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Rebase

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This commit is contained in:
Anthony Green
2010-11-21 10:50:56 -05:00
parent 84e8de6e9f
commit 2db72615b5
384 changed files with 22979 additions and 168722 deletions
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231
src/arm/ffi.c
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@@ -29,12 +29,20 @@
#include <stdlib.h>
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments */
/* Forward declares. */
static int vfp_type_p (ffi_type *);
static void layout_vfp_args (ffi_cif *);
void ffi_prep_args(char *stack, extended_cif *ecif)
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments
The vfp_space parameter is the load area for VFP regs, the return
value is cif->vfp_used (word bitset of VFP regs used for passing
arguments). These are only used for the VFP hard-float ABI.
*/
int ffi_prep_args(char *stack, extended_cif *ecif, float *vfp_space)
{
register unsigned int i;
register unsigned int i, vi = 0;
register void **p_argv;
register char *argp;
register ffi_type **p_arg;
@@ -54,6 +62,21 @@ void ffi_prep_args(char *stack, extended_cif *ecif)
{
size_t z;
/* Allocated in VFP registers. */
if (ecif->cif->abi == FFI_VFP
&& vi < ecif->cif->vfp_nargs && vfp_type_p (*p_arg))
{
float* vfp_slot = vfp_space + ecif->cif->vfp_args[vi++];
if ((*p_arg)->type == FFI_TYPE_FLOAT)
*((float*)vfp_slot) = *((float*)*p_argv);
else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
*((double*)vfp_slot) = *((double*)*p_argv);
else
memcpy(vfp_slot, *p_argv, (*p_arg)->size);
p_argv++;
continue;
}
/* Align if necessary */
if (((*p_arg)->alignment - 1) & (unsigned) argp) {
argp = (char *) ALIGN(argp, (*p_arg)->alignment);
@@ -103,13 +126,15 @@ void ffi_prep_args(char *stack, extended_cif *ecif)
p_argv++;
argp += z;
}
return;
/* Indicate the VFP registers used. */
return ecif->cif->vfp_used;
}
/* Perform machine dependent cif processing */
ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
int type_code;
/* Round the stack up to a multiple of 8 bytes. This isn't needed
everywhere, but it is on some platforms, and it doesn't harm anything
when it isn't needed. */
@@ -130,7 +155,14 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
break;
case FFI_TYPE_STRUCT:
if (cif->rtype->size <= 4)
if (cif->abi == FFI_VFP
&& (type_code = vfp_type_p (cif->rtype)) != 0)
{
/* A Composite Type passed in VFP registers, either
FFI_TYPE_STRUCT_VFP_FLOAT or FFI_TYPE_STRUCT_VFP_DOUBLE. */
cif->flags = (unsigned) type_code;
}
else if (cif->rtype->size <= 4)
/* A Composite Type not larger than 4 bytes is returned in r0. */
cif->flags = (unsigned)FFI_TYPE_INT;
else
@@ -145,11 +177,18 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
break;
}
/* Map out the register placements of VFP register args.
The VFP hard-float calling conventions are slightly more sophisticated than
the base calling conventions, so we do it here instead of in ffi_prep_args(). */
if (cif->abi == FFI_VFP)
layout_vfp_args (cif);
return FFI_OK;
}
extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
unsigned, unsigned, unsigned *, void (*fn)(void));
/* Prototypes for assembly functions, in sysv.S */
extern void ffi_call_SYSV (void (*fn)(void), extended_cif *, unsigned, unsigned, unsigned *);
extern void ffi_call_VFP (void (*fn)(void), extended_cif *, unsigned, unsigned, unsigned *);
void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
@@ -157,6 +196,8 @@ void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
int small_struct = (cif->flags == FFI_TYPE_INT
&& cif->rtype->type == FFI_TYPE_STRUCT);
int vfp_struct = (cif->flags == FFI_TYPE_STRUCT_VFP_FLOAT
|| cif->flags == FFI_TYPE_STRUCT_VFP_DOUBLE);
ecif.cif = cif;
ecif.avalue = avalue;
@@ -173,38 +214,51 @@ void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
}
else if (small_struct)
ecif.rvalue = &temp;
else if (vfp_struct)
{
/* Largest case is double x 4. */
ecif.rvalue = alloca(32);
}
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
case FFI_SYSV:
ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, cif->flags, ecif.rvalue,
fn);
ffi_call_SYSV (fn, &ecif, cif->bytes, cif->flags, ecif.rvalue);
break;
case FFI_VFP:
ffi_call_VFP (fn, &ecif, cif->bytes, cif->flags, ecif.rvalue);
break;
default:
FFI_ASSERT(0);
break;
}
if (small_struct)
memcpy (rvalue, &temp, cif->rtype->size);
else if (vfp_struct)
memcpy (rvalue, ecif.rvalue, cif->rtype->size);
}
/** private members **/
static void ffi_prep_incoming_args_SYSV (char *stack, void **ret,
void** args, ffi_cif* cif);
void** args, ffi_cif* cif, float *vfp_stack);
void ffi_closure_SYSV (ffi_closure *);
void ffi_closure_VFP (ffi_closure *);
/* This function is jumped to by the trampoline */
unsigned int
ffi_closure_SYSV_inner (closure, respp, args)
ffi_closure_SYSV_inner (closure, respp, args, vfp_args)
ffi_closure *closure;
void **respp;
void *args;
void *vfp_args;
{
// our various things...
