| Message ID | 1435672316-3311-3-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
On Tue, Jun 30, 2015 at 6:51 AM, Peter Maydell <peter.maydell@linaro.org> wrote: > Implement the YIELD instruction in the ARM and Thumb translators to > actually yield control back to the top level loop rather than being > a simple no-op. (We already do this for A64.) > > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> > --- > target-arm/translate.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/target-arm/translate.c b/target-arm/translate.c > index 971b6db..69ac18c 100644 > --- a/target-arm/translate.c > +++ b/target-arm/translate.c > @@ -4080,6 +4080,10 @@ static void gen_rfe(DisasContext *s, TCGv_i32 pc, TCGv_i32 cpsr) > static void gen_nop_hint(DisasContext *s, int val) > { > switch (val) { > + case 1: /* yield */ > + gen_set_pc_im(s, s->pc); > + s->is_jmp = DISAS_YIELD; > + break; > case 3: /* wfi */ > gen_set_pc_im(s, s->pc); > s->is_jmp = DISAS_WFI; > @@ -11459,6 +11463,9 @@ static inline void gen_intermediate_code_internal(ARMCPU *cpu, > case DISAS_WFE: > gen_helper_wfe(cpu_env); > break; > + case DISAS_YIELD: > + gen_helper_yield(cpu_env); > + break; > case DISAS_SWI: > gen_exception(EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb), > default_exception_el(dc)); > -- > 1.9.1 > >
diff --git a/target-arm/translate.c b/target-arm/translate.c index 971b6db..69ac18c 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -4080,6 +4080,10 @@ static void gen_rfe(DisasContext *s, TCGv_i32 pc, TCGv_i32 cpsr) static void gen_nop_hint(DisasContext *s, int val) { switch (val) { + case 1: /* yield */ + gen_set_pc_im(s, s->pc); + s->is_jmp = DISAS_YIELD; + break; case 3: /* wfi */ gen_set_pc_im(s, s->pc); s->is_jmp = DISAS_WFI; @@ -11459,6 +11463,9 @@ static inline void gen_intermediate_code_internal(ARMCPU *cpu, case DISAS_WFE: gen_helper_wfe(cpu_env); break; + case DISAS_YIELD: + gen_helper_yield(cpu_env); + break; case DISAS_SWI: gen_exception(EXCP_SWI, syn_aa32_svc(dc->svc_imm, dc->thumb), default_exception_el(dc));
Implement the YIELD instruction in the ARM and Thumb translators to actually yield control back to the top level loop rather than being a simple no-op. (We already do this for A64.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- target-arm/translate.c | 7 +++++++ 1 file changed, 7 insertions(+)