tcg: Split out tcg_out_ext16s

We will need a backend interface for performing 16-bit sign-extend.
Use it in tcg_reg_alloc_op in the meantime.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 5a712e3..9d305b9 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -563,6 +563,12 @@ static void tcg_out_ext8u(TCGContext *s, TCGReg rd, TCGReg rs)
     tcg_out_opc_imm(s, OPC_ANDI, rd, rs, 0xff);
 }
 
+static void tcg_out_ext16s(TCGContext *s, TCGType type, TCGReg rd, TCGReg rs)
+{
+    tcg_debug_assert(TCG_TARGET_HAS_ext16s_i32);
+    tcg_out_opc_reg(s, OPC_SEH, rd, TCG_REG_ZERO, rs);
+}
+
 static void tcg_out_addi_ptr(TCGContext *s, TCGReg rd, TCGReg rs,
                              tcg_target_long imm)
 {
@@ -2256,9 +2262,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
     case INDEX_op_not_i64:
         i1 = OPC_NOR;
         goto do_unary;
-    case INDEX_op_ext16s_i32:
-    case INDEX_op_ext16s_i64:
-        i1 = OPC_SEH;
     do_unary:
         tcg_out_opc_reg(s, i1, a0, TCG_REG_ZERO, a1);
         break;
@@ -2430,6 +2433,8 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
     case INDEX_op_ext8s_i64:
     case INDEX_op_ext8u_i32:
     case INDEX_op_ext8u_i64:
+    case INDEX_op_ext16s_i32:
+    case INDEX_op_ext16s_i64:
     default:
         g_assert_not_reached();
     }