@@ -331,6 +331,24 @@ enum symbol_visibility
VISIBILITY_INTERNAL
};
+/* enums used by the targetm.excess_precision hook. */
+
+enum flt_eval_method
+{
+ FLT_EVAL_METHOD_UNPREDICTABLE = -1,
+ FLT_EVAL_METHOD_PROMOTE_TO_FLOAT = 0,
+ FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE = 1,
+ FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE = 2,
+ FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 = 16
+};
+
+enum excess_precision_type
+{
+ EXCESS_PRECISION_TYPE_IMPLICIT,
+ EXCESS_PRECISION_TYPE_STANDARD,
+ EXCESS_PRECISION_TYPE_FAST
+};
+
/* Support for user-provided GGC and PCH markers. The first parameter
is a pointer to a pointer, the second a cookie. */
typedef void (*gt_pointer_operator) (void *, void *);
@@ -947,6 +947,10 @@ sign-extend the result to 64 bits. On such machines, set
Do not define this macro if it would never modify @var{m}.
@end defmac
+@deftypefn {Target Hook} {enum flt_eval_method} TARGET_C_EXCESS_PRECISION (enum excess_precision_type @var{type})
+Return a value, with the same meaning as @code{FLT_EVAL_METHOD} C that describes which excess precision should be applied. @var{type} is either @code{EXCESS_PRECISION_TYPE_IMPLICIT}, @code{EXCESS_PRECISION_TYPE_FAST}, or @code{EXCESS_PRECISION_TYPE_STANDARD}. For @code{EXCESS_PRECISION_TYPE_IMPLICIT}, the target should return which precision and range operations will be implictly evaluated in regardless of the excess precision explicitly added. For @code{EXCESS_PRECISION_TYPE_STANDARD} and @code{EXCESS_PRECISION_TYPE_FAST}, the target should return the explicit excess precision that should be added depending on the value set for @option{-fexcess-precision=@r{[}standard@r{|}fast@r{]}}.
+@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
@@ -921,6 +921,8 @@ sign-extend the result to 64 bits. On such machines, set
Do not define this macro if it would never modify @var{m}.
@end defmac
+@hook TARGET_C_EXCESS_PRECISION
+
@hook TARGET_PROMOTE_FUNCTION_MODE
@defmac PARM_BOUNDARY
@@ -5430,6 +5430,23 @@ DEFHOOK_UNDOC
machine_mode, (char c),
default_mode_for_suffix)
+DEFHOOK
+(excess_precision,
+ "Return a value, with the same meaning as @code{FLT_EVAL_METHOD} C that\
+ describes which excess precision should be applied. @var{type} is\
+ either @code{EXCESS_PRECISION_TYPE_IMPLICIT},\
+ @code{EXCESS_PRECISION_TYPE_FAST}, or\
+ @code{EXCESS_PRECISION_TYPE_STANDARD}. For\
+ @code{EXCESS_PRECISION_TYPE_IMPLICIT}, the target should return which\
+ precision and range operations will be implictly evaluated in regardless\
+ of the excess precision explicitly added. For\
+ @code{EXCESS_PRECISION_TYPE_STANDARD} and\
+ @code{EXCESS_PRECISION_TYPE_FAST}, the target should return the\
+ explicit excess precision that should be added depending on the\
+ value set for @option{-fexcess-precision=@r{[}standard@r{|}fast@r{]}}.",
+ enum flt_eval_method, (enum excess_precision_type type),
+ default_excess_precision)
+
HOOK_VECTOR_END (c)
/* Functions specific to the C++ frontend. */
@@ -2135,4 +2135,12 @@ default_min_arithmetic_precision (void)
return WORD_REGISTER_OPERATIONS ? BITS_PER_WORD : BITS_PER_UNIT;
}
+/* Default implementation of TARGET_C_EXCESS_PRECISION. */
+
+enum flt_eval_method
+default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED)
+{
+ return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT;
+}
+
#include "gt-targhooks.h"
@@ -263,4 +263,7 @@ extern bool default_optab_supported_p (int, machine_mode, machine_mode,
extern unsigned int default_max_noce_ifcvt_seq_cost (edge);
extern unsigned int default_min_arithmetic_precision (void);
+extern enum flt_eval_method
+default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED);
+
#endif /* GCC_TARGHOOKS_H */