[Stable-8.2.3 63/87] trans_rvv.c.inc: set vstart = 0 in int scalar move insns

[Michael Tokarev]

From: Daniel Henrique Barboza <dbarb...@ventanamicro.com>

trans_vmv_x_s, trans_vmv_s_x, trans_vfmv_f_s and trans_vfmv_s_f aren't
setting vstart = 0 after execution. This is usually done by a helper in
vector_helper.c but these functions don't use helpers.

We'll set vstart after any potential 'over' brconds, and that will also
mandate a mark_vs_dirty() too.

Fixes: dedc53cbc9 ("target/riscv: rvv-1.0: integer scalar move instructions")
Signed-off-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>
Message-ID: <20240314175704.478276-3-dbarb...@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
(cherry picked from commit 0848f7c18ef50de9f955e7eeb4363d92766a41bf)
Signed-off-by: Michael Tokarev <m...@tls.msk.ru>

diff --git a/target/riscv/insn_trans/trans_rvv.c.inc 
b/target/riscv/insn_trans/trans_rvv.c.inc
index 78bd363310..8bbea80c58 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -3360,6 +3360,8 @@ static bool trans_vmv_x_s(DisasContext *s, arg_vmv_x_s *a)
         vec_element_loadi(s, t1, a->rs2, 0, true);
         tcg_gen_trunc_i64_tl(dest, t1);
         gen_set_gpr(s, a->rd, dest);
+        tcg_gen_movi_tl(cpu_vstart, 0);
+        mark_vs_dirty(s);
         return true;
     }
     return false;
@@ -3386,8 +3388,9 @@ static bool trans_vmv_s_x(DisasContext *s, arg_vmv_s_x *a)
         s1 = get_gpr(s, a->rs1, EXT_NONE);
         tcg_gen_ext_tl_i64(t1, s1);
         vec_element_storei(s, a->rd, 0, t1);
-        mark_vs_dirty(s);
         gen_set_label(over);
+        tcg_gen_movi_tl(cpu_vstart, 0);
+        mark_vs_dirty(s);
         return true;
     }
     return false;
@@ -3414,6 +3417,8 @@ static bool trans_vfmv_f_s(DisasContext *s, arg_vfmv_f_s 
*a)
         }
 
         mark_fs_dirty(s);
+        tcg_gen_movi_tl(cpu_vstart, 0);
+        mark_vs_dirty(s);
         return true;
     }
     return false;
@@ -3439,8 +3444,9 @@ static bool trans_vfmv_s_f(DisasContext *s, arg_vfmv_s_f 
*a)
         do_nanbox(s, t1, cpu_fpr[a->rs1]);
 
         vec_element_storei(s, a->rd, 0, t1);
-        mark_vs_dirty(s);
         gen_set_label(over);
+        tcg_gen_movi_tl(cpu_vstart, 0);
+        mark_vs_dirty(s);
         return true;
     }
     return false;
-- 
2.39.2