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Patch: IA-64 support for libffi
- To: Java Patch List <java-patches at sourceware dot cygnus dot com>
- Subject: Patch: IA-64 support for libffi
- From: Tom Tromey <tromey at cygnus dot com>
- Date: 25 Feb 2000 12:17:52 -0700
- Reply-To: tromey at cygnus dot com
I'm checking in the appended patch. This adds IA-64 support to
libffi. This is the first step in porting libgcj to the IA-64. Many
thanks to Hans Boehm for this work.
2000-02-25 Hans Boehm <boehm@acm.org>
* src/ia64/ffi.c, src/ia64/ia64_flags.h, src/ia64/unix.S: New
files.
* src/raw_api.c (ffi_translate_args): Fixed typo in argument
list.
(ffi_prep_raw_closure): Use ffi_translate_args, not
ffi_closure_translate.
* src/java_raw_api.c: New file.
* src/ffitest.c (closure_test_fn): New function.
(main): Define `rint' as long long on IA64. Added new test when
FFI_CLOSURES is defined.
* include/ffi.h.in (ALIGN): Use size_t, not unsigned.
(ffi_abi): Recognize IA64.
(ffi_raw): Added `flt' field.
Added "Java raw API" code.
* configure.in: Recognize ia64.
* Makefile.am (TARGET_SRC_IA64): New macro.
(libffi_la_common_SOURCES): Added java_raw_api.c.
(libffi_la_SOURCES): Define in IA64 case.
Tom
Index: Makefile.am
===================================================================
RCS file: /cvs/java/libgcj/libffi/Makefile.am,v
retrieving revision 1.4
diff -u -r1.4 Makefile.am
--- Makefile.am 1999/12/31 22:44:09 1.4
+++ Makefile.am 2000/02/25 19:02:23
@@ -42,13 +42,15 @@
TARGET_SRC_X86 = src/x86/ffi.c src/x86/sysv.S
TARGET_SRC_SPARC = src/sparc/ffi.c src/sparc/v8.S
TARGET_SRC_ALPHA = src/alpha/ffi.c src/alpha/osf.S
+TARGET_SRC_IA64 = src/alpha/ffi.c src/alpha/unix.S
TARGET_SRC_M68K = src/m68k/ffi.c src/m68k/sysv.S
TARGET_SRC_POWERPC = src/powerpc/ffi.c src/powerpc/sysv.S
TARGET_SRC_ARM = src/arm/sysv.S src/arm/ffi.c
##libffi_la_SOURCES = src/debug.c src/prep_cif.c src/types.c $(TARGET_SRC_@TARGET@)
## Work around automake deficiency
-libffi_la_common_SOURCES = src/debug.c src/prep_cif.c src/types.c src/raw_api.c
+libffi_la_common_SOURCES = src/debug.c src/prep_cif.c src/types.c \
+ src/raw_api.c src/java_raw_api.c
if MIPS_GCC
libffi_la_SOURCES = $(libffi_la_common_SOURCES) $(TARGET_SRC_MIPS_GCC)
endif
@@ -63,6 +65,9 @@
endif
if ALPHA
libffi_la_SOURCES = $(libffi_la_common_SOURCES) $(TARGET_SRC_ALPHA)
+endif
+if IA64
+libffi_la_SOURCES = $(libffi_la_common_SOURCES) $(TARGET_SRC_IA64)
endif
if M68K
libffi_la_SOURCES = $(libffi_la_common_SOURCES) $(TARGET_SRC_M68K)
Index: configure.in
===================================================================
RCS file: /cvs/java/libgcj/libffi/configure.in,v
retrieving revision 1.3
diff -u -r1.3 configure.in
--- configure.in 1999/09/01 23:16:34 1.3
+++ configure.in 2000/02/25 19:02:23
@@ -27,6 +27,7 @@
sparc-sun-4*) TARGET=SPARC; TARGETDIR=sparc;;
sparc-sun-*) TARGET=SPARC; TARGETDIR=sparc;;
alpha*-*-linux* | alpha*-*-osf*) TARGET=ALPHA; TARGETDIR=alpha;;
+ia64*-*-*) TARGET=IA64; TARGETDIR=ia64;;
m68k-*-linux*) TARGET=M68K; TARGETDIR=m68k;;
powerpc-*-linux* | powerpc-*-sysv*) TARGET=POWERPC; TARGETDIR=powerpc;;
powerpc-*-beos*) TARGET=POWERPC; TARGETDIR=powerpc;;
@@ -42,6 +43,7 @@
AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
AM_CONDITIONAL(X86, test x$TARGET = xX86)
AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
+AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
AM_CONDITIONAL(ARM, test x$TARGET = xARM)
Index: include/ffi.h.in
===================================================================
RCS file: /cvs/java/libgcj/libffi/include/ffi.h.in,v
retrieving revision 1.3
diff -u -r1.3 ffi.h.in
--- ffi.h.in 1999/09/01 23:16:34 1.3
+++ ffi.h.in 2000/02/25 19:02:24
@@ -24,6 +24,32 @@
----------------------------------------------------------------------- */
+/* -------------------------------------------------------------------
+ The basic API is described in the README file.
