mirror of https://github.com/xemu-project/xemu.git
arm: Move condition-failed codepath generation out of if()
Move the code to generate the "condition failed" instruction codepath out of the if (singlestepping) {} else {}. This will allow adding support for handling a new is_jmp type which can't be neatly split into "singlestepping case" versus "not singlestepping case". Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-id: 1491844419-12485-6-git-send-email-peter.maydell@linaro.org
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@ -11988,9 +11988,9 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
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/* At this stage dc->condjmp will only be set when the skipped
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instruction was a conditional branch or trap, and the PC has
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already been written. */
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gen_set_condexec(dc);
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if (unlikely(cs->singlestep_enabled || dc->ss_active)) {
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/* Unconditional and "condition passed" instruction codepath. */
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gen_set_condexec(dc);
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switch (dc->is_jmp) {
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case DISAS_SWI:
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gen_ss_advance(dc);
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@ -12013,13 +12013,6 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
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/* FIXME: Single stepping a WFI insn will not halt the CPU. */
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gen_singlestep_exception(dc);
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}
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if (dc->condjmp) {
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/* "Condition failed" instruction codepath. */
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gen_set_label(dc->condlabel);
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gen_set_condexec(dc);
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gen_set_pc_im(dc, dc->pc);
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gen_singlestep_exception(dc);
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}
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} else {
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/* While branches must always occur at the end of an IT block,
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there are a few other things that can cause us to terminate
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@ -12029,7 +12022,6 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
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- Hardware watchpoints.
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Hardware breakpoints have already been handled and skip this code.
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*/
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gen_set_condexec(dc);
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switch(dc->is_jmp) {
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case DISAS_NEXT:
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gen_goto_tb(dc, 1, dc->pc);
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@ -12069,11 +12061,17 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
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gen_exception(EXCP_SMC, syn_aa32_smc(), 3);
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break;
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}
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if (dc->condjmp) {
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gen_set_label(dc->condlabel);
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gen_set_condexec(dc);
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}
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if (dc->condjmp) {
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/* "Condition failed" instruction codepath for the branch/trap insn */
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gen_set_label(dc->condlabel);
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gen_set_condexec(dc);
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if (unlikely(cs->singlestep_enabled || dc->ss_active)) {
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gen_set_pc_im(dc, dc->pc);
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gen_singlestep_exception(dc);
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} else {
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gen_goto_tb(dc, 1, dc->pc);
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dc->condjmp = 0;
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}
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}
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