[PATCH 37/52] alpha: New hook implementation alpha_c_mode_for_floating_type

[Kewen Lin]

This is to remove macros {FLOAT,{,LONG_}DOUBLE}_TYPE_SIZE
defines in alpha port, and add new port specific hook
implementation alpha_c_mode_for_floating_type.

gcc/ChangeLog:

        * config/alpha/alpha.cc (alpha_c_mode_for_floating_type): New
        function.
        (TARGET_C_MODE_FOR_FLOATING_TYPE): New macro.
        * config/alpha/alpha.h (FLOAT_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_SIZE): Likewise.
        (LONG_DOUBLE_TYPE_SIZE): Likewise.
---
 gcc/config/alpha/alpha.cc | 17 ++++++++++++++++-
 gcc/config/alpha/alpha.h  |  8 --------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/gcc/config/alpha/alpha.cc b/gcc/config/alpha/alpha.cc
index 1126cea1f7b..a6fe95e7177 100644
--- a/gcc/config/alpha/alpha.cc
+++ b/gcc/config/alpha/alpha.cc
@@ -9916,7 +9916,19 @@ alpha_can_change_mode_class (machine_mode from, 
machine_mode to,
   return (GET_MODE_SIZE (from) == GET_MODE_SIZE (to)
          || !reg_classes_intersect_p (FLOAT_REGS, rclass));
 }
-
+
+/* Implement TARGET_C_MODE_FOR_FLOATING_TYPE.  Return TFmode or DFmode
+   for TI_LONG_DOUBLE_TYPE which is for long double type, go with the
+   default one for the others.  */
+
+static machine_mode
+alpha_c_mode_for_floating_type (enum tree_index ti)
+{
+  if (ti == TI_LONG_DOUBLE_TYPE)
+    return TARGET_LONG_DOUBLE_128 ? TFmode : DFmode;
+  return default_mode_for_floating_type (ti);
+}
+
 /* Initialize the GCC target structure.  */
 #if TARGET_ABI_OPEN_VMS
 # undef TARGET_ATTRIBUTE_TABLE
@@ -10123,6 +10135,9 @@ alpha_can_change_mode_class (machine_mode from, 
machine_mode to,
 #undef TARGET_CAN_CHANGE_MODE_CLASS
 #define TARGET_CAN_CHANGE_MODE_CLASS alpha_can_change_mode_class
 
+#undef TARGET_C_MODE_FOR_FLOATING_TYPE
+#define TARGET_C_MODE_FOR_FLOATING_TYPE alpha_c_mode_for_floating_type
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 
diff --git a/gcc/config/alpha/alpha.h b/gcc/config/alpha/alpha.h
index 25ccfce96b8..ee9e0918038 100644
--- a/gcc/config/alpha/alpha.h
+++ b/gcc/config/alpha/alpha.h
@@ -195,14 +195,6 @@ extern enum alpha_fp_trap_mode alpha_fptm;
 /* Define the size of `long long'.  The default is the twice the word size.  */
 #define LONG_LONG_TYPE_SIZE 64
 
-/* The two floating-point formats we support are S-floating, which is
-   4 bytes, and T-floating, which is 8 bytes.  `float' is S and `double'
-   and `long double' are T.  */
-
-#define FLOAT_TYPE_SIZE 32
-#define DOUBLE_TYPE_SIZE 64
-#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
-
 /* Work around target_flags dependency in ada/targtyps.cc.  */
 #define WIDEST_HARDWARE_FP_SIZE 64
 
-- 
2.43.0