+
+ The raw API is designed to bypass some of the argument packing
+ and unpacking on architectures for which it can be avoided.
+
+ The closure API allows interpreted functions to be packaged up
+ inside a C function pointer, so that they can be called as C functions,
+ with no understanding on the client side that they are interpreted.
+ It can also be used in other cases in which it is necessary to package
+ up a user specified parameter and a function pointer as a single
+ function pointer.
+
+ The closure API must be implemented in order to get its functionality,
+ e.g. for use by gij. Routines are provided to emulate the raw API
+ if the underlying platform doesn't allow faster implementation.
+
+ More details on the raw and cloure API can be found in:
+
+ http://sourceware.cygnus.com/ml/java-discuss/1999-q3/msg00138.html
+
+ and
+
+ http://sourceware.cygnus.com/ml/java-discuss/1999-q3/msg00174.html
+ -------------------------------------------------------------------- */
+
#ifndef LIBFFI_H
#define LIBFFI_H
@@ -138,7 +164,9 @@
/* ---- Generic type definitions ----------------------------------------- */
-#define ALIGN(v, a) (((((unsigned) (v))-1) | ((a)-1))+1)
+#define ALIGN(v, a) (((((size_t) (v))-1) | ((a)-1))+1)
+/* The closure code assumes that this works on pointers, i.e. a size_t */
+/* can hold a pointer. */
typedef enum ffi_abi {
@@ -159,6 +187,12 @@
FFI_DEFAULT_ABI = FFI_SYSV,
#endif
+ /* ---- Intel ia64 ---------------- */
+#ifdef IA64
+ FFI_UNIX, /* Linux and all Unix variants use the same conventions */
+ FFI_DEFAULT_ABI = FFI_UNIX,
+#endif
+
/* ---- Mips --------------------- */
#ifdef MIPS
FFI_O32,
@@ -268,6 +302,7 @@
typedef union {
SINT_ARG sint;
UINT_ARG uint;
+ float flt;
char data[SIZEOF_ARG];
void* ptr;
} ffi_raw;
@@ -281,8 +316,22 @@
void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
size_t ffi_raw_size (ffi_cif *cif);
+#if !NO_JAVA_RAW_API
+/* This is analogous to the raw API, except it uses Java parameter */
+/* packing, even on 64-bit machines. I.e. on 64-bit machines */
+/* longs and doubles are followed by an empty 64-bit word. */
+
+void ffi_java_raw_call (/*@dependent@*/ ffi_cif *cif,
+ void (*fn)(),
+ /*@out@*/ void *rvalue,
+ /*@dependent@*/ ffi_raw *avalue);
+
+void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
+void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
+size_t ffi_java_raw_size (ffi_cif *cif);
+#endif /* !NO_JAVA_RAW_API */
#endif /* !FFI_NO_RAW_API */
@@ -294,6 +343,21 @@
#define FFI_TRAMPOLINE_SIZE 10
#define FFI_NATIVE_RAW_API 1 /* and has native raw api support */
+#elif defined(IA64)
+
+#define FFI_CLOSURES 1
+#define FFI_TRAMPOLINE_SIZE 24 /* Really the following struct, which */
+ /* can be interpreted as a C function */
+ /* decriptor: */
+
