target/arm: Remove now-unused vfp.fp_status and FPST_FPCR

Now we have moved all the uses of vfp.fp_status and FPST_FPCR
to either the A32 or A64 fields, we can remove these.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250124162836.2332150-13-peter.maydell@linaro.org

target/arm/cpu.c

@@ -572,7 +572,6 @@ static void arm_cpu_reset_hold(Object *obj, ResetType type)
     set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
     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);

target/arm/cpu.h

@@ -633,7 +633,6 @@ typedef struct CPUArchState {
 
         /* There are a number of distinct float control structures:
          *
-         *  fp_status: is the "normal" fp status.
          *  fp_status_a32: is the "normal" fp status for AArch32 insns
          *  fp_status_a64: is the "normal" fp status for AArch64 insns
          *  fp_status_fp16: used for half-precision calculations
@@ -660,7 +659,6 @@ typedef struct CPUArchState {
          * only thing which needs to read the exception flags being
          * an explicit FPSCR read.
          */
-        float_status fp_status;
         float_status fp_status_a32;
         float_status fp_status_a64;
         float_status fp_status_f16;

target/arm/tcg/translate.h

@@ -670,7 +670,6 @@ static inline CPUARMTBFlags arm_tbflags_from_tb(const TranslationBlock *tb)
  * Enum for argument to fpstatus_ptr().
  */
 typedef enum ARMFPStatusFlavour {
-    FPST_FPCR,
     FPST_A32,
     FPST_A64,
     FPST_FPCR_F16,
@@ -686,8 +685,6 @@ typedef enum ARMFPStatusFlavour {
  * been set up to point to the requested field in the CPU state struct.
  * The options are:
  *
- * FPST_FPCR
- *   for non-FP16 operations controlled by the FPCR
  * FPST_A32
  *   for AArch32 non-FP16 operations controlled by the FPCR
  * FPST_A64
@@ -705,9 +702,6 @@ static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
     int offset;
 
     switch (flavour) {
-    case FPST_FPCR:
-        offset = offsetof(CPUARMState, vfp.fp_status);
-        break;
     case FPST_A32:
         offset = offsetof(CPUARMState, vfp.fp_status_a32);
         break;

target/arm/vfp_helper.c

@@ -61,9 +61,8 @@ static inline uint32_t vfp_exceptbits_from_host(int host_bits)
 
 static uint32_t vfp_get_fpsr_from_host(CPUARMState *env)
 {
-    uint32_t i;
+    uint32_t i = 0;
 
-    i = get_float_exception_flags(&env->vfp.fp_status);
     i |= get_float_exception_flags(&env->vfp.fp_status_a32);
     i |= get_float_exception_flags(&env->vfp.fp_status_a64);
     i |= get_float_exception_flags(&env->vfp.standard_fp_status);
@@ -82,7 +81,6 @@ static void vfp_clear_float_status_exc_flags(CPUARMState *env)
      * values. The caller should have arranged for env->vfp.fpsr to
      * be the architecturally up-to-date exception flag information first.
      */
-    set_float_exception_flags(0, &env->vfp.fp_status);
     set_float_exception_flags(0, &env->vfp.fp_status_a32);
     set_float_exception_flags(0, &env->vfp.fp_status_a64);
     set_float_exception_flags(0, &env->vfp.fp_status_f16);
@@ -112,7 +110,6 @@ static void vfp_set_fpcr_to_host(CPUARMState *env, uint32_t val, uint32_t mask)
             i = float_round_to_zero;
             break;
         }
-        set_float_rounding_mode(i, &env->vfp.fp_status);
         set_float_rounding_mode(i, &env->vfp.fp_status_a32);
         set_float_rounding_mode(i, &env->vfp.fp_status_a64);
         set_float_rounding_mode(i, &env->vfp.fp_status_f16);
@@ -126,8 +123,6 @@ static void vfp_set_fpcr_to_host(CPUARMState *env, uint32_t val, uint32_t mask)
     }
     if (changed & FPCR_FZ) {
         bool ftz_enabled = val & FPCR_FZ;
-        set_flush_to_zero(ftz_enabled, &env->vfp.fp_status);
-        set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status);
         set_flush_to_zero(ftz_enabled, &env->vfp.fp_status_a32);
         set_flush_inputs_to_zero(ftz_enabled, &env->vfp.fp_status_a32);
         set_flush_to_zero(ftz_enabled, &env->vfp.fp_status_a64);
@@ -135,7 +130,6 @@ static void vfp_set_fpcr_to_host(CPUARMState *env, uint32_t val, uint32_t mask)
     }
     if (changed & FPCR_DN) {
         bool dnan_enabled = val & FPCR_DN;
-        set_default_nan_mode(dnan_enabled, &env->vfp.fp_status);
         set_default_nan_mode(dnan_enabled, &env->vfp.fp_status_a32);
         set_default_nan_mode(dnan_enabled, &env->vfp.fp_status_a64);
         set_default_nan_mode(dnan_enabled, &env->vfp.fp_status_f16);