);
break;
case FFI_TYPE_UINT16:
z = 1;
*(UINT64 *) argp = *(UINT16 *)(* p_argv);
break;
case FFI_TYPE_SINT32:
z = 1;
*(SINT64 *) argp = *(SINT32 *)(* p_argv);
break;
case FFI_TYPE_UINT32:
z = 1;
*(UINT64 *) argp = *(UINT32 *)(* p_argv);
break;
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_POINTER:
z = 1;
*(UINT64 *) argp = *(UINT64 *)(* p_argv);
break;
case FFI_TYPE_FLOAT:
z = 1;
if (fp_argp - stack->fp_regs < 8)
{
/* Note the conversion -- all the fp regs are loaded as
doubles. */
*fp_argp++ = *(float *)(* p_argv);
}
/* Also put it into the integer registers or memory: */
*(UINT64 *) argp = *(UINT32 *)(* p_argv);
break;
case FFI_TYPE_DOUBLE:
z = 1;
if (fp_argp - stack->fp_regs < 8)
*fp_argp++ = *(double *)(* p_argv);
/* Also put it into the integer registers or memory: */
*(double *) argp = *(double *)(* p_argv);
break;
case FFI_TYPE_STRUCT:
{
size_t sz = (*p_arg)->size;
unsigned short element_type;
z = ((*p_arg)->size + SIZEOF_ARG - 1)/SIZEOF_ARG;
if (is_homogeneous_fp_aggregate(*p_arg, 8, &element_type)) {
int i;
int nelements = sz/float_type_size(element_type);
for (i = 0; i < nelements; ++i) {
switch (element_type) {
case FFI_TYPE_FLOAT:
if (fp_argp - stack->fp_regs < 8)
*fp_argp++ = ((float *)(* p_argv))[i];
break;
case FFI_TYPE_DOUBLE:
if (fp_argp - stack->fp_regs < 8)
*fp_argp++ = ((double *)(* p_argv))[i];
break;
default:
/* Extended precision not yet implemented. */
abort();
}
}
}
/* And pass it in integer registers as a struct, with */
/* its actual field sizes packed into registers. */
memcpy(argp, *p_argv, (*p_arg)->size);
}
break;
default:
FFI_ASSERT(0);
}
argp += z;
i++, p_arg++, p_argv++;
}
return (fp_argp != stack -> fp_regs);
}
/* Perform machine dependent cif processing */
ffi_status
ffi_prep_cif_machdep(ffi_cif *cif)
{
long i, avn;
bool is_simple = TRUE;
long simple_flag = FFI_SIMPLE_V;
/* Adjust cif->bytes to include space for the 2 scratch words,
r8 register contents, spare word,
the 8 fp register contents, and all 8 integer register contents.
This will be removed before the call, though 2 scratch words must
remain. */
cif->bytes += 4*sizeof(long) + 8 *sizeof(float80);
if (cif->bytes < sizeof(struct ia64_args))
cif->bytes = sizeof(struct ia64_args);
/* The stack must be double word aligned, so round bytes up
appropriately. */
cif->bytes = ALIGN(cif->bytes, 2*sizeof(void*));
avn = cif->nargs;
if (avn <= 2) {
for (i = 0; i < avn; ++i) {
switch(cif -> arg_types[i] -> type) {
case FFI_TYPE_SINT32:
simple_flag = FFI_ADD_INT_ARG(simple_flag);
break;
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_POINTER:
simple_flag = FFI_ADD_LONG_ARG(simple_flag);
break;
default:
is_simple = FALSE;
}
}
} else {
is_simple = FALSE;
}
/* Set the return type flag */
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
cif->flags = FFI_TYPE_VOID;
break;
case FFI_TYPE_STRUCT:
{
size_t sz = cif -> rtype -> size;
unsigned short element_type;
is_simple = FALSE;
if (is_homogeneous_fp_aggregate(cif -> rtype, 8, &element_type)) {
int nelements = sz/float_type_size(element_type);
if (nelements <= 1) {
if (0 == nelements) {
cif -> flags = FFI_TYPE_VOID;
} else {
cif -> flags = element_type;
}
} else {
switch(element_type) {
case FFI_TYPE_FLOAT:
cif -> flags = FFI_IS_FLOAT_FP_AGGREGATE | nelements;
break;
case FFI_TYPE_DOUBLE:
cif -> flags = FFI_IS_DOUBLE_FP_AGGREGATE | nelements;
break;
default:
/* long double NYI */
abort();
}
}
break;
}
if (sz <= 32) {
if (sz <= 8) {
cif->flags = FFI_TYPE_INT;
} else if (sz <= 16) {
cif->flags = FFI_IS_SMALL_STRUCT2;
} else if (sz <= 24) {
cif->flags = FFI_IS_SMALL_STRUCT3;
