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-rw-r--r--target/openrisc/cpu.c1
-rw-r--r--target/openrisc/cpu.h2
-rw-r--r--target/openrisc/fpu_helper.c13
-rw-r--r--target/openrisc/machine.c11
-rw-r--r--target/openrisc/sys_helper.c16
5 files changed, 38 insertions, 5 deletions
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
index b931605e62..f96a69e278 100644
--- a/target/openrisc/cpu.c
+++ b/target/openrisc/cpu.c
@@ -55,6 +55,7 @@ static void openrisc_cpu_reset(CPUState *s)
cpu->env.sr = SR_FO | SR_SM;
cpu->env.lock_addr = -1;
s->exception_index = -1;
+ cpu_set_fpcsr(&cpu->env, 0);
#ifndef CONFIG_USER_ONLY
cpu->env.picmr = 0x00000000;
diff --git a/target/openrisc/cpu.h b/target/openrisc/cpu.h
index 71c5959828..0ad02eab79 100644
--- a/target/openrisc/cpu.h
+++ b/target/openrisc/cpu.h
@@ -413,6 +413,8 @@ static inline void cpu_set_sr(CPUOpenRISCState *env, uint32_t val)
env->sr = (val & ~(SR_F | SR_CY | SR_OV)) | SR_FO;
}
+void cpu_set_fpcsr(CPUOpenRISCState *env, uint32_t val);
+
#define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0
#endif /* OPENRISC_CPU_H */
diff --git a/target/openrisc/fpu_helper.c b/target/openrisc/fpu_helper.c
index 7bcef9dc53..59e1413279 100644
--- a/target/openrisc/fpu_helper.c
+++ b/target/openrisc/fpu_helper.c
@@ -61,6 +61,19 @@ void HELPER(update_fpcsr)(CPUOpenRISCState *env)
}
}
+void cpu_set_fpcsr(CPUOpenRISCState *env, uint32_t val)
+{
+ static const int rm_to_sf[] = {
+ float_round_nearest_even,
+ float_round_to_zero,
+ float_round_up,
+ float_round_down
+ };
+
+ env->fpcsr = val & 0x7ff;
+ set_float_rounding_mode(rm_to_sf[extract32(val, 1, 2)], &env->fp_status);
+}
+
uint64_t HELPER(itofd)(CPUOpenRISCState *env, uint64_t val)
{
return int64_to_float64(val, &env->fp_status);
diff --git a/target/openrisc/machine.c b/target/openrisc/machine.c
index 0a96404dc6..b92985d99b 100644
--- a/target/openrisc/machine.c
+++ b/target/openrisc/machine.c
@@ -121,10 +121,21 @@ static const VMStateDescription vmstate_env = {
}
};
+static int cpu_post_load(void *opaque, int version_id)
+{
+ OpenRISCCPU *cpu = opaque;
+ CPUOpenRISCState *env = &cpu->env;
+
+ /* Update env->fp_status to match env->fpcsr. */
+ cpu_set_fpcsr(env, env->fpcsr);
+ return 0;
+}
+
const VMStateDescription vmstate_openrisc_cpu = {
.name = "cpu",
.version_id = 1,
.minimum_version_id = 1,
+ .post_load = cpu_post_load,
.fields = (VMStateField[]) {
VMSTATE_CPU(),
VMSTATE_STRUCT(env, OpenRISCCPU, 1, vmstate_env, CPUOpenRISCState),
diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c
index cf8e637b08..d9fe6c5948 100644
--- a/target/openrisc/sys_helper.c
+++ b/target/openrisc/sys_helper.c
@@ -37,8 +37,10 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
CPUState *cs = env_cpu(env);
target_ulong mr;
int idx;
+#endif
switch (spr) {
+#ifndef CONFIG_USER_ONLY
case TO_SPR(0, 11): /* EVBAR */
env->evbar = rb;
break;
@@ -179,10 +181,12 @@ void HELPER(mtspr)(CPUOpenRISCState *env, target_ulong spr, target_ulong rb)
}
cpu_openrisc_timer_update(cpu);
break;
- default:
+#endif
+
+ case TO_SPR(0, 20): /* FPCSR */
+ cpu_set_fpcsr(env, rb);
break;
}
-#endif
}
target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
@@ -193,8 +197,10 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
OpenRISCCPU *cpu = env_archcpu(env);
CPUState *cs = env_cpu(env);
int idx;
+#endif
switch (spr) {
+#ifndef CONFIG_USER_ONLY
case TO_SPR(0, 0): /* VR */
return env->vr;
@@ -303,11 +309,11 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
case TO_SPR(10, 1): /* TTCR */
cpu_openrisc_count_update(cpu);
return cpu_openrisc_count_get(cpu);
+#endif
- default:
- break;
+ case TO_SPR(0, 20): /* FPCSR */
+ return env->fpcsr;
}
-#endif
/* for rd is passed in, if rd unchanged, just keep it back. */
return rd;