From 0b95df52ecad351c916108e9f3a9d1bc3327b495 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Sat, 8 Sep 2012 03:45:43 +0000 Subject: [PATCH] tcg/s390: fix ld/st with CONFIG_TCG_PASS_AREG0 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 Signed-off-by: Michael Roth --- tcg/s390/tcg-target.c | 14 +++++++------- 1 file 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]);