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target-arm: implement WFE/YIELD as a yield for AArch64

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Like was done for AArch32 for WFE, implement both WFE and YIELD as a
yield operation. This speeds up multi-core system emulation.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
Message-id: 1397588401-20366-1-git-send-email-robherring2@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Rob Herring 2014-05-01 15:24:45 +01:00 committed by Peter Maydell
parent e3da9921eb
commit 252ec40576
1 changed files with 6 additions and 0 deletions
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6
target-arm/translate-a64.c
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@ -1151,6 +1151,8 @@ static void handle_hint(DisasContext *s, uint32_t insn,
return;
case 1: /* YIELD */
case 2: /* WFE */
s->is_jmp = DISAS_WFE;
return;
case 4: /* SEV */
case 5: /* SEVL */
/* we treat all as NOP at least for now */
@ -10765,6 +10767,10 @@ void gen_intermediate_code_internal_a64(ARMCPU *cpu,
case DISAS_EXC:
case DISAS_SWI:
break;
case DISAS_WFE:
gen_a64_set_pc_im(dc->pc);
gen_helper_wfe(cpu_env);
break;
case DISAS_WFI:
/* This is a special case because we don't want to just halt the CPU
* if trying to debug across a WFI.