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target/arm: Reset btype for direct branches

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This is all of the non-exception cases of DISAS_NORETURN.

Backports commit 358622703583d2e2967e0a93da990e747dcc3ac6 from qemu
This commit is contained in:
Richard Henderson 2019-02-05 17:11:05 -05:00 committed by Lioncash
parent 88193cf7c3
commit 11736a659b
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 6 additions and 0 deletions
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6
qemu/target/arm/translate-a64.c
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@ -1434,6 +1434,7 @@ static void disas_uncond_b_imm(DisasContext *s, uint32_t insn)
}
/* B Branch / BL Branch with link */
reset_btype(s);
gen_goto_tb(s, 0, addr);
}
@ -1459,6 +1460,7 @@ static void disas_comp_b_imm(DisasContext *s, uint32_t insn)
tcg_cmp = read_cpu_reg(s, rt, sf);
label_match = gen_new_label(tcg_ctx);
reset_btype(s);
tcg_gen_brcondi_i64(tcg_ctx, op ? TCG_COND_NE : TCG_COND_EQ,
tcg_cmp, 0, label_match);
@ -1489,6 +1491,8 @@ static void disas_test_b_imm(DisasContext *s, uint32_t insn)
tcg_cmp = tcg_temp_new_i64(tcg_ctx);
tcg_gen_andi_i64(tcg_ctx, tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos));
label_match = gen_new_label(tcg_ctx);
reset_btype(s);
tcg_gen_brcondi_i64(tcg_ctx, op ? TCG_COND_NE : TCG_COND_EQ,
tcg_cmp, 0, label_match);
tcg_temp_free_i64(tcg_ctx, tcg_cmp);
@ -1516,6 +1520,7 @@ static void disas_cond_b_imm(DisasContext *s, uint32_t insn)
addr = s->pc + sextract32(insn, 5, 19) * 4 - 4;
cond = extract32(insn, 0, 4);
reset_btype(s);
if (cond < 0x0e) {
/* genuinely conditional branches */
TCGLabel *label_match = gen_new_label(tcg_ctx);
@ -1678,6 +1683,7 @@ static void handle_sync(DisasContext *s, uint32_t insn,
* a self-modified code correctly and also to take
* any pending interrupts immediately.
*/
reset_btype(s);
gen_goto_tb(s, 0, s->pc);
return;
default: