target/riscv: trans_rvv: Avoid assert for RV32 and e64

When running a 32-bit guest, with a e64 vmv.v.x and vl_eq_vlmax set to
true the `tcg_debug_assert(vece <= MO_32)` will be triggered inside
tcg_gen_gvec_dup_i32().

This patch checks that condition and instead uses tcg_gen_gvec_dup_i64()
is required.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1028
Suggested-by: Robert Bu <robert.bu@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220608234701.369536-1-alistair.francis@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc
index 4f84d4878a..6c091824b6 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -2128,8 +2128,16 @@ static bool trans_vmv_v_x(DisasContext *s, arg_vmv_v_x *a)
         s1 = get_gpr(s, a->rs1, EXT_SIGN);
 
         if (s->vl_eq_vlmax && !(s->vta && s->lmul < 0)) {
-            tcg_gen_gvec_dup_tl(s->sew, vreg_ofs(s, a->rd),
-                                MAXSZ(s), MAXSZ(s), s1);
+            if (get_xl(s) == MXL_RV32 && s->sew == MO_64) {
+                TCGv_i64 s1_i64 = tcg_temp_new_i64();
+                tcg_gen_ext_tl_i64(s1_i64, s1);
+                tcg_gen_gvec_dup_i64(s->sew, vreg_ofs(s, a->rd),
+                                     MAXSZ(s), MAXSZ(s), s1_i64);
+                tcg_temp_free_i64(s1_i64);
+            } else {
+                tcg_gen_gvec_dup_tl(s->sew, vreg_ofs(s, a->rd),
+                                    MAXSZ(s), MAXSZ(s), s1);
+            }
         } else {
             TCGv_i32 desc;
             TCGv_i64 s1_i64 = tcg_temp_new_i64();