From: Alex Bennée <[email protected]> rn == 31 always means SP (not XZR) whether an add_sub_ext instruction is setting the flags or not; only rd has behaviour dependent on whether we are setting flags.
Reported-by: Laurent Desnogues <[email protected]> Signed-off-by: Alex Bennée <[email protected]> Signed-off-by: Peter Maydell <[email protected]> --- target-arm/translate-a64.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 37252b7..444dd85 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -3096,12 +3096,11 @@ static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) /* non-flag setting ops may use SP */ if (!setflags) { - tcg_rn = read_cpu_reg_sp(s, rn, sf); tcg_rd = cpu_reg_sp(s, rd); } else { - tcg_rn = read_cpu_reg(s, rn, sf); tcg_rd = cpu_reg(s, rd); } + tcg_rn = read_cpu_reg_sp(s, rn, sf); tcg_rm = read_cpu_reg(s, rm, sf); ext_and_shift_reg(tcg_rm, tcg_rm, option, imm3); -- 1.9.0
