diff options
Diffstat (limited to 'emulators/qemu0/patches/patch-ed')
| -rw-r--r-- | emulators/qemu0/patches/patch-ed | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/emulators/qemu0/patches/patch-ed b/emulators/qemu0/patches/patch-ed new file mode 100644 index 00000000000..fc1415bd937 --- /dev/null +++ b/emulators/qemu0/patches/patch-ed @@ -0,0 +1,32 @@ +$NetBSD: patch-ed,v 1.1 2012/06/07 21:35:37 ryoon Exp $ + +--- target-i386/translate.c.orig 2011-08-08 18:28:42 +0000 ++++ target-i386/translate.c +@@ -4856,20 +4856,23 @@ static target_ulong disas_insn(DisasCont + tcg_gen_sub_tl(t2, cpu_regs[R_EAX], t0); + gen_extu(ot, t2); + tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, label1); ++ label2 = gen_new_label(); + if (mod == 3) { +- label2 = gen_new_label(); + gen_op_mov_reg_v(ot, R_EAX, t0); + tcg_gen_br(label2); + gen_set_label(label1); + gen_op_mov_reg_v(ot, rm, t1); +- gen_set_label(label2); + } else { +- tcg_gen_mov_tl(t1, t0); ++ /* perform no-op store cycle like physical cpu; must be ++ before changing accumulator to ensure idempotency if ++ the store faults and the instruction is restarted */ ++ gen_op_st_v(ot + s->mem_index, t0, a0); + gen_op_mov_reg_v(ot, R_EAX, t0); ++ tcg_gen_br(label2); + gen_set_label(label1); +- /* always store */ + gen_op_st_v(ot + s->mem_index, t1, a0); + } ++ gen_set_label(label2); + tcg_gen_mov_tl(cpu_cc_src, t0); + tcg_gen_mov_tl(cpu_cc_dst, t2); + s->cc_op = CC_OP_SUBB + ot; |