} else {
cif->flags = FFI_IS_SMALL_STRUCT4;
}
} else {
cif->flags = FFI_TYPE_STRUCT;
}
}
break;
case FFI_TYPE_FLOAT:
is_simple = FALSE;
cif->flags = FFI_TYPE_FLOAT;
break;
case FFI_TYPE_DOUBLE:
is_simple = FALSE;
cif->flags = FFI_TYPE_DOUBLE;
break;
default:
cif->flags = FFI_TYPE_INT;
/* This seems to depend on little endian mode, and the fact that */
/* the return pointer always points to at least 8 bytes. But */
/* that also seems to be true for other platforms. */
break;
}
if (is_simple) cif -> flags |= simple_flag;
return FFI_OK;
}
extern int ffi_call_unix(bool (*)(struct ia64_args *, extended_cif *, int),
extended_cif *, unsigned,
unsigned, unsigned *, void (*)());
void
ffi_call(ffi_cif *cif, void (*fn)(), void *rvalue, void **avalue)
{
extended_cif ecif;
long simple = cif -> flags & FFI_SIMPLE;
/* Should this also check for Unix ABI? */
/* This is almost, but not quite, machine independent. Note that */
/* we can get away with not caring about length of the result because */
/* we assume we are little endian, and the result buffer is large */
/* enough. */
/* This needs work for HP/UX. */
if (simple) {
long (*lfn)() = (long (*)())fn;
long result;
switch(simple) {
case FFI_SIMPLE_V:
result = lfn();
break;
case FFI_SIMPLE_I:
result = lfn(*(int *)avalue[0]);
break;
case FFI_SIMPLE_L:
result = lfn(*(long *)avalue[0]);
break;
case FFI_SIMPLE_II:
result = lfn(*(int *)avalue[0], *(int *)avalue[1]);
break;
case FFI_SIMPLE_IL:
result = lfn(*(int *)avalue[0], *(long *)avalue[1]);
break;
case FFI_SIMPLE_LI:
result = lfn(*(long *)avalue[0], *(int *)avalue[1]);
break;
case FFI_SIMPLE_LL:
result = lfn(*(long *)avalue[0], *(long *)avalue[1]);
break;
}
if ((cif->flags & ~FFI_SIMPLE) != FFI_TYPE_VOID && 0 != rvalue) {
* (long *)rvalue = result;
}
return;
}
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 (rvalue == NULL && cif->rtype->type == FFI_TYPE_STRUCT)
ecif.rvalue = alloca(cif->rtype->size);
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
case FFI_UNIX:
ffi_call_unix(ffi_prep_args, &ecif, cif->bytes,
cif->flags, rvalue, fn);
break;
default:
FFI_ASSERT(0);
break;
}
}
/*
* Closures represent a pair consisting of a function pointer, and
* some user data. A closure is invoked by reinterpreting the closure
* as a function pointer, and branching to it. Thus we can make an
* interpreted function callable as a C function: We turn the interpreter
* itself, together with a pointer specifying the interpreted procedure,
* into a closure.
* On X86, the first few words of the closure structure actually contain code,
* which will do the right thing. On most other architectures, this
* would raise some Icache/Dcache coherence issues (which can be solved, but
* often not cheaply).
* For IA64, function pointer are already pairs consisting of a code
* pointer, and a gp pointer. The latter is needed to access global variables.
* Here we set up such a pair as the first two words of the closure (in
* the "trampoline" area), but we replace the gp pointer with a pointer
* to the closure itself. We also add the real gp pointer to the
* closure. This allows the function entry code to both retrieve the
* user data, and to restire the correct gp pointer.
*/
static void
ffi_prep_incoming_args_UNIX(struct ia64_args *args, void **rvalue,
void **avalue, ffi_cif *cif);
/* This function is entered with the doctored gp (r1) value.
* This code is extremely gcc specific. There is some argument that
* it should really be written in assembly code, since it depends on
* gcc properties that might change over time.
