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target-arm: A64: Handle blr lr

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For linked branches, updates to the link register happen
conceptually after the read of the branch target register.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Cc: qemu-stable@nongnu.org
Message-id: 1398926097-28097-3-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2014-05-01 15:24:45 +01:00 • committed by Peter Maydell
parent fed3ffb9f1
commit 1b505f93bc
1 changed files with 2 additions and 1 deletions
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3
target-arm/translate-a64.c
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@ -1509,8 +1509,10 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn)
switch (opc) { switch (opc) {
case 0: /* BR */ case 0: /* BR */
case 2: /* RET */ case 2: /* RET */
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
break; break;
case 1: /* BLR */ case 1: /* BLR */
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
tcg_gen_movi_i64(cpu_reg(s, 30), s->pc); tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
break; break;
case 4: /* ERET */ case 4: /* ERET */
@ -1529,7 +1531,6 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn)
return; return;
} }
tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
s->is_jmp = DISAS_JUMP; s->is_jmp = DISAS_JUMP;
} }