Initial revision

From-SVN: r10214

gcc/ginclude/va-ppc.h

+/* GNU C varargs support for the PowerPC with V.4 calling sequence */
+
+/* Define __gnuc_va_list.  */
+
+#ifndef __GNUC_VA_LIST
+#define __GNUC_VA_LIST
+
+typedef struct {
+  char gpr;			/* index into the array of 8 GPRs stored in the
+				   register save area gpr=0 corresponds to r3,
+				   gpr=1 to r4, etc. */
+  char fpr;			/* index into the array of 8 FPRs stored in the
+				   register save area fpr=0 corresponds to f1,
+				   fpr=1 to f2, etc. */
+  char *overflow_arg_area;	/* location on stack that holds the next
+				   overflow argument */
+  char *reg_save_area;		/* where r3:r10 and f1:f8, if saved are stored */
+} __gnuc_va_list[1];
+#endif /* not __GNUC_VA_LIST */
+
+/* If this is for internal libc use, don't define anything but
+   __gnuc_va_list.  */
+#if defined (_STDARG_H) || defined (_VARARGS_H)
+
+/* Register save area located below the frame pointer */
+typedef struct {
+  long   __gp_save[8];		/* save area for GP registers */
+  double __fp_save[8];		/* save area for FP registers */
+} __va_regsave_t;
+
+/* Macros to access the register save area */
+/* We cast to void * and then to TYPE * because this avoids
+   a warning about increasing the alignment requirement.  */
+#define __VA_FP_REGSAVE(AP,TYPE)					\
+  ((TYPE *) (void *) (&(((__va_regsave_t *)				\
+			 (AP)->reg_save_area)->__fp_save[(int)(AP)->fpr])))
+
+#define __VA_GP_REGSAVE(AP,TYPE)					\
+  ((TYPE *) (void *) (&(((__va_regsave_t *)				\
+			 (AP)->reg_save_area)->__gp_save[(int)(AP)->gpr])))
+
+/* Common code for va_start for both varargs and stdarg.  This depends
+   on the format of rs6000_args in rs6000.h.  The fields used are:
+
+   #0	WORDS			# words used for GP regs/stack values
+   #1	FREGNO			next available FP register
+   #2	NARGS_PROTOTYPE		# args left in the current prototype
+   #3	ORIG_NARGS		original value of NARGS_PROTOTYPE
+   #4	VARARGS_OFFSET		offset from frame pointer of varargs area */
+
+#define __va_words		__builtin_args_info (0)
+#define __va_fregno		__builtin_args_info (1)
+#define	__va_nargs		__builtin_args_info (2)
+#define __va_orig_nargs		__builtin_args_info (3)
+#define __va_varargs_offset	__builtin_args_info (4)
+
+#define __va_start_common(AP, FAKE)					\
+__extension__ ({							\
+   register int __words = __va_words - FAKE;				\
+									\
+   (AP)->gpr = (__words < 8) ? __words : 8;				\
+   (AP)->fpr = __va_fregno - 33;					\
+   (AP)->reg_save_area = (((char *) __builtin_frame_address (0))	\
+			  + __va_varargs_offset);			\
+   (AP)->overflow_arg_area = ((char *)__builtin_saveregs ()		\
+			      + (((__words >= 8) ? __words - 8 : 0)	\
+				 * sizeof (long)));			\
+   (void)0;								\
+})
+
+#ifdef _STDARG_H /* stdarg.h support */
+
+#define va_start(AP,LASTARG) __va_start_common (AP, 0)
+
+#else /* varargs.h support */
+
+#define va_start(AP) __va_start_common (AP, 1)
+#define va_alist __va_1st_arg
+#define va_dcl register int va_alist; ...
+
+#endif /* _STDARG_H */
+
+#ifdef _SOFT_FLOAT
+#define __va_float_p(TYPE)	0
+#else
+#define __va_float_p(TYPE)	(__builtin_classify_type(*(TYPE *)0) == 8)
+#endif
+
+#define __va_aggregate_p(TYPE)	(__builtin_classify_type(*(TYPE *)0) >= 12)
+#define __va_size(TYPE)		((sizeof(TYPE) + sizeof (long) - 1) / sizeof (long))
+
+#define va_arg(AP,TYPE)							\
+__extension__ ({							\
+  register TYPE *__ptr;							\
+									\
+  if (__va_float_p (TYPE) && (AP)->fpr < 8)				\
+    {									\
+      __ptr = __VA_FP_REGSAVE (AP, TYPE);				\
+      (AP)->fpr++;							\
+    }									\
+									\
+  else if (__va_aggregate_p (TYPE) && (AP)->gpr < 8)			\
+    {									\
+      __ptr = * __VA_GP_REGSAVE (AP, TYPE *);				\
+      (AP)->gpr++;							\
+    }									\
+									\
+  else if (!__va_float_p (TYPE) && !__va_aggregate_p (TYPE)		\
+	   && (AP)->gpr + __va_size(TYPE) <= 8)				\
+    {									\
+      __ptr = __VA_GP_REGSAVE (AP, TYPE);				\
+      (AP)->gpr += __va_size (TYPE);					\
+    }									\
+									\
+  else if (__va_aggregate_p (TYPE))					\
+    {									\
+      __ptr = * (TYPE **) (void *) ((AP)->overflow_arg_area);		\
+      (AP)->overflow_arg_area += sizeof (TYPE *);			\
+    }									\
+  else									\
+    {									\
+      __ptr = (TYPE *) (void *) ((AP)->overflow_arg_area);		\
+      (AP)->overflow_arg_area += __va_size (TYPE) * sizeof (long);	\
+    }									\
+									\
+  *__ptr;								\
+})
+
+#define va_end(AP)	((void)0)
+
+#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */