tcg: Split out tcg_out_extrl_i64_i32

We will need a backend interface for type truncation.  For those backends
that did not enable TCG_TARGET_HAS_extrl_i64_i32, use tcg_out_mov.
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, 6 insertions, 0 deletions

diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index ca8b258..bd1fab1 100644
--- a/tcg/aarch64/tcg-target.c.inc
+++ b/tcg/aarch64/tcg-target.c.inc
@@ -1467,6 +1467,11 @@ static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg rd, TCGReg rn)
     tcg_out_ext32u(s, rd, rn);
 }
 
+static void tcg_out_extrl_i64_i32(TCGContext *s, TCGReg rd, TCGReg rn)
+{
+    tcg_out_mov(s, TCG_TYPE_I32, rd, rn);
+}
+
 static void tcg_out_addsubi(TCGContext *s, int ext, TCGReg rd,
                             TCGReg rn, int64_t aimm)
 {
@@ -2337,6 +2342,7 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
     case INDEX_op_ext32u_i64:
     case INDEX_op_ext_i32_i64:
     case INDEX_op_extu_i32_i64:
+    case INDEX_op_extrl_i64_i32:
     default:
         g_assert_not_reached();
     }