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| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-08 03:45:43 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2012-09-10 13:38:33 +0200 |
| commit | 6845df48cec9cc6833429942b3ceed333a791119 (patch) | |
| tree | 029b48d677d0f3f078315d528a2d2672fe5dd995 /tcg/s390/tcg-target.c | |
| parent | 19b0516fb4fd22b08c6ee42ea4162aaf3b9c8ee1 (diff) | |
| download | qemu-6845df48cec9cc6833429942b3ceed333a791119.tar.gz qemu-6845df48cec9cc6833429942b3ceed333a791119.tar.bz2 qemu-6845df48cec9cc6833429942b3ceed333a791119.zip | |
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 <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'tcg/s390/tcg-target.c')
| -rw-r--r-- | 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 04662c15fd..99b53390c5 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]); |