diff options
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index be5543b..24c92e2 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -1044,6 +1044,14 @@ are zero or sign extended depending on if it is @code{GET_MODE_ALIGNMENT (info->limb_mode)}. @end deftypefn +@deftypefn {Target Hook} machine_mode TARGET_C_MODE_FOR_FLOATING_TYPE (enum tree_index @var{ti}) +Return machine mode for a C floating point type which is indicated by + a given @code{enum tree_index} @var{ti}, @var{ti} should be + @code{TI_FLOAT_TYPE}, @code{TI_DOUBLE_TYPE} or @code{TI_LONG_DOUBLE_TYPE}. + The default implementation returns @code{SFmode} for @code{TI_FLOAT_TYPE}, + and @code{DFmode} for @code{TI_DOUBLE_TYPE} or @code{TI_LONG_DOUBLE_TYPE}. +@end deftypefn + @deftypefn {Target Hook} machine_mode TARGET_PROMOTE_FUNCTION_MODE (const_tree @var{type}, machine_mode @var{mode}, int *@var{punsignedp}, const_tree @var{funtype}, int @var{for_return}) Like @code{PROMOTE_MODE}, but it is applied to outgoing function arguments or function return values. The target hook should return the new mode @@ -1610,23 +1618,6 @@ C99 type @code{_Bool} on the target machine. If you don't define this, and you probably shouldn't, the default is @code{CHAR_TYPE_SIZE}. @end defmac -@defmac FLOAT_TYPE_SIZE -A C expression for the size in bits of the type @code{float} on the -target machine. If you don't define this, the default is one word. -@end defmac - -@defmac DOUBLE_TYPE_SIZE -A C expression for the size in bits of the type @code{double} on the -target machine. If you don't define this, the default is two -words. -@end defmac - -@defmac LONG_DOUBLE_TYPE_SIZE -A C expression for the size in bits of the type @code{long double} on -the target machine. If you don't define this, the default is two -words. -@end defmac - @defmac SHORT_FRACT_TYPE_SIZE A C expression for the size in bits of the type @code{short _Fract} on the target machine. If you don't define this, the default is @@ -1687,9 +1678,11 @@ the libgcc @file{config.host}. @defmac WIDEST_HARDWARE_FP_SIZE A C expression for the size in bits of the widest floating-point format supported by the hardware. If you define this macro, you must specify a -value less than or equal to the value of @code{LONG_DOUBLE_TYPE_SIZE}. -If you do not define this macro, the value of @code{LONG_DOUBLE_TYPE_SIZE} -is the default. +value less than or equal to mode precision of the mode used for C type +@code{long double} (from hook @code{targetm.c.mode_for_floating_type} +with argument @code{TI_LONG_DOUBLE_TYPE}). If you do not define this +macro, mode precision of the mode used for C type @code{long double} is +the default. @end defmac @defmac DEFAULT_SIGNED_CHAR |