1 files changed, 72 insertions, 0 deletions
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c
index ab120b5f59..8314791f50 100644
--- a/target/m68k/fpu_helper.c
+++ b/target/m68k/fpu_helper.c
@@ -164,6 +164,78 @@ void HELPER(set_fpcr)(CPUM68KState *env, uint32_t val)
     cpu_m68k_set_fpcr(env, val);
 }
 
+/* Convert host exception flags to cpu_m68k form.  */
+static int cpu_m68k_exceptbits_from_host(int host_bits)
+{
+    int target_bits = 0;
+
+    if (host_bits & float_flag_invalid) {
+        target_bits |= 0x80;
+    }
+    if (host_bits & float_flag_overflow) {
+        target_bits |= 0x40;
+    }
+    if (host_bits & (float_flag_underflow | float_flag_output_denormal)) {
+        target_bits |= 0x20;
+    }
+    if (host_bits & float_flag_divbyzero) {
+        target_bits |= 0x10;
+    }
+    if (host_bits & float_flag_inexact) {
+        target_bits |= 0x08;
+    }
+    return target_bits;
+}
+
+/* Convert cpu_m68k exception flags to target form.  */
+static int cpu_m68k_exceptbits_to_host(int target_bits)
+{
+    int host_bits = 0;
+
+    if (target_bits & 0x80) {
+        host_bits |= float_flag_invalid;
+    }
+    if (target_bits & 0x40) {
+        host_bits |= float_flag_overflow;
+    }
+    if (target_bits & 0x20) {
+        host_bits |= float_flag_underflow;
+    }
+    if (target_bits & 0x10) {
+        host_bits |= float_flag_divbyzero;
+    }
+    if (target_bits & 0x08) {
+        host_bits |= float_flag_inexact;
+    }
+    return host_bits;
+}
+
+uint32_t cpu_m68k_get_fpsr(CPUM68KState *env)
+{
+    int host_flags = get_float_exception_flags(&env->fp_status);
+    int target_flags = cpu_m68k_exceptbits_from_host(host_flags);
+    int except = (env->fpsr & ~(0xf8)) | target_flags;
+    return except;
+}
+
+uint32_t HELPER(get_fpsr)(CPUM68KState *env)
+{
+    return cpu_m68k_get_fpsr(env);
+}
+
+void cpu_m68k_set_fpsr(CPUM68KState *env, uint32_t val)
+{
+    env->fpsr = val;
+
+    int host_flags = cpu_m68k_exceptbits_to_host((int) env->fpsr);
+    set_float_exception_flags(host_flags, &env->fp_status);
+}
+
+void HELPER(set_fpsr)(CPUM68KState *env, uint32_t val)
+{
+    cpu_m68k_set_fpsr(env, val);
+}
+
 #define PREC_BEGIN(prec)                                        \
     do {                                                        \
         FloatX80RoundPrec old =                                 \