*/
/* ffi_closure_UNIX is an assembly routine, which copies the register */
/* state into s struct ia64_args, and the invokes */
/* ffi_closure_UNIX_inner. It also recovers the closure pointer */
/* from its fake gp pointer. */
void ffi_closure_UNIX();
#ifndef __GNUC__
# error This requires gcc
#endif
void
ffi_closure_UNIX_inner (ffi_closure *closure, struct ia64_args * args)
/* Hopefully declarint this as a varargs function will force all args */
/* to memory. */
{
// this is our return value storage
long double res;
// our various things...
ffi_cif *cif;
unsigned short rtype;
void *resp;
void **arg_area;
resp = (void*)&res;
cif = closure->cif;
arg_area = (void**) alloca (cif->nargs * sizeof (void*));
/* this call will initialize ARG_AREA, such that each
* element in that array points to the corresponding
* value on the stack; and if the function returns
* a structure, it will re-set RESP to point to the
* structure return address. */
ffi_prep_incoming_args_UNIX(args, (void**)&resp, arg_area, cif);
(closure->fun) (cif, resp, arg_area, closure->user_data);
rtype = cif->flags;
/* now, do a generic return based on the value of rtype */
if (rtype == FFI_TYPE_INT)
{
asm volatile ("ld8 r8=[%0]" : : "r" (resp) : "r8");
}
else if (rtype == FFI_TYPE_FLOAT)
{
asm volatile ("ldfs f8=[%0]" : : "r" (resp) : "f8");
}
else if (rtype == FFI_TYPE_DOUBLE)
{
asm volatile ("ldfd f8=[%0]" : : "r" (resp) : "f8");
}
else if (rtype == FFI_IS_SMALL_STRUCT2)
{
asm volatile ("ld8 r8=[%0]; ld8 r9=[%1]"
: : "r" (resp), "r" (resp+8) : "r8","r9");
}
else if (rtype == FFI_IS_SMALL_STRUCT3)
{
asm volatile ("ld8 r8=[%0]; ld8 r9=[%1]; ld8 r10=[%2]"
: : "r" (resp), "r" (resp+8), "r" (resp+16)
: "r8","r9","r10");
}
else if (rtype == FFI_IS_SMALL_STRUCT4)
{
asm volatile ("ld8 r8=[%0]; ld8 r9=[%1]; ld8 r10=[%2]; ld8 r11=[%3]"
: : "r" (resp), "r" (resp+8), "r" (resp+16), "r" (resp+24)
: "r8","r9","r10","r11");
}
else if (rtype != FFI_TYPE_VOID && rtype != FFI_TYPE_STRUCT)
{
/* Can only happen for homogeneous FP aggregates? */
abort();
}
}
static void
ffi_prep_incoming_args_UNIX(struct ia64_args *args, void **rvalue,
void **avalue, ffi_cif *cif)
{
register unsigned int i;
register unsigned int avn;
register void **p_argv;
register unsigned long *argp = args -> out_regs;
unsigned fp_reg_num = 0;
register ffi_type **p_arg;
avn = cif->nargs;
p_argv = avalue;
for (i = cif->nargs, p_arg = cif->arg_types; i != 0; i--, p_arg++)
{
size_t z; /* In units of words or argument slots. */
switch ((*p_arg)->type)
{
case FFI_TYPE_SINT8:
case FFI_TYPE_UINT8:
case FFI_TYPE_SINT16:
case FFI_TYPE_UINT16:
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_POINTER:
z = 1;
*p_argv = (void *)argp;
break;
case FFI_TYPE_FLOAT:
z = 1;
/* Convert argument back to float in place from the saved value */
if (fp_reg_num < 8) {
*(float *)argp = args -> fp_regs[fp_reg_num++];
} else {
*(float *)argp = *(double *)argp;
}
*p_argv = (void *)argp;
break;
case FFI_TYPE_DOUBLE:
z = 1;
if (fp_reg_num < 8) {
*p_argv = args -> fp_regs + fp_reg_num++;
} else {
*p_argv = (void *)argp;
}
break;
case FFI_TYPE_STRUCT:
{
size_t sz = (*p_arg)->size;
unsigned short element_type;
z = ((*p_arg)->size + SIZEOF_ARG - 1)/SIZEOF_ARG;
if (is_homogeneous_fp_aggregate(*p_arg, 8, &element_type)) {
int nelements = sz/float_type_size(element_type);
if (nelements + fp_reg_num >= 8) {
/* hard case NYI. */
abort();
}
if (element_type == FFI_TYPE_DOUBLE) {
*p_argv = args -> fp_regs + fp_reg_num;
fp_reg_num += nelements;
break;
}
if (element_type == FFI_TYPE_FLOAT) {
int j;
