tcg: implement real ext_i32_i64 and extu_i32_i64 ops

Implement real ext_i32_i64 and extu_i32_i64 ops. They ensure that a
32-bit value is always converted to a 64-bit value and not propagated
through the register allocator or the optimizer.

Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Stefan Weil <sw@weilnetz.de>
Acked-by: Claudio Fontana <claudio.fontana@huawei.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 4 insertions, 6 deletions

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 0e79fd1dc6..711431567e 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -1770,9 +1770,8 @@ void tcg_gen_extu_i32_i64(TCGv_i64 ret, TCGv_i32 arg)
         tcg_gen_mov_i32(TCGV_LOW(ret), arg);
         tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
     } else {
-        /* Note: we assume the target supports move between
-           32 and 64 bit registers.  */
-        tcg_gen_ext32u_i64(ret, MAKE_TCGV_I64(GET_TCGV_I32(arg)));
+        tcg_gen_op2(&tcg_ctx, INDEX_op_extu_i32_i64,
+                    GET_TCGV_I64(ret), GET_TCGV_I32(arg));
     }
 }
 
@@ -1782,9 +1781,8 @@ void tcg_gen_ext_i32_i64(TCGv_i64 ret, TCGv_i32 arg)
         tcg_gen_mov_i32(TCGV_LOW(ret), arg);
         tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
     } else {
-        /* Note: we assume the target supports move between
-           32 and 64 bit registers.  */
-        tcg_gen_ext32s_i64(ret, MAKE_TCGV_I64(GET_TCGV_I32(arg)));
+        tcg_gen_op2(&tcg_ctx, INDEX_op_ext_i32_i64,
+                    GET_TCGV_I64(ret), GET_TCGV_I32(arg));
     }
 }