Commit c87e5a61 authored by Peter Maydell's avatar Peter Maydell
Browse files

target-arm: Implement YIELD insn to yield in ARM and Thumb translators 



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: default avatarPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: default avatarPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 1435672316-3311-3-git-send-email-peter.maydell@linaro.org
parent 049e24a1

target-arm/translate.c

+7 −0
Original line number Diff line number Diff line
@@ -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));