937a6294da
This package tracks qemu-0.*. At least, NetBSD/sparc 5.1.2 and 6.0_BETA2 does not work stably on qemu-system-sparc from newer qemu-1.1.0.
32 lines
1.4 KiB
Text
32 lines
1.4 KiB
Text
$NetBSD: patch-ed,v 1.1 2012/06/07 21:35:37 ryoon Exp $
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--- target-i386/translate.c.orig 2011-08-08 18:28:42 +0000
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+++ target-i386/translate.c
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@@ -4856,20 +4856,23 @@ static target_ulong disas_insn(DisasCont
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tcg_gen_sub_tl(t2, cpu_regs[R_EAX], t0);
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gen_extu(ot, t2);
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tcg_gen_brcondi_tl(TCG_COND_EQ, t2, 0, label1);
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+ label2 = gen_new_label();
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if (mod == 3) {
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- label2 = gen_new_label();
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gen_op_mov_reg_v(ot, R_EAX, t0);
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tcg_gen_br(label2);
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gen_set_label(label1);
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gen_op_mov_reg_v(ot, rm, t1);
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- gen_set_label(label2);
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} else {
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- tcg_gen_mov_tl(t1, t0);
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+ /* perform no-op store cycle like physical cpu; must be
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+ before changing accumulator to ensure idempotency if
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+ the store faults and the instruction is restarted */
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+ gen_op_st_v(ot + s->mem_index, t0, a0);
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gen_op_mov_reg_v(ot, R_EAX, t0);
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+ tcg_gen_br(label2);
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gen_set_label(label1);
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- /* always store */
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gen_op_st_v(ot + s->mem_index, t1, a0);
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}
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+ gen_set_label(label2);
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tcg_gen_mov_tl(cpu_cc_src, t0);
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tcg_gen_mov_tl(cpu_cc_dst, t2);
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s->cc_op = CC_OP_SUBB + ot;
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