target/arm: Export cpsr_{read_for, write_from}_spsr_elx

Move cpsr_write_from_spsr_elx from tcg/helper-a64.c to
helper.c, so that it's present with --disable-tcg.
Declare both in internals.h.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251008215613.300150-36-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/helper.c

@@ -8896,7 +8896,7 @@ static int aarch64_regnum(CPUARMState *env, int aarch32_reg)
     }
 }
 
-static uint32_t cpsr_read_for_spsr_elx(CPUARMState *env)
+uint32_t cpsr_read_for_spsr_elx(CPUARMState *env)
 {
     uint32_t ret = cpsr_read(env);
 
@@ -8911,6 +8911,24 @@ static uint32_t cpsr_read_for_spsr_elx(CPUARMState *env)
     return ret;
 }
 
+void cpsr_write_from_spsr_elx(CPUARMState *env, uint32_t val)
+{
+    uint32_t mask;
+
+    /* Save SPSR_ELx.SS into PSTATE. */
+    env->pstate = (env->pstate & ~PSTATE_SS) | (val & PSTATE_SS);
+    val &= ~PSTATE_SS;
+
+    /* Move DIT to the correct location for CPSR */
+    if (val & PSTATE_DIT) {
+        val &= ~PSTATE_DIT;
+        val |= CPSR_DIT;
+    }
+
+    mask = aarch32_cpsr_valid_mask(env->features, &env_archcpu(env)->isar);
+    cpsr_write(env, val, mask, CPSRWriteRaw);
+}
+
 static bool syndrome_is_sync_extabt(uint32_t syndrome)
 {
     /* Return true if this syndrome value is a synchronous external abort */

target/arm/internals.h

@@ -1897,6 +1897,8 @@ void vfp_clear_float_status_exc_flags(CPUARMState *env);
  */
 void vfp_set_fpcr_to_host(CPUARMState *env, uint32_t val, uint32_t mask);
 bool arm_pan_enabled(CPUARMState *env);
+uint32_t cpsr_read_for_spsr_elx(CPUARMState *env);
+void cpsr_write_from_spsr_elx(CPUARMState *env, uint32_t val);
 
 /* Compare uint64_t for qsort and bsearch. */
 int compare_u64(const void *a, const void *b);

target/arm/tcg/helper-a64.c

@@ -615,26 +615,6 @@ static int el_from_spsr(uint32_t spsr)
     }
 }
 
-static void cpsr_write_from_spsr_elx(CPUARMState *env,
-                                     uint32_t val)
-{
-    uint32_t mask;
-
-    /* Save SPSR_ELx.SS into PSTATE. */
-    env->pstate = (env->pstate & ~PSTATE_SS) | (val & PSTATE_SS);
-    val &= ~PSTATE_SS;
-
-    /* Move DIT to the correct location for CPSR */
-    if (val & PSTATE_DIT) {
-        val &= ~PSTATE_DIT;
-        val |= CPSR_DIT;
-    }
-
-    mask = aarch32_cpsr_valid_mask(env->features, \
-        &env_archcpu(env)->isar);
-    cpsr_write(env, val, mask, CPSRWriteRaw);
-}
-
 void HELPER(exception_return)(CPUARMState *env, uint64_t new_pc)
 {
     ARMCPU *cpu = env_archcpu(env);