[PATCH 38/52] avr: New hook implementation avr_c_mode_for_floating_type

[Kewen Lin]

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

gcc/ChangeLog:

        * config/avr/avr.cc (avr_c_mode_for_floating_type): New
        function.
        (TARGET_C_MODE_FOR_FLOATING_TYPE): New macro.
        * config/avr/avr.h (FLOAT_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_SIZE): Likewise.
        (LONG_DOUBLE_TYPE_SIZE): Likewise.
---
 gcc/config/avr/avr.cc | 17 +++++++++++++++++
 gcc/config/avr/avr.h  |  3 ---
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc
index 74924ab0565..61c325f2497 100644
--- a/gcc/config/avr/avr.cc
+++ b/gcc/config/avr/avr.cc
@@ -6930,6 +6930,20 @@ avr_canonicalize_comparison (int *icode, rtx *op0, rtx 
*op1, bool op0_fixed)
     }
 }
 
+/* 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
+avr_c_mode_for_floating_type (enum tree_index ti)
+{
+  if (ti == TI_DOUBLE_TYPE)
+    return avr_double == 32 ? SFmode : DFmode;
+  if (ti == TI_LONG_DOUBLE_TYPE)
+    return avr_long_double == 32 ? SFmode : DFmode;
+  return default_mode_for_floating_type (ti);
+}
+
 
 /* Output compare instruction
 
@@ -16411,6 +16425,9 @@ avr_float_lib_compare_returns_bool (machine_mode mode, 
enum rtx_code)
 #undef  TARGET_HAVE_SPECULATION_SAFE_VALUE
 #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed
 
+#undef TARGET_C_MODE_FOR_FLOATING_TYPE
+#define TARGET_C_MODE_FOR_FLOATING_TYPE avr_c_mode_for_floating_type
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 
diff --git a/gcc/config/avr/avr.h b/gcc/config/avr/avr.h
index 56211fa9cd0..4977e15eeed 100644
--- a/gcc/config/avr/avr.h
+++ b/gcc/config/avr/avr.h
@@ -143,9 +143,6 @@ FIXME: DRIVER_SELF_SPECS has changed.
 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
-#define FLOAT_TYPE_SIZE 32
-#define DOUBLE_TYPE_SIZE (avr_double)
-#define LONG_DOUBLE_TYPE_SIZE (avr_long_double)
 
 #define LONG_LONG_ACCUM_TYPE_SIZE 64
 
-- 
2.43.0