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Diffstat (limited to 'contrib/gcc/ginclude/va-ppc.h')
| -rw-r--r-- | contrib/gcc/ginclude/va-ppc.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/contrib/gcc/ginclude/va-ppc.h b/contrib/gcc/ginclude/va-ppc.h new file mode 100644 index 0000000..09f11e0 --- /dev/null +++ b/contrib/gcc/ginclude/va-ppc.h @@ -0,0 +1,144 @@ +/* GNU C varargs support for the PowerPC with V.4 calling sequence */ + +/* Define __gnuc_va_list. */ + +#ifndef __GNUC_VA_LIST +#define __GNUC_VA_LIST + +/* Note that the names in this structure are in the user's namespace, but + that the V.4 abi explicitly states that these names should be used. */ +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 */ + +/* Calling __builtin_next_arg gives the proper error message if LASTARG is + not indeed the last argument. */ +#define va_start(AP,LASTARG) \ + (__builtin_next_arg (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_float_p (TYPE) && !__va_aggregate_p (TYPE) \ + && (AP)->gpr < 8) \ + { \ + (AP)->gpr = 8; \ + __ptr = (TYPE *) (void *) ((AP)->overflow_arg_area); \ + (AP)->overflow_arg_area += __va_size (TYPE) * sizeof (long); \ + } \ + \ + 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) */ |