for (j = 0; j < nelements; ++ j) {
((float *)argp)[j] = args -> fp_regs[fp_reg_num + j];
}
*p_argv = (void *)argp;
fp_reg_num += nelements;
break;
}
abort(); /* Other fp types NYI */
}
}
break;
default:
FFI_ASSERT(0);
}
argp += z;
p_argv++;
}
return;
}
/* Fill in a closure to refer to the specified fun and user_data. */
/* cif specifies the argument and result types for fun. */
/* the cif must already be prep'ed */
/* The layout of a function descriptor. A C function pointer really */
/* points to one of these. */
typedef struct ia64_fd_struct {
void *code_pointer;
void *gp;
} ia64_fd;
ffi_status
ffi_prep_closure (ffi_closure* closure,
ffi_cif* cif,
void (*fun)(ffi_cif*,void*,void**,void*),
void *user_data)
{
struct ffi_ia64_trampoline_struct *tramp =
(struct ffi_ia64_trampoline_struct *) (closure -> tramp);
ia64_fd *fd = (ia64_fd *)(void *)ffi_closure_UNIX;
FFI_ASSERT (cif->abi == FFI_UNIX);
tramp -> code_pointer = fd -> code_pointer;
tramp -> real_gp = fd -> gp;
tramp -> fake_gp = closure;
closure->cif = cif;
closure->user_data = user_data;
closure->fun = fun;
return FFI_OK;
}

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libffi/ia64/ia64_flags.h Normal file
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/* -----------------------------------------------------------------------
ia64_flags.h - Copyright (c) 2000 Hewlett Packard Company
IA64/unix Foreign Function Interface
Original author: Hans Boehm, HP Labs
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.
----------------------------------------------------------------------- */
/* Homogeneous Floating Point Aggregates (HFAs) which are returned */
/* in FP registers. The least significant bits specify the size in */
/* words. */
#define FFI_IS_FLOAT_FP_AGGREGATE 0x1000
#define FFI_IS_DOUBLE_FP_AGGREGATE 0x0800
#define FLOAT_FP_AGGREGATE_BIT 12
#define DOUBLE_FP_AGGREGATE_BIT 11
/* Small structures containing N words. If N=1, they are returned */
/* as though they were integers. */
#define FFI_IS_SMALL_STRUCT2 0x40 /* Struct > 8, <=16 bytes */
#define FFI_IS_SMALL_STRUCT3 0x41 /* Struct > 16 <= 24 bytes */
#define FFI_IS_SMALL_STRUCT4 0x42 /* Struct > 24, <=32 bytes */
/* Flag values identifying particularly simple cases, which are */
/* handled specially. We treat functions as simple if they take all */
/* arguments can be passed as 32 or 64 bit integer quantities, there is */
/* either no return value or it can be treated as a 64bit integer, and */
/* if there are at most 2 arguments. */
/* This is OR'ed with the normal flag values. */
#define FFI_SIMPLE_V 0x10000 /* () -> X */
#define FFI_SIMPLE_I 0x20000 /* (int) -> X */
#define FFI_SIMPLE_L 0x30000 /* (long) -> X */
#define FFI_SIMPLE_II 0x40000 /* (int,int) -> X */
#define FFI_SIMPLE_IL 0x50000 /* (int,long) -> X */
#define FFI_SIMPLE_LI 0x60000 /* (long,int) -> X */
#define FFI_SIMPLE_LL 0x70000 /* (long,long) -> X */
/* Mask for all of the FFI_SIMPLE bits: */
#define FFI_SIMPLE 0xf0000
/* An easy way to build FFI_SIMPLE flags from FFI_SIMPLE_V: */
#define FFI_ADD_LONG_ARG(flag) (((flag) << 1) | 0x10000)
#define FFI_ADD_INT_ARG(flag) ((flag) << 1)

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libffi/ia64/unix.S Normal file
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/* -----------------------------------------------------------------------
unix.S - Copyright (c) 1998 Cygnus Solutions
Copyright (c) 2000 Hewlett Packard Company
IA64/unix Foreign Function Interface
Primary author: Hans Boehm, HP Labs
Loosely modeled on Cygnus code for other platforms.