+struct ffi_ia64_trampoline_struct {
+ void * code_pointer; /* Pointer to ffi_closure_UNIX */
+ void * fake_gp; /* Pointer to closure, installed as gp */
+ void * real_gp; /* Real gp value, reinstalled by */
+ /* ffi_closure_UNIX. */
+};
+#define FFI_NATIVE_RAW_API 0
+
#else
#define FFI_CLOSURES 0
@@ -346,6 +410,14 @@
ffi_cif *cif,
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
void *user_data);
+
+#ifndef NO_JAVA_RAW_API
+ffi_status
+ffi_prep_java_raw_closure (ffi_raw_closure*,
+ ffi_cif *cif,
+ void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
+ void *user_data);
+#endif
#endif /* !FFI_NO_RAW_API */
#endif /* FFI_CLOSURES */
Index: src/ffitest.c
===================================================================
RCS file: /cvs/java/libgcj/libffi/src/ffitest.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 ffitest.c
--- ffitest.c 1999/08/08 13:27:19 1.1.1.1
+++ ffitest.c 2000/02/25 19:02:25
@@ -196,6 +196,16 @@
return ts1;
}
+/* Take an int and a float argument, together with int userdata, and */
+/* return the sum. */
+static void closure_test_fn(ffi_cif* cif,void* resp,void** args, void* userdata)
+{
+ *(int*)resp =
+ *(int *)args[0] + (int)(*(float *)args[1]) + (int)(long)userdata;
+}
+
+typedef int (*closure_test_type)(int, float);
+
int main(/*@unused@*/ int argc, /*@unused@*/ char *argv[])
{
ffi_cif cif;
@@ -214,7 +224,7 @@
signed int si1;
signed int si2;
-#if defined(ALPHA) || (defined(MIPS) && (_MIPS_SIM == _ABIN32))
+#if defined(ALPHA) || defined(IA64) || (defined(MIPS) && (_MIPS_SIM == _ABIN32))
long long rint;
#else
int rint;
@@ -690,6 +700,27 @@
free (ts5_result);
}
+
+# if FFI_CLOSURES
+ /* A simple closure test */
+ {
+ ffi_closure cl;
+ ffi_type * cl_arg_types[3];
+
+ cl_arg_types[0] = &ffi_type_sint;
+ cl_arg_types[1] = &ffi_type_float;
+ cl_arg_types[2] = NULL;
+
+ /* Initialize the cif */
+ CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 2,
+ &ffi_type_sint, cl_arg_types) == FFI_OK);
+
+ CHECK(ffi_prep_closure(&cl, &cif, closure_test_fn,
+ (void *) 3 /* userdata */)
+ == FFI_OK);
+ CHECK((*((closure_test_type)(&cl)))(1, 2.0) == 6);
+ }
+# endif
/* If we arrived here, all is good */
(void) puts("\nLooks good. No surprises.\n");
Index: src/java_raw_api.c
===================================================================
RCS file: java_raw_api.c
diff -N java_raw_api.c
--- /dev/null Tue May 5 13:32:27 1998
+++ java_raw_api.c Fri Feb 25 11:02:26 2000
@@ -0,0 +1,271 @@
+/* -----------------------------------------------------------------------
+ java_raw_api.c - Copyright (c) 1999 Cygnus Solutions
+
+ Cloned from raw_api.c
+
+ Raw_api.c author: Kresten Krab Thorup <krab@gnu.org>
+ Java_raw_api.c author: Hans-J. Boehm <hboehm@hpl.hp.com>
+
+ $Id $
+
+ 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.