ffi_cif *cif;
@@ -219,7 +273,7 @@ ffi_closure_SYSV_inner (closure, respp, args)
* a structure, it will re-set RESP to point to the
* structure return address. */
ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif);
ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif, vfp_args);
(closure->fun) (cif, *respp, arg_area, closure->user_data);
@@ -229,10 +283,12 @@ ffi_closure_SYSV_inner (closure, respp, args)
/*@-exportheader@*/
static void
ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
void **avalue, ffi_cif *cif)
void **avalue, ffi_cif *cif,
/* Used only under VFP hard-float ABI. */
float *vfp_stack)
/*@=exportheader@*/
{
register unsigned int i;
register unsigned int i, vi = 0;
register void **p_argv;
register char *argp;
register ffi_type **p_arg;
@@ -249,8 +305,16 @@ ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
for (i = cif->nargs, p_arg = cif->arg_types; (i != 0); i--, p_arg++)
{
size_t z;
size_t alignment;
if (cif->abi == FFI_VFP
&& vi < cif->vfp_nargs && vfp_type_p (*p_arg))
{
*p_argv++ = (void*)(vfp_stack + cif->vfp_args[vi++]);
continue;
}
size_t alignment = (*p_arg)->alignment;
alignment = (*p_arg)->alignment;
if (alignment < 4)
alignment = 4;
/* Align if necessary */
@@ -295,10 +359,17 @@ ffi_prep_closure_loc (ffi_closure* closure,
void *user_data,
void *codeloc)
{
FFI_ASSERT (cif->abi == FFI_SYSV);
void (*closure_func)(ffi_closure*) = NULL;
if (cif->abi == FFI_SYSV)
closure_func = &ffi_closure_SYSV;
else if (cif->abi == FFI_VFP)
closure_func = &ffi_closure_VFP;
else
FFI_ASSERT (0);
FFI_INIT_TRAMPOLINE (&closure->tramp[0], \
&ffi_closure_SYSV, \
closure_func, \
codeloc);
closure->cif = cif;
@@ -307,3 +378,123 @@ ffi_prep_closure_loc (ffi_closure* closure,
return FFI_OK;
}
/* Below are routines for VFP hard-float support. */
static int rec_vfp_type_p (ffi_type *t, int *elt, int *elnum)
{
switch (t->type)
{
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
*elt = (int) t->type;
*elnum = 1;
return 1;
case FFI_TYPE_STRUCT_VFP_FLOAT:
*elt = FFI_TYPE_FLOAT;
*elnum = t->size / sizeof (float);
return 1;
case FFI_TYPE_STRUCT_VFP_DOUBLE:
*elt = FFI_TYPE_DOUBLE;
*elnum = t->size / sizeof (double);
return 1;
case FFI_TYPE_STRUCT:;
{
int base_elt = 0, total_elnum = 0;
ffi_type **el = t->elements;
while (*el)
{
int el_elt = 0, el_elnum = 0;
if (! rec_vfp_type_p (*el, &el_elt, &el_elnum)
|| (base_elt && base_elt != el_elt)
|| total_elnum + el_elnum > 4)
return 0;
base_elt = el_elt;
total_elnum += el_elnum;
el++;
}
*elnum = total_elnum;
*elt = base_elt;
return 1;
}
default: ;
}
return 0;
}
static int vfp_type_p (ffi_type *t)
{
int elt, elnum;
if (rec_vfp_type_p (t, &elt, &elnum))
{
if (t->type == FFI_TYPE_STRUCT)
{
if (elnum == 1)
t->type = elt;
else
t->type = (elt == FFI_TYPE_FLOAT
? FFI_TYPE_STRUCT_VFP_FLOAT
: FFI_TYPE_STRUCT_VFP_DOUBLE);
}
return (int) t->type;
}
return 0;
}
static void place_vfp_arg (ffi_cif *cif, ffi_type *t)
{
int reg = cif->vfp_reg_free;
int nregs = t->size / sizeof (float);
int align = ((t->type == FFI_TYPE_STRUCT_VFP_FLOAT
|| t->type == FFI_TYPE_FLOAT) ? 1 : 2);
/* Align register number. */
if ((reg & 1) && align == 2)
reg++;
while (reg + nregs <= 16)
{
int s, new_used = 0;
for (s = reg; s < reg + nregs; s++)
{
new_used |= (1 << s);
if (cif->vfp_used & (1 << s))
{
reg += align;
goto next_reg;
}
}
/* Found regs to allocate. */
cif->vfp_used |= new_used;
cif->vfp_args[cif->vfp_nargs++] = reg;
/* Update vfp_reg_free. */
if (cif->vfp_used & (1 << cif->vfp_reg_free))
{
reg += nregs;
while (cif->vfp_used & (1 << reg))
reg += 1;
cif->vfp_reg_free = reg;
}
return;
next_reg: ;
}
}
static void layout_vfp_args (ffi_cif *cif)
{
int i;
/* Init VFP fields */
cif->vfp_used = 0;
cif->vfp_nargs = 0;
cif->vfp_reg_free = 0;
memset (cif->vfp_args, -1, 16); /* Init to -1. */
for (i = 0; i < cif->nargs; i++)
{
ffi_type *t = cif->arg_types[i];
if (vfp_type_p (t))
place_vfp_arg (cif, t);
}
}