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>
#include "ia64_flags.h"
/* parameters: */
#define callback in0
#define ecifp in1
#define bytes in2
#define flags in3
#define raddr in4
#define fn in5
#define FLOAT_SZ 8 /* in-memory size of fp operands */
.text
.align 16
.global ffi_call_unix#
.proc ffi_call_unix#
ffi_call_unix:
alloc loc0=ar.pfs,6,5,8,0
mov loc1=b0;
sub sp=sp,bytes
mov loc4=r1 /* Save gp */
ld8 r8=[callback],8 /* code address of callback */
;;
mov out0=sp
mov out1=ecifp
mov out2=bytes
ld8 r1=[callback] /* Set up gp for callback. Unnecessary? */
mov b6=r8
;;
br.call.sptk.many b0 = b6 /* call ffi_prep_args */
cmp.eq p6,p0=0,r8 /* r8 nonzero ==> need fp regs */
;;
(p6) add loc2=32+8*FLOAT_SZ,sp
(p6) br.cond.dptk.many fp_done
;; /* Quiets warning; needed? */
add loc2=32,sp
add loc3=32+FLOAT_SZ,sp
;;
ldfd f8=[loc2],2*FLOAT_SZ
ldfd f9=[loc3],2*FLOAT_SZ
;;
ldfd f10=[loc2],2*FLOAT_SZ
ldfd f11=[loc3],2*FLOAT_SZ
;;
ldfd f12=[loc2],2*FLOAT_SZ
ldfd f13=[loc3],2*FLOAT_SZ
;;
ldfd f14=[loc2],2*FLOAT_SZ
ldfd f15=[loc3]
fp_done:
add r9=16,sp /* Pointer to r8_contents */
/* loc2 points at first integer register value. */
add loc3=8,loc2
;;
ld8 r8=[r9] /* Just in case we return large struct */
ld8 out0=[loc2],16
ld8 out1=[loc3],16
;;
ld8 out2=[loc2],16
ld8 out3=[loc3],16
;;
ld8 out4=[loc2],16
ld8 out5=[loc3],16
;;
ld8 out6=[loc2],16
ld8 out7=[loc3]
/* loc2 points at first stack parameter. Set sp to 16 bytes */
/* below that. */
add sp=-16,loc2
ld8 r8=[fn],8
;;
ld8 r1=[fn] /* Set up gp */
mov b6=r8;;
br.call.sptk.many b0 = b6 /* call ffi_prep_args */
/* Handle return value. */
cmp.eq p6,p0=0,raddr
cmp.eq p7,p0=FFI_TYPE_INT,flags
cmp.eq p10,p0=FFI_IS_SMALL_STRUCT2,flags
cmp.eq p11,p0=FFI_IS_SMALL_STRUCT3,flags
cmp.eq p12,p0=FFI_IS_SMALL_STRUCT4,flags
;;
(p6) br.cond.dpnt.few done /* Dont copy ret values if raddr = 0 */
(p7) br.cond.dptk.few copy1
(p10) br.cond.dpnt.few copy2
(p11) br.cond.dpnt.few copy3
(p12) br.cond.dpnt.few copy4
cmp.eq p8,p0=FFI_TYPE_FLOAT,flags
cmp.eq p9,p0=FFI_TYPE_DOUBLE,flags
tbit.nz p6,p0=flags,FLOAT_FP_AGGREGATE_BIT
tbit.nz p7,p0=flags,DOUBLE_FP_AGGREGATE_BIT
;;
(p8) stfs [raddr]=f8
(p9) stfd [raddr]=f8
;;
(p6) br.cond.dpnt.few handle_float_hfa
(p7) br.cond.dpnt.few handle_double_hfa
br done
copy4:
add loc3=24,raddr
;;
st8 [loc3]=r11
copy3:
add loc3=16,raddr
;;
st8 [loc3]=r10
copy2:
add loc3=8,raddr
;;
st8 [loc3]=r9
copy1:
st8 [raddr]=r8
/* In the big struct case, raddr was passed as an argument. */
/* In the void case there was nothing to do. */
done:
mov r1=loc4 /* Restore gp */
mov ar.pfs = loc0
mov b0 = loc1
br.ret.sptk.many b0
handle_double_hfa:
/* Homogeneous floating point array of doubles is returned in */
/* registers f8-f15. Save one at a time to return area. */
and flags=0xf,flags /* Retrieve size */
;;
cmp.eq p6,p0=2,flags
