target/arm: Define new fp_status_a32 and fp_status_a64

We want to split the existing fp_status in the Arm CPUState into
separate float_status fields for AArch32 and AArch64.  (This is
because new control bits defined by FEAT_AFP only have an effect for
AArch64, not AArch32.) To make this split we will:
 * define new fp_status_a32 and fp_status_a64 which have
   identical behaviour to the existing fp_status
 * move existing uses of fp_status to fp_status_a32 or
   fp_status_a64 as appropriate
 * delete the old fp_status when it has no uses left

In this patch we add the new float_status fields.

We will also need to split fp_status_f16, but we will do that
as a separate series of patches.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250124162836.2332150-7-peter.maydell@linaro.org

1 files changed, 2 insertions, 0 deletions

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index dc02312..8bdd535 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -573,6 +573,8 @@ static void arm_cpu_reset_hold(Object *obj, ResetType type)
     set_default_nan_mode(1, &env->vfp.standard_fp_status);
     set_default_nan_mode(1, &env->vfp.standard_fp_status_f16);
     arm_set_default_fp_behaviours(&env->vfp.fp_status);
+    arm_set_default_fp_behaviours(&env->vfp.fp_status_a32);
+    arm_set_default_fp_behaviours(&env->vfp.fp_status_a64);
     arm_set_default_fp_behaviours(&env->vfp.standard_fp_status);
     arm_set_default_fp_behaviours(&env->vfp.fp_status_f16);
     arm_set_default_fp_behaviours(&env->vfp.standard_fp_status_f16);