[PATCH] [MIPS] Clear softfpu exception state for round, trunc, ceil and floor

MIPS FPU instructions should start with a clean softfpu status. This
is done for the arithmetic operations and cvt instructions, but not
for round, trunc, ceil and floor.
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

target-mips/op_helper.c

@@ -2282,6 +2282,7 @@ uint64_t helper_float_roundl_d(uint64_t fdt0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_nearest_even, &env->active_fpu.fp_status);
     dt2 = float64_to_int64(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2295,6 +2296,7 @@ uint64_t helper_float_roundl_s(uint32_t fst0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_nearest_even, &env->active_fpu.fp_status);
     dt2 = float32_to_int64(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2308,6 +2310,7 @@ uint32_t helper_float_roundw_d(uint64_t fdt0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_nearest_even, &env->active_fpu.fp_status);
     wt2 = float64_to_int32(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2321,6 +2324,7 @@ uint32_t helper_float_roundw_s(uint32_t fst0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_nearest_even, &env->active_fpu.fp_status);
     wt2 = float32_to_int32(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2334,6 +2338,7 @@ uint64_t helper_float_truncl_d(uint64_t fdt0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     dt2 = float64_to_int64_round_to_zero(fdt0, &env->active_fpu.fp_status);
     update_fcr31();
     if (GET_FP_CAUSE(env->active_fpu.fcr31) & (FP_OVERFLOW | FP_INVALID))
@@ -2345,6 +2350,7 @@ uint64_t helper_float_truncl_s(uint32_t fst0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     dt2 = float32_to_int64_round_to_zero(fst0, &env->active_fpu.fp_status);
     update_fcr31();
     if (GET_FP_CAUSE(env->active_fpu.fcr31) & (FP_OVERFLOW | FP_INVALID))
@@ -2356,6 +2362,7 @@ uint32_t helper_float_truncw_d(uint64_t fdt0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     wt2 = float64_to_int32_round_to_zero(fdt0, &env->active_fpu.fp_status);
     update_fcr31();
     if (GET_FP_CAUSE(env->active_fpu.fcr31) & (FP_OVERFLOW | FP_INVALID))
@@ -2367,6 +2374,7 @@ uint32_t helper_float_truncw_s(uint32_t fst0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     wt2 = float32_to_int32_round_to_zero(fst0, &env->active_fpu.fp_status);
     update_fcr31();
     if (GET_FP_CAUSE(env->active_fpu.fcr31) & (FP_OVERFLOW | FP_INVALID))
@@ -2378,6 +2386,7 @@ uint64_t helper_float_ceill_d(uint64_t fdt0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_up, &env->active_fpu.fp_status);
     dt2 = float64_to_int64(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2391,6 +2400,7 @@ uint64_t helper_float_ceill_s(uint32_t fst0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_up, &env->active_fpu.fp_status);
     dt2 = float32_to_int64(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2404,6 +2414,7 @@ uint32_t helper_float_ceilw_d(uint64_t fdt0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_up, &env->active_fpu.fp_status);
     wt2 = float64_to_int32(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2417,6 +2428,7 @@ uint32_t helper_float_ceilw_s(uint32_t fst0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_up, &env->active_fpu.fp_status);
     wt2 = float32_to_int32(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2430,6 +2442,7 @@ uint64_t helper_float_floorl_d(uint64_t fdt0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_down, &env->active_fpu.fp_status);
     dt2 = float64_to_int64(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2443,6 +2456,7 @@ uint64_t helper_float_floorl_s(uint32_t fst0)
 {
     uint64_t dt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_down, &env->active_fpu.fp_status);
     dt2 = float32_to_int64(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2456,6 +2470,7 @@ uint32_t helper_float_floorw_d(uint64_t fdt0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_down, &env->active_fpu.fp_status);
     wt2 = float64_to_int32(fdt0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;
@@ -2469,6 +2484,7 @@ uint32_t helper_float_floorw_s(uint32_t fst0)
 {
     uint32_t wt2;
 
+    set_float_exception_flags(0, &env->active_fpu.fp_status);
     set_float_rounding_mode(float_round_down, &env->active_fpu.fp_status);
     wt2 = float32_to_int32(fst0, &env->active_fpu.fp_status);
     RESTORE_ROUNDING_MODE;