cmp.eq p7,p0=3,flags
cmp.eq p8,p0=4,flags
cmp.eq p9,p0=5,flags
cmp.eq p10,p0=6,flags
cmp.eq p11,p0=7,flags
cmp.eq p12,p0=8,flags
;;
(p6) br.cond.dptk.few dhfa2
(p7) br.cond.dptk.few dhfa3
(p8) br.cond.dptk.few dhfa4
(p9) br.cond.dptk.few dhfa5
(p10) br.cond.dptk.few dhfa6
(p11) br.cond.dptk.few dhfa7
dhfa8: add loc3=7*8,raddr
;;
stfd [loc3]=f15
dhfa7: add loc3=6*8,raddr
;;
stfd [loc3]=f14
dhfa6: add loc3=5*8,raddr
;;
stfd [loc3]=f13
dhfa5: add loc3=4*8,raddr
;;
stfd [loc3]=f12
dhfa4: add loc3=3*8,raddr
;;
stfd [loc3]=f11
dhfa3: add loc3=2*8,raddr
;;
stfd [loc3]=f10
dhfa2: add loc3=1*8,raddr
;;
stfd [loc3]=f9
stfd [raddr]=f8
br done
handle_float_hfa:
/* Homogeneous floating point array of floats is returned in */
/* registers f8-f15. Save one at a time to return area. */
and flags=0xf,flags /* Retrieve size */
;;
cmp.eq p6,p0=2,flags
cmp.eq p7,p0=3,flags
cmp.eq p8,p0=4,flags
cmp.eq p9,p0=5,flags
cmp.eq p10,p0=6,flags
cmp.eq p11,p0=7,flags
cmp.eq p12,p0=8,flags
;;
(p6) br.cond.dptk.few shfa2
(p7) br.cond.dptk.few shfa3
(p8) br.cond.dptk.few shfa4
(p9) br.cond.dptk.few shfa5
(p10) br.cond.dptk.few shfa6
(p11) br.cond.dptk.few shfa7
shfa8: add loc3=7*4,raddr
;;
stfd [loc3]=f15
shfa7: add loc3=6*4,raddr
;;
stfd [loc3]=f14
shfa6: add loc3=5*4,raddr
;;
stfd [loc3]=f13
shfa5: add loc3=4*4,raddr
;;
stfd [loc3]=f12
shfa4: add loc3=3*4,raddr
;;
stfd [loc3]=f11
shfa3: add loc3=2*4,raddr
;;
stfd [loc3]=f10
shfa2: add loc3=1*4,raddr
;;
stfd [loc3]=f9
stfd [raddr]=f8
br done
.endp ffi_call_unix
.text
.align 16
.global ffi_closure_UNIX
.proc ffi_closure_UNIX
ffi_closure_UNIX:
alloc loc0=ar.pfs,8,2,2,0
mov loc1=b0
/* Retrieve closure pointer and real gp. */
mov out0=gp
add gp=16,gp
;;
ld8 gp=[gp]
/* Reserve a structia64_args on the stack such that arguments */
/* past the first 8 are automatically placed in the right */
/* slot. Note that when we start the sp points at 2 8-byte */
/* scratch words, followed by the extra arguments. */
# define BASIC_ARGS_SZ (8*FLOAT_SZ+8*8+2*8)
# define FIRST_FP_OFFSET (4*8)
add r14=-(BASIC_ARGS_SZ-FIRST_FP_OFFSET),sp
add r15=-(BASIC_ARGS_SZ-FIRST_FP_OFFSET-FLOAT_SZ),sp
add sp=-BASIC_ARGS_SZ,sp
/* r14 points to fp_regs[0], r15 points to fp_regs[1] */
;;
stfd [r14]=f8,2*FLOAT_SZ
stfd [r15]=f9,2*FLOAT_SZ
;;
stfd [r14]=f10,2*FLOAT_SZ
stfd [r15]=f11,2*FLOAT_SZ
;;
stfd [r14]=f12,2*FLOAT_SZ
stfd [r15]=f13,2*FLOAT_SZ
;;
stfd [r14]=f14,FLOAT_SZ+8
stfd [r15]=f15,2*8
;;
/* r14 points to first parameter register area, r15 to second. */
st8 [r14]=in0,2*8
st8 [r15]=in1,2*8
;;
st8 [r14]=in2,2*8
st8 [r15]=in3,2*8
;;
st8 [r14]=in4,2*8
st8 [r15]=in5,2*8
;;
st8 [r14]=in6,2*8
st8 [r15]=in7,2*8
/* Call ffi_closure_UNIX_inner */
mov out1=sp
br.call.sptk.many b0=ffi_closure_UNIX_inner
;;
mov b0=loc1
mov ar.pfs=loc0
br.ret.sptk.many b0
.endp ffi_closure_UNIX