[v9,06/24] target/arm: Reduce tests vs M-profile in cpu_get_tb_cpu_state
diff mbox series

Message ID 20191023150057.25731-7-richard.henderson@linaro.org
State New
Headers show
Series
  • target/arm: Reduce overhead of cpu_get_tb_cpu_state
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Commit Message

Richard Henderson Oct. 23, 2019, 3 p.m. UTC
Hoist the computation of some TBFLAG_A32 bits that only apply to
M-profile under a single test for ARM_FEATURE_M.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/helper.c | 49 +++++++++++++++++++++------------------------
 1 file changed, 23 insertions(+), 26 deletions(-)

Patch
diff mbox series

diff --git a/target/arm/helper.c b/target/arm/helper.c
index d4303420da..296a4b2232 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11194,6 +11194,29 @@  void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
 
         if (arm_feature(env, ARM_FEATURE_M)) {
             flags = rebuild_hflags_m32(env, fp_el, mmu_idx);
+
+            if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
+                FIELD_EX32(env->v7m.fpccr[M_REG_S], V7M_FPCCR, S)
+                != env->v7m.secure) {
+                flags = FIELD_DP32(flags, TBFLAG_A32, FPCCR_S_WRONG, 1);
+            }
+
+            if ((env->v7m.fpccr[env->v7m.secure] & R_V7M_FPCCR_ASPEN_MASK) &&
+                (!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_FPCA_MASK) ||
+                 (env->v7m.secure &&
+                  !(env->v7m.control[M_REG_S] & R_V7M_CONTROL_SFPA_MASK)))) {
+                /*
+                 * ASPEN is set, but FPCA/SFPA indicate that there is no
+                 * active FP context; we must create a new FP context before
+                 * executing any FP insn.
+                 */
+                flags = FIELD_DP32(flags, TBFLAG_A32, NEW_FP_CTXT_NEEDED, 1);
+            }
+
+            bool is_secure = env->v7m.fpccr[M_REG_S] & R_V7M_FPCCR_S_MASK;
+            if (env->v7m.fpccr[is_secure] & R_V7M_FPCCR_LSPACT_MASK) {
+                flags = FIELD_DP32(flags, TBFLAG_A32, LSPACT, 1);
+            }
         } else {
             flags = rebuild_hflags_common_32(env, fp_el, mmu_idx, 0);
         }
@@ -11233,32 +11256,6 @@  void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
         }
     }
 
-    if (arm_feature(env, ARM_FEATURE_M_SECURITY) &&
-        FIELD_EX32(env->v7m.fpccr[M_REG_S], V7M_FPCCR, S) != env->v7m.secure) {
-        flags = FIELD_DP32(flags, TBFLAG_A32, FPCCR_S_WRONG, 1);
-    }
-
-    if (arm_feature(env, ARM_FEATURE_M) &&
-        (env->v7m.fpccr[env->v7m.secure] & R_V7M_FPCCR_ASPEN_MASK) &&
-        (!(env->v7m.control[M_REG_S] & R_V7M_CONTROL_FPCA_MASK) ||
-         (env->v7m.secure &&
-          !(env->v7m.control[M_REG_S] & R_V7M_CONTROL_SFPA_MASK)))) {
-        /*
-         * ASPEN is set, but FPCA/SFPA indicate that there is no active
-         * FP context; we must create a new FP context before executing
-         * any FP insn.
-         */
-        flags = FIELD_DP32(flags, TBFLAG_A32, NEW_FP_CTXT_NEEDED, 1);
-    }
-
-    if (arm_feature(env, ARM_FEATURE_M)) {
-        bool is_secure = env->v7m.fpccr[M_REG_S] & R_V7M_FPCCR_S_MASK;
-
-        if (env->v7m.fpccr[is_secure] & R_V7M_FPCCR_LSPACT_MASK) {
-            flags = FIELD_DP32(flags, TBFLAG_A32, LSPACT, 1);
-        }
-    }
-
     if (!arm_feature(env, ARM_FEATURE_M)) {
         int target_el = arm_debug_target_el(env);