[PATCH 41/52] riscv: New hook implementation riscv_c_mode_for_floating_type

[Kewen Lin]

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

gcc/ChangeLog:

        * config/riscv/riscv.cc (riscv_c_mode_for_floating_type): New function.
        (TARGET_C_MODE_FOR_FLOATING_TYPE): New macro.
        * config/riscv/riscv.h (FLOAT_TYPE_SIZE): Remove.
        (DOUBLE_TYPE_SIZE): Likewise.
        (LONG_DOUBLE_TYPE_SIZE): Likewise.
---
 gcc/config/riscv/riscv.cc | 15 +++++++++++++++
 gcc/config/riscv/riscv.h  |  4 ----
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 92935275aaa..b011344cabe 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -11449,6 +11449,18 @@ riscv_expand_usadd (rtx dest, rtx x, rtx y)
   emit_move_insn (dest, gen_lowpart (mode, xmode_dest));
 }
 
+/* Implement TARGET_C_MODE_FOR_FLOATING_TYPE.  Return TFmode for
+   TI_LONG_DOUBLE_TYPE which is for long double type, go with the
+   default one for the others.  */
+
+static machine_mode
+riscv_c_mode_for_floating_type (enum tree_index ti)
+{
+  if (ti == TI_LONG_DOUBLE_TYPE)
+    return TFmode;
+  return default_mode_for_floating_type (ti);
+}
+
 /* Initialize the GCC target structure.  */
 #undef TARGET_ASM_ALIGNED_HI_OP
 #define TARGET_ASM_ALIGNED_HI_OP "\t.half\t"
@@ -11804,6 +11816,9 @@ riscv_expand_usadd (rtx dest, rtx x, rtx y)
 #undef TARGET_GET_RAW_RESULT_MODE
 #define TARGET_GET_RAW_RESULT_MODE riscv_get_raw_result_mode
 
+#undef TARGET_C_MODE_FOR_FLOATING_TYPE
+#define TARGET_C_MODE_FOR_FLOATING_TYPE riscv_c_mode_for_floating_type
+
 struct gcc_target targetm = TARGET_INITIALIZER;
 
 #include "gt-riscv.h"
diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
index d6b14c4d620..83c4677c6a1 100644
--- a/gcc/config/riscv/riscv.h
+++ b/gcc/config/riscv/riscv.h
@@ -188,10 +188,6 @@ ASM_MISA_SPEC
 #define POINTER_SIZE (riscv_abi >= ABI_LP64 ? 64 : 32)
 #define LONG_TYPE_SIZE POINTER_SIZE
 
-#define FLOAT_TYPE_SIZE 32
-#define DOUBLE_TYPE_SIZE 64
-#define LONG_DOUBLE_TYPE_SIZE 128
-
 /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
 #define PARM_BOUNDARY BITS_PER_WORD
 
-- 
2.43.0