+ ----------------------------------------------------------------------- */
+
+/* This defines a Java- and 64-bit specific variant of the raw API. */
+/* It assumes that "raw" argument blocks look like Java stacks on a */
+/* 64-bit machine. Arguments that can be stored in a single stack */
+/* stack slots (longs, doubles) occupy 128 bits, but only the first */
+/* 64 bits are actually used. */
+
+#include <ffi.h>
+#include <ffi_common.h>
+
+#if !defined(NO_JAVA_RAW_API) && !defined(FFI_NO_RAW_API)
+
+size_t
+ffi_java_raw_size (ffi_cif *cif)
+{
+ size_t result = 0;
+ int i;
+
+ ffi_type **at = cif->arg_types;
+
+ for (i = cif->nargs-1; i >= 0; i--, at++)
+ {
+ switch((*at) -> type) {
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ result += 2 * SIZEOF_ARG;
+ break;
+ case FFI_TYPE_STRUCT:
+ /* No structure parameters in Java. */
+ abort();
+ default:
+ result += SIZEOF_ARG;
+ }
+ }
+
+ return result;
+}
+
+
+void
+ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args)
+{
+ unsigned i;
+ ffi_type **tp = cif->arg_types;
+
+#if WORDS_BIGENDIAN
+
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+ switch ((*tp)->type)
+ {
+ case FFI_TYPE_UINT8:
+ case FFI_TYPE_SINT8:
+ *args = (void*) ((char*)(raw++) + SIZEOF_ARG - 1);
+ break;
+
+ case FFI_TYPE_UINT16:
+ case FFI_TYPE_SINT16:
+ *args = (void*) ((char*)(raw++) + SIZEOF_ARG - 2);
+ break;
+
+#if SIZEOF_ARG >= 4
+ case FFI_TYPE_UINT32:
+ case FFI_TYPE_SINT32:
+ *args = (void*) ((char*)(raw++) + SIZEOF_ARG - 4);
+ break;
+#endif
+
+#if SIZEOF_ARG == 8
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ *args = (void *)raw;
+ raw += 2;
+ break;
+#endif
+
+ case FFI_TYPE_POINTER:
+ *args = (void*) &(raw++)->ptr;
+ break;
+
+ default:
+ *args = raw;
+ raw += ALIGN ((*tp)->size, SIZEOF_ARG) / SIZEOF_ARG;
+ }
+ }
+
+#else /* WORDS_BIGENDIAN */
+
+#if !PDP
+
+ /* then assume little endian */
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+#if SIZEOF_ARG == 8
+ switch((*tp)->type) {
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ *args = (void*) raw;
+ raw += 2;
+ break;
+ default:
+ *args = (void*) raw++;
+ }
+#else /* SIZEOF_ARG != 8 */
+ *args = (void*) raw;
+ raw += ALIGN ((*tp)->size, sizeof (void*)) / sizeof (void*);
+#endif /* SIZEOF_ARG == 8 */
+ }
+
+#else
+#error "pdp endian not supported"
+#endif /* ! PDP */
+
+#endif /* WORDS_BIGENDIAN */
+}
+
+void
+ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw)
+{
+ unsigned i;
+ ffi_type **tp = cif->arg_types;
+
+ for (i = 0; i < cif->nargs; i++, tp++, args++)
+ {
+ switch ((*tp)->type)
+ {
+ case FFI_TYPE_UINT8:
+ (raw++)->uint = *(UINT8*) (*args);
+ break;
+
+ case FFI_TYPE_SINT8:
+ (raw++)->sint = *(SINT8*) (*args);
+ break;
+
+ case FFI_TYPE_UINT16:
+ (raw++)->uint = *(UINT16*) (*args);
+ break;
+
+ case FFI_TYPE_SINT16:
+ (raw++)->sint = *(SINT16*) (*args);
+ break;
+
+#if SIZEOF_ARG >= 4
+ case FFI_TYPE_UINT32:
+ (raw++)->uint = *(UINT32*) (*args);
+ break;
+
+ case FFI_TYPE_SINT32:
+ (raw++)->sint = *(SINT32*) (*args);
+ break;
+#endif
+ case FFI_TYPE_FLOAT:
+ (raw++)->flt = *(FLOAT32*) (*args);
+ break;
+
+#if SIZEOF_ARG == 8
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_DOUBLE:
+ raw->uint = *(UINT64*) (*args);
+ raw += 2;
+ break;
+#endif
+
+ case FFI_TYPE_POINTER:
+ (raw++)->ptr = **(void***) args;
+ break;
+
+ default:
+#if SIZEOF_ARG == 8
+ FFI_ASSERT(FALSE); /* Should have covered all cases */
+#else
+ memcpy ((void*) raw->data, (void*)*args, (*tp)->size);
+ raw += ALIGN ((*tp)->size, SIZEOF_ARG) / SIZEOF_ARG;
+#endif
+ }
+ }
+}
+
+#if !FFI_NATIVE_RAW_API
+
+
+/* This is a generic definition of ffi_raw_call, to be used if the
+ * native system does not provide a machine-specific implementation.
