cpu: Move icount_decr to CPUNegativeOffsetState

Amusingly, we had already ignored the comment to keep this value
at the end of CPUState.  This restores the minimum negative offset
from TCG_AREG0 for code generation.

For the couple of uses within qom/cpu.c, without NEED_CPU_H, add
a pointer from the CPUState object to the IcountDecr object within
CPUNegativeOffsetState.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/cpus.c b/cpus.c
index ffc57119ca..111ca4ed1c 100644
--- a/cpus.c
+++ b/cpus.c
@@ -239,7 +239,8 @@ void qemu_tcg_configure(QemuOpts *opts, Error **errp)
  */
 static int64_t cpu_get_icount_executed(CPUState *cpu)
 {
-    return cpu->icount_budget - (cpu->icount_decr.u16.low + cpu->icount_extra);
+    return (cpu->icount_budget -
+            (cpu_neg(cpu)->icount_decr.u16.low + cpu->icount_extra));
 }
 
 /*
@@ -1389,12 +1390,12 @@ static void prepare_icount_for_run(CPUState *cpu)
          * each vCPU execution. However u16.high can be raised
          * asynchronously by cpu_exit/cpu_interrupt/tcg_handle_interrupt
          */
-        g_assert(cpu->icount_decr.u16.low == 0);
+        g_assert(cpu_neg(cpu)->icount_decr.u16.low == 0);
         g_assert(cpu->icount_extra == 0);
 
         cpu->icount_budget = tcg_get_icount_limit();
         insns_left = MIN(0xffff, cpu->icount_budget);
-        cpu->icount_decr.u16.low = insns_left;
+        cpu_neg(cpu)->icount_decr.u16.low = insns_left;
         cpu->icount_extra = cpu->icount_budget - insns_left;
 
         replay_mutex_lock();
@@ -1408,7 +1409,7 @@ static void process_icount_data(CPUState *cpu)
         cpu_update_icount(cpu);
 
         /* Reset the counters */
-        cpu->icount_decr.u16.low = 0;
+        cpu_neg(cpu)->icount_decr.u16.low = 0;
         cpu->icount_extra = 0;
         cpu->icount_budget = 0;