From patchwork Mon Sep 10 11:40:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [12/12] tcg/s390: fix ld/st with CONFIG_TCG_PASS_AREG0 Date: Mon, 10 Sep 2012 01:40:57 -0000 From: Alexander Graf X-Patchwork-Id: 182852 Message-Id: <1347277257-22639-13-git-send-email-agraf@suse.de> To: qemu-devel qemu-devel Cc: Blue Swirl , Aurelien Jarno From: Aurelien Jarno The load/store slow path has been broken in e141ab52d: - We need to move 4 registers for store functions and 3 registers for load functions and not the reverse. - According to the s390x calling convention the arguments of a function should be zero extended. This means that the register shift should be done with TCG_TYPE_I64 to ensure the higher word is correctly zero extended when needed. I am aware that CONFIG_TCG_PASS_AREG0 is being removed and thus that this patch can be improved, but doing so means it can also be applied to the 1.1 and 1.2 stable branches. Signed-off-by: Aurelien Jarno Signed-off-by: Alexander Graf --- tcg/s390/tcg-target.c | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-) diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c index 04662c1..99b5339 100644 --- a/tcg/s390/tcg-target.c +++ b/tcg/s390/tcg-target.c @@ -1509,11 +1509,13 @@ static void tcg_prepare_qemu_ldst(TCGContext* s, TCGReg data_reg, tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, mem_index); #ifdef CONFIG_TCG_PASS_AREG0 /* XXX/FIXME: suboptimal */ - tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[2], + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3], + tcg_target_call_iarg_regs[2]); + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2], tcg_target_call_iarg_regs[1]); - tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1], + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1], tcg_target_call_iarg_regs[0]); - tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0], TCG_AREG0); #endif tgen_calli(s, (tcg_target_ulong)qemu_st_helpers[s_bits]); @@ -1521,13 +1523,11 @@ static void tcg_prepare_qemu_ldst(TCGContext* s, TCGReg data_reg, tcg_out_movi(s, TCG_TYPE_I32, arg1, mem_index); #ifdef CONFIG_TCG_PASS_AREG0 /* XXX/FIXME: suboptimal */ - tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[3], - tcg_target_call_iarg_regs[2]); tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2], tcg_target_call_iarg_regs[1]); - tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1], + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1], tcg_target_call_iarg_regs[0]); - tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], + tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0], TCG_AREG0); #endif tgen_calli(s, (tcg_target_ulong)qemu_ld_helpers[s_bits]);