+ * Having this, allows code to be written for the raw API, without
+ * the need for system-specific code to handle input in that format;
+ * these following couple of functions will handle the translation forth
+ * and back automatically. */
+
+void ffi_java_raw_call (/*@dependent@*/ ffi_cif *cif,
+ void (*fn)(),
+ /*@out@*/ void *rvalue,
+ /*@dependent@*/ ffi_raw *raw)
+{
+ void **avalue = (void**) alloca (cif->nargs * sizeof (void*));
+ ffi_java_raw_to_ptrarray (cif, raw, avalue);
+ ffi_call (cif, fn, rvalue, avalue);
+}
+
+#if FFI_CLOSURES /* base system provides closures */
+
+static void
+ffi_java_translate_args (ffi_cif *cif, void *rvalue,
+ void **avalue, void *user_data)
+{
+ ffi_raw *raw = (ffi_raw*)alloca (ffi_java_raw_size (cif));
+ ffi_raw_closure *cl = (ffi_raw_closure*)user_data;
+
+ ffi_java_ptrarray_to_raw (cif, avalue, raw);
+ (*cl->fun) (cif, rvalue, raw, cl->user_data);
+}
+
+/* Again, here is the generic version of ffi_prep_raw_closure, which
+ * will install an intermediate "hub" for translation of arguments from
+ * the pointer-array format, to the raw format */
+
+ffi_status
+ffi_prep_java_raw_closure (ffi_raw_closure* cl,
+ ffi_cif *cif,
+ void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
+ void *user_data)
+{
+ ffi_status status;
+
+ status = ffi_prep_closure ((ffi_closure*) cl,
+ cif,
+ &ffi_java_translate_args,
+ (void*)cl);
+ if (status == FFI_OK)
+ {
+ cl->fun = fun;
+ cl->user_data = user_data;
+ }
+
+ return status;
+}
+
+#endif /* FFI_CLOSURES */
+#endif /* !FFI_NATIVE_RAW_API */
+#endif /* !FFI_NO_RAW_API */
Index: src/raw_api.c
===================================================================
RCS file: /cvs/java/libgcj/libffi/src/raw_api.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 raw_api.c
--- raw_api.c 1999/08/08 13:27:19 1.1.1.1
+++ raw_api.c 2000/02/25 19:02:26
@@ -202,13 +202,13 @@
#if FFI_CLOSURES /* base system provides closures */
static void
-ffi_translate_args (ffi_cif *cif, void *ravlue,
+ffi_translate_args (ffi_cif *cif, void *rvalue,
void **avalue, void *user_data)
{
ffi_raw *raw = (ffi_raw*)alloca (ffi_raw_size (cif));
- ffi_ptrarray_to_raw (cif, avalue, raw);
-
ffi_raw_closure *cl = (ffi_raw_closure*)user_data;
+
+ ffi_ptrarray_to_raw (cif, avalue, raw);
(*cl->fun) (cif, rvalue, raw, cl->user_data);
}
@@ -226,7 +226,7 @@
status = ffi_prep_closure ((ffi_closure*) cl,
cif,
- &ffi_closure_translate,
+ &ffi_translate_args,
(void*)cl);
if (status == FFI_OK)
{
Index: src/ia64/ffi.c
===================================================================
RCS file: ffi.c
diff -N ffi.c
--- /dev/null Tue May 5 13:32:27 1998
+++ ffi.c Fri Feb 25 11:02:28 2000
@@ -0,0 +1,670 @@
+/* -----------------------------------------------------------------------
+ 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;
+}
+
+
Index: src/ia64/ia64_flags.h
===================================================================
RCS file: ia64_flags.h
diff -N ia64_flags.h
--- /dev/null Tue May 5 13:32:27 1998
+++ ia64_flags.h Fri Feb 25 11:02:28 2000
@@ -0,0 +1,62 @@
+/* -----------------------------------------------------------------------
+ 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)
Index: src/ia64/unix.S
===================================================================
RCS file: unix.S
diff -N unix.S
--- /dev/null Tue May 5 13:32:27 1998
+++ unix.S Fri Feb 25 11:02:28 2000
@@ -0,0 +1,301 @@
+/* -----------------------------------------------------------------------
+ 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
+
+