[gcc r13-3000] RISC-V: Support -fexcess-precision=16

[Palmer Dabbelt <palmer@gcc.gnu.org>]

https://gcc.gnu.org/g:75c0899493cd84e64bd30210e848d0d1e9979494

commit r13-3000-g75c0899493cd84e64bd30210e848d0d1e9979494
Author: Palmer Dabbelt <palmer@rivosinc.com>
Date:   Fri Sep 9 02:43:26 2022 -0700

    RISC-V: Support -fexcess-precision=16
    
    This fixes f19a327077e ("Support -fexcess-precision=16 which will enable
    FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 when backend supports _Float16.") on
    RISC-V targets.
    
    gcc/ChangeLog
    
            PR target/106815
            * config/riscv/riscv.cc (riscv_excess_precision): Add support
            for EXCESS_PRECISION_TYPE_FLOAT16.

Diff:
---
 gcc/config/riscv/riscv.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 200ad6031fd..0a4c37e8915 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -6284,6 +6284,7 @@ riscv_excess_precision (enum excess_precision_type type)
       return (TARGET_ZFH ? FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16
 			 : FLT_EVAL_METHOD_PROMOTE_TO_FLOAT);
     case EXCESS_PRECISION_TYPE_IMPLICIT:
+    case EXCESS_PRECISION_TYPE_FLOAT16:
       return FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16;
     default:
       gcc_unreachable ();