[PATCH 46/52] h8300: New hook implementation h8300_c_mode_for_floating_type

[Kewen Lin]

This is to add new port specific hook implementation
h8300_c_mode_for_floating_type, remove useless macro
defines for {FLOAT,{,LONG_}DOUBLE}_TYPE_SIZE and add
new macro DOUBLE_TYPE_MODE which some subtarget can
redefine.

gcc/ChangeLog:

        * config/h8300/h8300.cc (h8300_c_mode_for_floating_type): New
        function.
        (TARGET_C_MODE_FOR_FLOATING_TYPE): New macro.
        * config/h8300/h8300.h (FLOAT_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_SIZE): Remove.
        (LONG_DOUBLE_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_MODE): New macro.
        * config/h8300/linux.h (DOUBLE_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_MODE): New macro.
---
 gcc/config/h8300/h8300.cc | 15 +++++++++++++++
 gcc/config/h8300/h8300.h  |  4 +---
 gcc/config/h8300/linux.h  |  4 ++--
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/gcc/config/h8300/h8300.cc b/gcc/config/h8300/h8300.cc
index 9ac6d52f9d6..7ab26f2b7f9 100644
--- a/gcc/config/h8300/h8300.cc
+++ b/gcc/config/h8300/h8300.cc
@@ -5601,6 +5601,18 @@ h8300_ok_for_sibcall_p (tree fndecl, tree)
   return 1;
 }
 
+/* Implement TARGET_C_MODE_FOR_FLOATING_TYPE.  Return SFmode or DFmode
+   for TI_{LONG_,}DOUBLE_TYPE which is for {long,} double type, go with
+   the default one for the others.  */
+
+static machine_mode
+h8300_c_mode_for_floating_type (enum tree_index ti)
+{
+  if (ti == TI_DOUBLE_TYPE || ti == TI_LONG_DOUBLE_TYPE)
+    return DOUBLE_TYPE_MODE;
+  return default_mode_for_floating_type (ti);
+}
+
 /* Return TRUE if OP is a PRE_INC or PRE_DEC
    instruction using REG, FALSE otherwise.  */
 
@@ -5721,4 +5733,7 @@ pre_incdec_with_reg (rtx op, unsigned int reg)
 #undef TARGET_FUNCTION_OK_FOR_SIBCALL
 #define TARGET_FUNCTION_OK_FOR_SIBCALL h8300_ok_for_sibcall_p
 
+#undef TARGET_C_MODE_FOR_FLOATING_TYPE
+#define TARGET_C_MODE_FOR_FLOATING_TYPE h8300_c_mode_for_floating_type
+
 struct gcc_target targetm = TARGET_INITIALIZER;
diff --git a/gcc/config/h8300/h8300.h b/gcc/config/h8300/h8300.h
index bb0bf7404e0..d25689ccec8 100644
--- a/gcc/config/h8300/h8300.h
+++ b/gcc/config/h8300/h8300.h
@@ -149,9 +149,7 @@ extern const char * const *h8_reg_names;
 #define INT_TYPE_SIZE          (TARGET_INT32 ? 32 : 16)
 #define LONG_TYPE_SIZE         32
 #define LONG_LONG_TYPE_SIZE    64
-#define FLOAT_TYPE_SIZE        32
-#define DOUBLE_TYPE_SIZE       32
-#define LONG_DOUBLE_TYPE_SIZE  DOUBLE_TYPE_SIZE
+#define DOUBLE_TYPE_MODE       SFmode
 
 #define MAX_FIXED_MODE_SIZE    32
 
diff --git a/gcc/config/h8300/linux.h b/gcc/config/h8300/linux.h
index 326c481b512..6e21db37655 100644
--- a/gcc/config/h8300/linux.h
+++ b/gcc/config/h8300/linux.h
@@ -36,8 +36,8 @@ along with GCC; see the file COPYING3.  If not see
 #define TARGET_DEFAULT (MASK_QUICKCALL | MASK_INT32 | MASK_H8300H)
 
 /* Width of a word, in units (bytes).  */
-#undef DOUBLE_TYPE_SIZE
-#define DOUBLE_TYPE_SIZE       64
+#undef DOUBLE_TYPE_MODE
+#define DOUBLE_TYPE_MODE       DFmode
 
 #undef DEFAULT_SIGNED_CHAR
 #define DEFAULT_SIGNED_CHAR 1
-- 
2.43.0